How should you increase speed when driving a bus, if you want to drive economically?
Show the correct answer
Correct answer
A. So choosing the gear that the tachometer needle remains within the green area.
Explanation
The question is about increasing the speed of a bus economically. You choose the gear so that, after changing up to a higher gear, the rev counter needle does not drop below the green area - answer A.
The Road Traffic Act prohibits the driver from using a vehicle in a way that causes nuisance through excessive exhaust emissions or excessive noise. The green area of the rev counter shows the range in which the engine gives the most pulling power with the lowest fuel consumption. You change gear so that after shifting to a higher gear the revs stay in this area - the bus accelerates smoothly, and passengers do not feel any jerks. Reaching the maximum speed in each gear (answer B) and changing gear only at maximum revs (answer C) mean high fuel consumption, noise and faster engine wear.
Legal basis: Art. 60 para. 2 point 2 of the Road Traffic Act (Prawo o ruchu drogowym)