Thermax Limited
100+ Interview Questions and Answers
Q1. If you don't have any safety equipment and documents how to complete the work ?
I would immediately stop the work and assess the situation to determine the necessary safety equipment and documents.
Stop the work immediately to prevent any potential hazards or accidents.
Assess the situation to determine the necessary safety equipment and documents.
Obtain the required safety equipment and documents before resuming work.
Communicate the importance of safety equipment and documents to all team members to prevent future incidents.
Q2. What you check before starting the work at height activity?
Before starting work at height, I check...
The condition of the equipment to be used
The stability of the work surface
The weather conditions
The availability and proper use of personal protective equipment
The presence of a rescue plan
The competency of the workers involved
The communication system in place
The adherence to safety regulations and procedures
Q3. What is safety equipment you are carry on the duty.
As a Safety Officer, I carry a range of safety equipment including a first aid kit, fire extinguisher, safety vest, and hard hat.
First aid kit for emergency medical situations
Fire extinguisher for fire emergencies
Safety vest for visibility and identification
Hard hat for head protection
Q4. What is working at height safety as per standard?
Working at height safety involves measures to prevent falls and injuries when working at elevated levels.
Employers must conduct risk assessments and provide appropriate safety equipment and training.
Workers must use the provided safety equipment and follow safe work procedures.
Examples of safety equipment include harnesses, guardrails, and safety nets.
The standard also includes requirements for inspection and maintenance of equipment and work areas.
Compliance with the standar...read more
Q5. How many percentage setting line safety valve.
The percentage setting of a line safety valve depends on the specific system and its requirements.
The percentage setting is determined by the pressure drop across the valve and the required flow rate.
Typically, line safety valves are set between 10-20% above the system's operating pressure.
However, this can vary depending on the specific system and its requirements.
It is important to ensure that the valve is set correctly to prevent overpressure and potential safety hazards.
Q6. What is the hazard in oil and gas field ?
The hazards in oil and gas field include fire, explosion, toxic gas exposure, falls, and equipment failure.
Fire and explosion risks due to the presence of flammable materials
Toxic gas exposure from leaks or releases
Falls from heights during drilling or maintenance activities
Equipment failure due to high pressure or temperature
Environmental hazards such as oil spills or gas leaks
Human error or negligence leading to accidents
Q7. How to conduct a JSA and Risk assessment?
JSA and risk assessment involve identifying hazards, evaluating risks, and implementing controls.
Identify the job or task to be analyzed
Break down the job into steps
Identify potential hazards for each step
Evaluate the risks associated with each hazard
Implement controls to eliminate or reduce the risks
Review and update the JSA and risk assessment regularly
Q8. What is the requirement of besic PPE's in plant ?
Basic PPEs are essential for plant safety. They include hard hats, safety glasses, earplugs, gloves, and safety shoes.
Hard hats protect the head from falling objects and impacts.
Safety glasses protect the eyes from flying debris and harmful substances.
Earplugs protect the ears from loud noises and prevent hearing loss.
Gloves protect the hands from cuts, burns, and chemical exposure.
Safety shoes protect the feet from falling objects and electrical hazards.
Other PPEs may be req...read more
Q9. What is draft in boiler
Draft in a boiler refers to the flow of air or gases through the combustion chamber and flue gas passages.
Draft is created by a difference in pressure between the inside and outside of the boiler.
It is necessary for proper combustion and efficient operation of the boiler.
There are two types of draft: natural draft and forced draft.
Natural draft is created by the buoyancy of hot gases, while forced draft is created by mechanical means such as fans or blowers.
Draft can be measu...read more
Q10. Which type of Oil used in turbine?
The type of oil used in turbines is typically turbine oil.
Turbine oil is specifically designed to meet the lubrication requirements of turbines.
It has excellent thermal stability and oxidation resistance.
Turbine oil helps reduce friction and wear in the turbine's moving parts.
It also provides cooling and helps remove contaminants from the system.
Different types of turbine oils are available, such as mineral-based, synthetic, and bio-based oils.
Q11. Explain basis safety equipment and working procedure ?
Safety equipment and working procedures are essential for preventing accidents and injuries in the workplace.
Safety equipment includes personal protective equipment (PPE) such as hard hats, safety glasses, gloves, and safety shoes.
Working procedures involve following established protocols for tasks such as lockout/tagout, confined space entry, and working at heights.
Regular safety training and communication are also important for ensuring that employees understand and follow ...read more
Q12. how to sense flow transmitter to transmit signal to controller in selected range?
Flow transmitter senses flow and transmits signal to controller in selected range.
Use a flow transmitter that is capable of sensing flow and transmitting a signal.
Connect the flow transmitter to the controller using appropriate wiring and communication protocols.
Configure the flow transmitter to operate within the desired range.
Ensure proper calibration of the flow transmitter to accurately measure and transmit flow data.
Implement suitable signal conditioning techniques to en...read more
Q13. What is the definition of Property, Plant, and Equipment (PPE), how is the cost capitalized, and what does site restoration treatment entail?
PPE refers to tangible assets used in production, cost is capitalized by including purchase price, installation costs, and necessary modifications, site restoration treatment involves returning a property to its original state.
