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輪機英語單項選擇題每日一練(2019.08.18)

單項選擇題
It has something （） with poor workmanship and assembly, doesn’t it?
A.do
B.to do
C.done
D.doing
單項選擇題
（） are more suitable for large quantities at low pressure.
A.Reciprocating pumps
B.Rotary pumps
C.Centrifugal pumps
D.Gear pumps
單項選擇題
At an unsheltered anchorage the chief engineer officer shall consult with the master whetheror not to maintain an underway watch“An underway watch” means（）
A.a watch which is kept with lower standard
B.a watch which is kept when the ship isnt sailing
C.a watch which is kept when the ship is sailing
D.a watch which is kept when the ship is in a restricted visibility area
單項選擇題
To maintain design discharge pressure from a centrifugal pump, the design clearance must be maintained between the （）.
A.shaft and impeller
B.motor and pump shaft
C.casing and impeller wearing rings
D.lantern ring and impeller
單項選擇題
A large, low-speed, main propulsion diesel engine uses sea water to directly cool the （）.
A.cylinder heads
B.exhaust valves
C.scavenging air
D.injectors

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