CAR Installation Techniques 2 — Questions and Answers
Question 1: When disconnecting a gas dryer prior to recycling, which action must be performed FIRST?
- Shut off the gas supply valve (Correct answer)
- Remove the drum belt
- Disconnect the electrical cord
- Pull the unit away from the wall
Correct answer: Shut off the gas supply valve
The gas supply valve must be closed first to prevent gas leakage before any other disconnection steps are taken.
Question 2: Which type of fitting is the ONLY approved connection for a residential gas dryer supply line in the US?
- Push-fit compression fitting
- Flexible corrugated stainless steel connector (Correct answer)
- Rubber hose with hose clamps
- Schedule 40 PVC pipe with threaded ends
Correct answer: Flexible corrugated stainless steel connector
Flexible corrugated stainless steel (CSST or appliance connector) is the approved gas connector for residential dryer installations.
Question 3: A refrigerator being removed for recycling has a water line connected to its ice maker. What is the proper procedure?
- Cut the water line and leave it capped
- Shut off the water supply valve and disconnect the line before moving the unit (Correct answer)
- Leave the water line connected and drag the unit to the door
- Only disconnect the line after the unit is outside
Correct answer: Shut off the water supply valve and disconnect the line before moving the unit
The water supply must be shut off and the line disconnected before moving the refrigerator to prevent flooding and water damage.
Question 4: What is the required minimum clearance between a freestanding range and adjacent combustible cabinetry on each side?
- 0 inches — modern ranges are designed flush to cabinetry (Correct answer)
- 1 inch
- 6 inches
- 12 inches
Correct answer: 0 inches — modern ranges are designed flush to cabinetry
Most listed freestanding ranges are tested for zero clearance to combustible side surfaces, but always verify the manufacturer's installation manual.
Question 5: During removal of a built-in dishwasher, which connection is typically the LAST to be removed before sliding the unit out?
- The drain hose
- The water supply line
- The electrical connection or junction box wiring
- The mounting screws at the countertop bracket (Correct answer)
Correct answer: The mounting screws at the countertop bracket
Mounting screws at the countertop bracket are typically removed last so the unit stays stable while the drain, water, and electrical connections are safely disconnected first.
Question 6: What tool is used to confirm that a 240-volt electric dryer outlet is de-energized before touching the terminal block?
- Clamp meter
- Non-contact voltage tester (Correct answer)
- Ohmmeter
- Continuity tester
Correct answer: Non-contact voltage tester
A non-contact voltage tester safely detects live voltage at outlets or terminal blocks without requiring physical contact with conductors.
Question 7: When removing an over-the-range microwave for recycling, what is the primary structural concern?
- The grease filters may fall out
- The unit is heavy and mounted overhead, requiring two people and support (Correct answer)
- The power cord may arc if the circuit breaker is not tripped
- The turntable plate may crack
Correct answer: The unit is heavy and mounted overhead, requiring two people and support
Over-the-range microwaves are heavy (often 55–80 lbs) and mounted overhead, making two-person support essential to prevent injury or damage during removal.
CAR Installation Techniques 2
When disconnecting a gas dryer prior to recycling, which action must be performed FIRST?