Property, Plant, and Equipment (PPE) are tangible assets used in production, such as buildings, machinery, and vehicles.
The cost of PPE is capitalized by including the purchase price, installation costs, and any necessary modifications to make the asset...read more
Q14. What are provisions, contingent liabilities, and contingent assets, and can you provide examples of each?
Provisions, contingent liabilities, and contingent assets are financial terms related to potential future events.
Provisions are liabilities of uncertain timing or amount, such as warranty provisions or restructuring provisions.
Contingent liabilities are potential liabilities that may arise depending on the outcome of a future event, such as pending lawsuits or guarantees on loans.
Contingent assets are potential assets that may arise depending on the outcome of a future event,...read more
Q15. What is the importance of Hand over & Take over process
Hand over & Take over process is important for ensuring smooth transition of responsibilities and operations in power plants.
Ensures continuity of operations by transferring critical information and responsibilities from one shift to another
Helps in identifying any ongoing issues or concerns that need immediate attention
Reduces the risk of errors or accidents due to miscommunication or lack of information
Allows for proper documentation of activities and events for future refe...read more
Q16. WHICH MATERIAL IS USED FOR MAKING CYLINDER BLOCK AND PISTON?
Cylinder blocks are made of cast iron or aluminum alloy, while pistons are made of aluminum alloy.
Cylinder blocks can also be made of steel or magnesium alloy.
Aluminum alloy is preferred for pistons due to its lightweight and good thermal conductivity.
Cast iron is preferred for cylinder blocks in diesel engines due to its strength and durability.
Steel is preferred for high-performance engines due to its strength and heat resistance.
Magnesium alloy is used in some racing engin...read more
Q17. What is the importance of Boiler Chemical Preservation
Boiler chemical preservation is important to prevent corrosion and maintain efficiency in power plants.
Prevents corrosion in boiler components such as tubes and drums
Maintains heat transfer efficiency by preventing scale buildup
Extends the lifespan of the boiler system
Ensures safe and reliable operation of the power plant
Examples: using oxygen scavengers to prevent oxygen corrosion, using pH control agents to maintain proper water chemistry
Q18. Preparation of Hazard Identification & Assessment of Risk & Opportunity
The preparation of hazard identification and assessment of risk and opportunity is a crucial task for a Safety Officer.
Start by conducting a thorough hazard identification process to identify potential risks and hazards in the workplace.
Assess the identified hazards by evaluating the likelihood and severity of each risk.
Use various risk assessment techniques such as risk matrices, fault tree analysis, or bowtie analysis.
Consider both internal and external factors that may con...read more
Q19. What are the differences between deferred revenue, unearned revenue, and unbilled revenue?
Deferred revenue is revenue received in advance but not yet earned, unearned revenue is revenue received in advance and earned but not yet recognized, and unbilled revenue is revenue recognized but not yet billed.
Deferred revenue is revenue received in advance but not yet earned, so it is recorded as a liability until it is earned.
Unearned revenue is revenue received in advance and earned but not yet recognized, so it is recorded as a liability until it is recognized as reven...read more
Q20. Safety settings and which safety valve pop-up first and why?
Safety valves are designed to prevent overpressure in a system by releasing excess pressure. The valve that pops up first is typically the one set to the lowest pressure threshold.
Safety valves are set at different pressure thresholds to ensure that the system does not exceed its maximum pressure capacity.
The safety valve that pops up first is usually the one set to the lowest pressure threshold, as it will activate before the others in case of overpressure.
This sequential ac...read more
Q21. What do you know about fabrication?
Fabrication involves the creation or construction of something, often using various materials and techniques.
Fabrication is the process of making or manufacturing something.
It involves using materials and techniques to create a finished product.
Examples of fabrication include welding, machining, and 3D printing.
Fabrication can be used in various industries such as automotive, aerospace, and construction.
Q22. Which type of turbine in past company?
The type of turbine used in my past company was a gas turbine.
Gas turbine was used in my past company.
Gas turbines are commonly used in power generation and industrial applications.
Gas turbines operate by burning fuel to generate high-pressure gas, which then drives a turbine to produce electricity or mechanical power.
Q23. How many types of tube mstterls.
There are several types of tube materials used in various industries.
Common tube materials include steel, copper, aluminum, and plastic.
Steel tubes are often used in construction and industrial applications due to their strength and durability.
Copper tubes are commonly used in plumbing and HVAC systems for their excellent heat transfer properties.
Aluminum tubes are lightweight and corrosion-resistant, making them suitable for applications in the automotive and aerospace indus...read more
Q24. Cooling tower performance
Cooling tower performance is measured by its ability to remove heat from a process stream.
Cooling tower performance is affected by factors such as air flow rate, water flow rate, and temperature difference between the process stream and cooling water.
The efficiency of a cooling tower can be improved by increasing the surface area of the heat transfer media, using a more efficient fan, or optimizing the water distribution system.
Performance can be measured by the approach temp...read more
Q25. Which electrode is use welding purpose for corbon steel to alloy steel
For welding carbon steel to alloy steel, the electrode commonly used is E7018.
