BOF Mod B Final Exam Questions with
Correct Answers
Per NFPA, how much water would a hydrant with a red bonnet flow?
1500 gpm or more
1000-1499 gpm
500-999 gpm
Less than 500 gpm
Less than 500 gpm
During hydrant testing, your crew takes a reading from a gauge on a charged hydrant that is not
flowing water. What type of reading is being obtained?
Static flow
Static pressure
Flow pressure
Water volume
Static pressure
,Which statement is true of dry barrel hydrants?
Whenever the hydrant is not in use, the barrel remains filled with pressurized water.
When the hydrant is fully closed, the drain is fully open.
When the hydrant is fully closed, the drain is also fully closed.
An opening at the top of the barrel allows the water to drain out after each use.
When the hydrant is fully closed, the drain is fully open.
Which part of a dry barrel hydrant is turned in order to charge the hydrant with water?
Bonnet
Barrel
Stem nut
Steamer port
Stem nut
More pressure is required to push water through a 1-inch pipe than is required to push water
through a 3-inch pipe. What principle makes this true?
Static pressure
Friction loss
Hydraulic compression
Residual compensation
Friction loss
,What should be avoided during a water shuttle operation?
Allowing tankers to dump their water into portable tanks directly
Creating a route that causes apparatus to back up or make U-turns
Filling the water tanks too quickly
Using too many tankers at once
Creating a route that causes apparatus to back up or make U-turns
Which of these describes the properties of energy, pressure, and water flow as related to fire
suppression?
Water flow
Fire hydraulics
Pump pressure
Pressure flow.
Fire hydraulics
By what action does water work to extinguish fire?
By cooling the fuel so that combustion cannot be sustained
By separating the fuel from available oxygen
By increasing oxygen in the air so that it is too saturated for combustion to continue
, By producing steam which interrupts the chemical chain reaction required for combustion
By cooling the fuel so that combustion cannot be sustained
Which part of a fire hydrant is connected to the underground water distribution system?
Outlet
Steamer port
Barrel
Stem
Barrel
Per NFPA recommendations, how often should fire hydrants be flow tested?
Once every 5 years
Once every 3 years
Once every 2 years
Annually
Once every 5 years
Correct Answers
Per NFPA, how much water would a hydrant with a red bonnet flow?
1500 gpm or more
1000-1499 gpm
500-999 gpm
Less than 500 gpm
Less than 500 gpm
During hydrant testing, your crew takes a reading from a gauge on a charged hydrant that is not
flowing water. What type of reading is being obtained?
Static flow
Static pressure
Flow pressure
Water volume
Static pressure
,Which statement is true of dry barrel hydrants?
Whenever the hydrant is not in use, the barrel remains filled with pressurized water.
When the hydrant is fully closed, the drain is fully open.
When the hydrant is fully closed, the drain is also fully closed.
An opening at the top of the barrel allows the water to drain out after each use.
When the hydrant is fully closed, the drain is fully open.
Which part of a dry barrel hydrant is turned in order to charge the hydrant with water?
Bonnet
Barrel
Stem nut
Steamer port
Stem nut
More pressure is required to push water through a 1-inch pipe than is required to push water
through a 3-inch pipe. What principle makes this true?
Static pressure
Friction loss
Hydraulic compression
Residual compensation
Friction loss
,What should be avoided during a water shuttle operation?
Allowing tankers to dump their water into portable tanks directly
Creating a route that causes apparatus to back up or make U-turns
Filling the water tanks too quickly
Using too many tankers at once
Creating a route that causes apparatus to back up or make U-turns
Which of these describes the properties of energy, pressure, and water flow as related to fire
suppression?
Water flow
Fire hydraulics
Pump pressure
Pressure flow.
Fire hydraulics
By what action does water work to extinguish fire?
By cooling the fuel so that combustion cannot be sustained
By separating the fuel from available oxygen
By increasing oxygen in the air so that it is too saturated for combustion to continue
, By producing steam which interrupts the chemical chain reaction required for combustion
By cooling the fuel so that combustion cannot be sustained
Which part of a fire hydrant is connected to the underground water distribution system?
Outlet
Steamer port
Barrel
Stem
Barrel
Per NFPA recommendations, how often should fire hydrants be flow tested?
Once every 5 years
Once every 3 years
Once every 2 years
Annually
Once every 5 years
