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Mechanical Engineering - IC Engines and Nuclear Power Plants

Exercise : IC Engines and Nuclear Power Plants - Section 1
11.
The brake power of a diesel engine, keeping other parameters constant, can be increased by
decreasing the density of intake air
increasing the temperature of intake air
increasing the pressure of intake air
decreasing the pressure of intake air
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
In diesel engines, the fuel is injected in the form of very fine spray, into the engine cylinder, which gets ignited due to high temperature of the compressed air.
Agree
Disagree
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
Pre-ignition is caused by the spontantaneous combustion of the mixture before the end of the compression stroke, and is due to
cylinder walls being too hot
overheated spark plug points
red hot carbon deposits on cylinder walls
any one of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
The expansion of fuel in a four stroke cycle diesel engine
starts at 15° before top dead centre and ends at 30° after top dead centre
starts at top dead centre and ends at 30° after top dead centre
starts at 15° after top dead centre and ends at 30° before bottom dead centre
may start and end anywhere
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
The object of supercharging the engine is
to reduce mass ofthe engine per brake power
to reduce space occupied by the engine
to increase the power output of an engine when greater power is required
all ofthe above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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