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Internal Combustion Engines

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

50
120
100
0

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Internal Combustion Engines
The theoretically correct mixture of air and petrol is

15 : 1
25 : 1
10 : 1
20 : 1

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Internal Combustion Engines
The knocking tendency in spark ignition engines may be decreased by

Controlling the air-fuel mixture
Controlling the ignition timing
Reducing the compression ratio
Controlling the exhaust temperature

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Internal Combustion Engines
If the ratios of all the corresponding linear dimensions are equal, then the model and the prototype are said to have

Dynamic similarity
Geometric similarity
Kinematic similarity
None of these

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Internal Combustion Engines
The cetane number of diesel oil, generally available, is

40 to 55
25 to 30
20 to 25
30 to 40

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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

0.50069444444444
0.37569444444444
0.62569444444444
0.75069444444444

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