Step 3 » GENERAL learning environment Category D (D, D1, Tb, Tv)

GENERAL Learning Environment Category D (D, D1, Tb, Tv)
Question 91 of 485

The exhaust brake fulfills the following functions:

A keeps the engine starting temperature and ventilates the muffler;
B keeps the engine warm at idle and performs the engine brake;
C helps to retain the noxes from the exhaust gases.

Explanation

Explanation text category D / driving tests drpciv:
Buses and heavy trucks have, besides the wheel brake, other deceleration devices. The exhaust brake (the engine brake) is a decelerator that interrupts the diesel supply and obstructs the exhaust gases. The electromagnetic brake is a decelerator that brakes the cardan shaft (the transmission), with the help of an electromagnet.
Therefore the exhaust brake keeps the engine warm at idle and performs the engine brake.
Correct answer: B
 
Driving tests drpciv category D explained.

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