Deluge & Pre-Action Valves

Question 1

How is the operation of a deluge valve controlled

Answer 1

By release of water in the priming chamber

Question 2

3 styles of detection lines that we can utilize for deluge and pre action valves are

Answer 2

1. Hydraulic
2. Pneumatic
   3.Electric

Question 3

What allows the seat to remain closed

Answer 3

Differential force generated within the deluge valve priming chamber

Question 4

The differential is typically designed to produce _____ as much force in the priming chamber as the supply water pushing against

Answer 4

Twice

Question 5

Pressure relief can be omitted for single interlock when

Answer 5

The air supply is not capable of developing more then 15psi

Question 6

Max size single interlock

Answer 6

1000 heads

Question 7

Max size non interlock

Answer 7

1000 heads

Question 8

Max size double interlock

Answer 8

500 gallons

Question 9

Which interlock system cannot be gridded

Answer 9

Double interlock

Question 10

Air leakage “maintenance” test consists of

Answer 10

40 psi for 2 hours, 3 psi max loss

Question 11

Class A- ordinary combustibles- symbol and colour

Answer 11

Green triangle

Question 12

Class B - Flammable liquids- symbol and colour

Answer 12

Red square

Question 13

Class C - live electrical- symbol and colour

Answer 13

Blue circle

Question 14

Class D - Flammable metals- symbol and colour

Answer 14

Yellow star

Question 15

Class K- Kitchen components- symbol and colour

Answer 15

Black octagon