海船船员考试
单选题Because of the high loads the bearing material is a tin- aluminum alloy bonded to a steel shellThe crosshead pin is highly polished to a （）.A flat surfaceB mirror finishC sloping surfaceD inclined surface
题目
flat surface
mirror finish
sloping surface
inclined surface
相似问题和答案
第1题：
Because of the high loads the bearing material is a tin-aluminum(锡-铝) alloy bonded to a steel shell. The crosshead pin is highly polished to a______.
A.flat surface
B.mirror finish
C.sloping(倾斜的) surface
D.inclined(倾向的) surface
第2题：
The population decreased from the 1840s until about 1970,largely because of（）.
Aa low birth rate
Ba high death rate
Ca low employment rate
Da high emigration rate
D
略
第3题：
The machine has stopped rotating because the bearing _____ the shaft.
A.seized
B.clogged
C.melted
D.inserted
第4题：
on the high side
out of line with
are running high
be too high
第5题：
through bolts
jack bolts
tap bolts
fitted bolts
第6题：
B.articles of value
C.difficult things to obtain
D.material objects
第7题：
Our clients asked us to bring down our prices because they consider them（）.
- A、on the high side
- B、out of line with
- C、are running high
- D、be too high
正确答案:A
第8题：
To reduce the weight of the reciprocating parts, pistons of high-speed engines are made considerably shorterThis results in __________.
A.less piston slap and quieter running
B.increased crankshaft bearing wear
C.slightly greater piston wear
D.decreased side pressures
第9题：
less piston slap and quieter running
increased crankshaft bearing wear
slightly greater piston wear
decreased side pressures
第10题：
the bearing near to the diesel engine
the intermediate bearing near to the thrust bearing
the intermediate bearing near to the sterntube
the bearing located at the middle of the diesel engine and the sterntube