Water Supply, Distribution and Heaters

Question 1

True or False:

When an existing metal pipe is used for electrical grounding, that pipe can be replaced with plastic, and the grounding may be left disconnected.

Answer 1

False

Question 2

What is not considered an option for an individual water supply?

Answer 2

surface water

Question 3

Fill in the blank:

Where pumps for individual water supply are installed in basements, the pump must be mounted not less than ______ inches above the floor.

Answer 3

18 inches

Question 4

Fill in the blank:

The required horizontal separation distance for a water service pipe from a building sewer shall not apply if the water service pipe is a minimum of ______ inches above the building sewer.

Answer 4

12

Question 5

What is the minimum flow rate in gallons per minute for a private lavatory?

Answer 5

0.8

Question 6

What is the minimum flow pressure in psi for a bathtub?

Answer 6

20

Question 7

What is the maximum flow rate for a water closet per flush cycle?

Answer 7

1.6 gpm

Question 8

What is the maximum static water pressure to be allowed within the building?

Answer 8

80 psi

Question 9

What is the minimum fixture water supply pipe size for a bathtub?

Answer 9

1/2 inch

Question 10

Fill in the blank:

A water hammer arrestor shall be installed where ______ valves are utilized.

Answer 10

quick-closing

Question 11

Fill in the blank:

______ shall be provided to all flexible water connectors.

Answer 11

Access

Question 12

Where is a full-open valve not required?

Answer 12

fixture supply

Question 13

Fill in the blank:

Overflow outlets for water supply tanks shall discharge to a point not less than ______ inches above the roof.

Answer 13

6

Question 14

What is the drain pipe diameter for a water supply tank with a tank capacity of 1600 gallons?

Answer 14

2 inches

Question 15

Fill in the blank:

A thermal expansion control device is to connect to the water heater ______ pipe.

Answer 15

cold water supply

Question 16

Which device is not to be installed for high hazard backflow situations?

Answer 16

dual-check-valve

Question 17

Fill in the blank:

A water softener drain connection shall be connected to the waste system through ______.

Answer 17

an air gap

Question 18

What is not an approved method for protecting a backflow preventer from freezing?

Answer 18

installed below ground

Question 19

What is not an approved method for protecting the potable water supply in a lawn irrigation system?

Answer 19

air gap

Question 20

When disinfecting a potable water system with a chlorine concentration of 50 PPM, how long shall the chlorine stand in the system?

Answer 20

24 hours

Question 21

When potable water is being used to heat space, what is the maximum temperature of the hot water allowed to be supplied at the potable water fixtures?

Answer 21

140 degrees F

Question 22

True or False:

A water heater drain valve is required to be provided with female garden hose threads.

Answer 22

False

Question 23

True or False:

Water heaters and storage tanks should be positioned so that the markings on the tank can be accessed for inspection or reinspection.

Answer 23

True

Question 24

Fill in the blank:

When installed in an attic, water heaters shall be provided with a passageway not less than ______ inches in height.

Answer 24

30

Question 25

# Fill in the blank: When installed in an attic, water heaters shall be provided with a passageway with a continuous solid floor not less than \_\_\_\_\_\_ inches in width.

Answer 25

24

Question 26

# Fill in the blank: All water heaters shall be provided with a level working space not less than \_\_\_\_\_\_ inches in length and width in front of the control side of the water heater.

Answer 26

30

Question 27

# Fill in the blank: Access to the cold water valve for a water heater shall be \_\_\_\_\_\_.

Answer 27

on the same floor level

Question 28

# True or False: A pressure relief valve is an approved means for controlling thermal expansion.

Answer 28

False

Question 29

What is the maximum temperature setting for a temperature and pressure relief valve on a water heater?

Answer 29

210 degrees F

Question 30

# True or False: The discharge pipe serving a temperature and pressure relief valve shall not be smaller than the diameter of the outlet of the valve served.

Answer 30

True

Question 31

# Fill in the blank: The discharge pipe for a temperature and pressure relief valve serving a water heater shall terminate not more than \_\_\_\_\_\_ inches from the floor.

Answer 31

6

Question 32

# True or False: A plastic pan may be installed beneath a gas-fired water heater.

Answer 32

False

Question 33

# True or False: Where a pan drain was not previously installed, a pan shall not be required for a replacement water heater installation.

Answer 33

True

Question 34

# Fill in the blank: The termination of a drain from a water heater pan shall not be more than \_\_\_\_\_\_ inches above the place of termination.

Answer 34

24 inches

Question 35

What is the insulation **R-value** requirement for unfired hot water storage tanks?

Answer 35

R 12.5