Title: Unit 8 Quiz
Course: HET 191 HVACR Heat Load > Section: HET 191 HVACR Heat Load

Q: A branch takeoff fitting #2J has an equivalent length of _____________ if there are zero downstream branches to the end of the trunk duct.
- Fifty feet
- Sixty feet
- Sixty-five feet
- Seventy feet
A: Fifty feet

Q: From the Friction Rate Worksheet, what is wrong if the calculated friction rate is 0.05" w.c.?
- The fan is too powerful, decrease the blower speed.
- The fan performance is inadequate, change the blower.
- The static pressure is too high, increase the blower speed.
- The static pressure is too low, Increase the duct system TEL.
A: The fan performance is inadequate, change the blower.

Q: What type of motor drive does a multi-speed, operating point blower have?
- A variable speed ECM motor.
- A multi-speed PSC or shaded pole motor.
- A three phase motor with a VFD controller
- A two speed consequent pole motor.
A: A multi-speed PSC or shaded pole motor.

Q: The available static pressure for moving air through a duct system is determined by adding up all of the individual component static pressure losses and subtracting that amount from the blower external static pressure.
- True
- False
A: True

Q: Given an available static pressure of 0.20" w.c., and a duct system with a TEL of 250 feet, what is the design friction rate?
- The design friction rate is 0.09" w.c.
- The design friction rate is 0.06" w.c.
- The design friction rate is 0.08" w.c.
- The design friction rate is 0.10" w.c.
A: The design friction rate is 0.08" w.c.