Chapter 12, Water Supply
Questions With Accurate Answers
4 components of water systems correct answer source of water supply, means of
moving water, water treatment facility, water storage and distribution systems
A ________ valve visually shows the position of the gate or valve seat - open,
closed, or partially closed. correct answer indicating
Business/industrial mains are ___ inches? correct answer 8 inch
Butterfly Valve correct answer Type of control valve that uses a flat circular plate
in the pipe which rotates ninety degrees across the cross section of the pipe to
control flow.
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.
Direct Pumping System correct answer Water supply system supplied directly by a
system of pumps rather than elevated storage tanks.
Distributors correct answer Grid arrangements of smaller mains serving individual
fire hydrants and blocks of consumers.
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-Barrel Hydrant correct answer Fire hydrant that has its operating valve at the
water main 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 could occur.
Factors that affect hydrant location... correct answer Types of construction, types
of occupancies, building densities, the size of water mains, and required fire flows
for occupancies.
Flow of GREEN hydrants? correct answer Class A, 1,000 - 1,499 gpm.
Flow of RED hydrants? correct answer Class C, less than 500 gpm.
Flow Pressure correct answer Pressure created by the rate of flow or velocity of
water coming from a discharge opening.
Gate Valve correct answer Control valve with a solid plate operated by a handle
and screw mechanism. Rotating the handle moves the plate into or out of the
waterway.
Gravity System correct answer Water supply system that relies entirely on the
force of gravity to create pressure and cause water to flow through the system.
The water supply, which is often an elevated tank, is at a higher level than the
system.
Questions With Accurate Answers
4 components of water systems correct answer source of water supply, means of
moving water, water treatment facility, water storage and distribution systems
A ________ valve visually shows the position of the gate or valve seat - open,
closed, or partially closed. correct answer indicating
Business/industrial mains are ___ inches? correct answer 8 inch
Butterfly Valve correct answer Type of control valve that uses a flat circular plate
in the pipe which rotates ninety degrees across the cross section of the pipe to
control flow.
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.
Direct Pumping System correct answer Water supply system supplied directly by a
system of pumps rather than elevated storage tanks.
Distributors correct answer Grid arrangements of smaller mains serving individual
fire hydrants and blocks of consumers.
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-Barrel Hydrant correct answer Fire hydrant that has its operating valve at the
water main 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 could occur.
Factors that affect hydrant location... correct answer Types of construction, types
of occupancies, building densities, the size of water mains, and required fire flows
for occupancies.
Flow of GREEN hydrants? correct answer Class A, 1,000 - 1,499 gpm.
Flow of RED hydrants? correct answer Class C, less than 500 gpm.
Flow Pressure correct answer Pressure created by the rate of flow or velocity of
water coming from a discharge opening.
Gate Valve correct answer Control valve with a solid plate operated by a handle
and screw mechanism. Rotating the handle moves the plate into or out of the
waterway.
Gravity System correct answer Water supply system that relies entirely on the
force of gravity to create pressure and cause water to flow through the system.
The water supply, which is often an elevated tank, is at a higher level than the
system.
