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Internal Combustion Engines

Internal Combustion Engines
Gaseous fuel guarantees are based on

Calorific value of oil
Mean heat value of oil
High heat value of oil
Low heat value of oil

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

Increase
None of the listed here
Decrease
Not effect

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Internal Combustion Engines
A petrol engine has compression ratio from

15 to 25
10 to 15
6 to 10
25 to 40

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Internal Combustion Engines
Which is more viscous lube oil?

SAE 70
SAE 80
SAE 50
SEA 30

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Internal Combustion Engines
The brake power of a diesel engine, keeping other parameters constant, can be increased by

Decreasing the density of intake air
Decreasing the pressure of intake air
Increasing the temperature of intake air
Increasing the pressure of intake air

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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
0.62569444444444
0.37569444444444
0.75069444444444

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