Nayara Energy Supervisor Interview Questions and Answers

Q1. What is cavitation in centrifugal pump? How do you mean by NPSH?
Ans. 
Cavitation is the formation of vapor bubbles in a centrifugal pump due to low pressure. NPSH stands for Net Positive Suction Head.
• Cavitation occurs when the pressure at the pump inlet drops below the vapor pressure of the liquid, causing the formation of vapor bubbles.

• These vapor bubbles collapse when they reach higher pressure areas, leading to damage to the pump impeller and reduced pump performance.

• Cavitation can be...read more
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Q2. What is surging? How do you manage lubrication in different rotating equipment?
Ans. 
Surging is a phenomenon in rotating equipment where the flow rate becomes unstable.
• Surging occurs when the flow rate through a rotating equipment fluctuates due to changes in operating conditions.

• It can lead to reduced efficiency, increased wear and tear, and potential damage to the equipment.

• To manage lubrication in different rotating equipment, it is important to monitor and control the flow rate, viscosity, and temp...read more
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Q1. About Past experience present working, family background
Ans. Technical round on MEP execution related
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Q1. Technical and commercial
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Q1. About total experience details and personal details
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Q2. Current company details
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Q1. Overall experience and responsibilities in current company
Ans. 
I have 5 years of experience in my current company, where I have managed a team of 10 employees and overseen various projects.
• Managed a team of 10 employees

• Oversaw various projects and initiatives

• Responsible for setting goals and targets for the team

• Collaborated with other departments to ensure project success
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Q2. About TQM
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Q1. About XLPE formulation
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Q2. About SAP production module and experience
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Q3. Six sigma, Lean manufacturing, Safety
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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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Engineering reasoning

Q1. Types of chiller, compressor & plastic,
Ans. 
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
Ans. 
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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