20+ HPCL-Mittal Energy Limited Interview Questions and Answers

To solve close tank level fluctuation, I would approach by identifying the root cause and implementing appropriate corrective measures.

• Check for any leaks in the tank or piping system

• Ensure proper calibration of level sensors

• Verify the control system settings and adjust if necessary

• Consider installing additional instrumentation such as a surge tank or pressure relief valve

• Perform regular maintenance and inspections to prevent future issues

If PT of extruder package required to change, I will follow the standard procedure for changing PT.

• Refer to the manufacturer's manual for the correct procedure

• Ensure that the system is depressurized and isolated before starting the work

• Use appropriate tools and equipment to remove the old PT and install the new one

• Perform leak testing and calibration after installation

• Update the documentation and inform the relevant personnel about the change

There are three types of orifice plates used to measure DP of a process flow line.

• Concentric

• Eccentric

• Segmental

At least 2 DI and 1 DO loop are needed to control a HT motor.

• DI loops are used for monitoring the motor's status and feedback signals.

• DO loops are used for controlling the motor's speed and direction.

• The number of loops required may vary depending on the specific motor and control system.

• Additional loops may be needed for safety interlocks and alarms.

Follow OSHA guidelines for confined space entry and ensure proper ventilation, communication, and rescue procedures.

• Conduct a thorough hazard assessment before entering the confined space

• Ensure proper ventilation and air quality testing

• Use appropriate personal protective equipment (PPE)

• Establish communication procedures and have a standby person outside the confined space

• Have a rescue plan in place and conduct regular drills

• Train all team members on confined space entry proce...read more

There are various types of flow measuring equipment available for measuring process flow.

• Magnetic flow meters

• Ultrasonic flow meters

• Vortex flow meters

• Coriolis flow meters

• Differential pressure flow meters

• Positive displacement flow meters

• Thermal flow meters

N in Ideal gas equation represents the number of moles of gas.

• N is the number of moles of gas in the system

• It is a measure of the amount of gas present

• N is directly proportional to the number of gas particles

• Ideal gas equation is PV = nRT, where n is the number of moles of gas

• N is usually measured in moles

Mass flow is measured based on the principle of conservation of mass and the relationship between flow rate, velocity, and cross-sectional area.

• Mass flow can be measured using various techniques such as Coriolis flow meters, thermal mass flow meters, and differential pressure flow meters.

• The principle of conservation of mass states that mass cannot be created or destroyed, only transferred or converted.

• The relationship between flow rate, velocity, and cross-sectional area is ...read more

The ideal gas equation relates the pressure, volume, and temperature of an ideal gas.

• The ideal gas equation is PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature.

• It describes the behavior of an ideal gas under various conditions.

• The equation can be used to calculate any one of the variables if the others are known.

• For example, if the pressure, volume, and temperature of a gas are known, th...read more

I can handle multiple types of HMI including SCADA, DCS, and PLC.

• I am proficient in SCADA (Supervisory Control and Data Acquisition) systems.

• I have experience with DCS (Distributed Control System) HMIs.

• I am familiar with PLC (Programmable Logic Controller) HMIs.

• I can work with various HMI software such as Wonderware, Ignition, and FactoryTalk.

• I am capable of configuring and troubleshooting HMI systems.

• I stay updated with the latest HMI technologies and advancements.

PID control is a feedback control mechanism used in automation systems to regulate a process variable.

• PID stands for Proportional-Integral-Derivative.

• It continuously calculates an error value by comparing the desired setpoint with the actual process variable.

• The controller then adjusts the control output based on the error value and the proportional, integral, and derivative gains.

• Proportional control provides an output that is proportional to the error.

• Integral control elimi...read more

TBT stands for 'Tool Box Talk'.

• TBT is a safety meeting held before starting a job or task.

• It is a way to discuss potential hazards and safety procedures.

• TBTs are usually short and focused on a specific topic.

• They are important for promoting a safety culture in the workplace.

• Examples of TBT topics include working at heights, electrical safety, and PPE use.

PID control is necessary to maintain a desired setpoint and compensate for disturbances in a system.

• PID control helps maintain stability and accuracy in a system

• It adjusts the output based on the difference between the setpoint and actual value

• It can compensate for disturbances such as changes in load or input

• Examples include temperature control in HVAC systems and speed control in motors

A vortex flow meter measures fluid flow by detecting the frequency of vortices shed by a bluff body in the flow stream.

• A bluff body is placed in the flow stream to create vortices.

• The frequency of vortices is proportional to the flow rate.

• The meter measures the frequency and calculates the flow rate.

• Vortex flow meters are commonly used in steam, gas, and liquid applications.

DV6200 is calibrated using a multi-point calibration process.

