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- Question
Which of the following statement is wrong?
Options- A. The heat transfer in liquid and gases takes place according to convection.
- B. The amount of heat flow through a body is dependent upon the material of the body.
- C. The thermal conductivity of solid metals increases with rise in temperature,
- D. Logarithmic mean temperature difference is not equal to the arithmetic mean temperature difference.
- Correct Answer
- The thermal conductivity of solid metals increases with rise in temperature,
- 1. 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
- 2. Which of the following fuel has little tendency towards detonation?
Options- A. Benzene
- B. Iso-octane
- C. Normal heptane
- D. Alcohol Discuss
- 3. 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
- 4. 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
- 5. 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
- 6. 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
- 7. Which of the following is a water tube boiler?
Options- A. Lancashire boiler
- B. Babcock and Wilcox boiler
- C. Locomotive boiler
- D. Cochran boiler Discuss
- 8. Which of the following is required for a steam condensing plant?
Options- A. Condenser
- B. Condensate pump
- C. Air extraction pump
- D. all of these Discuss
- 9. Which of the following statement indicates the difference between Cornish boiler and Lancashire boiler?
Options- A. Cornish boiler is a water tube boiler whereas Lancashire boiler is a fire tube boiler.
- B. Cornish boiler is a fire tube boiler whereas Lancashire boiler is a water tube boiler.
- C. Cornish boiler has one flue tube whereas Lancashire boiler has two flue tubes.
- D. Cornish boiler has two flue tubes whereas Lancashire boiler has one flue tube. Discuss
- 10. Which of the following are boiler accessories?
Options- A. economiser
- B. superheater
- C. both (a) and (b)
- D. none of these Discuss
More questions
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
Correct Answer: Babcock and Wilcox boiler
Correct Answer: all of these
Correct Answer: Cornish boiler has one flue tube whereas Lancashire boiler has two flue tubes.
Correct Answer: both (a) and (b)
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