What may be the effect of too low level of the cooling liquid in the combustion engine?
Show the correct answer
Correct answer
C. An increase in the temperature of the engine.
Explanation
In the photo you can see a coolant expansion tank with a cap and a minimum level mark. Too low a coolant level may cause the engine temperature to rise - answer C.
The Road Traffic Act requires a vehicle to be maintained in a condition that does not endanger safety. Coolant circulates between the engine block and the radiator and takes away the heat from combustion; when there is too little of it, air locks form in the system, circulation stops working properly and the engine temperature rises, until the coolant boils and the cylinder head gasket is damaged. Answers A and B are the opposite of the truth: the temperature does not fall, and an overheated engine uses more fuel, not less. The expansion tank has minimum and maximum level marks - you check it with the engine cold, because a hot system is under pressure and unscrewing the cap can cause burns. A regular loss of coolant means a leak that must be found, rather than just topping up the level.
Legal basis: Art. 66 para. 1 point 1 of the Road Traffic Act (Prawo o ruchu drogowym)