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What component does the thermostat in a clothes dryer control to regulate temperature?
A. Motor
B. Timer
C. Heating element
D. Drum switch
What type of voltage is typically used for HVAC controls and thermostats?
A. 120 V
B. 12 V
C. 24 V
D. 240 V
A maintenance technician detects a strong gas odor while repairing a water heater. Before
leaving the area, what should the technician do FIRST?
A. Turn on a flashlight
B. Use a lighter to locate the leak
C. Open doors and windows to increase ventilation
D. Restart the pilot light
What are the three main sections of a plumbing system?
, A. Water, air, and waste
B. Supply, waste, and distribution
C. Drainage, irrigation, and venting
D. Feed, drain, and collection
Which component acts as a safety device that shuts off the heating element during a
malfunction?
A. Transformer
B. Fusible link
C. Relay
D. Solenoid
What unit of measurement is used to express electrical resistance?
A. Volts
B. Amps
C. Watts
D. Ohms
In a fluorescent light fixture, which component limits the current through the circuit?
A. Ballast
B. Breaker
C. Capacitor
D. Ignitor
When properly installed in a gas water heater, the tip of the thermocouple should be
surrounded by the:
A. Pilot flame
B. Burner gas
C. Vent exhaust
D. Igniter spark