Control & OperationCâu 74 / 120
You are parking on a slight grade and will leave the vehicle. What should you do?
a.Leave the engine running so the air system stays charged
b.Leave the transmission in a low gear with the brakes released
c.Shut the engine off, apply the parking brakes, and chock the wheels if the vehicle may roll
d.Rely on the service brakes alone
Giải thích
Parking brakes plus chocks are what hold a heavy vehicle on a grade once the driver leaves. Service brakes bleed off as air pressure drops, and leaving the engine running or the brakes released allows the vehicle to move.
Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
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