E7018 electrode is commonly used for welding carbon steel to alloy steel
It is a low-hydrogen electrode that provides strong welds with good impact resistance
The electrode operates on DC current and is suitable for both vertical and overhead welding positions
Q26. WHAT IS SUPERCHARGING AND TURBOCHARGING?
Supercharging and turbocharging are methods of increasing the power output of an engine by forcing more air into the combustion chamber.
Supercharging uses a belt-driven compressor to force more air into the engine
Turbocharging uses exhaust gases to spin a turbine which compresses air and forces it into the engine
Both methods increase engine power and performance
Superchargers provide instant boost while turbochargers have a slight delay before boost kicks in
Examples of superch...read more
Q27. What is the importance of DM Plant in Power Plant
DM Plant is crucial in power plants for removing impurities from water used in boilers, preventing scaling and corrosion.
DM Plant helps in producing high-purity water for boiler feed, reducing scaling and corrosion in the boiler tubes.
It removes impurities like calcium, magnesium, and silica from water, preventing damage to the boiler.
DM Plant plays a key role in maintaining the efficiency and longevity of the power plant equipment.
Regular maintenance and monitoring of DM Pla...read more
Q28. What is the reason of Condenser Vaccum getting gradually lowering treand ?
Condenser vacuum gradually lowering trend may be due to air leakage, cooling water temperature increase, or decrease in cooling water flow rate.
Air leakage in the condenser system can lead to a decrease in vacuum levels.
Increase in cooling water temperature can reduce the efficiency of the condenser, causing vacuum levels to drop.
Decrease in cooling water flow rate can also impact the condenser's ability to maintain proper vacuum levels.
Q29. Reduce the process time and call back to early
To reduce process time and call back early, we need to analyze the current process and identify bottlenecks.
Analyze the current process flow
Identify bottlenecks and areas of improvement
Implement process improvements such as automation or streamlining
Monitor and measure the impact of changes
Continuously review and improve the process
Q30. When CT of AOP motor is bypassed then what effect on the motor ?
Bypassing the CT of an AOP motor can lead to overcurrent and damage to the motor.
Bypassing the CT can result in the motor drawing excessive current.
This can lead to overheating of the motor windings.
Overcurrent can cause damage to the motor components.
It can also pose a safety risk due to potential electrical faults.
Q31. A 22 kw AOP motor CT cable burn again and again what is the reason ?
The repeated burning of a 22 kW AOP motor CT cable may be due to overloading, short circuits, poor insulation, or incorrect cable sizing.
Check for overloading of the motor causing excessive heat in the cable
Inspect for short circuits in the motor or the wiring
Ensure proper insulation of the cable to prevent overheating
Verify if the cable size is appropriate for the motor's power requirements
Q32. Which type of boiler in past company?
The type of boiler in my past company was a high-pressure steam boiler.
The boiler in my past company was a high-pressure steam boiler.
It was used to generate steam for various industrial processes.
The boiler had a capacity of 10,000 pounds of steam per hour.
It was equipped with safety features such as pressure relief valves and temperature controls.
Regular maintenance and inspections were conducted to ensure its safe and efficient operation.
Q33. What is look ahead and how find 1month look ahead in P6?
Look ahead is a planning technique to anticipate future activities. In P6, the 1-month look ahead can be found using filters and layouts.
Look ahead is a proactive planning approach to identify and prepare for upcoming activities.
In P6, the 1-month look ahead can be created by applying filters and layouts to the project schedule.
Filters can be set to display activities that are scheduled within the next month.
Layouts can be customized to show specific columns and information r...read more
Q34. Working pr of steam in past company?
I have experience working with steam in my past company.
Operated and maintained steam control systems
Monitored steam pressure and temperature
Performed regular inspections and maintenance on steam equipment
Troubleshooted and resolved steam-related issues
Ensured compliance with safety regulations and protocols
Q35. Tell the interlock and permissive of boiler and turbine?
Interlocks and permissives are safety mechanisms in place to prevent unsafe operation of boiler and turbine systems.
Interlocks prevent certain actions from taking place unless specific conditions are met
Permissives allow certain actions to take place only if specific conditions are met
Example of interlock: Boiler feed pump interlock prevents the boiler from starting unless the feed pump is running
Example of permissive: Turbine start permissive allows the turbine to start only...read more
Q36. What is different between Cooling tower and chillers in thermal equipments.
Cooling towers remove heat from water used in industrial processes, while chillers cool water for air conditioning systems.
Cooling towers use evaporation to remove heat from water, while chillers use refrigeration to cool water.
Cooling towers are used in industrial processes such as power plants, while chillers are used in air conditioning systems for buildings.
Cooling towers are typically larger and more complex than chillers.
Examples of cooling tower applications include co...read more
Q37. How to calculate the pressure vessels blank diameter for dishes in hemisphere type
Calculating pressure vessel blank diameter for hemisphere type dishes
Determine the required volume and pressure of the vessel
Calculate the radius of the hemisphere using the formula r = d/2
Calculate the surface area of the hemisphere using the formula SA = 2πr^2
Calculate the required thickness of the vessel walls using the formula t = PR/(2SE - 0.2P)
Calculate the blank diameter using the formula BD = 2r + 2t
Q38. WHAT IS CARBON CREDIT AND ITS VALUE IN EURO?
