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
The main purpose of port State control is not to（）
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.
Diesel engine air start system check valves are opened by （）
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
The cetane rating of diesel fuel is an indication of the （）
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
The condensers located in various stages of a flash evaporator are cooled by（）