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Internal Combustion Engines

Internal Combustion Engines
A mixture containing 65% of iso-octane and 35% of normal heptane will have

Cetane number 35
Octane number 35
Octane number 65
Cetane number 65

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Internal Combustion Engines
The increase in intake temperature of internal combustion engines will ___ efficiency.

Have no effect on
Increase
None of the listed here
Decrease

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Internal Combustion Engines
The pressure and temperature at the end of compression stroke in a petrol engine are of the order of

4-6 kg/cm² and 200-250°C
12-20 kg/cm² and 350-450°C
6-12 kg/cm² and 250-350°C
20-30 kg/cm² and 450-500°C

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Internal Combustion Engines
The size of inlet valve of an engine in comparison to exhaust valve is

More/less depending on capacity of engine
More
Less
Same

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Internal Combustion Engines
Diesel engine can work on very lean air fuel ratio of the order of 30: 1. A petrol engine can also work on such a lean ratio provided

Flywheel size is proper
Cannot work as it is impossible
Best quality fuel is used
It is properly designed

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Internal Combustion Engines
The term scavenging is generally associated with

High efficiency engines
2-stroke cycle engines
4-stroke cycle engines
Aeroplane engines

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MORE MCQ ON Internal Combustion Engines

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