A.settling in a fuel tank
B.testing in a laboratory centrifuge
C.burning in a calorimeter
D.testing in a closed cup
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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
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The control mode in which the final control element is moved from one of two flexed positions to the other is known as ().
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?()
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should ().
A pressure drop through the refrigerant liquid line may cause ().
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 ().
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by ().
The general purpose of a heat exchanger is to ().
Which of the following statements is correct concerning heat transfer?()
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by ().