Carbon credit is a permit that allows a company to emit a certain amount of carbon dioxide or other greenhouse gases.
Carbon credits are traded on carbon markets.
The value of a carbon credit in Euro varies depending on the market demand and supply.
The European Union Emissions Trading System (EU ETS) is the largest carbon market in the world.
In 2021, the price of a carbon credit in the EU ETS reached a record high of over 50 Euro per tonne of CO2.
Carbon credits can be used by c...read more
Q39. Difference between working principles of these machines,requirements,efficiency formulas
The working principles, requirements, and efficiency formulas of machines vary depending on their type and purpose.
Working principles: Machines can operate based on mechanical, electrical, hydraulic, or pneumatic principles.
Requirements: Machines may require power sources, specific operating conditions, maintenance, and safety measures.
Efficiency formulas: Different machines have specific efficiency formulas based on their output and input parameters.
Examples: Working princip...read more
Q40. If in back pressure turbine when inlet flow 40TPH but outlet flow 37TPH exuast then
The back pressure turbine is experiencing a flow imbalance between the inlet and outlet, resulting in a lower outlet flow than the inlet flow.
Possible causes could include a restriction in the turbine outlet, leakage in the system, or incorrect measurement of flow rates.
Check for any blockages or obstructions in the turbine outlet that may be causing the flow imbalance.
Verify the accuracy of the flow measurement devices to ensure correct readings are being obtained.
Q41. What are the 7 types of chemical hazards?
The 7 types of chemical hazards are physical, health, fire, reactivity, explosive, corrosive, and toxic.
Physical hazards: flammable, combustible, and explosive chemicals
Health hazards: carcinogens, irritants, and sensitizers
Fire hazards: chemicals that can ignite or fuel fires
Reactivity hazards: chemicals that can react violently with other substances
Explosive hazards: chemicals that can explode under certain conditions
Corrosive hazards: chemicals that can corrode or destroy ...read more
Q42. Chemical vs Biological oxygen demand in Water chemistry
Chemical and Biological Oxygen Demand are measures of water quality and indicate the amount of oxygen required to break down organic matter.
Chemical Oxygen Demand (COD) measures the amount of oxygen required to oxidize organic and inorganic matter in water.
Biological Oxygen Demand (BOD) measures the amount of oxygen required by microorganisms to break down organic matter in water.
COD is a faster test and measures both biodegradable and non-biodegradable organic matter.
BOD is ...read more
Q43. Which are the equipment used in steam turbine? And their principal and working and troubleshooting?
Equipment used in steam turbine include turbine blades, nozzles, casing, rotor, bearings, and governor.
Turbine blades: convert steam energy into mechanical energy
Nozzles: control the flow of steam into the turbine
Casing: contains and directs the steam flow through the turbine
Rotor: connected to the turbine blades and rotates to generate power
Bearings: support the rotor and reduce friction
Governor: regulates the speed of the turbine
Q44. If gas pressure is low what are the possibility and what is the corrective actions taken by you ?
Low gas pressure can lead to various issues like inefficient operation or equipment failure. Corrective actions include checking for leaks, adjusting regulators, and ensuring proper ventilation.
Check for leaks in the gas system
Adjust regulators to increase gas pressure
Ensure proper ventilation for gas combustion
Inspect gas supply lines for blockages or restrictions
Verify that gas appliances are functioning properly
Q45. 1.At drum level low ID will not run 2.PA will not run if ID not running 3.FD will not run if ID and PA not at running condition 4.Rotary feeder will not run if PA not running
The operation of various components in a system is dependent on the running condition of other components.
ID must be running for drum level low
PA requires ID to be running
FD needs both ID and PA to be running
Rotary feeder is dependent on PA running
Q46. What is Ind AS 115 and how does it apply to financial reporting? Explain 5 step?
Ind AS 115 is a new revenue recognition standard that impacts how revenue is recognized in financial statements.
Ind AS 115 is based on the core principle that revenue should be recognized to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled.
The standard outlines a 5-step model for recognizing revenue: identify the contract with the customer, identify the performance obligation...read more
Q47. Do you know oracle or sap?
Yes, I have knowledge of both Oracle and SAP.
I have experience working with Oracle databases and SAP ERP systems.
I am familiar with Oracle's SQL and PL/SQL languages.
I have used SAP modules such as SAP FI/CO and SAP MM.
I have completed training courses on Oracle and SAP.
I have successfully implemented Oracle and SAP solutions in previous projects.
Q48. What is the treatment of leases under Ind AS 116?
Under Ind AS 116, leases are recognized as right-of-use assets and lease liabilities on the balance sheet.
Leases are classified as finance leases or operating leases based on specific criteria.
For finance leases, the lessee recognizes a right-of-use asset and a lease liability on the balance sheet.
For operating leases, the lessee recognizes a right-of-use asset and a corresponding liability on the balance sheet.
Lease payments are apportioned between interest expense on the le...read more
Q49. How many tonn flow attemper flow
The question is asking about the tonnage flow rate of the attemper flow.
The tonnage flow rate refers to the amount of material or substance flowing through a system per unit of time.
The attemper flow is a term used in control room engineering to describe the flow of a cooling medium, such as water, to regulate temperature.
