Chap 5 Quiz Flashcards
Which statement about the characteristics of water is MOST accurate?
Water is considered to be virtually incompressible and its weight varies at different temperatures.
Which statement about the ability of water to extinguish fire is MOST accurate?
Water can cool or absorb heat from a fire as well as smother fires.
Because a large amount of heat is required to change water to steam:
this allows more heat to be absorbed from the fire.
At 212°F (100°C), water converted to steam occupies approximately:
1,700 times its original volume.
Which principle of pressure is illustrated when two containers hold two different liquids of different depths, but the pressure at the bottom of each container is approximately the same?
The pressure of a liquid in an open vessel is proportional to the density of the liquid.
Atmospheric pressure at sea level is considered to be:
14.7 psi (100 kPa).
The forward velocity pressure while water is flowing from a discharge opening is considered
flow pressure.
Which principle of friction loss demonstrates the advantage of a larger size hose?
For the same discharge, friction loss varies inversely as the fifth power of diameter of hose.
Which action would reduce friction loss caused by hose length or diameter?
Increasing the diameter of the hose
Which means of moving water uses a primary water source located at a higher elevation than the distribution system ?
Gravity system
Which term refers to a fire hydrant that receives water from two or more directions?
Circulating feed or looped line
Water main valves should be located
at frequent intervals in a grid system.
What are the two broad categories of valves for water systems?
Indirect and non-indirect
What are two purposes of private water supply systems?
To provide water to citizens living off the system and to make sure that during emergencies that the water that is being used by the citizens is not effecting the water being used for emergencies.
Why must protected properties maintain two completely separate systems when potable and nonpotable water systems are both used?
To make sure that water remains easily in use for emergencies.
