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WATER SUPPLY CH 12QUESTIONS AND ANSWERS 100% CORRECT
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Exam of 10 pages for the course Mobile Water Supply at Mobile Water Supply (WATER SUPPLY CH 12)
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WATER SUPPLY CH 12Dry barrel hydrants are designed specifically for use
a- in commercial districts
b- in freezing climated
c- with static water supplies
d- in industrial fire protection systems - answerb- in freezing climates
In a water shuttle operation, what does a vacuum mobile water supply apparatus
eliminate the need for?
a- portable tanks
b- a fill site pumper
c- hard suction hose
d- a relay pumper - answerb- a fill site pumper
Which statement about a combination water supply system is correct?
a- fire protection water supply is provided by more than one supply system
b- water pressure is provided by gravity and use of pumps
c- water is supplied by both surface and groundwater sources
d- a single water supply system provides for domestic, industrial and fire protection
needs. - answerb- water pressure is provided by gravity and the use of pumps
Minimum diameter for water lines in residential areas is
a- 9 inches
b- 7 inches
c- 8 inches
d- 6 inches - answerd- 6 inches
In order to remain in good condition, water system isolation valves should be operated
at least once every __ months
a- 12
b- 18
c- 24
d- 6 - answera- 12 months
To close a dry barrel hydrant, you should rotate the main valve until
, a- the stem will no longer turn
b- the stem will no longer turn, then counter rotate it one quarter turn
c- water flows from the drain pole
d- the unthreaded part of the operating stem is visible - answerb- the stem will no longer
turn, then counter rotate it one quarter
What is the best way to avoid water hammer?
a- open and close all valves slowly
b- equip pumpers with dump valves
c- always maintain a residual pressure of at least 20 psi
d- always use an automatic pressure regulating device - answera- open and close all
valves slowly
Which water system uses pressure provided by a water source at a higher elevation
than then distribution system?
a- gravity fed system
b- head pressure system
c- elevated source system
d- pressurized system - answera- gravity fed system
What is the recommended minimum depth of water above a hard suction hose strainer
while drafting?
a- 6 inches
b- 18 inches
c- 12 inches
d- 24 inches - answerd- 24 inches
By NFPA standard, what is the flow rate for a hydrant with a light blue bonnet?
a- 1000 to 1500 gpm
b- less than 500 gpm
c- 1500 or more gpm
d- 500 to 1000 gpm - answerc- 1500 gmp or more
Most valves in private fire protection systems are of which type?
a- gate
b- non-indicating
c- indicating
d-butterfly - answerC- indicating
All of the following are methods for unloading water from a water tender tank EXCEPT
ONE. CHOOSE THE EXCEPTION
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