113. Ignition lag is
A.The time taken by fuel after injection (before top dead centre) to reach upto auto-ignition temperature
B.Time before actual fuel injection and the pump plunger starts to pump fuel
C.Time corresponding to actual injection and top dead centre
D.Time corresponding to actual ignition and top dead centre

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114. The spark plug gap is normally maintained at
A.0.1 to 0.2 mm
B.0.2 to 0.4 mm
C.0.45 to 0.6 mm
D.0.6 to 0.8 mm

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115. The function of a fuel pump in a petrol pump is to
A.Inject fuel in cylinder
B.Supply fuel when carburettor fails
C.Pump fuel so that it reaches carburetor
D.Improve thermal efficiency

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116. The delay period in petrol engine is of the order of
A.0.001 sec
B.0.002 sce
C.0.01 sec
D.0.05 sec

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117. Detonation is caused by the following unstable compounds
A.Peroxides, aldehydes and ketones
B.Peroxides, aldehydes, oxides and sulphides
C.Aldehydes, oxides and ketones
D.Ketones and sulphur compounds

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118. If overhead clearance is less, then the following type of engine should be selected
A.V-type
B.In-line
C.Vertical
D.Horizontal

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119. Which is false statement about advantages of V-type engine
A.Compact design requiring lesser space
B.Less overhead clearance
C.Casting less liable to distortion
D.Reduced torsional vibration because of shorter crankshaft

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