Core /3

The stability of the ozone is depleted by the pressure of which of the following organic refrigerant compounds?

• hydrogen

• bromine

• chlorine

• all options

What connects the condenser to the expansion device?

• Discharge line

• Suction line

• Liquid line

• Expansion line

To meet the requirements of ARI 740, recovery and recycling equipment intended for use must be manufactured after what date?

• December 31, 1994

• January 1, 1995

• December 31, 1995

• November 15, 1993

What is the reason two refrigerants are not allowed to be collected into one recovery cylinder?

• Impossible to recover two refrigerants from one mixture.

• The refrigerant mixture can react with each other and explode.

• Both the options are correct.

What is the color of the pressure port of the manifold pressure gauge that is connected to the low-pressure side of the system?

• Red

• Blue

• Green

• Yellow

CFC's are broken down and freed of chlorine at the stratosphere by which of the following properties?

• Infrared radiation

• X-rays

• Ultraviolet radiation

• Gamma radiation

When the vacuum pump is being used is too large, water removal from the system will become...

• Easier

• More difficult

• Remain the same

What method is used in the case of absence of a label identifying the refrigerant?

• Pressure-temperature method

• Density-volume method

• Density-temperature method

• All the options are correct

While checking the pressure of the system, which of the following is used to minimize the leakage of the refrigerant?

• Self-sealing hoses

• Either can be used

• Hand valves

• Neither can be used

Just upstream of the _____inlet should be located this suction line filter drier.

• Expansion valve

• Compressor

• Condenser

• Evaporator