A.act as a shock absorber
B.maintain the stored oil under pressure
C.act as a base or foundation for the power unit
D.eliminate pressure surges in the system
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A.admit only enough fresh outside air to provide proper ventilation
B.reduce the air reheating system load
C.lower the compressor head pressure
D.operate the purge recovery unit continuously
A.lowest absolute humidity
B.lowest relative humidity
C.highest absolute humidity
D.highest relative humidity
A.change from blue to orange
B.‘flare up’ and remain lighted
C.probably go out
D.stay blue
A.flushed with clean refrigerant oil
B.purged with the refrigerant
C.washed with an ammonia and alcohol solution
D.grounded to compressor
A.petroleum crystals
B.phosgene gas
C.water vapor
D.carbon monoxide
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Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
Which of the following items don’t belong to dock repair works?（）
Engine parameters shall be corresponded to NOx Technical Files. This is required by （）
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
The shipboard oil pollution emergency plan will be invalid after （）
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.
If separating effect is not good, which measure should be taken （）
The condensers located in various stages of a flash evaporator are cooled by（）
Diesel engine air start system check valves are opened by （）
The ISPS Code consists of a mandatory section-Part A, which shows（）