Chapter 11 Flashcards
1.Lift can be described as the difference in elevation between the surface of the static water supply and the: (403)
A.nozzle.
B.fire scene itself.
C.center of the pump intake.
D.highest point on the fire apparatus.
C.center of the pump intake.
2.During the process of drafting, which results in water being forced into the hose and pump because of a partial vacuum created in the pump? (404)
A.Pressure in the intake hose and pump equals atmospheric pressure.
B.Pressure in the intake hose and pump fluctuates more than ten percent.
C.Pressure in the intake hose and pump drops to lower than atmospheric pressure.
D.Pressure in the intake hose and pump increases to higher than atmospheric pressure.
C.Pressure in the intake hose and pump drops to lower than atmospheric pressure.
3.When drafting, water is forced in and continues to rise until the pump is full of water or pressure within the pump and intake hose: (404)
A.begins to vary.
B.equals atmospheric pressure.
C.is less than atmospheric pressure.
D.is greater than atmospheric pressure.
B.equals atmospheric pressure.
4.Maximum lift at a given altitude: (404)
A.will be less than theoretical lift.
B.will be the same as theoretical lift.
C.will be greater than theoretical lift.
D.may be either greater or less than theoretical lift
A.will be less than theoretical lift.
5.Theoretical lift can be calculated by determining the actual atmospheric pressure of an area and: (404)
A.adding that number to the water’s pressure per square foot (kPa) while it is in the intake hose.
B.subtracting that number from the water’s pressure per square foot (kPa) while it is in the intake hose.
C.dividing that number by the water’s pressure per square foot (kPa) while it is in the intake hose.
D.multiplying that number by the water’s pressure per square foot (kPa) while it is in the intake hose.
D.multiplying that number by the water’s pressure per square foot (kPa) while it is in the intake hose.
6.In most circumstances, maximum lift is approximately: (404)
A.10 feet (3 m).
B.15 feet (4.5 m).
C.25 feet (7.5 m).
D.40 feet (12 m).
C.25 feet (7.5 m).
7.As the point of maximum lift is approached, the volume of water available for the fire pump: (404)
A.varies widely.
B.becomes too difficult to estimate.
C.is sufficient water for fire suppression.
D.may be too low to be of value in fire suppression.
D.may be too low to be of value in fire suppression.
8.The height that a column of water may be lifted in sufficient quantity to provide a reliable fire flow is called: (406)
A.minimum lift.
B.maximum lift.
C.theoretical lift.
D.dependable lift.
D.dependable lift.
9.After factoring in surrounding atmospheric pressure and friction loss in the intake hose, every fire pump operating properly should have a dependable lift of: (406)
A.exactly 10 feet (3 m).
B.at least 14.7 feet (4.5 m).
C.at least 21.5 feet (6.5 m).
D.between 20 (6 m) and 25 feet (7.5 m).
B.at least 14.7 feet (4.5 m).
10.When drafting, as lift or friction loss in hard intake hose is increased, water supply capability of the pump: (406)
A.increases.
Bdecreases.
C.remains the same.
D.may either increase or decrease.
Bdecreases.
11.When at draft, the sum of the pump discharge pressure and intake pressure correction that takes into account friction loss in the intake hose and height of the lift is called: (407)
A.net pump discharge pressure.
B.average pump discharge pressure.
C.practical pump discharge pressure.
D.theoretical pump discharge pressure.
A.net pump discharge pressure.
12.When should driver/operators become familiar with drafting sources within their jurisdiction? (410)
A.Preincident planning
B.During mutual aid exercises
C.Annual community awareness days
D.When scene conditions require drafting
A.Preincident planning
13.When evaluating adequacy of smaller natural sources, why should caution be used regarding their suitability as a water supply for fire fighting? (410)
A.They may have more aquatic life than larger bodies of water.
B.Nearby residents may become upset when small streams or ponds are used for fire fighting.
C.Environmental regulations often prohibit the use of small streams or ponds for drafting.
D.They may be more susceptible to fluctuations in adequacy during periods of drought than larger bodies of water.
D.They may be more susceptible to fluctuations in adequacy during periods of drought than larger bodies of water.
14.What is MOST likely to impede access to a natural static water source? (410)
A.Wildlife concerns
B.Traffic congestion
C.Recreational water activities
D.Wet/soft ground approaches
D.Wet/soft ground approaches
15.Which situation is MOST likely to make it necessary to position portable pumps at the supply source during drafting operations? (411)
A.When it is a mutual aid incident
B.When personnel are limited in number
C.When the fire is limited in scope and size
D.When fire apparatus cannot make required approach
D.When fire apparatus cannot make required approach
16.Which would be the MOST likely concern after traversing frozen ground in order to reach a drafting site? (411)
A.Ice may build up on apparatus parts.
B.Chocking wheels is not possible in icy conditions.
C.Thawing may occur from an increase in air temperature.
D.Temperatures will decrease resulting in ground becoming even more solid.
C.Thawing may occur from an increase in air temperature.
