A.electric motor
B.volute
C.impeller
D.diffusion nozzle
您可能感兴趣的试卷
你可能感兴趣的试题
A.expansion valve to overfeed
B.compressor to knock
C.water regulating valve to fail
D.crankcase drains to plug
A.poor distillate quality
B.reduced evaporator capacity
C.low brine concentration
D.improper vacuum regulation
A.refrigerant boiling out of solution from the lube oil
B.liquid refrigerant flooding the compressor and system
C.lube oil viscosity being reduced by refrigerant dilution
D.compressor suction pressure suddenly increasing
A.It is corrosive
B.It is odorless
C.It is visible as h blue fog
D.It has a distinctive taste
A.settling in a fuel tank
B.testing in a laboratory centrifuge
C.burning in a calorimeter
D.testing in a closed cup
A.1382 tons
B.1561 tons
C.1600 tons
D.1637 tons
A.It is lower than the ignition temperature
B.It is the temperature at which a substance will spontaneously ignite
C.It is the temperature at which a substance, when ignited, will continue to bum
D.It is the temperature at which the released vapors will fall within the explosive range
A.bubbling refrigerant
B.overheating and oxidation
C.lowered operating temperatures
D.reducing the cloud or flash point
A.Impeller
B.Electric motor
C.Volute
D.Eye
A.carbon deposits on the compressor suction valves
B.the evaporator temperature to increase
C.rapid corrosion of the thermal expansion valve
D.no operating problems
最新试题
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
Which of the following statements is correct concerning heat transfer?（）
The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.
An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
Thermostatic expansion valves can be adjusted for （）.
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
When the steering gear is in operation, you should （）.
A grease gun is generally used to lubricate a （）.
A pressure drop through the refrigerant liquid line may cause （）.