The unit of measurement of capacitance is called a(n)____.
A. ohm (W)
B. farad (F)
C. henry (H)
D. volt (V)
Answer: B
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A) 11%
B) 18%
C) 22%
D) 33%
A vapor retarder is required under
A) all interior concrete slabs-on-ground. B) all concrete slabs-on-ground. C) all exterior concrete slabs-on-ground. D) some interior concrete slabs-on-ground.
The economizer on a commercial packaged air conditioning system
A) Limits the operating cycles of the system to no more than 15 minutes B) Reduces the voltage to the compressor during peak loads to save power C) Uses outdoor air to provide cooling at low ambient temperatures D) Reduces the indoor blower speed during peak loads to produce cooler air and save energy
How many amps should a low-voltage fuse be rated for to protect the secondary of a low-voltage transformer used in a residential HVAC system?
A. 1 B. 3 C. 5 D. 7