Question 1
A top-load washer fills but does not agitate. The lid is closed and the timer advances. Which failure is most consistent?
Show answer & explanation
Correct answer: B - Defective lid switch preventing agitation
10 exam-style questions with answers and explanations, straight from our 1,030-question bank. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
The NASTeC exam has 40 questions and runs 1 hour.
These 10 free NASTeC questions are organized by exam domain, so you can see how each part of the Certified National Appliance Service Technician - Laundry and Dishwashing blueprint is tested. Reveal the answer and explanation under each question.
A top-load washer fills but does not agitate. The lid is closed and the timer advances. Which failure is most consistent?
Correct answer: B - Defective lid switch preventing agitation
A washer finishes a cycle with clothing soaked. What should the technician verify before replacing major parts?
Correct answer: A - Drain path and pump operation
A dryer runs and tumbles but clothing remains damp. Exhaust airflow is restricted. What is the best next action?
Correct answer: B - Correct the airflow restriction
A dryer heating element tests intact, but no heat is produced. Which approach is appropriate?
Correct answer: A - Check components controlling power delivery to heater
A dishwasher fills normally but dishes remain dirty. What should be checked before replacing the control board?
Correct answer: A - Wash circulation and spray arm performance
A dishwasher drains poorly because the drain hose routing allows backflow. Which principle applies?
Correct answer: A - Mechanical routing can affect water removal
A food waste disposer hums but does not rotate. What condition should be considered first?
Correct answer: A - Jammed grinding mechanism or locked rotor
A disposer stops during heavy use and later restarts after cooling. Which feature likely operated?
Correct answer: A - Thermal overload protection
A trash compactor motor runs but the ram does not move. What area should be inspected?
Correct answer: A - Drive components transferring motor motion
Before servicing a trash compactor with a suspected mechanical problem, the technician should first:
Correct answer: A - Disconnect power and verify safe conditions
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