High Rise Water Systems

Question 1

Pre-60 inlets

Answer 1

(2) 2 1/2 inlets if 4-5 stories. (4) 2 1/2 inlets if 6 stories or more

Question 2

Pre-60 riser

Answer 2

4-6 inch riser rated at 500 GPM per riser

Question 3

Pre-60 Classes

Answer 3

Class 1 Dry, Class 2 Wet

Question 4

60-74 less than 150 feet?

Answer 4

Same as Pre-60

Question 5

60-74 above 150 feet?

Answer 5

Class III Combination Standpipe

Question 6

60-74 inlets

Answer 6

(4) 2 1/2 inlets. (6) 2 1/2 inlets if 3 or more risers

Question 7

60-74 risers

Answer 7

6 inch riser rated at 1000 GPM per riser

Question 8

orifice plates

Answer 8

metal like washer device designed to lower pressure rated at 200 gpm at 45 psi.

Question 9

orifice plates found at pressures above ___

Answer 9

135 psi

Question 10

60-74 water supply

Answer 10

primary - domestic / secondary - LAFD

Question 11

74 to Present 75-150’

Answer 11

Damp system, On site water calculated sprinkler flow of most demanding area for 30 minutes + 100 GPM

Question 12

74 to Present 75-150’ (Pressure Restricting Valve)

Answer 12

found when pressure is between 135 to 150 PSI

Question 13

74 to Present 150-275’ onsite water

Answer 13

Calculated for standpipe demand + 500 GPM for 1st riser and 250 GPM for each additional riser.

Question 14

74 to Present over 275’ onsite water

Answer 14

45K - 105K gallon water tank

Question 15

74 to Present over 150 (Pressure Regulating Device)

Answer 15

Found when pressure exceeds 150 psi, provides 80-125 psi at 300 GPM

Question 16

Mercoid pressure switch

Answer 16

the policy in LA for the Stop pressure is set 10 psi below system pressure and START pressure is set 50 psi below the system pressure

Question 17

Dry standpipe outlets are located based on requirement

Answer 17

That every point within the structure must be reachable by a 30’ stream of water from a nozzle attached to 100’ of hose

Question 18

Jockey pumps

Answer 18

installed to make up minor leakages rates in system pressure.

Question 19

Jockey pumps prevent

Answer 19

the fire pump from continually starting and stopping due to the minor fluctuation in the system pressure

Question 20

Looped system (except 1983 - 1988 )

Answer 20

water for a given sprinkle head is delivered from two or more risers

Question 21

Exception to the looping between 1938-1988 was due to the

Answer 21

Uniform building code in 1983

Question 22

Uniform building code in 1983

Answer 22

did not require two separate points of connections for sprinklers

Question 23

Buildings under construction…. every building ____ stories or more shall be provided with not less than ___ standpipe for use during construction

Answer 23

6 stories or more, Not less than 1 standpipe

Question 24

The standpipe shall be installed when the progress of construction is not more than ____ in height

Answer 24

50’

Question 25

Such standpipe shall be provided with a ____ on each floor adjacent to useable stairs

Answer 25

2 1/2” outlet

Question 26

Such standpipe shall be extended as construction progresses to within ___ floor of the highest point of construction having _____

Answer 26

One / having secure decking or flooring

Question 27

Where construction heights requires installation of combination standpipe…

Answer 27

fire pumps and water main connections shall be provided to serve standpipe

Question 28

Once the standpipe exceeds ____

Answer 28

150’ a temporary manually started fire pump shall be installed.

Question 29

Jockey pumps should be set to operate

Answer 29

at a pressure of 5 to 10 psi higher than the main pumps starting pressure

Question 30

Fuel supply: there must be a separate ____ for each engine

Answer 30

fuel line and fuel supply tank

Question 31

On new high rise post 74 : minimum fuel supply

Answer 31

8 hours

Question 32

On existing high rise 60-74: minimum fuel supply

Answer 32

4 hours