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

GENERAL Learning Environment Category C (C, C1)
Question 114 of 533

Which of the following malfunctions of the cooling system leads to the premature deterioration of the engine?

A the deterioration of the water pump bearings;
B the clogging of the heating system;
C the blocking of the thermostat in the “open” position.
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Explanation

The blocking of the thermostat in the “open” position leads to the premature deterioration of the engine, because it keeps the operating temperature too low. In this situation, the coolant circulates continuously through the radiator, preventing the engine from reaching the optimal temperature. This affects fuel combustion, increases consumption and favours the deposits of residues inside the engine. Also, lubrication is compromised, because the oil does not reach the viscosity necessary for the protection of the components.

The correct answer is: C


Recommendations:
Mechanics course (knowledge of the main elements) --> Mechanics course

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