The function of a check valve is similar to the function of which type of damper?
a) A manual damper
b) A modulating damper
c) A two-position damper
d) A relief damper
e) A louver
Answer: D
The function of a check valve is similar to the function of which type of damper?
a) A manual damper
b) A modulating damper
c) A two-position damper
d) A relief damper
e) A louver
Answer: D