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Driver/ Operator Pumper Exam Questions and Answers 100% Pass
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Driver/ Operator Pumper Exam Questions and Answers 100% Pass Water - - most commonly used extinguishing agent - noncombustible - absorbs large amounts of heat Waters Boiling Point - 212° F Waters freezing point - 32°F Waters Expansion Rate - 1,700 to 1 at 500° F Law of Specific Heat - Me...

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  • December 22, 2024
  • 34
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • driver operator pumper exam questions and answers

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  • Driver operator
  • Driver operator

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KatelynWhitman

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Driver/ Operator Pumper Exam Questions and
Answers 100% Pass


Water - ✔✔- most commonly used extinguishing agent


- noncombustible


- absorbs large amounts of heat


Waters Boiling Point - ✔✔212° F


Waters freezing point - ✔✔32°F


Waters Expansion Rate - ✔✔1,700 to 1 at 500° F


Law of Specific Heat - ✔✔Measures the ability of any substance to absorb heat




Measured in BTUs (British Thermal Units)




1 BTU = the amount of heat required to raise 1lb of water 1°F


Law of Latent Heat of Vaporization - ✔✔The amount of heat needed to turn a liquid into a vapor




1 BTU to raise 1lb of water 1 degree up to 212° F


Adjustable Fog Nozzle - ✔✔Straight Stream


Narrow Fog



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Wide Fog




All 3 discharge at a rate of 100 gpm


The wider the pattern, the shorter the time span to fill a room with steam.


Advantages of Water - ✔✔1. Can absorb large amounts of heat


2. As surface area increases, heat absorption increases


3. Water is plentiful in most areas


4. Steam occupies 1,700 times its original volume as water


Disadvantages of Water - ✔✔1. High surface tension limits its penetration into dense materials


2. Incompatible with or reactive to certain fuels and combustible materials


3. Ice makes roofs and ladders slippery and can make equipment malfunction


4. Conducts electricity and makes work with energized electrical equipment dangerous


Water Pressure - ✔✔The force of water per unit area


PSI - ✔✔pounds per square inch




The elevation of water defines psi




Column of water = 1 in x 1 in x 12 in = 0.434 psi




Height determines psi


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6 Characteristics of Water - ✔✔BED PAD




Bottom


Equal


Depth




Perpendicular


All


Density


Bottom - ✔✔The pressure at the bottom is independent of the shape of the liquid container above it


Equal - ✔✔The pressure transmitted to a confirmed amount of water is transmitted equally in all

directions


Depth - ✔✔The pressure of water in an open container is proportional to its depth


Perpendicular - ✔✔The pressure on an amount of water is perpendicular to any surface it acts on


All - ✔✔At any point in the water in a container, pressure is equal in ALL directions - including upwards


Density - ✔✔The pressure of a liquid in an open container is proportional to the density of the liquid




Density = the materials weight compared to that of an equal quantity of water


6 Types of Pressure - ✔✔1. Atmospheric


2. Head


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3. Static


4. Flow


5. Residual


6. Normal operating


Atmospheric Pressure - ✔✔The pressure the atmosphere experts on earth




Sea level = 14.7 psi


Pounds Per Square Inch Gauge - ✔✔PSIG




Shows with atmospheric pressure included in the reading


Pounds Per Square Inch Absolute - ✔✔PSIA




The atmospheric pressure is included, so 14.7 should be subtracted from the overall reading to obtain the

true pressure


Head Pressure - ✔✔Based on the force created by the height of a water supply above the discharge point




To calculate = divide the head height by 2.3


Static Pressure - ✔✔available pressure at a discharge point without water flowing


Residual Pressure - ✔✔water pressure in a distribution system that is still available when a hydrant is

flowing




Created by Katelyn Whitman © 2025, All Rights Reserved. 100% PASS GUARANTEE

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