Chapter 11 Flashcards
The difference in elevation between the surface of the static water supply and the center of the pump intake is called?
Lift
Theoretical scientific height that a column of water may be lifted by atmospheric pressure and a true vacuum at sea level this height is 33.9 ft the height will decrease as elevation increases is called?
Theoretical lift
Maximum height to which any amount of water may be raised through a hard suction hose to a pump determined by the ability of the pump to create a vacuum is called?
Maximum lift
Maximum lift is approximately how many feet?
25
What is the formula for determining maximum lift?
L=1.13 Hg
Height a column of water maybe lifted and sufficient quantity to provide a reliable fireflow lift may be raised through a hard suction hose to a pump taking into consideration the atmospheric pressure and the friction loss within the hard section hose. This lift is usually considered to be 14.7 ft is called?
Dependable lift
All fire department pumping apparatus are rated when drafting with a minimum lift _________feet from the center of the pump intake to the surface of water through _________ feet of hard intake hose?
10 feet
20 feet
Floating strainers may be used for water as shallow as _____feet?
One
Low level strainers may draw water as shallow as __ to ___ inches?
1 to 2
Cleaning a fire pump or piping by flowing water through it in the opposite direction of normal flow is called?
Back flushing
A tool for boring (drilling) holes in floors and other solid barriers including ice is called a?
Auger
The formula for square/rectangular pool capacity is?
C= 7.5 x L x W x D
Cistern’s, private water storage tanks, ground reservoirs, swimming pools are all examples of what type of static water supply?
Artificial