Electrician Practice Tests

The refrigerant cylinders always shipped in ……………. position with their valves on top.

The relief valves which are placed in the downstream line of nitrogen pressure regulator must not be installed in ………….

After which year onwards the CFC refrigerant should come from recovery and recycling to service existing refrigeration systems in USA?

Disposable cylinders are primarily used for ………….. refrigerant

CFC and HFC both have which of the following in common?

The ozone layer in the earth’s stratosphere protects the earth from ………..

Which of the following is not a ozone depleting substances (ODS)?

In refrigeration system low pressure liquid is converted into low pressure vapour in …….

……………. mixture is called as ternary refrigerant blend.

A compound gauge connected to low side of the refrigeration system measures the pressure in ……

Any two refrigerants should not be mixed because

Removing water vapor from refrigeration system is called as ….

The cooling occurs in vapor compression cycle refrigeration system, when …..