SOLUTIONS
The thermostat located inside of a clothes dryer ensures that which other component
turns on and off as needed? - ANSWER Heating element
Which type of voltage is used by HVAC controls and thermostats? - 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? - ANSWER Open access doors and
windows to allow more airflow
What are the three sections of a plumbing system? - 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? - ANSWER Fusible link
Which unit of measure refers to the resistance within an electrical device? - ANSWER
Ohms
Which component of a fluorescent light fixture limits the current through the electrical
load? - ANSWER Breaker
What should wrap around the tip of the thermocouple when correctly installed in a gas
water heater? - 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? - ANSWER 250
Which article is MOST hazardous to wear when performing maintenance activities? -
ANSWER Metal necklace
If defective, which component would prevent a clothes dryer from turning on? -
ANSWER ^ Door switch
Which problem is MOST likely the result of a defective element in an electric kitchen
range? - ANSWER The oven does not heat above 200 蚌.
A defective timer switch in a washing machine can be the source of all of the following
problems EXCEPT: - ANSWER An out-of-balance machine
, While inspecting an apartment home, a maintenance technician notices poor air
circulation. The air coming out of the vents is very low pressure; however, the blower
seems to be running adequately. Which issue is the MOST likely cause of the poor air
flow throughout the home? - ANSWER Heavily clogged air filter
Which tool is used to check voltage, ohms, and amperage in an air conditioning
system? - ANSWER Multimeter
Residents should be warned that all of the following materials can be put in a garbage
disposal EXCEPT: - ANSWER Chicken bones
When a refrigerator is freezing up, it can be the result of a defect in any of the following
components EXCEPT the: - ANSWER Fill valve.
Which method is BEST for achieving a smooth joint when removing excess caulk? -
ANSWER Wiping with a wet finger
Which phrase describes the BEST way to prioritize maintenance work that is not an
emergency situation? - ANSWER First-come, first-served
Which reason BEST describes why electrical tools have insulated handles? - ANSWER
To prevent users from being shocked or electrocuted through the tools
OSHA regulations mandate that employers: - ANSWER Train employees to protect
themselves and others
Which type of voltage is used by standard residential electrical outlets? - ANSWER 120
V
How does a system that has a Seasonal Energy Efficiency Ratio (SEER) of 15 compare
to a system that has a SEER of 13? - ANSWER The system with a SEER of 15 is more
efficient.
Which statement is TRUE regarding an upgrade from an R-22-based system to an R-
410A-based system? - ANSWER The brazing methods recommended for the copper
lines are the same.
Which emission is a dangerous byproduct of gas heating systems? - ANSWER Carbon
monoxide
Which instruction should be followed during the brazing of copper lines of an R-410A-
based system? - ANSWER Allow dry nitrogen to flow through the lines with no
pressure.
Which component of an air conditioning system pumps the refrigerant throughout the
system? - ANSWER Compressor