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WorksheetsNFPA 13 Chapter 8 Obstructions
Total questions: 18
Worksheet time: 9mins
Name
Class
Date
1.
According to section 8.1 of NFPA 13: Sprinklers shall be positioned and located so as to provide ____ performance with respect to activation time and distribution
a)
perfect
b)
satisfactory
c)
unobstructed
d)
unacceptable
2.
According to section 8.1 of NFPA 13, sprinklers________be installed inside air handing units not intended for occupancy.
a)
shall
b)
should
c)
are not required
d)
should never
3.
According to NFPA 13, the two ways to deal with obstructions are to locate sprinklers to minimize obstructions to discharge per the requirements, or________.
a)
install additional sprinklers to ensure adequate coverage
install additional sprinklers to ensure adequate coverage
b)
more water pressure is required to ensure greater coverage
c)
larger orifice sprinklers to be installed to ensure greater spray density on the hazard
d)
larger pipe sizes installed to give more water available to the sprinkler
4.
Obstructions to sprinkler pattern development are defined as: Continuous or noncontinuous obstructions less than or equal to____inches below the sprinkler deflector that prevent the pattern from fully developing.
a)
6
b)
12
c)
18
d)
24
5.
Obstructions that prevent the sprinkler dicharge from reaching the hazard are Continuous or noncontinuous obstructions that interrupt the water discharge in a horizontal plane____ below the sprinkler deflector in a manner to limit the distribution from reaching the protected hazard.
a)
less than 18 inches
b)
more than 18 inches
c)
more than 24 inches
d)
more than 36 inches
6.
Per NFPA 13, sprinklers are required under fixed obstructions over___ feet wide.
a)
2
b)
3
c)
4
d)
5
7.
Open grate flooring over 4 feet in width_________.
a)
shall require protection under the flooring
b)
should have protection under the flooring
c)
requires protection under the flooring in high hazard occupanices only
d)
is not required to be protected
8.
For standard pendent and upright sprinklers, the clearance from the sprinkler deflectors to the top of storage shall be____inches or greater.
a)
6
b)
12
c)
18
d)
24
9.
For special sprinklers, clearance of ___ inches or greater from the sprinkler deflector to the top of storage is permitted.
a)
18
b)
24
c)
36
d)
48
10.
The allowable distance for the deflector above a continious obstruction to discharge that is located 6 inches away from a sprinkler is____inches.
a)
0
b)
6
c)
12
d)
18
11.
Per NFPA 13,sprinklers shall be permitted to be spaced on opposite sides of the obstruction where the distance from the centerline of the obstruction to the sprinklers does not exceed_____ the allowable distance between sprinklers
a)
1/2
b)
1/3
c)
1 1/2 times
d)
2 times
12.
To avoid obstruction, if you have an obstruction located along the wall 20 inches wide, with a pendent sprinkler with the deflector located 5 inches above the bottom of the obstruction, the sprinkler must be at least_____inches away from the side of the obstruction
a)
6
b)
12
c)
15
d)
17
13.
A cabinet 22 inches wide is located along the wall. A pendent sprinkler is within the maximum allowable distance from the wall the cabinet is installed. The deflector of the sprinkler is 18 inches above the bottom of the cabinet. What needs to be done?
a)
The sprinkler needs to be moved away from the side of the cabinet
b)
Nothing.No additional protection is required
c)
A sprinkler needs to be installed under the cabinet
d)
A sprinkler needs to be installed inside the cabinet
14.
A standard pendent sprinkler is near a rectangular vertical column. The column measures 6 by 7 inches. The sprinkler should be located at least_______inches away horizontally to avoid obstruction.
a)
6
b)
12
c)
18
d)
21
15.
For an obstruction such as a large moveable conference table, the addtional protection required is_______.
a)
additional sprinklers at both ends of the table
b)
one additional sprinkler underneath the table
c)
additional sprinklers overhead around the table
d)
Nothing. No additional protection is required.
16.
A standard sprinkler near a vertical column that measures 4 inches by 5 inches must be at least____inches horizontally away to avoid obstruction.
a)
12
b)
15
c)
20
d)
24
17.
A standard upright sprinkler is near a bar joist. The joist bottom flange dimensions are 6 inches by 3 inches wide. The sprinkler deflector must be at least______inches away from the flange to avoid obstruction
a)
12
b)
18
c)
20
d)
24
18.
A standard sprinkler in a light hazard occupancy is located 6 inches away horizontally from a suspended sign that is an obstruction. The sign must be at least_____inches vertically below the sprinkler deflector to avoid obstruction.
a)
3
b)
6
c)
12
d)
18
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