WATER DISTRIBUTION GRADED 1 EXAM 2025: 120+
QUESTIONS AND ANSWERS|GRADED A+ | GUARANTEED
PASS!!
It is best to use __________ to determine the hydraulic grade line.
- answer-Pressure gauges
What are the 3 most common types of centrifugal pump impellers?
- answer-Closed, semi-open, open
What is the purpose of a check valve?
- answer-To control the direction of flow
Where would be the best place for hydrants to be located?
A - Close to buildings
B - Near the street
C - Near street intersections
D - Behind protective barriers
- answer-C - Near street intersections
What type of mechanical pipe cleaning unit has high-carbon spring-steel blades?
- answer-Metal scrappers
What could the loss of pressure in a water system possibly cause, besides
compromising fire fighting capabilities?
- answer-Contamination due to backflow/backsiphonage
______________ valves are most often used where pressure is relatively high and
positive shutoff is required, such as the discharge of a high-lift pump.
- answer-Large plug
It is best to have an _________________ to prevent the collapse of a pipe when it
is being emptied.
- answer-Air-and-vacuum relief valve
,What is a cross-connection?
- answer-Temporary or permanent physical connection between potable water and
unapproved sources
What does high water pressure cause?
A - More main and service leaks
B - More hot water tank failures
C - More appliance failures
D - All of the above
- answer-D - All of the above
An advantage of _________________ is that there is no flow of water from a
broken hyrdant.
- answer-Dry barrel hydrants
What type of pipe has high tensile strength, is low cost, and is good hydraulically
when lined but is subject to general corrosion if installed unprotected in a corrosive
environment?
- answer-Steel pipe
What type of meter should have a strainer installed ahead of the flow into it to
protect it from sediment and other objects in the water?
- answer-Compound meter
What should be inspected on a altitude valve that fills an elevated tank?
A - Opening and closing speed to prevent water hammer
B - Make sure no oil leaks that could contaminate the water
C - Make sure valve is letting enough water in to fill the tank
D - Both A and C
- answer-D - Both A and C
What type of large water storage is usually equipped with an adjacent pumping
system that can be used in an emergency to pump water to the distribution system?
- answer-Standpipes
What type of valve is used in the distribution system where the main is not buried
very deep?
- answer-Horizontal gate valve
, Water utilities that purchase their water during off-peak hours will usually pay
much less. The rate charge for this water is often called ______________.
- answer-Off-peak charge
What can help a water utility avoid using large pumps?
- answer-Elevated storage tanks
Large pumps should be started with the discharge valve _____________. If a foot
valve does not exist and no head is on the suction side of the pump, it should be
primed using a ____________.
- answer-Closed and Vacuum pump/ejector operated with steam, air or water
If large capacity and close accuracy at low flows are important, what type of meter
is best?
- answer-Compound-type meter
The lowest minimum pressure in distributions systems of _______________ is a
standard in many states and water system guidelines.
- answer-20 psi
Which form of chlorine is most effective in killing bacteria?
A - Sodium hypochlorite
B - Combined available chlorine
C - Total chlorine
D - Free available chlorine
- answer-D - Free available chlorine
What type of water meter is usually found on a fire line to measure both high and
low flows?
- answer-Detector-check meter
The first type of cleaning pig to be sent through a main is called ___________.
- answer-Bare pigs
When using a trench box, trench width should be ______________ greater than the
outside diameter of the pipe.
- answer-1-2 feet
QUESTIONS AND ANSWERS|GRADED A+ | GUARANTEED
PASS!!
It is best to use __________ to determine the hydraulic grade line.
- answer-Pressure gauges
What are the 3 most common types of centrifugal pump impellers?
- answer-Closed, semi-open, open
What is the purpose of a check valve?
- answer-To control the direction of flow
Where would be the best place for hydrants to be located?
A - Close to buildings
B - Near the street
C - Near street intersections
D - Behind protective barriers
- answer-C - Near street intersections
What type of mechanical pipe cleaning unit has high-carbon spring-steel blades?
- answer-Metal scrappers
What could the loss of pressure in a water system possibly cause, besides
compromising fire fighting capabilities?
- answer-Contamination due to backflow/backsiphonage
______________ valves are most often used where pressure is relatively high and
positive shutoff is required, such as the discharge of a high-lift pump.
- answer-Large plug
It is best to have an _________________ to prevent the collapse of a pipe when it
is being emptied.
- answer-Air-and-vacuum relief valve
,What is a cross-connection?
- answer-Temporary or permanent physical connection between potable water and
unapproved sources
What does high water pressure cause?
A - More main and service leaks
B - More hot water tank failures
C - More appliance failures
D - All of the above
- answer-D - All of the above
An advantage of _________________ is that there is no flow of water from a
broken hyrdant.
- answer-Dry barrel hydrants
What type of pipe has high tensile strength, is low cost, and is good hydraulically
when lined but is subject to general corrosion if installed unprotected in a corrosive
environment?
- answer-Steel pipe
What type of meter should have a strainer installed ahead of the flow into it to
protect it from sediment and other objects in the water?
- answer-Compound meter
What should be inspected on a altitude valve that fills an elevated tank?
A - Opening and closing speed to prevent water hammer
B - Make sure no oil leaks that could contaminate the water
C - Make sure valve is letting enough water in to fill the tank
D - Both A and C
- answer-D - Both A and C
What type of large water storage is usually equipped with an adjacent pumping
system that can be used in an emergency to pump water to the distribution system?
- answer-Standpipes
What type of valve is used in the distribution system where the main is not buried
very deep?
- answer-Horizontal gate valve
, Water utilities that purchase their water during off-peak hours will usually pay
much less. The rate charge for this water is often called ______________.
- answer-Off-peak charge
What can help a water utility avoid using large pumps?
- answer-Elevated storage tanks
Large pumps should be started with the discharge valve _____________. If a foot
valve does not exist and no head is on the suction side of the pump, it should be
primed using a ____________.
- answer-Closed and Vacuum pump/ejector operated with steam, air or water
If large capacity and close accuracy at low flows are important, what type of meter
is best?
- answer-Compound-type meter
The lowest minimum pressure in distributions systems of _______________ is a
standard in many states and water system guidelines.
- answer-20 psi
Which form of chlorine is most effective in killing bacteria?
A - Sodium hypochlorite
B - Combined available chlorine
C - Total chlorine
D - Free available chlorine
- answer-D - Free available chlorine
What type of water meter is usually found on a fire line to measure both high and
low flows?
- answer-Detector-check meter
The first type of cleaning pig to be sent through a main is called ___________.
- answer-Bare pigs
When using a trench box, trench width should be ______________ greater than the
outside diameter of the pipe.
- answer-1-2 feet
