海船船员考试
单选题The （） stage air compressors are widely used on board the ship.A singleB ⅡC ⅢD multiple
题目
single
Ⅱ
Ⅲ
multiple
相似问题和答案
第1题：
_____ are widely used in the current world.
A、The computers
B、Computers
C、A computer
D、An computer
第2题：
Compressed air is supplied by air compressors to______.
A.the air receivers
B.the starting valves
C.the cylinder covers
D.the distributors
第3题：
Regional dialects are used most widely in a community.()
第4题：
second stage cylinder lockup
oil sump contamination
faulty operation of pneumatic valves
corrosion of air receiver baffles
第5题：
starting air bottles
diesel engines
boilers
refrigeration compressors
第6题：
what is “board sling” used for?
第7题：
B.dependable
C.depending
D.depend
第8题：
A.used to
B.be used to learn
C.get used to
D.be used as
第9题：
rotary compressors
reciprocating compressors
centrifugal compressors
screw compressors
第10题：
the cooling effect of the condensate reduces the compressors efficiency
a danger of explosion exists whenever water is present in a compressor
water causes erratic operation of pneumatic components
the volumetric capacity of the first stage is reduced if water remains