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
A.high pressure alarm
B.fire alarm
C.extinguishers
D.fusible plugs
A.filled
B.evacuated
C.compressed
D.charged
A.greater
B.smaller
C.better
D.worse
A.hydraulic head
B.static head
C.heat energy
D.steam
A.a liquid
B.a pressure
C.a temperature
D.none of the above
最新试题
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the()
Using a file without a handle may result in ()
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()
If two A.C.generators are to be operated in parallel, the load is distributed evenly by()
Under MARPOL Code the ship to which it applies has to carry ()
Flame failure in an automatically fired auxiliary boiler can from a/an ()
Which of the following items don’t belong to dock repair works?()
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?()
The condensers located in various stages of a flash evaporator are cooled by()
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.