To answer the question, specific data on the attemper flow rate in tons would be required.
Q50. What is the purpose of job changing
Job changing can provide new challenges, opportunities for growth, higher salary, better work-life balance, and improved job satisfaction.
Opportunity for career advancement
Higher salary and benefits
Improved work-life balance
Enhanced job satisfaction
Acquiring new skills and experiences
Escaping a toxic work environment
Geographical relocation
Seeking better company culture
Q51. What is PWHT.? POST heating and Pre heating? PMI NDT P-91 Material Site Observation Report MIS KPI SITE TRAINING WELDING
PWHT stands for Post Weld Heat Treatment. It is a process used to relieve residual stresses and improve the mechanical properties of welds.
PWHT is commonly used in the welding industry to prevent cracking and improve the overall quality of welds.
Post heating and pre heating are processes used before and after welding to control the cooling rate of the material and reduce the risk of cracking.
PMI stands for Positive Material Identification, a technique used to analyze the comp...read more
Q52. Emergencies You face in a Thermal power plant
Emergencies in a thermal power plant can include fires, equipment failures, and electrical faults.
Fires can occur due to fuel leaks or electrical malfunctions.
Equipment failures can lead to shutdowns or accidents.
Electrical faults can cause power outages or damage to equipment.
Other emergencies may include steam leaks, chemical spills, or worker injuries.
Q53. Suddenly break live pipeline so what you do that's why without shut down plant.
I would immediately isolate the affected section of the pipeline and divert the flow to a safe location while ensuring minimal disruption to plant operations.
Isolate the affected section of the pipeline to contain the leak
Divert the flow to a safe location to prevent further damage
Implement temporary measures such as using clamps or valves to stop the leak
Coordinate with the team to assess the situation and plan for permanent repairs
Ensure safety protocols are followed throug...read more
Q54. How many types of bearing
There are several types of bearings used in various industries.
There are two main categories of bearings: plain bearings and rolling bearings.
Rolling bearings can be further classified into ball bearings and roller bearings.
Ball bearings include deep groove ball bearings, angular contact ball bearings, and thrust ball bearings.
Roller bearings include cylindrical roller bearings, tapered roller bearings, spherical roller bearings, and needle roller bearings.
Other types of bear...read more
Q55. What's fault of blower and how to vibration check?
Blower faults can include bearing wear, imbalance, and misalignment. Vibration checks can be done using specialized equipment.
Common blower faults include bearing wear, imbalance, and misalignment
Vibration checks can be done using specialized equipment such as a vibration analyzer
Check for any unusual noise or vibration during operation
Inspect the blower for any signs of wear or damage
Ensure proper lubrication of bearings and other moving parts
Q56. How to assign new chennal in Honeywell DCS ?
To assign a new channel in Honeywell DCS, you need to access the configuration software and follow the steps to add the channel.
Access the Honeywell DCS configuration software
Navigate to the channel configuration section
Add a new channel by specifying the channel number, type, and other relevant parameters
Save the changes and verify the new channel is successfully assigned
Q57. How to assign soft tag and hard tag in DCS logic.
Soft tags are assigned in software while hard tags are assigned in hardware.
Soft tags are used for variables that are not directly connected to hardware.
Hard tags are used for variables that are directly connected to hardware.
Soft tags can be assigned through the DCS software.
Hard tags are assigned through the hardware configuration.
Examples of soft tags include calculated values and setpoints.
Examples of hard tags include temperature sensors and valve positions.
Q58. What is difference between RTD and thermocouple used
RTD measures temperature using resistance change, while thermocouple uses voltage change.
RTD stands for Resistance Temperature Detector, while thermocouple generates voltage based on temperature difference.
RTDs are more accurate and stable compared to thermocouples.
RTDs have higher initial cost but lower long-term maintenance cost.
Thermocouples are more rugged and can withstand higher temperatures than RTDs.
Example: RTD is made of platinum, while a common type of thermocouple...read more
Q59. Types of work permit?
There are various types of work permits depending on the country and purpose of employment.
Temporary work permits
Permanent work permits
Seasonal work permits
Student work permits
Intra-company transfer work permits
Skilled worker permits
Business visit permits
Q60. Hazards involved in Power Plants
Power plants have hazards such as electrical, chemical, thermal, and radiological hazards.
Electrical hazards include electrocution, arc flashes, and electrical burns.
Chemical hazards include exposure to toxic chemicals and gases.
Thermal hazards include burns and heat stress.
Radiological hazards include exposure to ionizing radiation.
Other hazards include fire, explosion, and mechanical hazards.
Examples of power plants include nuclear power plants, coal-fired power plants, and...read more
Q61. Pump lineup and its efficiency
Pump lineup is crucial for efficient operation. Proper selection and maintenance can improve efficiency.
Pump lineup should be selected based on the required flow rate and head
Centrifugal pumps are commonly used for low viscosity fluids while positive displacement pumps are used for high viscosity fluids
Efficiency can be improved by proper maintenance such as regular cleaning and lubrication
Variable frequency drives can also improve efficiency by adjusting the pump speed to ma...read more
Q62. Cooling system and working principle of cooling tower.
Cooling towers are heat rejection devices that use water to remove heat from a process or system.
