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Internal Combustion Engines

Internal Combustion Engines
Combustion in compression ignition engines is

Homogeneous
Both (A) and (B)
Laminar
Heterogeneous

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Internal Combustion Engines
In petrol engines, advancing of the spark timing will ___ the knocking tendency.

Increase
Not effect
None of the listed here
Decrease

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Internal Combustion Engines
Air fuel ratio at which a petrol engine cannot work is

0.41736111111111
0.62569444444444
20 : 1 and less
0.33402777777778

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Internal Combustion Engines
Polymerization is a chemical process in which molecules of a compound become

Liquid
Larger
Slowed down
Smaller

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Internal Combustion Engines
The thermal efficiency of diesel engines is about

0.15
0.7
0.5
0.3

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Internal Combustion Engines
For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of

0.75069444444444
0.37569444444444
0.50069444444444
0.62569444444444

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