Q13: Paraffins have molecular structure of
A)chain saturated
B)chain unsaturated
C)ring
Q14: Hydrocarbons are decomposed into smaller hydrocarbons by
A)reforming
B)refining
C)cracking
D)polymerization
Q15: The molecular structure of the straight-run gasoline
Q16: For SI engines fuels most preferred are
A)aromatics
B)parafins
C)olefins
D)napthenes
Q17: For CI engine fuels most preferred are
A)napthenes
B)paraffins
C)olefins
D)aromatics
Q19: Ignition quality of diesel fuel is indicated
Q20: Flash point of fuel oil is
A)minimum temperature
Q21: Gasohol is a mixture of
A)90% ethanol +
Q22: Stoichiometric air-fuel ratio of petrol is roughly
A)50:1
B)25:1
C)15:1
D)1:1
Q23: Venturi in the carburetor results in
A)decrease of
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