70.

71.

72.

73.

74,

76.

Which circuit the ballast resistor is used ?
(^) Horn circuit (B) Wiper circuit
(C) Flasher circuit (D) Headlamp circuit

Which of the following is true about the thermodynamic cycle of a diesel engine ?
(A) Constant volume cycle (B) Constant pressure cycle
(C) Atkinson cycle (D) None of these

What is the range of compression pressure of a typical petrol engine ?
(A) 9080 15051 (8) 400 ‏مغ‎ 550 251 (0) 500to700PSI (0) None of these

Which of the following is false about engine cooling system ?

(A) Radiator pressure cap consists of a pressure valve which opens up when the
pressure exceeds a pre-set value.

(B) Vacuum valve on radiator pressure cap opens up to let the coolant in while the
engine cools down.

(C) ECM calculates coolant temperature value from the ECT sensor output.

(D) Engine overheats if the thermostat valve is stuck open.

In which of the following types of oil pumps does not use eccentric shafts or cams ?
(A) External gear type pump (B) Rotor type pump
(C) Vane type pump (D) Plunger type pump

Which of the following statements is false about lubrication system ?

(A) Oil cooler heats the oil when coolant temperature is greater than oil temperature.
(B) All the oil reaching main oil gallery is filtered in Bypass oil filter system.

(C) Dry sump lubrication system uses a separate tank to store oil.

(D) Lubricant also helps in preventing blow by gases entering crankcase.

Which of the following is false about fuel system ?
(^) Air locking in the diesel fuel system will cause erratic running of engine.
(B) Water in fuel system might damage fuel injectors.

(0) An engine can be started without the signal from Crank position sensor (CKP)
input.

(D) Injection pressure in CRDi engines vary from 200 to 2000 bars.

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