Electrician Practice Tests

In new household refrigeration which of the following refrigerants is most commonly used as a replacement for R12 refrigerant?

R12 and R22 refrigerants can decompose to …………… form at higher temperatures.

The recovery equipment manufactured after ……………. Must be certified by EPA laboratory to use for service or repair of small appliances.

For type 1 refrigeration appliance what is the the maximum allowable charge of refrigerant?

Which of the following refrigerants can be mixed?

The sale of refrigerant ………..

After completion of refrigerant repair, the solder-less piercing valves should be removed from refrigeration system because …………

When ever the pressurized nitrogen is used to blow debris out of the system …………..

The refrigerant recovery procedure should always be started after ………………….

Under EPA section 608 which of the following refrigerants must be recovered currently from refrigeration equipment?

Which of the following is perfect option in the event of large release of R-12 or R-22 in a contained are?

The following maintenance practice should be performed on recovery equipment as per EPA guidelines?

Portable refillable refrigerant containers must met the following standard to be used to ship the recovered refrigerants.

In a refrigerant recovery or repair from a refrigeration system if a pungent odor is detected …………………..

Which of the following is not a Type I refrigerant appliance?