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Internal Combustion Engines

Internal Combustion Engines
Which is more viscous lube oil?

SAE 80
SAE 50
SEA 30
SAE 70

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Internal Combustion Engines
A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of

75% iso-octane and 25% normal heptane
75% petrol and 25% diesel
75% diesel and 25% petrol
75% normal heptane and 25% iso-octane

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Internal Combustion Engines
The thermodynamic cycle on which the petrol engine works, is

Rankine cycle
Joule cycle
Stirling cycle
Otto cycle

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

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

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Internal Combustion Engines
Theoretically, a four stroke cycle engine should develop _________ power as that of a two stroke cycle engine.

Half
Four times
Double
Same

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Internal Combustion Engines
The thermal efficiency of a petrol engine is _________ as compared to diesel engine.

More
Less
Same
None of these

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