Which type of duct material is used in low-traffic areas and provides insulation to the duct system?
A. galvanized metal
B. fiberglass-wrapped, spiral duct (flexible duct)
C. fiberglass, fiberboard sheeting
D. round sheet metal
Answer: C
Trades & Technology
You might also like to view...
With what must the nozzle spray pattern be compatible for proper mixing?
A) Mix of oil and air B) Spray angle C) Burner air pattern D) Orifice
Trades & Technology
Opening a drain or blowdown valve on an operating boiler can result in _____
a. boiler damage b. flash steam c. a rise in boiler operating pressure d. valve failure
Trades & Technology
A variable rate spring design that has a cylindrical shape with an unequally spaced coils is called a __________ rate coil spring.
Fill in the blank(s) with the appropriate word(s).
Trades & Technology
Find the overall transfer functions of the systems in Figure E.6 in the form of a single ratio of polynomials in s.
Trades & Technology