Cladding And Lagging TQ Prep

Question 1

What is the discharge angle of a gooseneck ventilator?

Answer 1

135°

Question 2

What is the minimum height of the bottom straight section of a gooseneck ventilator above the base of a roof in heavy snowfall areas?

Answer 2

18”

Question 3

What provides the main protection against rain, snow, and ice accumulation on the roof?

Answer 3

Roof curbs placed around the opening of the roof.

Question 4

How often is the Alberta Building Code (ABC) republished?

Answer 4

Every 4 years.

Question 5

What guidelines does the Alberta Building Code refer to?

Answer 5

SMACNA guidelines.

Question 6

What are louvres designed to do?

Answer 6

Provide airflow into a building while keeping out moisture, birds, and insects.

Question 7

What type of louvre blades are better at removing excess moisture?

Answer 7

Blades designed with a profile shape that has extra bends or folds.

Question 8

How is the gooseneck ventilator hood attached?

Answer 8

It includes a straight section of duct that is fastened mechanically to the curb and sits 12” above the curb flashing.

Question 9

What finishes can rolls of stainless steel cladding be ordered with?

Answer 9

Stucco embossed, smooth, 3/16” corrugated, or corrolon.

Question 10

What are Pressed Elbows sized to cover?

Answer 10

Insulated 90° and 45° elbows.

Question 11

What is the minimum lap for covering pipe insulation with aluminum?

Answer 11

50mm (2”) minimum.

Question 12

Where should the lap for cladding on a horizontal pipe be placed?

Answer 12

Away from prevailing winds at 2 O’ clock.

Question 13

What is the purpose of moisture barriers applied to aluminum?

Answer 13

To provide protection against corrosion.

Question 14

Why can stainless steel cladding be used instead of aluminum?

Answer 14

For chemical and fire resistance.

Question 15

How should aluminum be fastened on insulated tanks with excessive expansion and contraction?

Answer 15

With steel bands and expansion springs.

Question 16

What should be used to prevent corrugated sheets from sliding down on a vertical tower?

Answer 16

S Clips.

Question 17

What measurements are required for the layout of a bevel?

Answer 17

OD of pipe, OD of insulation, Crimp.

Question 18

Which dimensions are placed into the square to lay out aluminum bevels?

Answer 18

One half of the outside diameter of pipe, one half of the OD of the pipe insulation, and the amount of crimp.

Question 19

Which layout method is used to layout a gore pattern?

Answer 19

Parallel line development.

Question 20

What is the primary use for caulking in cladding?

Answer 20

To prevent water from getting into the insulation.

Question 21

What are the types of cladding end caps?

Answer 21

Crimp type/two piece, Crimper type end cap, Lock form end cap.

Question 22

At what angle are bevels cut where the insulation ends?

Answer 22

45°.

Question 23

What dimension do most pipe sizes refer to?

Answer 23

The inside diameter of the pipe, also known as the callout size.

Question 24

What are end caps used for?

Answer 24

To cover insulation where the insulation ends.

Question 25

What should be allowed for if the end cap is going over the metal?

Answer 25

Watershed.

Question 26

What is the minimum overlap for all overlapping vertical sheeting?

Answer 26

75mm (2”).

Question 27

What should be used to suspend one vertical pipe on another?

Answer 27

S clips.

Question 28

What is the minimum lap required on all materials?

Answer 28

50mm (2”).

Question 29

What are pop rivets?

Answer 29

Permanent mechanical fasteners that don’t vibrate or loosen over time like screws.

Question 30

What are tear drops used for?

Answer 30

To support the banding between sheets.

Question 31

What must be used when cutting back insulation at a 45° angle?

Answer 31

Metal bevels to cover the ends.

Question 32

What are muffle jackets?

Answer 32

An inside rubber liner added to lower sound levels.

Question 33

What types of protection are there in cladding or lagging?

Answer 33

Weatherproofing, fireproofing, chemical resistant, soundproofing.

Question 34

What is the most common cladding material?

Answer 34

Aluminum.

Question 35

What do moisture barriers prevent?

Answer 35

Chemical attack at the metal insulation interface.

Question 36

What are gore elbows mainly used on?

Answer 36

Large mitres elbows, sweeps, or where it is difficult or impractical to use pressed elbows.

Question 37

Where should bevels be installed in relation to removable objects?

Answer 37

At bolt length, plus 25mm (1”) away from all removable objects.