Practice question

Why is it dangerous to put the transmission in neutral (coasting) when driving a heavy truck down a long hill?

It causes the diesel engine to overheat
The driver loses engine compression braking, and the vehicle can quickly gain uncontrollable speed
It will damage the air compressor drive belt
It will activate the trailer emergency brakes automatically

Answer: B — The driver loses engine compression braking, and the vehicle can quickly gain uncontrollable speed

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