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一、单项选择题(共 10 道试题,共 40 分。)
1. Compared with the fan on older vehicles, the advantage of the electric fan is that ( ).
A. there is no frictional power loss
B. there is no fan belts
C. it is driven by the camshaft
D. both A and B
满分:4 分
2. A valve opens and closes ( ) times per mile.
A. more than 2,000
B. less than 2,000
C. 2,000
D. 100,000
满分:4 分
3. The function of the primary windings is to ( ).
A. transmit the high voltage from the coil to the spark plug.
B. capture the voltage
C. produce a magnetic field
D. change the electrical energy into a magnetic field
满分:4 分
4. There are two basic types of engine valves ).
A. the intake valve and the inlet valve
B. the intake valve and the inlet valve
C. the output valve and the inlet valve
D. the exhaust valve and the output valve
满分:4 分
5. What type of material used is determined exactly by ( ).
A. the stress
B. load temperature
C. aging qualities
D. all of the above
满分:4 分
6. The purpose of valve springs is to ( ).
A. keep valves close when the camshaft is not lifting the valve.
B. keep valves open
C. keep valve float
D. keep valves bounce
满分:4 分
7. The spark ignition engine can change the ( ) contained in fuel into kinetic energy.
A. chemical energy
B. physical energy
C. electrical energy
D. solar energy
满分:4 分
8. According to the location of the camshaft, the valve trains are divided into overhead camshaft type and ( ).
A. valve seat
B. valve guid type
C. side camshaft type
D. intake valve and exhaust
满分:4 分
9. Within the gasoline or the diesel engine, about ( ) of the energy is used to drive the vehicle.
A. 25%
B. 33%
C. 9%
D.
all of the above
满分:4 分
10. The theoretical ideal for complete combustion is a mass ratio of ( ).
A. 1:14.7
B. 14:1.7
C. 7:14.1
D. 14.7:1
满分:4 分
二、判断题(共 15 道试题,共 60 分。)
1. electronic ignition system 意思是电子点火系统
A. 错误
B. 正确
满分:4 分
2. electronic injection system 意思是机械燃油喷射系统
A. 错误
B. 正确
满分:4 分
3. timing advanced 意思是正时延迟
A. 错误
B. 正确
满分:4 分
4. oil sensor 意思是机油冷却器
A. 错误
B. 正确
满分:4 分
5. clutch pedal 意思是离合器踏板
A. 错误
B. 正确
满分:4 分
6. nonchargeable 意思是不可在充电的
A. 错误
B. 正确
满分:4 分
7. cold starting 意思是热启动
A. 错误
B. 正确
满分:4 分
8. exhaust gas turbochargers 意思是废气涡轮增压器
A. 错误
B. 正确
满分:4 分
9. muffler 意思是消声器
A. 错误
B. 正确
满分:4 分
10. air-cooling system 意思是空气冷却系统
A. 错误
B. 正确
满分:4 分
11. oil bath air filter 意思是干式空气滤清器
A. 错误
B. 正确
满分:4 分
12. inertia engaged motor 意思是预啮合电机
A. 错误
B. 正确
满分:4 分
13. secondary winding 意思是初级线圈
A. 错误
B. 正确
满分:4 分
14. dashboard 意思是仪表板
A. 错误
B. 正确
满分:4 分
15. pressure regulator 意思是调压器
A. 错误
B. 正确
满分:4 分
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