Duct Construction

Question 1

What Is duct range for static pressure 

Answer 1

1/2 to 10 wc

Question 2

(Std) indicates standard(non variable volume ) in duct construction

Answer 2

True

Question 3

Stv stands for standard construction variable volume ducts

Answer 3

True

Question 4

Beaded sleeves that join traverse round ducts must be

Answer 4

Min 4” long at the same gauge

Question 5

What’s the most commonly used round duct reinforcement

Answer 5

Angle ring

Question 6

Fitting collar that slips into spiral pipe is called

Answer 6

Spigot

Question 7

All 1/2 to 1 pressure duct is classified how

Answer 7

Seal class C

Question 8

Sheet metal specifications are found in

Answer 8

Smacna

Question 9

Where designed air is not classified for verible volume what water column is used

Answer 9

1” wc

Question 10

VAV boxes have how much wc

Answer 10

2” wc

Question 11

Aluminum duct must be approximately how much thicker than galvanized

Answer 11

44 percent

Question 12

Residential ductwork is classified How

Answer 12

Low pressure with 1/2 wc

Question 13

Large commercial multi stories can reach how much wc

Answer 13

10 wc

Question 14

Industrial systems could reach much wc

Answer 14

30”wc

Question 15

Duct sizes or determine how

Answer 15

Pressure classes

Question 16

Air leakage is due to what

Answer 16

Static pressure

Question 17

Butt welds seams are good for what type of Seams

Answer 17

All seams

Question 18

What gauge is spiral duct made of for a commercial

Answer 18

26 gauge

Question 19

How deep is a slip joint

Answer 19

1”