A common use for wood screws in HVACR work is:
A) Fastening power wires to floor joists.
B) Attaching hanging straps to wooden structures.
C) Connecting sheet-metal ductwork together.
D) Supporting flex duct by screwing it directly to floor joists.
B
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A string of 10 identical lamps connected in series has two terminal wires that connect to the 120V supply. The voltage across each lamp VL equals ___V.
Fill in the blank(s) with the appropriate word(s).
The connecting angles are shop-welded to the web of the beam. What size and type of weld are specified?
Cats can often survive a fall of up to 2 stories in height.
Answer the following statement true (T) or false (F)
An air conditioner with a fixed-restriction metering device is operating with an evaporator saturation temperature of 40°F and a suction line temperature of 42°F. The factory-specified superheat for the current operating condition is 12°F. After checking the airflow and determining that it is within specifications, the technician should:
A) Add charge because the system is undercharged. B) Leave the charge alone because it is cooling even better than factory specifications. C) Move some of the charge from the low side of the system to the high side of the system to balance the charge. D) Recover charge because the system is overcharged.