• Perform a zero calibration by disconnecting the sensor and setting the output to zero.

• Perform a span calibration by applying a known input and adjusting the output to match.

• Perform a linearity calibration by applying multiple inputs and verifying the output matches the expected values.

• Record all calibration data and ensure it is within acceptable tolerances.

• Perform regular maintenance and recalibration as needed.

Bernoulli's theorem states that as the speed of a fluid increases, its pressure decreases.

• Describes the relationship between fluid speed and pressure

• Used in fluid dynamics and aerodynamics

• Can be applied to various scenarios such as air flow over an airplane wing or water flow through a pipe

• Formula: P + 1/2pv^2 + pgh = constant (where P is pressure, p is density, v is velocity, g is acceleration due to gravity, and h is height)

Confined space refers to an area with limited access and ventilation, posing potential hazards to workers.

• Examples include tanks, silos, sewers, and tunnels.

• Workers entering confined spaces must follow strict safety protocols.

• Hazards in confined spaces include lack of oxygen, toxic gases, and fire/explosion risks.

• Proper training and equipment are necessary for working in confined spaces.

IS standards specify the requirements for Personal Protective Equipment (PPEs) in India.

• IS 3521:2015 specifies the requirements for industrial safety helmets.

• IS 9473:2002 specifies the requirements for safety footwear.

• IS 9167:1979 specifies the requirements for eye protectors.

• IS 10245:2004 specifies the requirements for respiratory protective devices.

• IS 15323:2003 specifies the requirements for high visibility clothing.

• IS 12427:1988 specifies the requirements for hand gloves....read more

My areas of interest include software development, data analysis, and machine learning.

• Software development: I enjoy creating applications and solving problems using programming languages like Java and Python.

• Data analysis: I am interested in analyzing large datasets to extract meaningful insights and make data-driven decisions.

• Machine learning: I have a keen interest in developing algorithms and models to enable computers to learn and make predictions based on data.

• Example: ...read more

Work at height refers to any work that is performed above ground level where a person could fall and injure themselves.

• Work at height includes activities such as working on roofs, scaffolding, ladders, or elevated platforms.

• Safety measures such as fall protection equipment, guardrails, and safety nets should be used when working at height.

• Workers should be trained on proper procedures for working at height to prevent accidents.

• Examples of work at height include window cleanin...read more

Yes, pursuing a master's degree in engineering or a related field can enhance knowledge and career prospects.

• Consider pursuing a master's degree in your specific engineering discipline to gain specialized knowledge and skills.

• Explore interdisciplinary programs that combine engineering with other fields like business, computer science, or environmental studies.

• Research universities and programs that align with your interests and career goals.

• Look for opportunities to collabora...read more

My favorite subject is Mechanical Engineering.

• I enjoy studying the principles of mechanics and how they apply to various machines and systems.

• I find the design and analysis of mechanical systems fascinating.

• I am particularly interested in topics like thermodynamics, fluid mechanics, and solid mechanics.

• I have worked on projects involving the design and optimization of mechanical components.

• I appreciate the practical applications of mechanical engineering in industries like au...read more

Rankine cycle is a thermodynamic cycle used in power plants. Two-stroke engines have one power stroke per revolution, while four-stroke engines have one power stroke every two revolutions.

• Rankine cycle is a thermodynamic cycle used in steam power plants to convert heat into work.

• Two-stroke engines have one power stroke per revolution of the crankshaft, while four-stroke engines have one power stroke every two revolutions.

• Two-stroke engines are simpler and lighter but less fue...read more

I oversee the plant process and its parameters to ensure efficient and safe operations.

• Monitor and analyze plant performance data

• Adjust process parameters to optimize efficiency and output

• Ensure compliance with safety and environmental regulations

• Collaborate with maintenance and engineering teams to troubleshoot issues

• Implement process improvements to increase productivity and reduce costs

I have 2 years of experience in the field of mechanical engineering. My last plant was XYZ Ltd. and I hold a Bachelor's degree in Mechanical Engineering.

• 2 years of experience in mechanical engineering

• Last plant was XYZ Ltd.

• Hold a Bachelor's degree in Mechanical Engineering

Some challenges for company growth include market competition, financial constraints, and adapting to technological advancements.

• Market competition can make it difficult to stand out and attract customers.

• Financial constraints may limit the company's ability to invest in expansion or innovation.

• Adapting to technological advancements is crucial for staying relevant and competitive in the market.

• Regulatory changes can also pose challenges for company growth.

• Employee turnover an...read more

There are various types of turbines including steam, gas, hydro, wind, and tidal turbines.

• Steam turbines use steam to generate power

• Gas turbines use combustion to generate power

• Hydro turbines use water to generate power

• Wind turbines use wind to generate power

• Tidal turbines use tidal currents to generate power