A.rotary compressors
B.reciprocating compressors
C.centrifugal compressors
D.screw compressors
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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
A.in boiler drums
B.in refrigerating plants
C.in starting air pipes
D.in air coolers
A.boiler drums
B.hot wells
C.condensers
D.evaporators
最新試題
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
Diesel engine air start system check valves are opened by （）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
If separating effect is not good, which measure should be taken （）
The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.
Flame failure in an automatically fired auxiliary boiler can from a/an （）
The main purpose of port State control is not to（）
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）