Hydraulics And Water Supply
Questions With Accurate Answers
According to principle 1/Pascale law, in what direction(s) is (liquid) pressure
created? correct answer equally in every direction
According to the law of latent heat vaporization, what makes water an effective
extinguishing agent? correct answer the ability of water to vaporize into steam at
a low temp
At what point can lower atmospheric pressure become a concern to firefighters?
correct answer above 2000 ft, less dense atmosphere makes it harder for pumps
to get lift when drafting
Ch. 1
What characteristic of water makes it useful for firefighting? correct answer it's
incompressible in its liquid state
Ch. 11
What factors determine the flow from a solid stream nozzle? correct answer 29.7
constant
nozzle tip diameter
nozzle psi
Ch. 12
What are 2 reasons it is not advised to use the underwriters formulas to
determine friction loss? correct answer -based on outdated technology
,-the UF required different formulas, the modern formula is good for any flow
Ch. 13
What 2 factors are added together to get pump discharge pressure? correct
answer NP- nozzle pressure in psi
+
TPL- total pressure loss in psi (friction lose from hose lines, appliances, master
streams, stanpipes, FDCs and elevation losses)
Ch. 14
List the 3 options firefighters have when the attack pumper can not be directly
connected to a reliable water supply source correct answer -use water tank
-assemble a water shuttle operation
-assemble a relay pumping operation
Ch. 15
What are the 3 main reasons that building owners invest and install automatic
sprinklers? correct answer code requirements
insurance purposes
general fire protection
Ch. 2
What is the term used to describe water at rest? correct answer static
, Ch. 3
How does kinetic energy differ from potential energy? correct answer -potential is
energy at rest
-kinetic is energy in motion
Ch. 4
What 4 things are generally required for a water supply system to move water to
a hydrant? correct answer -water source
-treatment facility
-way to force water through system
-system of piping to transport water
Ch. 5
What are 2 factors that make water flow analysis testing unreliable when relying
on mathematical calculations? correct answer -sediments/minerals in pipes
reduce the diameter, reducing the flow capacity
-pipe corrosion and deterioration lead to higher friction and reduced carrying
capacity of pipe
Ch. 6
Why did nelson and royer feel that the development of the Iowa State rate-of-
flow calculcation was highly practical for fire fighting? correct answer because it
enabled firefighters to calculate the Required Fire Flow (RFF) for any structure
before fire occurred
Questions With Accurate Answers
According to principle 1/Pascale law, in what direction(s) is (liquid) pressure
created? correct answer equally in every direction
According to the law of latent heat vaporization, what makes water an effective
extinguishing agent? correct answer the ability of water to vaporize into steam at
a low temp
At what point can lower atmospheric pressure become a concern to firefighters?
correct answer above 2000 ft, less dense atmosphere makes it harder for pumps
to get lift when drafting
Ch. 1
What characteristic of water makes it useful for firefighting? correct answer it's
incompressible in its liquid state
Ch. 11
What factors determine the flow from a solid stream nozzle? correct answer 29.7
constant
nozzle tip diameter
nozzle psi
Ch. 12
What are 2 reasons it is not advised to use the underwriters formulas to
determine friction loss? correct answer -based on outdated technology
,-the UF required different formulas, the modern formula is good for any flow
Ch. 13
What 2 factors are added together to get pump discharge pressure? correct
answer NP- nozzle pressure in psi
+
TPL- total pressure loss in psi (friction lose from hose lines, appliances, master
streams, stanpipes, FDCs and elevation losses)
Ch. 14
List the 3 options firefighters have when the attack pumper can not be directly
connected to a reliable water supply source correct answer -use water tank
-assemble a water shuttle operation
-assemble a relay pumping operation
Ch. 15
What are the 3 main reasons that building owners invest and install automatic
sprinklers? correct answer code requirements
insurance purposes
general fire protection
Ch. 2
What is the term used to describe water at rest? correct answer static
, Ch. 3
How does kinetic energy differ from potential energy? correct answer -potential is
energy at rest
-kinetic is energy in motion
Ch. 4
What 4 things are generally required for a water supply system to move water to
a hydrant? correct answer -water source
-treatment facility
-way to force water through system
-system of piping to transport water
Ch. 5
What are 2 factors that make water flow analysis testing unreliable when relying
on mathematical calculations? correct answer -sediments/minerals in pipes
reduce the diameter, reducing the flow capacity
-pipe corrosion and deterioration lead to higher friction and reduced carrying
capacity of pipe
Ch. 6
Why did nelson and royer feel that the development of the Iowa State rate-of-
flow calculcation was highly practical for fire fighting? correct answer because it
enabled firefighters to calculate the Required Fire Flow (RFF) for any structure
before fire occurred
