TB 12 Automatic Sprinkler systems

Question 1

TB 12 Automatic Sprinkler systems

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

TB 12 Automatic Sprinkler systems

Pump operators should then deliver 100p.s.i. to the inlet if no fire is showing. If it is obvious that a fire is in progress and a number of heads have opened, pump pressure should be increased to 150 p.s.i.

Answer 2

reference

Question 3

TB 12 Automatic Sprinkler systems

“Junior systems” may be encountered from time to time which are designed to provide simple, inexpensive protection for light hazard occupancies where not over three or four sprinklers are likely to operate. The system is connected directly to the service water supply through a one-inch brass pipe and electric water flow alarm. There is no fire department connection or drain valve.

Answer 3

reference

Question 4

TB 12 Automatic Sprinkler systems

Junior Systems

The system itself is a loop of three-fourths of an inch or one inch of copper tubing fitted with small orifice (_____ of an inch or _____ of an inch) sprinklers They will discharge about _____ as much water as the standard one-half inch sprinkler, and are distinguished by a pintle extending beyond the center of the deflector. (For identification purposes only.)

Answer 4

1/4 or 3/8”

1/2

Question 5

TB 12 Automatic Sprinkler systems

Junior system

3/4” or 1” Pipe w/ 1/4 or 3/8 Sprinkler head

Discharge half as much as normal head

Have a pintle to ID

Answer 5

reference

Question 6

Normally, one and one-half inch lines are sufficient in sprinklered buildings.

Answer 6

reference