Ammonia is extremely toxic to humans and must be used with care. When working with ammonia systems it is often necessary for the technician to wear ____.
A. gogles
B. breathing apparatus
C. protective clothing
D. All of the above.
Answer: D
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The primary function of a ______________ turf is to prevent soil erosion
Fill in the blank(s) with correct word
In a radiant floor-heating system, the terminal device(s) is commonly _____
a. a convector b. a unit heater c. a radiator d. plastic tubing
What is the purpose of a duct stretcher?
A) There is no such thing as a duct stretcher. B) To pull rectangular duct together when using drive cleats C) To increase the length of a sheet metal duct when it is within ¼ in D) To pull flexible duct straight
If brick veneer for a house facade requires either 28,200 standard-size brick or 22,560 engineered-size brick, what percentage fewer brick are needed if engineered-size brick are used?
What will be an ideal response?