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Discussion
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Steam Boilers and Engines
See What Others Are Saying!
Question
The relative efficiency is defined as the
Options
A. ratio of thermal efficiency to Rankine efficiency
B. ratio of brake power to the indicated power
C. ratio of heat equivalent to indicated power to the energy supplied in steam
D. product of thermal efficiency and Rankine efficiency
Correct Answer
ratio of thermal efficiency to Rankine efficiency
More questions
1. The natural convection air cooled condensers are used in
Options
A. domestic refrigerators
B. water coolers
C. room air conditioners
D. all of these
Show Answer
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Correct Answer: domestic refrigerators
2. The process of heat transfer from a hot body to a cold body, in a straight line, without affecting the intervening medium, is called radiation.
Options
A. True
B. False
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Correct Answer: True
3. The iron ore in the charge of blast furnace acts as an iron bearing mineral.
Options
A. True
B. False
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Correct Answer: True
4. A flow in which the quantity of liquid flowing per second is not constant, is called
Options
A. streamline flow
B. turbulent flow
C. steady flow
D. unsteady flow
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Correct Answer: unsteady flow
5. The volumetric efficiency for reciprocating air compressors is about
Options
A. 10 to 40%
B. 40 to 60%
C. 60 to 70%
D. 70 to 90%
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Correct Answer: 70 to 90%
6. The angle included between the two lips projected upon a plane parallel to the drill axis and paralled to the two cutting lips, is called helix angle.
Options
A. Correct
B. Incorrect
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Correct Answer: Incorrect
7. The increase in pressure in a roots blower is entirely due to back flow of air.
Options
A. Agree
B. Disagree
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Correct Answer: Agree
8. The power actually developed by the engine cylinder of an I.C. engine is known as
Options
A. theoretical power
B. actual power
C. indicated power
D. none of these
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Correct Answer: indicated power
9. The horizontal and non-uniformly spaced lines on a psychrometric chart indicates
Options
A. dry bulb temperature
B. wet bulb temperature
C. dew point temperature
D. specific humidity
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Correct Answer: dew point temperature
10. A Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is
Options
A. 0.26
B. 0.36
C. 0, 46
D. 0.56
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Correct Answer: 0, 46
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