On an air-to-water heat pump, where does the heat come from to defrost the outdoor coil?
A) Indoor air B) Outdoor heat strips
C) Outdoor air D) Buffer tank
[Ques. 2] ________ light can be used inside a duct system to kill mold, fungus, bacteria, and other living contaminants.
A) Ultraviolet B) Infrared C) Solar D) Incandescent
[Ques. 3] What procedure should be used to size air-conditioning equipment?
A) Divide the house square footage by 600 and round up to the nearest whole number to arrive at the unit capacity in tons.
B) Divide the house volume by 15 to arrive at air changes and then divide that answer by 400 to get the unit capacity in tons.
C) Perform a load study using ACCA Manual J.
D) Multiply the rooms by 120 to get the system airflow, then divide that answer by 400 to get the unit capacity in tons.
[Ques. 4] Infiltration calculations in Manual J8 are based on:
A) Thermal imaging measurements.
B) Taking accurate measurements of airflow around windows and doors.
C) Blower door measurements.
D) Estimates of air changes in the house.
[Ques. 5] When performing an operation check, be sure to consult the:
A) Current voltage draw. B) Manufacturer's specifications.
C) Minimum voltage rating. D) Data plate.
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