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Automobile Engineering
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Question
In a ventilated disc brake,
Options
A. a duct directs air towards the caliper for cooling while the vehicle is moving
B. caliper is covered with cooling fins
C. disc contains many small holes for optimum cooling performance
D. disc contains radial vanes between its rubbing surfaces for optimum cooling performance
Correct Answer
disc contains radial vanes between its rubbing surfaces for optimum cooling performance
More questions
1. The function of an oil control orifice is that it
Options
A. returns cylinder head lubricating oil to the oil pan at high speed
B. turns oil into fine mist for spray lubrication
C. regulates the pressure of engine oil supplied by the oil pump for the lubrication of cylinder head mechanism and other purposes
D. removes impurities from cylinder head lubricating oil
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Correct Answer: regulates the pressure of engine oil supplied by the oil pump for the lubrication of cylinder head mechanism and other purposes
2. The missing quantity per stroke is equal to
Options
A. cylinder feed - indicated mass of steam
B. cylinder feed + indicated mass of steam
C. mass of cushion steam + indicated mass of steam
D. mass of cushion steam + cylinder feed
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Correct Answer: cylinder feed - indicated mass of steam
3. Quenching is not necessary when hardening is done by
Options
A. case hardening
B. flame hardening
C. nitriding
D. any one of these
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Correct Answer: nitriding
4. The term 'force' may be defined as an agent which produces or tends to produce, destroys or tends to destroy motion.
Options
A. Agree
B. Disagree
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Correct Answer: Agree
5. Nodular cast iron is produced by adding __________ to the molten cast iron.
Options
A. nickel
B. chromium
C. copper
D. magnesium
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Correct Answer: magnesium
6. Which of the following statement is correct as regard to centrifugal compressors?
Options
A. The flow of air is parallel to the axis of the compressor.
B. The static pressure of air in the impeller increases in order to provide centripetal force on the air.
C. The impeller rotates at high speeds.
D. The maximum efficiency is higher than multi-stage axial flow compressors.
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Correct Answer: The static pressure of air in the impeller increases in order to provide centripetal force on the air.
7. Parallel fillet welds are designed for bending strength.
Options
A. Agree
B. Disagree
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Correct Answer: Agree
8. When the dimension is expressed as
, then the basic size is
Options
A. 20 mm
B. 20.035 mm
C. 20.025 mm
D. 19.975 mm
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Correct Answer: 20 mm
9. The temperature required for full annealing in hyper-eutectoid steel is
Options
A. 30° C to 50° C above upper critical temperature
B. 30° C to 50° C below upper critical temperature
C. 30° C to 50° C above lower critical temperature
D. 30° C to 50° C below lower critical temperature
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Correct Answer: 30° C to 50° C above lower critical temperature
10. The wet bulb depression is zero when relative humidity is
Options
A. zero
B. 0.5
C. 0.75
D. 1.0
Show Answer
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Correct Answer: 1.0
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