Control & OperationCâu 64 / 120
How do you know when to shift using engine speed?
a.Shift whenever the vehicle feels slow
b.Shift at the same road speed in every gear
c.Shift only when the engine stalls
d.Learn the operating rpm range for your engine and shift up when the tachometer reaches the top of that range
Giải thích
Each engine has a recommended rpm operating range, and the tachometer tells you when the engine has reached the point to shift. Guessing by feel, using a fixed road speed for all gears, or waiting for a stall wastes fuel and can over-rev or lug the engine.
Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Which sequence describes double clutching to shift into a higher gear?
- When downshifting, what do you do differently compared with upshifting?
- You are approaching a steep downgrade in a truck with a manual transmission. When should you select your gear?
- You need to back into a tight dock space and you have a choice of approach. What should you do?
- What does the safe-backing practice known as GOAL stand for and require?
- You are backing a trailer and it begins to drift off your intended line. What is the correct correction?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với Commercial Driver's License (CDL) General Knowledge Test · Quy trình kiểm tra