[A]. to reduce mass ofthe engine per brake power
[B]. to reduce space occupied by the engine
[C]. to increase the power output of an engine when greater power is required
[D]. all ofthe above
✅ The correct answer is option D.
IC Engines and Nuclear Power Plants MCQs
U233 is produced
[A]. artificially
[B]. as basic raw material
[C]. when thorium is irradiated by neutrons
[D]. by fission of U238
✅ The correct answer is option C.
In a four stroke cycle petrol engine, the charge is compressed when both the valves (i.e. inlet valve and exit valve) are closed,
[A]. Agree
[B]. Disagree
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✅ The correct answer is option A.
The thermal efficiency of diesel engines is about
[A]. 15%
[B]. 30%
[C]. 50%
[D]. 70%
✅ The correct answer is option D.
The predominent isotope of the naturally occuring element is
[A]. U235
[B]. U238
[C]. Pu233
[D]. Pu239
✅ The correct answer is option B.
The primary fuel used in nuclear power plants is
[A]. U235
[B]. U238
[C]. Pu239
[D]. Pu233
✅ The correct answer is option A.
The detonating tendency in petrol engines increases with increase of compression ratio.
[A]. True
[B]. False
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✅ The correct answer is option A.
The injection pressure in a diesel engine is about
[A]. 10 bar
[B]. 100 bar
[C]. 150 bar
[D]. 500 bar
✅ The correct answer is option B.
A carburettor is used to supply
[A]. petrol, air and lubricating oil
[B]. air and diesel
[C]. petrol and lubricating oil
[D]. petrol and air
✅ The correct answer is option D.
The detonation is also called knocking or pinking.
[A]. Yes
[B]. No
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✅ The correct answer is option A.