A.open the steam line mot valve
B.drain the steam cylinder
C.close the steam cylinder drains
D.open the liquid cylinder drains
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A.rudder will respond sluggishly
B.hydraulic rams will over-speed
C.sight glass will show bubbles
D.ram relief valves will lift
A.continuous running of the compressor
B.high suction pressure
C.high discharge pressure
D.short cycling of the compressor on the water failure switch
A.the cooling effect of the condensate reduces the compressors efficiency
B.a danger of explosion exists whenever water is present in a compressor
C.water causes erratic operation of pneumatic components
D.the volumetric capacity of the first stage is reduced if water remains
A.the compressor short cycling on high pressure cut out switch
B.high suction pressure
C.high head pressure
D.bubbles in the sight glass
A.The two objects must be in physical contact
B.The two objects must be the same size
C.There must be an existing temperature differential
D.There must be an existing weight differential
A.insufficient lubrication
B.insufficient refrigerant
C.excess refrigerant
D.excessive opening of the expansion valve
A.increase compressor discharge pressure on demand
B.increase compressor operating speed as necessary
C.allow the motor to turn the compressor opposed only by friction
D.reduce the compressor frictional load when starting
A.Radiation
B.Conduction
C.Convection
D.Each of the above
A.Shortage of refrigerant oil
B.Slight shortage of refrigerant
C.Excessive condenser cooling water flow
D.Faulty expansion valve
A.vary their speed according to temperature and load
B.start and come up to speed before air compression begins
C.change speed according to overload demands
D.reduce compressed air charge density
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The output volume of a positive fixed displacement pump can be changed only by ().
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of ().
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should ().
The control mode in which the final control element is moved from one of two flexed positions to the other is known as ().
When the steering gear is in operation, you should ().
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by ().
The general purpose of a heat exchanger is to ().
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?()
A salinity indicator is used to determine the ().
An excessive charge of refrigerant in an air-cooled refrigeration system can cause ().