A.main steam stop valve
B.auxiliary steam stop valve
C.feed check or control valve
D.blow down valve
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A.fuel valves of main engine
B.injector pump of main engine
C.safety valves of marine boiler
D.safety valves of a reciprocating pump
A.a mechanical seal
B.keyway and key
C.a nut
D.shrinkage
A.the thrust pads are while metal faced on both sides
B.the thrust pads are while metal faced only on the forward side
C.the thrust pads are while metal faced only on the after side
D.intermediate shaft usually supported by a plummer block
A.high speeds
B.medium speed
C.low speeds
D.the same speed with the engine
A.check oil level in bearing sump
B.check them for leakagec through end seals
C.pump bilges in time
D.check temperature
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Flame failure in an automatically fired auxiliary boiler can from a/an （）
Engine parameters shall be corresponded to NOx Technical Files. This is required by （）
The shipboard oil pollution emergency plan will be invalid after （）
Diesel engine air start system check valves are opened by （）
When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish
Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
To proceed to the assistance of a ship in distress is（）
The cetane rating of diesel fuel is an indication of the （）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.