Cooling towers work on the principle of evaporation, where heat is transferred from the water to the air through the process of evaporation.
The hot water from the system is pumped to the top of the cooling tower, where it is distributed over the fill media to increase the surface area for evaporation.
As the water evaporates, it removes heat from the remaining water, which then flo...read more
Q63. Water treatment of DM water and Drum water speciation.
Water treatment of DM water and Drum water speciation involves processes to remove impurities and ensure water quality.
DM water treatment involves processes like reverse osmosis, ion exchange, and UV sterilization to remove impurities.
Drum water speciation involves analyzing the chemical composition of water in drums to ensure it meets required standards.
Both processes are crucial in industries like pharmaceuticals, electronics, and power plants to maintain water quality.
Regu...read more
Q64. How to calculate Boiler direct & indirect efficiency ?
Boiler efficiency can be calculated by measuring the heat input and heat output of the boiler.
Calculate the heat input by measuring the fuel flow rate, fuel calorific value, and fuel consumption.
Calculate the heat output by measuring the steam flow rate and steam enthalpy.
Direct efficiency = (Heat output / Heat input) * 100%
Indirect efficiency = Direct efficiency * Boiler efficiency of other components (like economizer, air preheater, etc.)
Q65. What is the monthly maintenance cost of your section ?
The monthly maintenance cost of my section is approximately $10,000.
The monthly maintenance cost includes expenses for spare parts, labor, equipment rental, and utilities.
Regular maintenance tasks such as lubrication, inspections, and repairs contribute to the overall cost.
Cost may vary depending on the size of the section, age of equipment, and frequency of maintenance activities.
Q66. What is the synchronisation process of plant ?
Synchronisation process of a plant involves matching the frequency, voltage, and phase angle of the incoming generator with the grid.
Ensure the generator frequency matches the grid frequency (50Hz or 60Hz).
Match the voltage levels of the generator with the grid.
Adjust the phase angle of the generator to synchronize with the grid.
Use synchronizing equipment like synchroscope or synchronizing lamps to ensure proper synchronization.
Once synchronized, close the circuit breaker to...read more
Q67. What is the importance of TBT
TBT (Tributyltin) is important in power plants for preventing biofouling in cooling systems.
TBT is used as a biocide to control the growth of organisms such as algae, barnacles, and mussels in cooling water systems.
Preventing biofouling helps maintain efficient heat transfer in power plant equipment.
TBT is regulated due to its environmental impact, as it can be toxic to marine life and bioaccumulate in the food chain.
Q68. What is a buyer?
A buyer is a person or entity who purchases goods or services in exchange for money or other forms of payment.
Buyers can be individuals or organizations.
They play a crucial role in the supply chain by selecting and procuring products or services.
Buyers negotiate prices, terms, and conditions with sellers.
They may conduct market research to identify potential suppliers and evaluate their offerings.
Buyers may also be responsible for managing supplier relationships and ensuring ...read more
Q69. pH value in feed pump and Boiler.
pH value is critical in feed pump and boiler to maintain water quality and prevent corrosion.
pH value in feed pump should be between 7.5 to 9.5 to prevent corrosion and scaling
pH value in boiler should be between 10.5 to 12.0 to prevent acidic corrosion
pH value can be controlled by adding chemicals like sodium hydroxide or sulfuric acid
Regular monitoring and adjustment of pH value is necessary to ensure efficient operation and prevent damage
Q70. What is the scope in this area?
The scope in energy management is vast and growing rapidly.
Energy efficiency improvements in buildings and industries
Renewable energy sources like solar, wind, and hydro power
Smart grid technology and energy storage solutions
Carbon footprint reduction and sustainability initiatives
Energy audits and management systems
Demand response programs and energy conservation measures
Q71. What is safety key ponts of boilers.
Key safety points of boilers include proper maintenance, regular inspections, and adherence to safety protocols.
Regular maintenance to prevent leaks and malfunctions
Proper ventilation to avoid carbon monoxide buildup
Adherence to safety protocols such as wearing protective gear and following operating procedures
Regular inspections to identify potential hazards and address them promptly
Q72. Brief discussion about alternator and transformer protection system ?
Alternator and transformer protection systems are essential for preventing damage and ensuring safe operation.
Alternator protection systems typically include overcurrent, overvoltage, and reverse power protection to safeguard the alternator from damage.
Transformer protection systems often involve differential protection, overcurrent protection, and temperature monitoring to prevent overheating and insulation breakdown.
Both systems may also incorporate alarm systems and automa...read more
Q73. Tell us about the Woodward 505 ?
Woodward 505 is a versatile control system used in industrial applications.
The Woodward 505 is a widely used control system in industries such as power generation, oil and gas, and marine.
It offers advanced features like PID control, sequencing, and communication capabilities.
The Woodward 505 is known for its reliability and robustness in harsh operating environments.
It can be easily integrated with various types of sensors and actuators for precise control.
Q74. What is PID and How does it work ?
PID stands for Proportional-Integral-Derivative, a control loop feedback mechanism used in engineering.
PID is a control algorithm that calculates an error value as the difference between a desired setpoint and a measured process variable.
Proportional (P) control responds to the current error value.
