Deep Industries Production Graduate Engineer Trainee Interview Questions and Answers

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Q1. Explain performance curves of centrifugal pump
Ans. 
Performance curves of centrifugal pump show the relationship between flow rate, head, and efficiency.
• Performance curves show how a pump performs at different flow rates and heads.

• The curve typically includes lines for efficiency, power consumption, and NPSH requirements.

• The shape of the curve can indicate the pump's operating range and efficiency.

• Operating a pump outside of its recommended range can lead to issues like
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Q2. Explain best efficency point of centrifugal pump
Ans. 
The best efficiency point of a centrifugal pump is the operating point where the pump achieves the highest efficiency.
• The best efficiency point is typically located near the pump's BEP (Best Efficiency Point) on the pump curve.

• At the best efficiency point, the pump operates with the least amount of energy consumption and highest output.

• Operating the pump away from the best efficiency point can lead to decreased efficie...read more
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Q3. Explain joule Thomson effect
Ans. 
Joule Thomson effect is the change in temperature of a gas when it is allowed to expand without performing work.
• Occurs when a gas expands through a valve or porous plug

• No external work is done on or by the gas

• Temperature change depends on the gas properties and initial conditions

• Used in natural gas processing to cool the gas for further processing
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Q4. Explain iron carbon phase diagram
Ans. 
Iron carbon phase diagram shows the phases of iron and carbon at different temperatures and compositions.
• Shows the phases of iron and carbon at different temperatures and compositions

• Consists of regions for austenite, ferrite, cementite, and pearlite

• Helps in understanding the microstructure of steel

• Critical points like eutectic point and eutectoid point are important

• Used in heat treatment processes to control the prope
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Q5. Explain series and parallel operation of pumps
Ans. 
Series and parallel operation of pumps involve connecting multiple pumps together to achieve desired flow rates and pressures.
• In series operation, pumps are connected one after the other to increase the total head or pressure that the system can deliver.

• In parallel operation, pumps are connected side by side to increase the total flow rate that the system can deliver.

• Series operation is used when high pressure is requi...read more
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