Practice Test Geeks(CAR) Certified Appliance Recycler Practice Test
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Troubleshooting & Diagnostics Flashcards

7 cards from real CAR practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Troubleshooting & Diagnostics flashcards as text

  1. A microwave oven turns on but does not heat food. Which component is MOST likely faulty?

    Answer: Magnetron tube

    The magnetron generates the microwave energy that heats food; if it fails, the oven operates normally except no heating occurs.

  2. A refrigerator makes a clicking noise every few minutes but the compressor never starts. Which component should be tested?

    Answer: Start relay or overload protector

    A faulty start relay or overload protector repeatedly attempts and fails to start the compressor, producing a clicking sound each cycle.

  3. During recycling intake, an oven's broil element works but the bake element does not. What is the FIRST diagnostic step?

    Answer: Check for continuity in the bake element with a multimeter

    Testing continuity in the bake element confirms whether the element is open-circuited before condemning or replacing it.

  4. A front-load washer displays an E3 or UE error code during spin. What does this typically indicate?

    Answer: Load is unbalanced in the drum

    An unbalanced load error (E3/UE) occurs when the drum detects uneven weight distribution that could damage the machine during high-speed spin.

  5. Which symptom MOST suggests a faulty defrost heater in a frost-free refrigerator?

    Answer: Excessive frost buildup on evaporator coils

    A failed defrost heater cannot melt accumulated frost from the evaporator coils, leading to heavy frost buildup that restricts airflow and cooling.

  6. When diagnosing an electric range with one burner that heats weakly, what is the MOST likely cause?

    Answer: Worn surface element socket contacts

    Worn or corroded socket contacts create resistance in the circuit, reducing current flow to the surface element and causing weak heating.

  7. A technician uses a manifold gauge set on a refrigeration unit and finds suction pressure is very low with discharge pressure normal. What does this indicate?

    Answer: Restriction in the liquid line or filter-drier

    A restriction in the liquid line or clogged filter-drier starves the evaporator of refrigerant, causing abnormally low suction pressure while discharge remains normal.