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

GENERAL Learning Environment Category D (D, D1, Tb, Tv)
Question 441 of 485

How can you use under optimal conditions the capacity of braking of the engine, when you descend a long and steep slope?

A you shift into an upper gear;
B you shift in time into a lower gear;
C after changing the speed, you bring immediately the lever to “neutral”.

Explanation

When you descend a long and steep slope, in order to be able to use under optimal conditions the capacity of braking of the engine, you must shift in time into a lower speed gear. Thus you will benefit from the engine brake and you will significantly reduce the wear of the braking system (the foot brake).

When you descend a long and steep slope using the service brake (the foot brake) we will keep the brake pedal pressed for a relatively long period of time. That means that the braking system will work for a long time, trying to reduce the driving speed of the car. Thus the contact surface between pads and disc will overheat and the degree of grip between the two surfaces will decrease. All these leading to a low efficiency of the braking system caused by overheating. This phenomenon is called “fatigue of the braking system”.

The correct answer is: B


Recommendations:
Mechanics course (knowledge of the main elements) --> Mechanics course
Ecological driving course --> Ecological driving course

Reference articles

For answer  A 

The road legislation does not provide anything in this regard.


For answer  B 

The road legislation does not provide anything in this regard.


For answer  C 

Regulation** - Article 148

Is prohibited the driver of motor vehicle, agricultural or forestry tractor or tram:
[...]
12. to leave free during driving the steering wheel, the handlebar or the control lever, to stop the engine or to disengage the transmission during driving;
[...]


** Regulation = REGULATION for the implementation of OUG 195/2002 updated (the Road Traffic Code Regulation)

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