Job Information Level 2: Lesson 9 Fire-Resistant Wall and Floor Assembly Penetrations

Question 1

What National Electrical Code (NEC) chapter covers the requirements for firestopping?
Select one:

a.
1

b.
2

c.
3

d.
5

Answer 1

3

Question 2

A cable assembly that enters a fire resistive wall and exits the opposite side of the wall is considered to be a ? penetration.
Select one:

a.
joint

b.
membrane

c.
passive

d.
through

Answer 2

Through

Question 3

When penetrating a concrete fire-resistive wall or floor assembly with RMC, it is not acceptable to use mortar to fill the annular space.
Select one:
True
False

Answer 3

False

Question 4

When a conduit passes through only one side of a fire-resistive wall assembly, it is considered as a ? penetration.
Select one:

a.
joint

b.
membrane

c.
passive

d.
through

Answer 4

Membrane

Question 5

A listed electrical box for use in fire-resistive assemblies is being installed in a two-hour rated wall. Assuming there are no other electrical boxes on the opposite side of the wall, this installation does not require any penetration protection as long as the annular space between the electrical box and the wall membrane does not exceed ? .
Select one:

a.
1/16”

b.
1/8”

c.
1/4 “

d.
3/8 “

Answer 5

1/8 “

Question 6

A listed through penetration that identifies a specific manufacturer’s intumescent caulk can be installed using a different manufacturer’s caulk as long as which of the following requirements are met?
Select one:

a.
The caulk has the same ingredients.

b.
The foreman determines it to be suitable.

c.
The complete through penetration has been tested and listed with the different manufacturer’s caulk.

d.
None of the above.

Answer 6

The complete through penetration has been tested and listed with the different manufacturer’s caulk.

Question 7

Penetrations made in a(n) ? require an L rating with the approved firestop system.
Select one:

a.
firewall

b.
fire partition

c.
smoke barrier

d.
smoke partition

Answer 7

Smoke barrier

Question 8

During the ASTM E 814/UL 1479 fire test, temperatures may reach as high as ? during a four-hour period.
Select one:

a.
1,700°

b.
1,925°

c.
2,000°

d.
2,300°

Answer 8

2,000°

Question 9

The temperature requirement that a one-hour fire-resistive assembly must withstand during the ASTM E 814/UL 1479 is ? .
Select one:

a.
1,700°

b.
1,925°

c.
2,000°

d.
2,300°

Answer 9

1,700°

Question 10

The temperature requirement that a four-hour fire-resistive assembly must withstand during the ASTM E 814/UL 1479 is ? .
Select one:

a.
1,700°

b.
1,925°

c.
2,000°

d.
2,300°

Answer 10

2,000°

Question 11

The ? rating indicates the length of time (in hours) that the firestop assembly will not exceed 325°F on the unexposed surface during the fire test.
Select one:

a.
F

b.
L

c.
T

d.
W

Answer 11

T

Question 12

The ? rating indicates the length of time that the firestop system is able to prevent the passage of fire and heat through the opening in an assembly.
Select one:

a.
F
Correct

b.
L
Incorrect

c.
T
Incorrect

d.
W

Answer 12

F

Question 13

Which of the following is not included in a complete through penetration firestop system?
Select one:

a.
The backing material (mineral wool, insulation etc.)

b.
The fire-resistance rated assembly (wall/floor) materials

c.
The penetrating item (conduit, cable tray etc.)

d.
The sealant (caulk, putty, etc.)

e.
None of the above

Answer 13

None of the above

Question 14

Wood framed assemblies cannot be classified as fire-resistant assemblies.
Select one:
True
False

Answer 14

False

Question 15

Through penetrations in concrete floor assemblies can have the annular space filled with mortar provided that the penetrating item is ? .
Select one:

a.
HVAC duct

b.
metallic pipe

c.
PVC pipe (schedule 80)

d.
All of the above

Answer 15

Metalli pipe

Question 16

When testing a through penetration system, UL tests various different manufacturers’ products in the assembly. This process allows flexibility for the installer to choose from various manufacturers’ products.
Select one:
True
False

Answer 16

False

Question 17

Where can an Electrical Worker find information on listed through penetration systems?
Select one:

a.
Manufacturer specifiers’ guides or catalogs

b.
Manufacturer websites

c.
UL Fire Resistance Directory

d.
Any of the above

Answer 17

Any of the above

Question 18

Which of the following through penetration systems represents a wall is being penetrated?
Select one:

a.
W-L-1453
Correct

b.
F-W-1325
Incorrect

c.
F-C-1293
Incorrect

d.
Both b. and c.

Answer 18

W-L-1453

Question 19

Which of the following through penetration systems represents framed wall construction?
Select one:

a.
W-L-1453

b.
F-W-1325

c.
F-C-1293

d.
W-J-1625

Answer 19

W-L-1453

Question 20

A listed through penetration system that identifies a metallic pipe penetrating the fire-resistant assembly has a numeric value in the system number of ? .
Select one:

a.
0000-0999

b.
1000-1999

c.
2000-2999

d.
3000-3999

Answer 20

`1000-1999

Question 21

Which of the following is a false statement regarding engineering judgments?
Select one:

a.
An EJ can only be used for a specific job.

b.
An EJ does not need to be approved by the authority having jurisdiction (AHJ).

c.
An EJ is based on currently listed through penetration systems.

d.
An EJ must be issued by a qualified fire professional.

Answer 21

An EJ does not need to be approved by the authority having jurisdiction (AHJ).

Question 22

Which of the following is not a common type of firestop material?
Select one:

a.
Endothermic tape

b.
Intumescent wraps

c.
Putty

d.
Pillows

Answer 22

Endothermic tape

Question 23

What type of firestopping technology expands as much as 25 times in volume?
Select one:

a.
Ablative

b.
Endothermic

c.
Insulative

d.
Intumescent

Answer 23

Intumescent

Question 24

What type of firestopping material releases chemically bound molecules of water when exposed to heat?
Select one:

a.
Ablative

b.
Endothermic

c.
Insulative

d.
Intumescent

Answer 24

Endothermic

Question 25

When selecting a through penetration system, which of the following questions need to be considered?

I. How much will the material cost?
II. Is the penetration temporary or permanent?
III. What is the annular space of the opening?
IV. What is the hourly rating of the assembly?
V. What type of fire rated assembly is being penetrated?

Select one:

a.
I., III., and IV.

b.
II., III., and IV.

c.
III., IV., and V.

d.
I., II., III., IV., and V.

Answer 25

III., IV., and V.