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Breathers in transformers are used to prevent moisture and dust from entering the transformer tank.
Silica gel breathers absorb moisture from the air inside the transformer tank.
Magnetic oil level indicators prevent dust and moisture from entering the transformer tank.
Desiccant breathers also help in keeping the transformer tank dry and free from contaminants.
UPS scheme drawing and explanation involves understanding the Uninterruptible Power Supply system and its components.
UPS system provides backup power during electrical outages or fluctuations.
Components include battery, inverter, rectifier, and bypass switch.
UPS scheme drawing shows how these components are connected and function together.
Example: UPS scheme drawing may include arrows showing the flow of electricity fr...
I was interviewed before Feb 2024.
I applied via Campus Placement and was interviewed in Sep 2020. There were 3 interview rounds.
Pumps: centrifugal, positive displacement, axial flow. Compressors: reciprocating, rotary, centrifugal.
Centrifugal pumps use a rotating impeller to move fluid.
Positive displacement pumps move fluid by trapping a fixed amount and forcing it through the discharge.
Axial flow pumps use propellers to move fluid.
Reciprocating compressors use pistons to compress gas.
Rotary compressors use rotating screws or vanes to compress ...
Characteristic curve of a pump shows the relationship between flow rate and head developed by the pump.
It is a graph plotted between flow rate and head developed by the pump.
It helps in determining the efficiency of the pump.
The curve is obtained by conducting experiments on the pump.
It is used to select the appropriate pump for a given application.
Shutoff pressure is the maximum pressure a pump can generate when it is not pumping any fluid.
Shutoff pressure is also known as deadhead pressure.
It is the pressure at which the pump can no longer move any fluid.
It is important to know the shutoff pressure to prevent damage to the pump and system.
For example, if the shutoff pressure of a pump is 100 psi, the pump will stop generating flow when the pressure in the syste
Types of columns and their selection criteria for engineering projects.
Types of columns include steel, concrete, timber, and composite columns.
Selection criteria depend on factors such as load capacity, material availability, and cost.
For example, steel columns are often used in high-rise buildings due to their strength and durability.
Concrete columns are preferred for their fire resistance and low maintenance.
Timber c...
Design of column, heat exchanger, and centrifugal pump involves various factors such as fluid properties, operating conditions, and material selection.
Column design involves determining the column diameter, height, and packing material based on the required separation efficiency and pressure drop.
Heat exchanger design involves selecting the appropriate type of exchanger, determining the heat transfer area, and selectin...
Joule-Thomson coefficient is the change in temperature of a gas when it is allowed to expand or contract without any work being done.
It is a measure of the rate of change of temperature with respect to pressure at constant enthalpy.
It is used in cryogenic technology to determine the cooling effect of a gas when it expands through a valve or porous plug.
The coefficient can be positive or negative depending on the gas an...
Refrigeration cycle is a thermodynamic process used in refrigerators and air conditioners to transfer heat from a low-temperature region to a high-temperature region.
The cycle consists of four main components: compressor, condenser, expansion valve, and evaporator.
The refrigerant is compressed by the compressor and then condensed in the condenser, releasing heat to the surroundings.
The high-pressure liquid refrigerant ...
Gujarat Narmada Valley Fertilizers & Chemicals interview questions for popular designations
I applied via Recruitment Consultant and was interviewed in Aug 2020. There were 3 interview rounds.
I applied via Company Website and was interviewed before Apr 2020. There were 3 interview rounds.
I applied via Naukri.com and was interviewed in May 2019. There were 3 interview rounds.
I was interviewed in Dec 2016.
I was interviewed in Dec 2016.
I am a maintenance engineer with experience in troubleshooting and repairing various mechanical and electrical systems.
I have a degree in mechanical engineering
I have worked in the maintenance department of a manufacturing company for 5 years
I am skilled in using diagnostic tools and equipment to identify and fix issues
I have experience in maintaining and repairing HVAC systems, conveyor belts, and production machinery
Designed and implemented a predictive maintenance system for a manufacturing plant.
Researched different predictive maintenance techniques and technologies
Collected and analyzed historical maintenance data to identify patterns and trends
Developed algorithms to predict equipment failures before they occur
Implemented a real-time monitoring system to track equipment performance
Collaborated with maintenance team to integrat
Vidyanagar is a locality in Hyderabad known for its educational institutions.
Vidyanagar is home to several prestigious colleges and universities such as Osmania University, St. Ann's College for Women, and National Institute of Nutrition.
The area is also known for its coaching centers and study material shops that cater to students preparing for competitive exams.
Vidyanagar is well-connected to other parts of the city ...
During my internship, I learned about various maintenance techniques and procedures.
Learned how to conduct routine maintenance checks on equipment
Gained experience in troubleshooting and repairing machinery
Developed skills in reading technical manuals and schematics
Assisted in the installation of new equipment and systems
Learned about safety protocols and procedures in the workplace
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posted on 21 Jan 2025
I was interviewed in Dec 2024.
Shaft balancing in accordance with ISO 21940-11 and ISO 21940-12 standards involves reducing vibrations by adjusting the mass distribution along the shaft.
Shaft balancing aims to minimize vibrations in rotating machinery by adjusting the mass distribution along the shaft.
ISO 21940-11 specifies the balancing process for rigid rotors, while ISO 21940-12 covers the balancing of flexible rotors.
Balancing involves adding or...
Equipment alignment involves ensuring that all components of a machine are properly positioned and oriented to work efficiently and accurately.
Ensuring that all parts of the equipment are correctly positioned relative to each other
Checking and adjusting the alignment of shafts, belts, gears, and other components
Using precision tools such as laser alignment systems to achieve accurate alignment
Proper alignment helps pre...
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