Discussion
Home ‣ Mechanical Engineering ‣ Steam Nozzles and Turbines See What Others Are Saying!
- Question
In velocity compounding of an impulse turbine, the expansion of steam takes place in a nozzle or a set of nozzles from the boiler pressure to condenser pressure.
Options- A. True
- B. False
- Correct Answer
- True
- 1. Production cost refers to prime cost plus
Options- A. factory overheads
- B. factory and administration overheads
- C. factory, administration and sales overheads
- D. factory, administration, sales overheads and profit Discuss
- 2. In a four wheel drive (4WD), the number of gear boxes are
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 3. When the connection between the two elements is such that only required kind of relative motion occurs, it is known as self-closed pair.
Options- A. Right
- B. Wrong Discuss
- 4. The instrument which has all the features of try-square, bevel protractor, rule and scriber, is
Options- A. outside micrometer
- B. inside micrometer
- C. depth gauge micrometer
- D. combination set Discuss
- 5. An electric cable of aluminium conductor (k = 240 W/mK) is to be insulated with rubber (k = 0.15 W/mK). The cable is to be located in air (h = 6 W/m2). The critical thickness of insulation will be
Options- A. 25 mm
- B. 40 mm
- C. 160 mm
- D. 800 mm Discuss
- 6. A grey body is one whose absorptivity does not vary with temperature and wave length of the incident ray.
Options- A. True
- B. False Discuss
- 7. The fluids used in electrolux refrigerator are
Options- A. water and hydrogen
- B. ammonia and hydrogen
- C. ammonia, water and hydrogen
- D. none of these Discuss
- 8. In a coil ignition system of petrol engines, a condenser is connected across the contact-breaker in order to
Options- A. prevent sparking across the gap between the points
- B. cause more rapid break of the primary current, giving a higher voltage in the secondary circuit
- C. both (a) and (b)
- D. none of the above Discuss
- 9. The purpose of heat treatment is to
Options- A. relieve the stresses set up in the material after hot or cold working
- B. modify the structure of the material
- C. change grain size
- D. any one of these Discuss
- 10. The characteristic that is enhanced by the honing of cylinder sleeves inner surface is
Options- A. cooling efficiency
- B. resistance to wear
- C. lubrication performance
- D. none of these Discuss
More questions
Correct Answer: factory overheads
Correct Answer: 2
Correct Answer: Right
Correct Answer: combination set
Correct Answer: 25 mm
Correct Answer: True
Correct Answer: ammonia, water and hydrogen
Correct Answer: both (a) and (b)
Correct Answer: any one of these
Correct Answer: lubrication performance
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