The proper NEMA designation for a 30-ampere, 125/250-volt grounding-type receptacle installed for an electric clothes dryer is __________.
a. 5-15R
b. 6-30R
c. 14-30R
d. 10-30R
c. 14-30R
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Which of the followings statements regarding chimney sealant is correct?
A. Silicone caulk should not be used as a chimney sealant. B. Oil-based sealants should be used for chimneys. C. Caulking is often used to hide poor workmanship. D. Priming is not necessary prior to using a sealant on a chimney.
To determine the correct connector size for MC cable, _____.
a. use the correct color coded connector b. refer to the manufacturer’s literature c. check the NEC® code d. use the smallest connector that will fit the conductor
The condenser in a refrigeration system ____.
A. desuperheats the vapor from the compressor B. condenses the vapor from the compressor C. subcools the liquid refrigerant before it leaves the condenser D. All of the above.
A balanced ventilation system:
A) Can be installed with only a single central support in the middle. B) Supplies and exhausts the same amount of air into the building. C) Can also provide heating and cooling. D) Uses a highly balanced blower wheel.