Chapter 5: Exhaust Systems (Part I)

Question 1

A separate and distinct ventilation or exhaust system shall be provided for ____________.

Answer 1

Incompatible materials

Question 2

Duct systems operating at elevated temperatures above 140 degrees Fahrenheit shall have clearances from combustible materials of not less than _______ inch(es).

Answer 2

18 inches

Question 3

Every exhaust duct conveying explosive or flammable vapors, fumes or dusts shall terminate outside of the building with clearance to any openable window or fresh air intake of not less than ________ feet.

Answer 3

10 feet

Question 4

Galvanized steel and aluminum ducts shall not be used when temperature of the material exceeds _________ degrees Fahrenheit.

Answer 4

400 degrees

Question 5

For ducts conveying particulate matter, accessible cleanouts shall be provided intervals of ___________ feet.

Answer 5

10 feet

Question 6

Aluminum duct may be used in a Class ___________ system.

Answer 6

Class I

Question 7

Approved nonmetallic hoods and duct systems may be used for Class 5 corrosive systems when the corrosive mixture is __________.

Answer 7

nonflamable

Question 8

Liquid adhesive coatings used on listed air filters shall be of a type that will _____________.

Answer 8

Have a flash point of 350 degrees or higher

Question 9

Product conveying ventilation or exhaust systems shall be installed to control, capture, and remove emissions generated from product use or handling when required buy the ___________.

Answer 9

Building code or fire code

Question 10

Fittings in class 2, 3, and 4 product conveying duct systems shall be not less than _____________ gauge(s) thicker than the thickness required for straight runs.

Answer 10

2 gauges

Question 11

Sprinklers or other fire protection devices shall be installed within ducts having a cross-sectional dimension in excess of _________ inches when conveying flammable vapors or fumes.

Answer 11

10 inches

Question 12

To avoid vibration and stress on the duct, hangers and supports shall be securely fastened to __________.

Answer 12

The building or structure

Question 13

When a domestic clothes dryer is installed in a dryer, a minimum opening of ________ square inches for makeup air shall be provided.

Answer 13

100 sq. in.

Question 14

With all clearance in reduction system using a ventilated air space, air circulation shall be provided as described in Table ________________.

Answer 14

5-2

Question 15

When ducts are installed in a location where they are subject to physical damage, ducts shall be protected by _________.

Answer 15

Suitable guards

Question 16

A metal-joining that produces a product without visible interruption or variation in quality is __________.

Answer 16

A continuous weld

Question 17

Clothes dryers moisture exhaust ducts shall not exceed into or ___________,.

Answer 17

Through ducts or plenums

Question 18

Product-conveying ducts shall terminate a minimum of ________ feet above adjoining grade.

Answer 18

10 feet

Question 19

Motors for fans used to convey flammable vapors of dusts shall be located ___________<>

Answer 19

Outside the duct

Question 20

Electrical equipment used in operations that generate explosive or flammable vapors, fumes, or dusts shall be interlocked with the __________,

Answer 20

Ventilation system

Question 21

Exhaust hoods of steel shall have a base metal thickness not less than _________ gauge for Class 1 and Class 5 duct systems.

Answer 21

22 gauge

Question 22

Flexible duct connectors for clothes dryers shall not exceed _______ feet in length.

Answer 22

6 feet

Question 23

In ducts having a cross-sectional dimension exceeding 10 inches that convey flammable vapors or fumes, sprinklers shall be installed at _______ foot intervals in horizontal ducts and changes in direction

Answer 23

12 foot

Question 24

In general, ducts used for domestic kitchen range ventilation and domestic clothes dryers shall be made of _________ and shall have ________ surfaces.

Answer 24

Metal, smooth interior

Question 25

For product-conveying service, galvanized steel and aluminum ducts shall not be used when the temperature of the material being conveyed exceeds _________ degrees F.

Answer 25

400 degrees

Question 26

Environmental air ducts shall terminate at least _________ feet from the property line.

Answer 26

3 feet

Question 27

Ventilation systems used for removal of vapors, gases, and smoke shall be designed using which method(s)?

Answer 27

THe constant velocity or equal friction methods

Question 28

Not more than _______ of 6-inch diameter PVC coupling may protrude above the concrete floor surface.

Answer 28

1 inch

Question 29

Underfloor trenches in which PVC exhaust ducts are installed shall have backfill material composed of ________.

Answer 29

Sand or gravel

Question 30

When a closet is designed for the instillation of a clothes dryer, a minimum opening of ________ square inches for makeup air shall be provided in the door or by other approved means.

Answer 30

100 sq. inches

Question 31

The use of rectangular ducts for conveying particulates shall be _________<>

Answer 31

Subject to the approval of the Building Official

Question 32

Ducts fior exhausting clothes dryers shall not be connected or installed with ________.

Answer 32

Metal screws or fasteners that will obstruct the flow

Question 33

When a compartment or space for a domestic clothes dryer is provided, a minimum _________ diameter moisture exhaust duct of approved material shall be installed.

Answer 33

4 inch