TB 12 Automatic Sprinkler Systems

Question 1

Records show that __ of all fires in sprinklered buildings are extinguished or satisfactorily held in check by the sprinkler system.

Answer 1

96%

Question 2

NBFU Bulletin No. 270 suggests that “one of the first fire alarm engine companies responding….. should lay ___ into the fire department connection.”

Answer 2

two 2 ½ “ lines

Question 3

Pump operators should then deliver __ to the inlet if no fire is showing.

Answer 3

100p.s.i.

Question 4

If it is obvious that a fire is in progress and a number of heads have opened, pump pressure should be increased to ____.

Answer 4

150 p.s.i.

Question 5

Normally, _____ lines are sufficient in sprinklered buildings.

Answer 5

one and one-half inch

Question 6

“Junior systems” may be encountered from time to time which are designed to provide simple, inexpensive protection for light hazard occupancies where not over ___ are likely to operate.

Answer 6

three or four sprinklers

Question 7

Junior System:

The system is connected directly to the service water supply through a ___ and electric water flow alarm

Answer 7

one-inch brass pipe

Question 8

Junior System:

There is ____ fire department connection or drain valve.

Answer 8

no

Question 9

Junior System:
The system itself is a loop of three-fourths of an inch or one inch of copper tubing fitted with small orifice ____ sprinklers

Answer 9

(one-fourth of an inch or three- eighths of an inch)

Question 10

Junior System:
They will discharge about ___ as much water as the standard one-half inch sprinkler, and are distinguished by a pintleextending beyond the center of the deflector.

Answer 10

one-half