Integral (I) control accumulates past errors to correct the present error.
Derivative (D) control predicts future errors based on the rate of change of the error.
The combined use of ...read more
Q75. Boiler light up procedure .
The boiler light up procedure is the process of starting and igniting a boiler to generate steam.
Ensure all safety measures are in place before starting the procedure.
Open the boiler's fuel and air supply valves.
Purge the boiler of any remaining gases.
Ignite the pilot burner or spark igniter.
Monitor the flame and adjust fuel and air flow as needed.
Gradually increase the boiler's load and steam pressure.
Perform necessary checks and tests to ensure proper functioning.
Continue m...read more
Q76. What do you understand by 4 wire and 2 wire
4 wire and 2 wire are configurations used in electrical circuits for measuring resistance.
4 wire configuration is used for accurate resistance measurements by eliminating lead resistance
2 wire configuration is simpler but less accurate due to lead resistance affecting measurements
Examples: 4 wire used in precision instruments like multimeters, 2 wire used in basic circuit testing
Q77. What is thickness of the membrane
The thickness of the membrane depends on the type of membrane and its application.
The thickness of a membrane can range from a few nanometers to several millimeters.
The thickness of a membrane is determined by its intended use and the materials used to make it.
For example, the thickness of a reverse osmosis membrane used in water treatment can range from 0.1 to 0.5 microns.
Similarly, the thickness of a cell membrane can range from 5 to 10 nanometers.
The thickness of a membran...read more
Q78. What is the current CTC
CTC stands for Cost to Company, it refers to the total salary package of an employee including all benefits and perks.
CTC includes salary, bonuses, benefits, and any other perks provided by the company
It is important to consider CTC when evaluating job offers
CTC can vary based on the level of the position, industry, and company policies
Q79. What is mean RT in wastewater treatment plant
RT in wastewater treatment plant refers to the retention time, which is the amount of time wastewater remains in a treatment system.
RT is a critical parameter in wastewater treatment plants as it determines the efficiency of the treatment process.
It is calculated by dividing the volume of the reactor by the flow rate of influent wastewater.
A longer retention time allows for more thorough treatment of contaminants in the wastewater.
Shorter retention times may result in incompl...read more
Q80. How do you calculate plant efficiency?
Plant efficiency is calculated by dividing the actual output by the maximum possible output and multiplying by 100.
Determine the maximum possible output of the plant
Measure the actual output of the plant
Divide the actual output by the maximum possible output
Multiply the result by 100 to get the efficiency percentage
Efficiency = (Actual Output / Maximum Possible Output) x 100
Q81. Steam Drum level Transmitter type & it's working principle.
Steam drum level transmitter measures the level of water in the steam drum using differential pressure.
Uses differential pressure to measure the level of water in the steam drum
Consists of two pressure sensors, one at the bottom and one at the top of the drum
The difference in pressure between the two sensors is proportional to the level of water in the drum
Common types include capacitance, ultrasonic, and radar transmitters
Q82. What is exothermic vs endothermic?
Exothermic reactions release energy while endothermic reactions absorb energy.
Exothermic reactions release heat or light energy to the surroundings.
Endothermic reactions absorb heat or light energy from the surroundings.
Examples of exothermic reactions include combustion, oxidation, and neutralization.
Examples of endothermic reactions include melting of ice, evaporation of water, and photosynthesis.
Q83. 4CPM PERT 5. Earlier job responsibilities and activities that you look after
As a Senior Executive, I have looked after various job responsibilities and activities in my previous roles.
Managed cross-functional teams to achieve project goals
Developed and implemented strategic plans to increase revenue
Analyzed market trends and conducted competitor research
Led business development initiatives to expand customer base
Ensured compliance with regulatory requirements and company policies
Q84. COMPARE 2 STROKE 4 STROKE ENGINES
2 stroke engines have higher power output but lower fuel efficiency compared to 4 stroke engines.
2 stroke engines have a simpler design with fewer moving parts.
2 stroke engines produce power every revolution while 4 stroke engines produce power every other revolution.
2 stroke engines require a mixture of oil and fuel while 4 stroke engines have a separate oil system.
4 stroke engines have better fuel efficiency and produce less emissions than 2 stroke engines.
Examples of 2 str...read more
Q85. Explain the structure of the Honeywell DCS ?
The Honeywell DCS (Distributed Control System) is a modular system consisting of controllers, I/O modules, and operator stations.
Consists of controllers, I/O modules, and operator stations
Uses a network to communicate between components
Allows for centralized control and monitoring of processes
Supports various communication protocols such as Modbus, OPC, etc.
Example: Honeywell Experion PKS
Q86. Types of boilers ? Functions of boilers ? Various welding process and various NDT process ?
Types of boilers include fire tube, water tube, and electric boilers. Boilers function to generate steam or hot water for heating or power generation. Various welding processes include TIG, MIG, and stick welding. Various NDT processes include ultrasonic testing, radiography, and magnetic particle testing.
