单轴系的特点是（）。Ⅰ.直接传动；Ⅱ.结构简单可靠；Ⅲ.便于操纵；

【名词&注释】

填料函(stuffing box)、尼龙绳(nylon)

[单选题]单轴系的特点是（）。Ⅰ.直接传动；Ⅱ.结构简单可靠；Ⅲ.便于操纵；Ⅳ.便于维护管理；Ⅴ.建造费用低。

A. Ⅱ＋Ⅲ
B. Ⅰ＋Ⅱ
C. Ⅰ＋Ⅱ＋Ⅲ＋Ⅳ＋Ⅴ
D. Ⅰ＋Ⅱ＋Ⅲ＋Ⅳ

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学习资料：

[单选题]水润滑艉轴承填料函中的填料为（）。

A. 棉、麻绳
B. 尼龙绳
C. 浸油布条
D. 浸油脂棉、麻绳或尼龙绳

[单选题]（） is the removal of exhaust gases by blowing in fresh air.

A. Gas exchange
B. Charging
C. Scavenging
D. Supercharging

[单选题]In each cylinder cover there are two or three holes for （）

A. the exhaust valves
B. the fuel valves
C. indicator cocks
D. the fuel pum

[单选题]Valve gear knocks are more easily located while the engine （）.

A. is running
B. stops
C. is repaired
D. lacks of oil

[单选题]Vee-type engines have the connecting rods from two cylinders connected to each （） of the crankshaft.

A. throw
B. web
C. main bearing
D. deflectio

[单选题]When the prime movers of two paralleled generators are equipped with mechanical- hydraulic governors, and are operating within their designed range, the unit with the least amount of speed droop will （）.

A. pick up more of any increase in load
B. pick up less of any increase in load
C. share an equal amount of any increase in load
D. drop an equal amount of any decrease in load

[单选题]High firing pressures and a low exhaust temperature in a diesel engine may result from （）.

A. decreased piston to cylinder head clearance
B. increased exhaust system back pressure
C. early fuel injection timing
D. low scavenge air temperature

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