A.air
B.moisture
C.cooling water
D.lubricant
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A.drained off
B.collected
C.sent to the crankcases
D.separated with oil
A.rotary compressors
B.reciprocating compressors
C.centrifugal compressors
D.screw compressors
A.starting diesel engines
B.pneumatic control systems
C.pneumatic tools
D.supercharging air
A.globe valves
B.butterfly valves
C.gate valves
D.reducing valves
A.a sewage treatment plant
B.the extended aeration process
C.the liquor
D.the bubbling air
最新試題
Flame failure in an automatically fired auxiliary boiler can from a/an （）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
The treatment of the fuel oils involves storage, heating, filtering and（）
The condensers located in various stages of a flash evaporator are cooled by（）
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
Which of the following items don’t belong to dock repair works?（）