A.only by the pump as its primary function
B.by resistance to the fluid flow through the system
C.by the thermal input to the systems fluid
D.solely by the charge applied by the accumulators
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A.increase the flow of the cooling water through the condenser
B.adjust the high pressure cutout to maintain the desired pressure
C.open the hot gas bypass temporarily to reduce capacity
D.purge non-condensable gases to reduce the excess pressure
A.Special tools are required for lapping or grinding
B.It is impossible to throttle flow with a butterfly valve
C.To close the valve, it is only necessary to turn the handle a quarter of a turn
D.The butterfly valve should never be used in a freshwater system
A.closely observe the pump discharge temperature
B.close off the discharge valve, and watch for a rise in pressure
C.momentarily close off the suction valve, and watch for a rise in pressure
D.use a clamp on ammeter and compare the readings to past records
A.removing all but the frictional load during starting
B.relieving intercoolers of high temperature buildups
C.providing high starting torque in the drive motor
D.seating valve plates during compressor shutdown
A.loose expansion valve control bulb
B.low differential setting on the H-Pcutout
C.blown fuse in the motor circuit
D.faulty suction pressure regulator
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If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be ().
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of ().
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by ().
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will ().
Which of the listed pumps is NOT a positive displacement pump?()
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is ().
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?()
Low compressor head pressure in a refrigeration system can be caused by().
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by ().
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?()