A.opposing operational drag
B.pressure distribution
C.differential
D.system purge
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A.release
B.absorb
C.develop
D.regenerate
A.Sub-cooled liquid
B.Sub-cooled vapor
C.Superheated vapor
D.Liquid
A.latent heat of expansion
B.sensible heat of condensation
C.heat of compression
D.all of the above
A.have a high viscosity index
B.mix readily with refrigerant
C.have a high freezing point
D.have a low pour point
A.low wax content
B.high pour point
C.high viscosity
D.all of the above
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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
The cetane rating of diesel fuel is an indication of the （）
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
Which of the following items don’t belong to dock repair works?（）
（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
The condensers located in various stages of a flash evaporator are cooled by（）
If separating effect is not good, which measure should be taken （）
Flame failure in an automatically fired auxiliary boiler can from a/an （）
（） is not installed on the main switchboar.