What adjusted friction rate should be used to size a duct for a design friction rate of 0.1 in WC if the duct has a total equivalent length of 75 feet?

A) 0.1 in WC because the duct length is irrelevant
B) 0.10 × (75/100 ) = 0.10 × 0.75 = 0.075 in WC
C) 0.10 × (100/75 )= 0.10 × 1.33 = 0.133 in WC
D) The friction rate cannot be determined with the information given.


C

Trades & Technology

You might also like to view...

Which of the following is the symbol for a trayed tower?

Figure

Trades & Technology

In the cell, the peanut-shaped ____________________ break down food nutrients and supply the cell with energy

Fill in the blank(s) with correct word

Trades & Technology

?In electronic variable orifice (EVO) steering systems:

A. ?Full power steering assistance is provided if the vehicle speed is below 10 mph (16 km/h) and steering wheel rotation is above 15 rpm. B. ?The control unit increases steering assistance at higher speed to provide improved road feel. C. ?Steering assistance is increased if the vehicle is cornering at high speeds. D. ?Steering assistance is increased if the vehicle is driven straight ahead at highway speeds.

Trades & Technology

Which sensor is used to determine engine load?

A) TP B) ECT C) MAP D) RPM

Trades & Technology