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- Question
Two shafts 'A' and 'B' have the same material. The shaft 'A' is solid of diameter 100 mm. The shaft 'B' is hollow with outer diameter 100 mm and inner diameter 50 mm. The torque transmitted by shaft 'B' is __________ as that of shaft 'A'.
Options- A. 1/6
- B. 1/8
- C. 1/4
- D. 15/16
- Correct Answer
- 15/16
- 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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