Wet Systems Quiz1

The functions of the main drain connection and valve are to drain the system_______.

• and test the water supply

• and keep the piping from freezing

• only

• and to check anti-freeze solution

When performing main drain testing, the valve shall be opened and remain open______.

• just for a quick second

• until the system pressure stabilizes

• for 2 seconds

• until the needle drops 10 PSI

Per NFPA requirements, after an impairment, a main drain test shall be performed________.

• if there is a concern by the AHJ and requires it for occupancy

• any time a valve is closed for more than a week

• after a shutdown of over 48 hours or 2 days

• any time the control valve is closed and reopened at system riser

The initial main drain test is critically important to perform and document because_______.

• it is the benchmark to compare future test data to

• the insurance company requires the test for their records

• it proves to the general contractor that the system is live

• . it provides the final flush of the system before we finish the job

Per NFPA 25, a main drain test on a system containing no backflow preventer must be performed at least _______.

• weekly

• monthly

• quarterly

• annually

Per NFPA 13 requirements, fire sprinklers are to be identified by the

• Pipe thread size

• Piping connection type

• Sprinkler Identification Number (SIN)

• UL Listing number

Answer explanation

6.2.2* Sprinkler Identification. All sprinklers shall be permanently

marked with one or two English uppercase alphabetic

characters to identify the manufacturer, immediately followed

by three or four numbers, to uniquely identify a sprinkler as to

K-factor (orifice size) or orifice shape, deflector characteristic,

pressure rating, and thermal sensitivity.

Per NFPA 13:For a new fire sprinkler system installation, working plans shall be submitted to the AHJ for approvals_____

Per NFPA 13, any changes in the fire sprinkler project from the approved working plans require______.

• permission from the AHJ

• approval from the owner

• approval from the NFPA

• review from the other trades on the project

Answer explanation

23.1.2 Deviation from approved plans shall require permission

of the authority having jurisdiction.