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In which types of cooling system the rate of cooling is very low ?
A) Thermo siphon system

B) Air cooling system
C) Forced feed system
D) Pump circulation system

Engine overheating may result due to
A) Radiator pressure cap stuck closed
B) Excess coolant in the system

C) Thermostat stuck open

D) Broken fan belt

What is the cause of water leakage in water pump ?

A) Worn out bearing B) Worn out shaft

C) Worn out seal D) Worn out impeller
What is the reason if oil pump does not suck the oil ?

A) Filter clogged B) Relief valve struck

C) More backlash D) Less radial clearance
The friction that occurs between the layers of oil in an oil film is called
A) Solid friction B) Viscous friction

C) Boundary friction D) Greasy friction

High oil pressure in a lubrication system is caused due to
A) Incorrect adjustment of relief valve

B) Low amount of engine oil in sump

C) Low suction effect in suction pipe

D) Broken relief valve spring

Which part is lubricated by splash lubrication system ?
A) Timing gears B) Main journal
C) Crank pin D) Cylinder wall

Which type of the emission control system that blow by gases are feed into the
inlet manifold of a running engine ?

A) Exhaust gas recirculation B) Crank case ventilation

C) Positive crank case ventilation D) Catalytic convention

Excessive oil consumption may be caused by all of these problems except
A) Worn rocker arms B) Worn valve guides
C) Worn piston rings D) Scored cylinder walls