What function in a diesel engine does a glow plug perform?
Show the correct answer
Correct answer
A. It makes the start of a cold engine easier.
Explanation
The question is about the function of a glow plug in a diesel engine. It makes it easier to start a cold engine - answer A.
The Road Traffic Act requires a vehicle to be maintained so that using it does not endanger safety. In a diesel engine, the fuel ignites from hot, compressed air - when the engine is cold, the air does not heat up enough, and starting is difficult. The glow plug heats up before the engine is started and warms the combustion chamber or the air, so the fuel ignites more easily. The glow plug warning light on the dashboard goes out when you can turn the key. The glow plug does not heat the fuel in the tank (answer B) or the coolant (answer C) - other devices are used for this, for example a parking heater.
Legal basis: Art. 66 para. 1 point 1 of the Road Traffic Act (Prawo o ruchu drogowym)