CAR Appliance Recycler Equipment Dismantling 2 — Questions and Answers
Question 1: When dismantling a refrigerator with a built-in ice maker, which component must be drained before disassembly begins?
- The compressor oil reservoir
- The water supply line and ice maker reservoir (Correct answer)
- The defrost drain pan
- The capacitor discharge circuit
Correct answer: The water supply line and ice maker reservoir
The water supply line and ice maker reservoir must be drained to prevent water release and slipping hazards during dismantling.
Question 2: Which OSHA standard is most directly applicable to workers who manually dismantle large household appliances?
- 29 CFR 1910.147 (Lockout/Tagout) (Correct answer)
- 29 CFR 1910.95 (Occupational Noise)
- 29 CFR 1910.134 (Respiratory Protection)
- 29 CFR 1910.66 (Powered Platforms)
Correct answer: 29 CFR 1910.147 (Lockout/Tagout)
Lockout/Tagout (29 CFR 1910.147) controls hazardous energy during servicing and dismantling of equipment.
Question 3: A technician encounters a washing machine with a balancing ring containing liquid. What is the correct handling procedure?
- Puncture the ring and drain liquid before dismantling
- Leave the ring intact and recycle it as-is with the drum
- Remove the ring intact and send to specialized liquid waste disposal (Correct answer)
- Freeze the unit first to solidify the liquid
Correct answer: Remove the ring intact and send to specialized liquid waste disposal
Balancing ring liquid (typically salt water or saline) should be kept contained; the intact ring is separated and sent to appropriate disposal.
Question 4: What is the primary hazard when cutting open a microwave oven magnetron during dismantling?
- Electrical shock from residual charge
- Beryllium oxide ceramic insulator exposure (Correct answer)
- Mercury vapor release
- Explosive decompression of the waveguide
Correct answer: Beryllium oxide ceramic insulator exposure
Magnetron ceramic insulators often contain beryllium oxide, a highly toxic material if dust is inhaled.
Question 5: When removing a gas range for dismantling, the first step after disconnecting the gas supply is to:
- Cut the electrical wiring harness
- Purge residual gas by briefly opening all burner valves
- Cap or crimp the gas inlet line (Correct answer)
- Test the igniter circuits for voltage
Correct answer: Cap or crimp the gas inlet line
After disconnecting gas supply, the inlet line must be capped or crimped immediately to prevent any residual gas from escaping.
Question 6: Which type of blowing agent used in older refrigerator foam insulation requires the most stringent atmospheric emissions controls during shredding?
- Cyclopentane
- CFC-11 (trichlorofluoromethane) (Correct answer)
- Carbon dioxide
- Isopentane
Correct answer: CFC-11 (trichlorofluoromethane)
CFC-11 has an ozone depletion potential of 1.0 and must be captured using specialized foam shredding with gas extraction systems.
Question 7: A window air conditioner label lists 'R-410A' as the refrigerant. At what pressure must the recovery cylinder be rated to safely store this refrigerant?
- At least 400 psig (Correct answer)
- At least 260 psig
- At least 150 psig
- Any DOT-approved cylinder is sufficient
Correct answer: At least 400 psig
R-410A operates at higher pressures than older refrigerants and requires recovery cylinders rated for at least 400 psig.
CAR Appliance Recycler Equipment Dismantling 2
When dismantling a refrigerator with a built-in ice maker, which component must be drained before disassembly begins?