Electrician Practice Tests

To service or refill the existing the CFC refrigeration systems in USA, the CFC should come from ……………… after 1995 onwards

Which atoms can destroy more ozone molecules when they react with them?

…………..  is responsible for specific flow rates and pressure in the refrigeration circuit.

The low pressure gauge reads the system pressures above atmospheric pressure in ………….

What should be the typical pressure of disposable recovery cylinder before disposing it?

HCFC-22 is a high pressure refrigerant.

Electronic leak detector must have a sensitivity of …………………

Which of the following refrigerant is leading candidate for CFC-12 retrofit?

What should be placed in the system to prevent any debris that may damage the compressor?

What does happen to system if moisture is still left in an operating system?

With what the technician can conclude that the system is fully dehydrated?

In case of recovery cylinders are not available, the disposable cylinders can be used as recovery cylinders after proper testing and approval

When leak checking the refrigeration system never pressurize the system with ………….

Which of the following refrigerants has lower ozone depletion potential (ODP)?

Which of the following refrigerant blend can also be charged as vapour?