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Internal Combustion Engines

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

120
50
100
0

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Internal Combustion Engines
The air standard efficiency of an I.C. engine is given by (where r = Compression ratio, and γ = Ratio of specific heats)

None of these
1 - rγ - 1
1 - (1/rγ - 1)
1 + rγ - 1

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Internal Combustion Engines
Air fuel ratio at which a petrol engine cannot work is

0.62569444444444
20 : 1 and less
0.33402777777778
0.41736111111111

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Internal Combustion Engines
A 75 cc engine has following parameter as 75 cc

Cylinder volume
Swept volume
Fuel tank capacity
Lube oil capacity

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Internal Combustion Engines
A petrol engine has compression ratio from

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

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Internal Combustion Engines
Engine pistons are usually made of aluminium alloy because it

Is stronger
Wear is less
Is lighter
Absorbs shocks

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