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HPCL-Mittal Energy Limited
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posted on 23 Sep 2021
I applied via Referral and was interviewed before Sep 2020. There were 4 interview rounds.
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 outpu...
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
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.
P...
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 pe
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.
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.
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 ...
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
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 th...
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
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 wi
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.
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
There are three types of orifice plates used to measure DP of a process flow line.
Concentric
Eccentric
Segmental
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...
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.
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
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I appeared for an interview before Mar 2024, where I was asked the following questions.
I applied via Referral and was interviewed before Jul 2019. There was 1 interview round.
posted on 12 Apr 2022
I applied via Campus Placement and was interviewed before Apr 2021. There were 3 interview rounds.
Basic PCM
I have the necessary skills, experience, and leadership qualities to excel in the role of Assistant Manager.
I have a proven track record of successfully managing teams and achieving targets.
I possess strong communication and interpersonal skills, which are essential for effectively leading and motivating a team.
I am highly organized and detail-oriented, ensuring efficient operations and problem-solving.
I am adept at an...
In 5 years, I see myself as a successful Assistant Manager, leading a team and contributing to the growth of the company.
Leading a team of dedicated individuals
Implementing strategies to improve productivity and efficiency
Contributing to the growth and success of the company
Continuing to learn and develop new skills
Building strong relationships with colleagues and clients
My strengths include strong leadership skills, excellent communication abilities, and a knack for problem-solving. My weaknesses include a tendency to be overly critical of myself and a desire for perfection.
Strength: Strong leadership skills
Strength: Excellent communication abilities
Strength: Knack for problem-solving
Weakness: Overly critical of myself
Weakness: Desire for perfection
I am a highly motivated and experienced professional with a strong background in management and leadership.
Over 5 years of experience in management roles
Proven track record of successfully leading teams and achieving targets
Excellent communication and problem-solving skills
Strong organizational and time management abilities
Ability to adapt to changing environments and handle multiple tasks
Example: As a Manager at XYZ C...
posted on 9 Sep 2023
I applied via Company Website and was interviewed before Sep 2022. There were 3 interview rounds.
posted on 23 Dec 2023
I applied via Recruitment Consulltant and was interviewed in Jun 2023. There were 5 interview rounds.
The process involves creating a process flow diagram, handling emergency situations, and following safety precautions.
Create a process flow diagram to visualize the steps involved in the assistant manager role.
Establish protocols for handling emergency situations such as fire, medical emergencies, or security threats.
Ensure all staff are trained on emergency procedures and have access to emergency contact information.
I...
I am looking for a competitive salary based on my experience and qualifications.
I have researched the average salary range for Assistant Managers in this industry
I am open to discussing benefits and bonuses as part of the compensation package
I am confident in my abilities and believe I bring value to the team
posted on 6 Feb 2024
I applied via Campus Placement and was interviewed in Aug 2023. There was 1 interview round.
Pumps are devices that use mechanical action to move fluids from one place to another.
Pumps work by creating a pressure difference to push fluids through a system.
They typically consist of an inlet, an outlet, and an impeller or rotor.
The impeller rotates, creating centrifugal force that pushes the fluid outwards.
Positive displacement pumps use reciprocating or rotary motion to move fluid in discrete volumes.
Examples o...
A stress-strain graph shows the relationship between stress and strain in a material.
The graph typically has stress on the y-axis and strain on the x-axis.
It starts with a linear elastic region where stress is directly proportional to strain.
Beyond the elastic limit, the material enters the plastic region where permanent deformation occurs.
The graph may show a yield point, ultimate tensile strength, and fracture point.
...
posted on 7 Mar 2024
I appeared for an interview before Mar 2023, where I was asked the following questions.
posted on 12 May 2024
I applied via Recruitment Consulltant and was interviewed before May 2023. There were 3 interview rounds.
posted on 21 Jan 2023
I applied via Approached by Company and was interviewed before Jan 2022. There were 2 interview rounds.
VFDs are used in power plants to control the speed and torque of electric motors, resulting in energy savings and improved efficiency.
VFD stands for Variable Frequency Drive.
VFDs are used to control the speed of electric motors by varying the frequency of the electrical supply.
By adjusting the motor speed to match the required load, VFDs help in saving energy and reducing wear and tear on equipment.
VFDs also provide so...
Motor rpm is 1440 instead of 1500 due to the frequency of the power supply.
Motor rpm is determined by the frequency of the power supply.
In many countries, the standard frequency of the power supply is 50 Hz.
The synchronous speed of a motor is determined by the formula: (120 x frequency) / number of poles.
For a 4-pole motor and a 50 Hz power supply, the synchronous speed is 1500 rpm.
However, due to slip, the actual spee...
Some of the top questions asked at the HPCL-Mittal Energy Limited Instrumentation Commissioning Engineer interview -
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