Practice question

What is the critical danger of depressing the clutch pedal or shifting into neutral when driving a loaded tractor and trailer down a steep hill?

The hydraulic steering assistance fails immediately
The trailer's overrun brake engages permanently
You lose all engine braking (Motorbremswirkung), so the combination accelerates and the service brakes overheat and fade
The differential lock disengages automatically

Answer: C — You lose all engine braking (Motorbremswirkung), so the combination accelerates and the service brakes overheat and fade

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