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Internal Combustion Engines

Internal Combustion Engines
Diesel as compared to petrol is

None of these
Highly ignitable
More difficult to ignite
Less difficult to ignite

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Internal Combustion Engines
Number of working strokes per min. for a two stroke cycle engine is ____ the speed of the engine in r.p.m.

One-half
Four-times
Twice
Equal to

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Internal Combustion Engines
The thermal efficiency of diesel engines on weak mixtures is

Unaffected
Dependent on other factors
Lower
Higher

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Internal Combustion Engines
The thermal efficiency of diesel engines is about

0.3
0.15
0.5
0.7

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Internal Combustion Engines
Which of the following is false statement?

Piston ring and cylinder wear
Formation of hard coating on piston skirts
Oil sludge in the engine crank case
Detonation

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Internal Combustion Engines
Alpha-methyl-naphthalene (C11H10) has a cetane number of

0
50
120
100

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