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- Question
According to Prevost's theory of exchanges, every body irrespective of its temperature continuously emit heat radiations to the surrounding bodies and at the same time receives heat radiations from the surrounding bodies.
Options- A. True
- B. False
- Correct Answer
- True
- 1. Which of the following statement is correct?
Options- A. In a compressible flow, the volume of the flowing liquid changes during the flow.
- B. A flow in which the volume of the flowing liquid does not change, is called incompressible flow.
- C. When the particles rotate about their own axes while flowing, the flow is said to be rotational flow.
- D. all of the above Discuss
- 2. Which one of the following event would reduce volumetric efficiency of a vertical compression ignition engine?
Options- A. inlet valve closing after bottom dead centre
- B. inlet valve closing before bottom dead centre
- C. inlet valve opening before top dead centre
- D. exhaust valve closing after top dead centre Discuss
- 3. Which of the following statement is correct?
Options- A. Compression ratio for petrol engines varies from 6 to 10.
- B. Higher compression ratio in diesel engines results in higher pressures.
- C. Petrol engines work on Otto cycle.
- D. all of the above Discuss
- 4. Which of the following fuel detonates readily?
Options- A. Benzene
- B. Iso-octane
- C. Normal heptane
- D. Alcohol Discuss
- 5. Which of the following does not relate to a spark ignition engine?
Options- A. Ignition coil
- B. Spar kplug
- C. Carburettor
- D. Fuel injector Discuss
- 6. Which of the following fuel has little tendency towards detonation?
Options- A. Benzene
- B. Iso-octane
- C. Normal heptane
- D. Alcohol Discuss
- 7. Which one of the following is the effect of blade shape on performance of a centrifugal compressor?
Options- A. Backward curved blades has poor efficiency
- B. Backward curved blades lead to stable performance
- C. Forward curved blades has higher efficiency
- D. Forward curved blades produce lower pressure ratio Discuss
- 8. Which of the following statement is wrong?
Options- A. The reaction turbines are used for low head and high discharge.
- B. The angle of taper on draft tube is less than 8°.
- C. An impulse turbine is generally fitted slightly above the tail race.
- D. A Francis turbine is an impulse turbine. Discuss
- 9. A turbine is required to develop 1500 kW at 300 r.p.m. under a head of 150 m. Which of the following turbine should be used?
Options- A. Pelton wheel with one nozzle
- B. Pelton wheel with two or more nozzles
- C. Kaplan turbine
- D. Francis turbine Discuss
- 10. Which of the following statement is correct?
Options- A. The centrifugal pump is suitable for large discharge and smaller heads.
- B. The centrifugal pump requires less floor area and simple foundation as compared to reciprocating pump.
- C. The efficiency of centrifugal pump is less as compared to reciprocating pump.
- D. all of the above Discuss
More questions
Correct Answer: all of the above
Correct Answer: inlet valve closing before bottom dead centre
Correct Answer: all of the above
Correct Answer: Normal heptane
Correct Answer: Fuel injector
Correct Answer: Iso-octane
Correct Answer: Forward curved blades produce lower pressure ratio
Correct Answer: A Francis turbine is an impulse turbine.
Correct Answer: Pelton wheel with one nozzle
Correct Answer: all of the above
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