A.compressor is overloaded
B.motor is overloaded
C.foundation bolts are loose
D.belts are too tight
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A.rapidly
B.by gravity
C.through a standard orifice at a specified temperature
D.at a rate of 60cc per second
A.flooding back
B.superheating
C.overflowing
D.recycling
A.Absorb erosion of high velocity discharge stream
B.Seal pump shaft against entry of air
C.Isolate the discharge side from the suction side
D.Dampen the turbulent discharge flow
A.cooling only
B.cooling and humidifying
C.cooling and dehumidifying
D.adiabatic cooling
A.Sea water is heated to boiling temperature while under a vacuum
B.Sea water is passed over heated plates in a thin film
C.Heated sea water is injected into a vacuum chamber
D.Sea water is forced through a heated eductor
最新試題
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 （）.
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.
Which of the following statements is correct concerning heat transfer?（）
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）
An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.
The usual symptoms of cavitation in a centrifugal pump is （）.
The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.
The major source of chemical contaminants in hydraulic fluid is （）.