Question

1. What is the volumetric flow rate for a 15” duct with a velocity pressure of 22” H2O?

1. 1940 cfm   
2. 5249 fpm  
3. 4305 cfm   
4. 5428 cfm

2. What is the capture velocity at a point that is located 18 inches away from, and directly in front of, the opening of a rectangular flanged hood with dimensions of 2 inches wide by 12 inches long when the air flow servicing the hood is 585 cfm.

1. 34 fpm
2. 145 fpm
3. 150 fpm
4.   160 fpm

3. Which of the following would represent the most significant clothing adjustment correction factor in calculating an accurate WBGT?

1. Polyolefin coveralls
2. Double-layer woven clothing
3. Work Clothes
4. SMS polypropylene coveralls

4. The air velocity to transport dust and other solids in a duct must be high in order to prevent the particles from settling and plugging ductwork. The minimum velocity, called transport velocity, is typically

1. 500 to 1,000 linear feet per minute
2. 1,000 to 3,000 linear feet per minute
3. 3,500 to 4,000 linear feet per minute
4. 4,500 to 7,000 linear feet per minute

5. The velocity of air in a duct can be estimated by measuring the velocity pressure. What instrument is best suited for obtaining this pressure measurement?

1. a vanned anemometer
2. a thermal anemometer
3. a pitot tube
4. a balometer

Answer 1

1) b

2) b

3) c

4) c

5) a

As this is mcq type.. so I only answered the answer only..