decreased clearances between rotating parts
decreased slippage to the suction side of the pump
air binding in the discharge ports
erosion and excessive wear
第1题:
An increase in rotor clearances in a rotary pump will ______.
A.increase discharge pressure
B.decrease pump capacity
C.decrease pump cavitation
D.decrease reaction ring clearance
第2题:
Which method should be used to warm up the pump turbines prior to discharge ________.
A.Lock the turbine rotor and slowly bleed in steam until operating temperature is reached
B.Run the pump at high speed with the discharge valves closed
C.Run the turbine at slow speed with the pump disconnected
D.Shut the discharge valve and run the pump at slow speed
第3题:
A.plan
B.requirement
C.implementation
D.design
第4题:
worn gland sealing shaft
worn wearing rings
a bent shaft
reversed pump coupling
第5题:
Most Computer operating systems in use today, including all consumer-targeted systems, include a TCP/IP().
第6题:
If the suction pressure for an operating refrigeration compressor is below normal, the cause may be ______.
A.an excess of liquid refrigerant
B.the expansion valve overfeeding
C.a fouled compressor suction strainer
D.the compressor short cycling
第7题:
Which pump must always be primed ________.
A.Centrifugal pump
B.Reciprocating pump
C.Rotary pump
D.All of the above
第8题:
The vehicle was traveling at speeds______90 miles per hour.
A.in addition to
B.in view of
C.in excess of
D.in search of
第9题:
You need to recommend a configuration design for the new VMs. The design must ensure that operating systems can be deployed to the new VMs. What should you include in the recommendation?()
第10题:
only by the pump as its primary function
by resistance to the fluid flow through the system
by the thermal input to the systems fluid
solely by the charge applied by the accumulators