Flat Rectangular AandB+ Roof Jacks

Question 1

The circumference rule is flexible and can be used as a guide for __________ curves.

Answer 1

Irregular curves

Question 2

What is commonly used as a right angle or straight edge in a shop?

Answer 2

Framing square

Question 3

What are protractors used for?

Answer 3

To measure and develop various angles

Question 4

What is preferred to use for marking break lines and cut lines on metal

Answer 4

Felt markers

Question 5

What helps save material and time during fitting fabrication

Answer 5

A Cut list

Question 6

Growth allowance for fittings is typically removed by _________inch per joint

Answer 6

1/16”th

Question 7

What is used to scribe lines parallel to the edge of a sheet of metal?

Answer 7

The Marking Gauge

Question 8

What is used to scribe arcs larger than you can with dividers?

Answer 8

Trammel points out that

Question 9

Before you develop a pattern, ensure the material is:

Answer 9

Cut to size and square

Question 10

Flat rectangular fittings typically consist of:

Answer 10

Cheeks and wrappers/runners

Question 11

Adjusting the __________ pressure ensures the material is clamped firmly but not deformed

Answer 11

Clamp pressure

Question 12

What is used to form allowances on curved cheeks of light gauged metal?

Answer 12

A Power flanger

Question 13

Cross-breaking is done to add ______ to large flat surfaces of metal

Answer 13

Stiffness

Question 14

Converging angles and allowances must often be formed by what with pliers?

Answer 14

By Hand

Question 15

What does a standing drive joint provide?

Answer 15

Provides additional rigidity to the duct

Question 16

What duct connection simplifies fitting assembly and provides more rigidity?

Answer 16

A proprietary duct connection

Question 17

What is used to open S cleats before installing them

Answer 17

Screw driver

Question 18

Tacking a seam means:

Answer 18

Folding down the flange in intervals so it doesn’t come apart

Question 19

Properly finished seam shows what about the fabricator?

Answer 19

Professionalism

Question 20

The assembly of what fitting begins at the crotch for proper alignment

Answer 20

The Y-Branch fitting

Question 21

What does the Box-Pan break have that can be adjusted for forming one piece pans?

Answer 21

Adjustable Fingers

Question 22

To avoid stretching material, fold the flanges in ____

Answer 22

Stages when using a hammer

Question 23

What machine is used to roll curved runners for duct fittings?

Answer 23

Roll forming machine

Question 24

The corners of proprietary duct connections are joined with what?

Answer 24

Bolts or Special Clips

Question 25

What is used to isolate HVAC equipment from ductwork?

Answer 25

Flexible duct connection

Question 26

What do you do if no specifications are given for installing flexible connections?

Answer 26

SMACNA offers guidelines to help

Question 27

Stretch out of the material for round flex connector is:

Answer 27

Net pattern stretchout plus 1inch on either side

Question 28

Fire dampers must be ____ rated and cannot be ___

Answer 28

ULC, Modified

Question 29

Min and Max a Fire damper sleeve must extend out of the fire wall

Answer 29

3” min and 6” Max

Question 30

Gauge of metal to be used for a fire damper sleeve is based on the size of the duct and whether the sleeve is made as a what?

Answer 30

Rigid type or has break away connections

Question 31

The type of breakaway connection is usually set where?

Answer 31

In the Job Specifications

Question 32

The type of longitudinal seam is most often what?

Answer 32

The same as the ductwork that the fire damper sleeve connects too

Question 33

Roof jacks are commonly used when:

Answer 33

They need to penetrate the roof membrane

Question 34

Cylindrical roof jacks are pieces of what?

Answer 34

Round pipe

Question 35

The 2 most common seams to fasten a round body to a flashing plate are:

Answer 35

Hammerlock or the elbow seam

Question 36

Conical roof jacks require a different what?

Answer 36

Pattern development

Question 37

Rectangular roof jack bodies are seamed at:

Answer 37

A corner

Question 38

Seam locations on sloped roof should avoid:

Answer 38

The up slope part of the jack

Question 39

Edge at the bottom of the jack is to do what?

Answer 39

Stiffen them

Question 40

First period sealing will be done with what?

Answer 40

Silicone

Question 41

The hole in the flashing plate for a sloped jack will be:

Answer 41

Elliptical

Question 42

Conical cap shape is

Answer 42

Round

Question 43

The support legs should be mounted ____ to the cap

Answer 43

Perpendicular

Question 44

Support legs need tabs that bend at what angle towards the peak of the cap?

Answer 44

90 degrees

Question 45

Minimum edge distance for mechanical fasteners is what?

Answer 45

2 times the fastener diameter

Question 46

Lap seam allowance must be notched with a ___ of angle notch?

Answer 46

Transfer

Question 47

The body requires how many fasteners to keep the cap from twisting?

Answer 47

Two fasteners

Question 48

Roof jack body seam should be sealed how much of its length?

Answer 48

2 thirds of its length