Week 7

Question 1

Hydrostatic test is?

Answer 1

200 psi/ 2hours

Question 2

Systems normally subject to system working pressure over 150 psi shall be tested at?

Answer 2

50 psi in excess of system pressure

Question 3

How can you test if there is a major drop in temperature anticipated?

Answer 3

An interim air test is permitted at 40psi for 24h. The hydrostatic test is still required at a better time.

Question 4

When conducting a hydrostatic test where shall the test gauge be located?

Answer 4

Lowest elevation point because it’s under the most pressure

Question 5

Initial installation of an FDC test is conducted at?

Answer 5

200psi or 50 psi in excess of maximum static pressure.

Question 6

Dry pipe and double interlock preaction systems must be tested with?

Answer 6

Air and water. 200 psi/ 2h water, 40 psi/ 24h air 1 1/2 psi allowable leakage

Question 7

An audible alarm is required in?

Answer 7

5 minutes

Question 8

Main drain tests are to be performed?

Answer 8

Annually

Question 9

Where can a wet system be installed?

Answer 9

Sprinkler systems shall be wet systems unless areas are subject to freezing or other special conditions.

Question 10

State two advantages of a wet system?

Answer 10

Most reliable, cost effective, easy to maintain.

Question 11

Where shall the inspectors test of a wet system be located?

Answer 11

Installed downstream of the water flow alarm, furthest point is preferred.

Question 12

State two items which must be present in all wet system valve rooms?

Answer 12

Lighted, and heated.

Question 13

What are two alarm devices that a wet system may contain?

Answer 13

Flow paddle switch, low pressure alarm switch ps120, alarm valve ps10

Question 14

State how many sprinkler heads must operate in order to initiate an alarm?

Answer 14

Just one

Question 15

Identify the amount of pitch required on the piping of a wet system.

Answer 15

Shall be permitted to be installed level

Question 16

What device must be installed on an antifreeze system which is connected to a potable water supply to protect the water

Answer 16

Backflow prevention device

Question 17

State some possible areas that an antifreeze system would be installed to protect

Answer 17

Often used to protect smaller portions of a wet system from freezing.

Question 18

State the maximum size of an antifreeze system?

Answer 18

40 gal

Question 19

State the device added to allow for expansion when a reduced pressure backflow preventer is installed.

Answer 19

Expansion chamber to compensate for thermal expansion.

Question 20

State the minimum drop of an antifreeze loop when using a non potable water supply

Answer 20

5 ft

Question 21

State the purpose of the 1/32” hole in the check valve of the antifreeze loop

Answer 21

To allow for expansion

Question 22

State the frequency antifreeze solutions shall be tested

Answer 22

Annually

Question 23

Where are dry systems normally installed.

Answer 23

Areas subject to freezing.

Question 24

What’s the maximum number of gallons which may be trapped before a dry system auxiliary drain is installed?

Answer 24

5 gallons

Question 25

What is the size of a light or ordinary wet system.

Answer 25

52,000 ft2

Question 26

What clearance must a valve room have from all panels or system valves?

Answer 26

36”

Question 27

Valve room enclosure must have drainage twice the size of the drain true / false

Answer 27

True

Question 28

What size pressure gauge must be used?

Answer 28

Rated for twice rated pressure

Question 29

Where must pressure gauges be installed?

Answer 29

Below alarm valve or riser check, Above Alarm valve or riser check valve

Question 30

Where is a relief valve required in wet systems?

Answer 30

Downstream of any check valve

Question 31

Minimum relief valve size?

Answer 31

1/2”

Question 32

Where is an air vent required?

Answer 32

On all wet systems, installed at highest point.

Question 33

Where is the main drain located?

Answer 33

Downstream of the control valve

Question 34

5 - 50 gal of trapped water must have an auxiliary drain valve of what size

Answer 34

3/4

Question 35

When’s are auxiliary drains tested

Answer 35

Annually, and quarterly to confirm and exercise internal components. Or whenever a control valve has been closed and re opened

Question 36

What are two system audible alarms

Answer 36

Water motor gong, electric bell

Question 37

When shall system alarms be tested

Answer 37

Inspect quarterly, test quarterly

Question 38

Where do you test system alarms?

Answer 38

From the inspectors test connection

Question 39

Anti freeze solutions?

Answer 39

Glycerin (plastic), and propylene glycol

Question 40

How long shall an air compressor take to fill a system?

Answer 40

30 minutes, 60 minutes in a refrigerated space maintained below 5* F ( -15* C)

Question 41

Air supply connections shall be sized at

Answer 41

Min 1/2” above priming level of the valve

Question 42

What’s the drain size of an exhauster

Answer 42

2”

Question 43

How soon shall water be at an ITV in a dwelling unit

Answer 43

15 seconds

Question 44

Not greater than 500gal shall be permitted without a Q.O.D true/false

Answer 44

True

Question 45

750gal or more shall have a Q.O.D true/ false

Answer 45

True

Question 46

What is the pitch for areas subject to freezing?

Answer 46

1/2” per 10’ for branch lines and 1/4” for mains

Question 47

What is the pitch required for refrigerated areas?

Answer 47

1/2” per 10’ for branch lines and mains

Question 48

Where shall a dry pipe FDC be installed?

Answer 48

Between system control valve and the dry pipe valve

Question 49

Describe two tail end systems which may be connected to a wet system

Answer 49

Antifreeze loop, pre action system, deluge system, dry system

Question 50

State two antifreeze solutions permitted to be used with potable water supply

Answer 50

Glycerin, propylene glycol

Question 51

State the type of control valve that must be used on a reduced pressure back flow preventer

Answer 51

Supervised, indicating control valve.