When there is an elbow in fiberglass duct, a hanger must be placed within _____.
a. 12 inches of the elbow throat
b. 12 inches of the connection to the straight duct
c. 18 inches of the elbow throat
d. 18 inches of the connection to the straight duct
a. 12 inches of the elbow throat
You might also like to view...
Bees pollinate more than $15 billion worth of fruit, vegetable, and legume crops every year in the
United States.
Indicate whether the statement is true or false.Interiorscapers need to recognize indoor areas prone to colder temperatures, such as vestibules in
cooler months and ____ during the summer.
a. hallways c. air conditioning vents b. attics d. carpets and flooring
The ________ set of standard conditions are used to reference pressure and temperature when calculating specific gravity and specific volume of substances
A) AHRI B) ASHRAE C) RSES D) ACCA
In a switch-mode power supply the role of the inductor is
A) to produce a constant load current B) surge protection C) to function as a low-pass filter D) to function as a high-pass filter