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Internal Combustion Engines

Internal Combustion Engines
The working pressure and temperature inside the cylinder of an internal combustion engine is _________ as compared to a steam engine.

Very low
Very high
High
Low

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Internal Combustion Engines
The inlet valve of a four stroke cycle internal combustion engine remains open for

230°
180°
270°
130°

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Internal Combustion Engines
Alpha-methyl-naphthalene (C₁₁ H₁₀) has a cetane number of

100
0
120
50

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Internal Combustion Engines
In order to eliminate knocking in compression ignition engines, there should be

Short delay period
Low compression ratio
High self ignition temperature of fuel
Late auto-ignition

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Internal Combustion Engines
The correct mixture strength (by weight) for petrol is about

18.5 : 1
22.6 : 1
20.4 : 1
14.6 : 1

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Internal Combustion Engines
Which is more viscous lube oil?

SAE 70
SEA 30
SAE 80
SAE 50

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