Hvac Safety Checklist

Question 1

Section 2 unit 9

Transfer refrigerants only into ________ containers.

Answer 1

DOT-approved

Department of Transportation

Question 2

Section 2 unit 9.

Why you should never overheat the system’s tubing while the system is pressurized

Answer 2

This can cause a blowout and serious injury.

When certain refrigerants are exposed to high temperatures, a flame, or a glowing hot metal, they can decompose into hydrochloric and/or hydrofluoric acids and phosgene gas.

Question 3

Section 2 unit 9.

Why you should never energize the compressor when under a deep vacuum

Answer 3

This can cause a short in the motor windings at the fusite terminals or at a weak spot in the windings, which may damage the compressor.

Question 4

What things should you look for in equipment and systems to help limit refrigerant
emissions?

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General Service & Maintenance

Answer 4

1. making sure that equipment used is approved by the EPA,
2. checking for leaks, repairing leaks
3. making sure that all fittings are tight during service and recovery.

Question 5

What is the most effective method for checking for small leaks

EPA 608 Technician Certification Study Guide: Core 20
©2016 TPC Trainco SGEPA 101 0116
General Service & Maintenance

Answer 5

When checking for small leaks, using a halide

torch is the most effective method

Question 6

If the system completly lost its charge. How can you test a system for leaks

EPA 608 Technician Certification Study Guide: Core 20
©2016 TPC Trainco SGEPA 101 0116
General Service & Maintenance

Answer 6

If the system has completely lost its charge
and you want to test it for a leak, charge it with dry nitrogen for testing and never use refrigerant
gases.

Question 7

Nitrogen is environmentally friendly and is safe to handle.

True or false

EPA 608 Technician Certification Study Guide: Core 20
©2016 TPC Trainco SGEPA 101 0116
General Service & Maintenance .

Answer 7

True

Question 8

What should you do if a compressor burns out

EPA 608 Technician Certification Study Guide: Core 20
©2016 TPC Trainco SGEPA 101 0116
General Service & Maintenance

Answer 8

1. Triple-evacuate the system.
2. Install a permanent filter-drier.
3. Conduct a deep vacuum before recharging

Question 9

What will need to happen if the oil has been contaminated by a burnout?

EPA 608 Technician Certification Study Guide: Core 20
©2016 TPC Trainco SGEPA 101 0116
General Service & Maintenance

Answer 9

If you suspect a major leak or major component failure, an oil sample should be taken. If there
are contaminants in the oil, the system will need to be flushed.