Ongc Petro Additions DCS Operations Engineer Interview Questions and Answers

Q1. Learning from past companies.
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Q2. 5 core tools of Quality.
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Q3. IATF clauses for NPD.
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Q1. Basic as 5s, 3c, OEE, etc
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Q2. Technical as plastic moulding
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Q3. Hr documentation verificatoin
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Engineering reasoning

Q1. Types of chiller, compressor & plastic,
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There are different types of chillers, compressors, and plastics used in engineering.
• Types of chillers include absorption, centrifugal, and screw chillers.

• Compressors can be classified as reciprocating, rotary, and centrifugal compressors.

• Plastics used in engineering include polyethylene, polypropylene, and polystyrene.

• Each type of chiller, compressor, and plastic has its own unique properties and applications.
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Q2. Pneumatic & hydraulic, valves & actuators
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Q3. Cooling tower, range, approach
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Q4. Gear box & its types
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Gear box is a mechanical device that transmits power from an engine to the wheels. There are various types of gearboxes.
• Gearboxes are used in automobiles, industrial machinery, and other applications.

• The most common types of gearboxes are manual, automatic, and continuously variable transmissions (CVT).

• Manual gearboxes require the driver to manually shift gears using a clutch and gear stick.

• Automatic gearboxes shift ge...read more
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Q1. Types of chiller, refrigerant
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There are two types of chillers: air-cooled and water-cooled. Common refrigerants include R-22, R-134a, and R-410A.
• Air-cooled chillers use air to remove heat from the refrigerant, while water-cooled chillers use water.

• R-22 is a commonly used refrigerant, but it is being phased out due to its harmful effects on the environment.

• R-134a is a more environmentally friendly refrigerant, but it is less efficient than R-22.

• R-41...read more
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You have to be good at aptitude

Q1. Based on core subjects like Heat Transfer and Mass Transfer
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Q1. Types of heat transfers, what is kettle type reboiler, Iso systems
Ans. 
Heat transfer types include conduction, convection, and radiation. Kettle type reboiler is a type of heat exchanger used in distillation processes. ISO systems are international standards for quality management.
• Conduction transfers heat through a material without any movement of the material itself

• Convection transfers heat through the movement of fluids or gases

• Radiation transfers heat through electromagnetic waves

• Kett...read more
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Q2. Basic concept in fluid dynamics and Heat yransfer
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Q1. Last plant process detail Last plant emergency handling Start up - shut down Types of equipment knowledge
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Q1. Experience in field Last plant Qualification
Ans. 
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
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