A.steam rather than gas is used to turn a shaft
B.vapor rather than gas is used to turn a shaft
C.the former uses gas to turn a shaft
D.the latter uses gas to turn a shaft
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A.they operate between 150 and 450 rpm
B.they are connected to the propeller by gearing
C.their smaller size and weight
D.they can be connected directly to the propeller without gearing
A.both of them are ignited by compressed air
B.both of them are the forms of external combustion engines
C.both of them have spark plugs
D.the power is developed by the piston in the cylinder
A.found out
B.eliminated
C.avoided
D.lowered
A.indicator diagrams
B.nomo-gram
C.temperature readings
D.pressure readings
A.the bad smoke
B.the smoky exhaust
C.the exhaust temperature
D.the peak pressure
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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
To proceed to the assistance of a ship in distress is（）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
The cetane rating of diesel fuel is an indication of the （）
（） is not installed on the main switchboar.
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
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