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

GENERAL Learning Environment Category D (D, D1, Tb, Tv)
Question 219 of 485

The retarder on the exhaust allows the use of the engine as a compressor, interrupting:

A the safety braking;
B the service braking;
C the fuel injection, also obstructing the exhaust gas outlet.

Explanation

Explanation text category D / driving tests drpciv:
Buses and heavy trucks have, besides the wheel brake, other slowing devices. The exhaust brake (the engine brake) is a retarder that interrupts the fuel supply and obstructs the exhaust gases. The electromagnetic brake is a retarder that brakes the cardan shaft (the transmission), with the help of an electromagnet.
Therefore the retarder on the exhaust allows the use of the engine as a compressor, interrupting the fuel injection, also obstructing the exhaust gas outlet.
Correct answer: C
 
Driving tests drpciv category D explained.

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