EXAM PRACTICE/ STUDY GUIDE [MOST TESTED
QUESTIONS] COMPLETE QUESTIONS AND VERIFIED
ANSWERS GRADE A+
What are the three sections of a plumbing system? - (correct answer)
Distribution, waste, and supply
Which component is a safety device that ensures that the heating
element of a heating system switches off during a malfunction? -
(correct answer) Fusible link
Which unit of measure refers to the resistance within an electrical
device? - (correct answer) Ohms
The thermostat located inside of a clothes dryer ensures that which
other component turns on and off as needed? - (correct answer)
Heating element
Which type of voltage is used by HVAC controls and thermostats? -
(correct answer) 24 V
, A maintenance technician smells a strong odor of gas while standing
next to a water heater that is undergoing some repairs. The room is
dimly lit, but the technician believes the gas is leaking from the water
heater. Before leaving the area, which step would be MOST appropriate
for the technician to take? - (correct answer) Open access doors and
windows to allow more airflow
Which component of a fluorescent light fixture limits the current
through the electrical load? - (correct answer) Breaker
What should wrap around the tip of the thermocouple when correctly
installed in a gas water heater? - (correct answer) Pilot flame
During preparation to charge the refrigerant lines of an R-410A-based
system, the lines should be evacuated by vacuum to which micron
level? - (correct answer) 250
Which article is MOST hazardous to wear when performing
maintenance activities? - (correct answer) Metal necklace
If defective, which component would prevent a clothes dryer from
turning on? - (correct answer) ^ Door switch
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