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Fire Apparatus Driver/Operator Questions
and Correct Answers/ Latest Update /
Already Graded
Aqueous
Ans: dissolved in water
Dry-Barrel Hydrant
Ans: Fire hydrant that has its operating valve located at the
base or foot of the hydrant rather than in the barrel of the
hydrant. When operating properly, there is no water in the
barrel of the hydrant when it is not in use. These hydrants are
used in areas where freezing may occur.
Elevation pressure
Ans: The amount of pressure created by gravity
Flow pressure
Ans: Forward pressure at a discharge opening while water is
flowing.
Hardness
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Ans: Mineral content of water, usually consisting of calcium
and magnesium.
heat of vaporization
Ans: The amount of energy required for the liquid at its boiling
point to become a gas
kinetic energy
Ans: the energy an object has due to its motion
Normal operating pressure
Ans: The observed static pressure in a water distribution
system during a period of normal demand.
Pitot gauge
Ans: A type of gauge that is used to measure the velocity
pressure of water that is being discharged from an opening. It is
used to determine the flow of water from a hydrant.
potential energy
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Ans: stored energy that results from the position or shape of
an object
Residual pressure
Ans: The pressure that exists in the distribution system,
measured at the residual hydrant at the time the flow readings
are taken at the flow hydrants.
specific heat index
Ans: The amount of heat energy required to raise the
temperature of a substance. These values are determined
experimentally and then made available in tabular f orm.
surface tension
Ans: Elastic like force at the surface of a liquid, which tends to
minimize the surface area, causing water droplets to form
Turbidity
Ans: Amount of suspended particles in water
How often should dry hydrants be flow-tested?
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Ans: Annually
Class C fire hydrant color and flow
Ans: Red; less than 500 gpm
A Class B hydrant has a flow rate of ___________ gallons per minute.
Color?
Ans: 500 to 999 gpm; orange
CLASS A HYDRANT COLOR AND GPM
Ans: Green, 1000-1499 GPM
Class AA Hydrant
Ans: 1 500 gpm (5 680 L/min) or greater. Light blue top and
noles.zz
Which way should the fire hydrant connections, especially the large
steamer connection, be facing?
Ans: Towards the street
All rights reserved © 2025/ 2026 |
Fire Apparatus Driver/Operator Questions
and Correct Answers/ Latest Update /
Already Graded
Aqueous
Ans: dissolved in water
Dry-Barrel Hydrant
Ans: Fire hydrant that has its operating valve located at the
base or foot of the hydrant rather than in the barrel of the
hydrant. When operating properly, there is no water in the
barrel of the hydrant when it is not in use. These hydrants are
used in areas where freezing may occur.
Elevation pressure
Ans: The amount of pressure created by gravity
Flow pressure
Ans: Forward pressure at a discharge opening while water is
flowing.
Hardness
All rights reserved © 2025/ 2026 |
, Page |2
Ans: Mineral content of water, usually consisting of calcium
and magnesium.
heat of vaporization
Ans: The amount of energy required for the liquid at its boiling
point to become a gas
kinetic energy
Ans: the energy an object has due to its motion
Normal operating pressure
Ans: The observed static pressure in a water distribution
system during a period of normal demand.
Pitot gauge
Ans: A type of gauge that is used to measure the velocity
pressure of water that is being discharged from an opening. It is
used to determine the flow of water from a hydrant.
potential energy
All rights reserved © 2025/ 2026 |
, Page |3
Ans: stored energy that results from the position or shape of
an object
Residual pressure
Ans: The pressure that exists in the distribution system,
measured at the residual hydrant at the time the flow readings
are taken at the flow hydrants.
specific heat index
Ans: The amount of heat energy required to raise the
temperature of a substance. These values are determined
experimentally and then made available in tabular f orm.
surface tension
Ans: Elastic like force at the surface of a liquid, which tends to
minimize the surface area, causing water droplets to form
Turbidity
Ans: Amount of suspended particles in water
How often should dry hydrants be flow-tested?
All rights reserved © 2025/ 2026 |
, Page |4
Ans: Annually
Class C fire hydrant color and flow
Ans: Red; less than 500 gpm
A Class B hydrant has a flow rate of ___________ gallons per minute.
Color?
Ans: 500 to 999 gpm; orange
CLASS A HYDRANT COLOR AND GPM
Ans: Green, 1000-1499 GPM
Class AA Hydrant
Ans: 1 500 gpm (5 680 L/min) or greater. Light blue top and
noles.zz
Which way should the fire hydrant connections, especially the large
steamer connection, be facing?
Ans: Towards the street
All rights reserved © 2025/ 2026 |
