Step 3 » GENERAL learning environment Category D (D, D1, Tb, Tv)

GENERAL Learning Environment Category D (D, D1, Tb, Tv)
Question 275 of 485

Excessive cooling of the engine during operation can be due to:

A the thermostat being stuck in the “closed” position;
B the thermostat being stuck in the “open” position;
C using an antifreeze liquid recommended for temperatures below -30 degrees C.

Explanation

Explanation text category D / driving quizzes drpciv:
Excessive cooling of the engine during operation can be due to the thermostat being stuck in the “open” position. When the thermostat of the cooling system gets stuck in the open position, the coolant will always circulate towards the radiator and will be cooled continuously, therefore the engine cannot reach the optimal temperature. The optimal temperature for the engine to operate is between 80-90 degrees Celsius, if driving with a defective thermostat, the coolant having a temperature below the optimal one, the fuel consumption will increase.
Correct answer: B
 
Driving quizzes drpciv category D explained.

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