Types of boilers: fire tube, water tube, electric boilers
Functions of boilers: generate steam or hot water for heating or power generation
Various welding processes: TIG, MIG...read more
Q87. How to reduce Geho pump running hours
Reduce Geho pump running hours
Optimize pump settings and operating conditions
Implement regular maintenance and cleaning schedule
Use high-quality lubricants and replace worn-out parts
Consider upgrading to a more efficient pump model
Monitor pump performance and adjust as needed
Q88. Work scope for witness and review of testing of electrical equipments
Q89. How can you add value to Thermax ?
I can add value to Thermax by leveraging my strong sales experience, building relationships with clients, and implementing strategic sales strategies.
Utilizing my extensive sales experience to drive revenue growth
Building and maintaining strong relationships with clients to ensure customer satisfaction and loyalty
Implementing strategic sales strategies to penetrate new markets and increase market share
Providing valuable insights and feedback to improve products and services
Co...read more
Q90. How to optimized cost ,what is silica removal ,
Silica removal is a process used to optimize cost by reducing the presence of silica in a system.
Utilize filtration methods to remove silica particles from water or other liquids
Consider using ion exchange resins to selectively remove silica from a solution
Implement reverse osmosis or electrodialysis processes to effectively remove silica from water
Regularly monitor silica levels to ensure efficient removal and cost optimization
Q91. What is free float & total float?
Free float is the amount of time a task can be delayed without affecting the project's critical path. Total float is the total amount of time a task can be delayed without delaying the project's completion.
Free float is specific to an individual task, while total float is applicable to the entire project.
Free float is calculated by subtracting the early start date of a task from the early finish date of its successor task.
Total float is calculated by subtracting the early sta...read more
Q92. What are the high strength materials?
High strength materials are materials that possess superior mechanical properties and can withstand high loads and stresses.
High strength steels, such as AISI 4340 and AISI 4140, are commonly used in structural applications.
Titanium alloys, like Ti-6Al-4V, are known for their high strength-to-weight ratio and are used in aerospace and medical implants.
Nickel-based superalloys, such as Inconel 718, exhibit excellent strength at high temperatures and are used in gas turbines.
Fi...read more
Q93. How to know material like cs ss and as
Material like CS, SS, and AS can be identified based on their composition, properties, and application.
CS stands for Carbon Steel, which contains mainly carbon and iron. It is commonly used in construction and industrial applications.
SS stands for Stainless Steel, which contains chromium and nickel in addition to iron. It is known for its corrosion resistance and is used in food processing, medical equipment, and aerospace.
AS stands for Alloy Steel, which contains elements li...read more
Q94. Explain the necessity for flow optimization in heat exchangers
Flow optimization in heat exchangers is necessary to ensure efficient heat transfer and maximize energy savings.
Optimizing flow patterns helps to increase heat transfer efficiency
Proper flow distribution reduces fouling and scaling, improving heat exchanger performance
Optimizing flow rates can help minimize pressure drop and energy consumption
Flow optimization can also help in achieving uniform temperature distribution within the heat exchanger
Examples: Using baffles to enhan...read more
Q95. How to improve ahp watter recycling 100
Improving AHP water recycling to 100% requires a multi-faceted approach.
Invest in advanced water treatment technologies
Implement strict water conservation measures
Regularly monitor and maintain equipment
Educate employees and stakeholders on the importance of water conservation
Collaborate with local government and community organizations to promote sustainable water practices
Q96. Which is an exothermic reaction?
An exothermic reaction releases heat to the surroundings.
Exothermic reactions have a negative enthalpy change.
Examples include combustion, neutralization, and some types of polymerization.
They are often used in hand warmers and self-heating food packaging.
Exothermic reactions can be dangerous if they release too much heat too quickly, causing explosions or fires.
Q97. What is MIS? Describe one example
MIS stands for Management Information System, which is a computerized database that collects, processes, and presents information to support decision-making.
MIS helps in organizing and analyzing data to provide managers with information needed for decision-making
One example of MIS is a sales report that tracks sales performance, trends, and forecasts to help managers make strategic decisions
MIS can also include inventory management systems, customer relationship management sy...read more
Q98. How to do Motor PM ? What is your favorite work?
Motor PM involves regular maintenance and inspection of motors to ensure optimal performance and prevent breakdowns.
Perform regular visual inspections of the motor to check for any signs of wear or damage
Check and replace worn or damaged parts such as bearings, belts, and brushes
Clean the motor and its components to prevent buildup of dirt and debris
Perform tests to check the motor's electrical and mechanical performance
Keep detailed records of maintenance and repairs for fut...read more
Q99. Synchronisation of generator, motor protection and maintenance.
Synchronisation of generator involves aligning the speed and phase of the generator with the grid before connecting them. Motor protection and maintenance are crucial for ensuring the longevity and efficiency of the motor.
Synchronisation of generator involves matching the frequency, voltage, and phase angle of the generator with the grid before connecting them.
Motor protection includes measures such as overload protection, short circuit protection, and thermal protection to p...read more
Q100. Soil liquid & plastic limit criteria and compaction test requirement
Soil liquid & plastic limit criteria and compaction test requirement
Soil liquid limit is the moisture content at which soil transitions from a plastic to a liquid state
Soil plastic limit is the moisture content at which soil can be rolled into a thread of a specific diameter without breaking
Compaction test is used to determine the optimal moisture content and maximum dry density of soil for construction
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