Step 3 » GENERAL learning environment Category C (C, C1)

GENERAL Learning Environment Category C (C, C1)
Question 264 of 533

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

A the blocking of the thermostat in the “closed” position;
B the blocking of the thermostat in the “open” position;
C the use of an antifreeze recommended for temperatures below - 30 degrees C.

Explanation

Explanation text category C / driving tests drpciv:
Excessive cooling of the engine during operation may be due to the blocking of the thermostat in the “open” position. When the thermostat of the cooling system is blocked in the open position, the coolant will always circulate towards the radiator and will be constantly cooled, therefore the engine cannot reach the optimal temperature. The optimal temperature for the operation of the engine 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 tests drpciv category C explained.

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