Ductboard Fabrication
Ductboard Fabrication
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Question 1 |
Fiberglass ductboard is available in thicknesses of
A | ½” and 1”
|
B | ½” and 1 ½ “
|
C | 1” and 1 ½ “
|
D | 1 ½ “ and 2 ½ “ |
Question 2 |
What is the maximum static pressure that can be obtained using fiberglass ductboard on the positive side of the system?
A | ½ “ WC |
B | 1” WC |
C | 1 ½ “ WC |
D | 2” WC |
Question 3 |
What is the maximum static pressure that can be obtained using fiberglass ductboard on the negative side of the system?
A | ½ “ WC |
B | 1” WC |
C | 1 ½ “ WC |
D | 2” WC |
Question 4 |
What is the maximum air velocity that can be used in a fiberglass ductboard system?
A | 1,200 fpm |
B | 1,800 fpm |
C | 2,400 fpm |
D | 3,600 fpm |
Question 5 |
What is the maximum temperature that is permitted inside a fiberglass ductboard system?
A | 200F |
B | 250F |
C | 300F |
D | 350F |
Question 6 |
What is the maximum temperature that is permitted on the outside surface of a fiberglass ductboard system?
A | 150F |
B | 200F |
C | 100F |
D | 250F |
Question 7 |
When screws are used to fasten ductboard to a metal surface, which is the proper procedure?
A | Use a #8 sheet-metal screw with a 2” round washer |
B | Use a #10 sheet-metal screw with a 2 ½ “ square washer |
C | Use a #8 sheet-metal screw with a 2 ½ “ square washer |
D | Use a #10 sheet-metal screw and a 2” round washer |
Question 8 |
Screws used to fasten ductboard material must be
A | A minimum of ½ “ longer than the board thickness |
B | A minimum of ¼ “ longer than the board thickness |
C | A minimum of ¾ “ longer than the board thickness |
D | A minimum of 1” longer than the board thickness |
Question 9 |
A shiplap joint flap must be stapled every
A | 2” on center |
B | 3” on center |
C | 4” on center |
D | 5” on center |
Question 10 |
What is commonly used to cover a stapled shiplap joint flap?
A | 2% silver tape |
B | Duct tape |
C | Aluminum tape |
D | Mastic used with masking tape |
Question 11 |
Crosstabs are used to hold seams in position when staples are not used. A crosstab is made of
A | A 5” minimum length of aluminum foil tape that is placed across a taped joint every 15”
|
B | An 8” minimum length of aluminum foil tape that is placed across a taped joint every 12”
|
C | A 10” minimum length of aluminum foil tape that is placed across a taped joint every 15” |
D | A 12” minimum length of aluminum foil tape that is placed across a taped joint every 12” |
Question 12 |
The minimum width of pressure sensitive aluminum foil tape that is used on fiberglass ductboard is
A | 1 ½ “
|
B | 2” |
C | 2 ½ “
|
D | 3” |
Question 13 |
Aluminum foil tape must overlap each side of a fiberglass ductboard joint by a minimum of
A | 1”
|
B | 1 ½ “ |
C | 2”
|
D | 2 ½ “ |
Question 14 |
If aluminum foil tape is stored in an area less than 50F,
A | The tape is permanently damaged and should not be used |
B | The tape can be used only with a mastic material |
C | The tape must be preheated before it is used |
D | Additional glue must be added to the tape before use |
Question 15 |
When using heat-activated tape, what temperature must the tape be heated to after being applied to the fiberglass ductboard?
A | 300-400 F |
B | 400-500 F |
C | 450-550 F |
D | 550-600 F |
Question 16 |
What is the minimum width of heat-activated tape that is used on fiberglass ductboard?
A | 2”
|
B | 2 ½ “ |
C | 3”
|
D | 3 ½" |
Question 17 |
What is the purpose of a tie rod in a fiberglass ductboard system?
A | It is used to hang the duct from a ceiling |
B | It is used to raise the duct off of the ceiling joists when placed in an attic |
C | It is used to connect two sections of duct together |
D | It is used to increase the rigidity of the ducts |
Question 18 |
A tie rod used for fiberglass ductboard must be made of
A | 18 gauge stainless steel wire |
B | 16 gauge galvanized steel wire |
C | 14 gauge stainless steel wire |
D | 12 gauge galvanized steel wire |
Question 19 |
A tie rod
A | Is commonly placed horizontally in a ductboard system |
B | Is commonly placed vertically in a ductboard system |
C | Can only be used with 1” thick fiberglass ductboard systems |
D | Can only be used with 1 ½ “thick fiberglass ductboard systems |
Question 20 |
When a transverse joint is used in a fiberglass ductboard system, the tie rod must be placed
A | 4”from the end of the male joint |
B | 4”from the end of the female joint |
C | 5”from the end of the male joint |
D | 5”from the end of the female joint |
Question 21 |
When a butt joint is used in a fiberglass ductboard system, the tie rod must be placed
A | 3” on either side of the joint |
B | 4” on either side of the joint |
C | 5” on either side of the joint |
D | 6” on either side of the joint |
Question 22 |
When using a male and female shiplap joint in a fiberglass ductboard system.
A | Air must always flow from the female to the male end of the joint |
B | Air must always flow from the male to the female end of the joint |
C | Air can flow in either direction |
D | Male shiplap joints are never used with female joints |
Question 23 |
When a V-grooves most commonly used in fiberglass ductboard systems?
A | When connecting two ductboard sections together |
B | On ductboard corners as a seam |
C | On single flat board sections to create a rectangular duct |
D | To connect supports to the ductboard section |
Question 24 |
What type of joint is not permitted on corners of a ductboard system?
A | Male to female shiplap joints |
B | Square cut to square cut joints |
C | Female shiplap to square cut joints |
D | V-grooves |
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