Water Supply - Chapter 14
Questions with Accurate Answers
A drafting operation will require a minimum of ___ inches (mm) of water above
and below the hard intake strainer. correct answer 24 (600)
All hydrants must be opened and closed ___ to prevent damage. correct answer
slowly
Backflow Preventer correct answer A check valve that prevents water from
flowing back into a system and contaminating it.
Butterfly Valve correct answer Control valve that uses a flat circular plate in a pipe
that rotates 90 degrees across the cross section of the pipe to control the flow of
water.
Circulating Feed correct answer Fire hydrant that receives water from two or
more directions.
Circulating Hydrant correct answer Fire hydrant that is located on a secondary
feeder or distrubutor main that receives water from two directions.
Combination System correct answer Water supply system that is a combination of
both gravity and direct pumping systems. It is the most common type of
municipal water supply system.
Dead-Head Hydrant correct answer Fire hydrant located on a dead-end main that
receives water from only one direction.
, Direct Pumping System correct answer Water supply system supplied directly by a
system of pumps rather than elevated storage tanks.
Drafting correct answer Process of acquiring water from a static source and
transferring it into a pump that is above the source's level; atmospheric pressure
on the water surface forces the water into the pump where a partial vacuum was
created.
Dry hydrants are designed to supply at least: correct answer 1,000 gpm (4 000
L/min).
Dry-Barrel Hydrant correct answer 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.
During relay pumping, which apparatus should be located at the water source?
correct answer Apparatus with the greatest pumping capacity
Fire hydrant markings can be used to designate: correct answer flow capacity.
Fire hydrant tops and discharge caps should be painted as required in: correct
answer NFPA® 291.
Flowmeter correct answer Mechanical device installed in a discharge line that
senses the amount of water flowing and provides a readout in units of gallons per
minute (liters per minute).
Questions with Accurate Answers
A drafting operation will require a minimum of ___ inches (mm) of water above
and below the hard intake strainer. correct answer 24 (600)
All hydrants must be opened and closed ___ to prevent damage. correct answer
slowly
Backflow Preventer correct answer A check valve that prevents water from
flowing back into a system and contaminating it.
Butterfly Valve correct answer Control valve that uses a flat circular plate in a pipe
that rotates 90 degrees across the cross section of the pipe to control the flow of
water.
Circulating Feed correct answer Fire hydrant that receives water from two or
more directions.
Circulating Hydrant correct answer Fire hydrant that is located on a secondary
feeder or distrubutor main that receives water from two directions.
Combination System correct answer Water supply system that is a combination of
both gravity and direct pumping systems. It is the most common type of
municipal water supply system.
Dead-Head Hydrant correct answer Fire hydrant located on a dead-end main that
receives water from only one direction.
, Direct Pumping System correct answer Water supply system supplied directly by a
system of pumps rather than elevated storage tanks.
Drafting correct answer Process of acquiring water from a static source and
transferring it into a pump that is above the source's level; atmospheric pressure
on the water surface forces the water into the pump where a partial vacuum was
created.
Dry hydrants are designed to supply at least: correct answer 1,000 gpm (4 000
L/min).
Dry-Barrel Hydrant correct answer 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.
During relay pumping, which apparatus should be located at the water source?
correct answer Apparatus with the greatest pumping capacity
Fire hydrant markings can be used to designate: correct answer flow capacity.
Fire hydrant tops and discharge caps should be painted as required in: correct
answer NFPA® 291.
Flowmeter correct answer Mechanical device installed in a discharge line that
senses the amount of water flowing and provides a readout in units of gallons per
minute (liters per minute).
