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- Question
Fin is a casting defect which is due to thin projections of metal not intended as a part of casting.
Options- A. Correct
- B. Incorrect
- Correct Answer
- Correct
- 1. The mean effective pressure of a diesel engine having fixed compression ratio will __________ if cut off ratio decreases.
Options- A. increase
- B. decrease Discuss
- 2. In a centrifugal casting method, the impurities are collected in the centre of the casting.
Options- A. Yes
- B. No Discuss
- 3. The chimney draught varies with
Options- A. climatic conditions
- B. temperature of furnace gases
- C. height of chimney
- D. all of these Discuss
- 4. Which of the following pump is sucessfully used for lifting water to the boilers?
Options- A. Centrifugal pump
- B. Reciprocating pump
- C. Jet pump
- D. Air-lift pump Discuss
- 5. A thick pressure vessel is always used for the generation of steam, as it can withstand high pressures.
Options- A. True
- B. False Discuss
- 6. First law of thermodynamics deals with
Options- A. conservation of heat
- B. conservation of momentum
- C. conservation of mass
- D. conservation of energy Discuss
- 7. A small percentage of boron is added to steel in order to
Options- A. increase hardenability
- B. reduce machinability
- C. increase wear resistance
- D. increase endurance strength Discuss
- 8. According to equation of continuity,
Options- A. w1a1 = w2a2
- B. w1v1 = w2v2
- C. a1v1 = a2v2
- D. a1/v1 = a2/v2 Discuss
- 9. In case ofsensible cooling of air, the coil efficiency is given by
Options- A. B.P.F. - 1
- B. 1 - B.P.F.
- C.
- D. 1 + B.P.F. Discuss
- 10. The crown of the fire box is made hemispherical in order to resist intense heat in the fire box.
Options- A. True
- B. False Discuss
More questions
Correct Answer: decrease
Correct Answer: Yes
Correct Answer: all of these
Correct Answer: Jet pump
Correct Answer: False
Correct Answer: conservation of energy
Correct Answer: increase hardenability
Correct Answer: a1v1 = a2v2
Correct Answer: 1 - B.P.F.
Correct Answer: True
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