Question63:-Mechanic A says some piston rings control blowby. Mechanics B says some piston rings control oil. Who is right ?
‘Ac Only Mechanic A
B:-Only Mechanic B
CeBoth Mechanic A and B
D-Neither Mechanic A nor B
Correct Answer:- Option-C
Question64::Which one of the following is most commonly used Antifreeze solution ?
‘Ac Ethylene Glycol
B:-Mineral oil
Straight vegetable oil
De-Lactic Acid
Correct Answer:- Option-é
Question65::Which one of the following device prevents the circulation of water in the cooling system so as to allow faster warm-up of the engine ?
‘AcRelief Valve
220
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‎7
‎Correct Answer:- Option-C
Question66:-Cadmium Testis performed to know
‘AcBattery cell condition
B:-Chemical condition of battery plates
C-Amount of electrolyte present in the battery
D:-The state of charge of battery
Correct Answer:- Option ®
Question67:-During discharging process of Battery.
i. Both of the plates are covered with PSO,
ii. Specific gravity of electrolyte falls due to formation of water during reaction at १80:
plate.
ili, The terminal voltage increases
Which of the statements given above is/are correct ?
‘Ac Only statements ii and il are correct
B:-Only statements i and liare correct
C-Only statements i and ii are correct
D-All statements i, i! and iiiare correct
Correct Answer:- Option ®
न rate at which a battery can produce current is determined by the speed of the chemical reaction. This in tum is determined by which of the following factors
i. Current demanded.
ii Electrolyte strength.

ii, Temperature.
iv. Surface area of the plates.

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B:-Only i and i
C-Only i ii and i
D-All of the above (ii, iii and iv)
Correct Answer:- Option-D
Question69:-Cutout Relay in vehicle is used
‘Ato prevent battery from being overcharged while engine is in turned on condition
Bs-to prevent battery from being undercharged during engine operation
C=to prevent battery from being discharged while engine is in turned off condition
D-none of the above
Correct Answer:- Option-C
Question70:-Motor Locked Torque is
‘Acthe torque of the motor when the armature shaft pinion gear is driving the flywheel gearing

Bothe torque developed immediately the battery current is switched on as the armature start rotating from rest