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Mechanical Engineering
Internal Combustion Engines (I.C. Engines)
Quiz 9
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Q.1
Number of working strokes per min. for a four stroke cycle engine are _________ the speed of the engine in r.p.m.
Equal to
One-half
Twice
Four-times
Q.2
Number of working strokes per min. for a two stroke cycle engine is _________ the speed of the engine in r.p.m.
Equal to
One-half
Twice
Four-times
Q.3
The thermodynamic cycle on which the petrol engine works, is
Otto cycle
Joule cycle
Rankine cycle
Stirling cycle
Q.4
The thermal efficiency of petrol and gas engines is about
15%
30%
50%
70%
Q.5
The thermal efficiency of diesel engines is about
15%
30%
50%
70%
Q.6
The size of inlet valve of an engine in comparison to exhaust valve is
More
Less
Same
More/less depending on capacity of engine
Q.7
A spark plug gap is kept from
0.3 to 0.7 mm
0.2 to 0.8 mm
0.4 to 0.9 mm
0.6 to 1.0 mm
0 h : 0 m : 1 s
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