F80 Water Supply and Fire Suppression 5

Question 1

What color are fire hydrant barrels typically painted to indicate they are privately owned and maintained?

Accepted Answer

Red

Answer

Red hydrant barrels typically indicate private ownership, though color coding can vary by jurisdiction; always verify local standards.

Question 2

A fire pump is sized to deliver 750 GPM at 100 psi. At churn (no-flow) condition, the pump discharge pressure should not exceed:

Accepted Answer

140% of rated pressure

Answer

NFPA 20 requires that at churn (shutoff) conditions, the pump pressure shall not exceed 140% of the rated net pressure.

Question 3

What is the function of a jockey (pressure maintenance) pump in a fire suppression system?

Accepted Answer

Maintain system pressure and detect small leaks

Answer

A jockey pump maintains baseline system pressure and cycles to compensate for minor leaks, signaling potential problems if it runs excessively.

Question 4

Which NFPA standard governs the installation of private fire service mains and their appurtenances?

Accepted Answer

NFPA 24

Answer

NFPA 24 covers the installation of private fire service mains and their appurtenances, including underground piping.

Question 5

When conducting a fire hydrant flow test, the 'pitot pressure' reading is used to determine:

Accepted Answer

Velocity pressure and calculate flow rate

Answer

A pitot gauge measures velocity pressure at the hydrant discharge opening, which is converted to flow rate (GPM) using standard formulas.

F80 Practice Test