A.control air system
B.forced draft air system
C.supply air system
D.ships service air system
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A.dehydrated
B.purged
C.plugged
D.evacuated
A.combustion control air system
B.supply air system
C.ships service air system
D.low pressure deck air system
A.dry bulb temperature
B.wet bulb temperature
C.saturation temperature
D.water vapor superheat
A.The follow-up gear
B.The rudder angle indicator
C.The synchronous electric transmitter
D.A rudder angle limit switch
A.apparent slip
B.tree slip
C.pitch
D.propulsive efficiency
A.two or more impellers housed together in one casing and mounted on a single shaft
B.a single stepped impeller mounted in a progressively staged casing
C.a large radial clearance between the impeller and casing to prevent overheating due to
D.an increase in the discharge velocity of the liquid with a corresponding decrease in pressure through the stages
A.add refrigerant to the system
B.adjust the thermal expansion valve to the proper setting
C.adjust the float valve to the proper holding pressure
D.open the hand expansion valve
A.a stuck solenoid valve
B.a shortage of refrigerant
C.too much oil in circulation
D.too much superheat
A.trick-wheel
B.follow-up control
C.six-way valve
D.Rapson slide
A.stress
B.strain
C.shear strength
D.ultimate tensile strength
最新试题
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is ().
The usual symptoms of cavitation in a centrifugal pump is ().
Thermostatic expansion valves can be adjusted for ().
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will ().
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be ().
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by ().
An excessive charge of refrigerant in an air-cooled refrigeration system can cause ().
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will ().
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by ().
A salinity indicator is used to determine the ().