Exam (elaborations)
DRIVER OPERATOR STUDY STATE QUESTIONS
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DRIVER OPERATOR STUDY STATE QUESTIONS
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DRIVER OPERATOR STUDY STATE QUESTIONS8.35 pounds - Answers -How much does 1 gallon of water weigh?
231 cubic inches - Answers -How many cubic inches does 1 gallon of water contain?
62.5 pounds - Answers -How many pounds does 1 cubic foot of water weigh?
7.481 gallons - Answers -How many gallons of water does 1 cubic foot contain?
1,728 cubic inches - Answers -How many cubic inches are there in 1 cubic foot?
.434 psi - Answers -A 1 foot high column of water exerts how much psi at it's base?
2.304 feet - Answers -How many feet will 1 psi of pressure raise a column of water?
13.55 inches - Answers -1 inch of mercury is equal to how many inches of water?
HG - Answers -What is the symbol for inches of mercury?
14.7 feet - Answers -How many feet is dependable lift?
33.87 feet - Answers -How many feet is theoretical lift?
By performing routine maintenance checks on a regular basis. - Answers -How can
most apparatus or equipment failures be prevented?
No - Answers -Is exercising the volume-series control lever part of the daily apparatus
inspection?
1 inch - Answers -Apparatus with water tanks of 1000 gallons or less must have a tank
fill line of at least how many inches?
2 inches - Answers -Apparatus with water tanks more than 1000 gallons must have a
tank fill line of how many inches?
NFPA 1901 - Answers -What NFPA is the standard for automotive fire apparatus?
NFPA 11C
NFPA 1901 - Answers -Industrial foam pumpers are built according to what NFPA
numbers?
50-75 feet - Answers -At what height do elevating water devices typically range?
, The source pumper - Answers -During relay pumping, which pumper should be the
largest capacity pumper?
The scene pumper - Answers -Relay pumping evolutions should be shut down at what
pumper first?
10 feet of lift
20 feet of hard suction - Answers -Pumper capacities are set at draft with how many
feet of lift? And through how many feet of hard suction?
150 psi - Answers -Pumpers should flow how many psi at 100% capacity?
200 psi - Answers -Pumpers should flow how many psi at 70% capacity?
250 psi - Answers -Pumpers should flow how many psi at 50% capacity?
Incoming pressure - Answers -A centrifugal pump takes advantage of what type of
pressure?
L x W x H= V (volume) - Answers -What is the Formula for finding the volume of a
square or rectangle?
Diameter squared x .7854 x H= V (volume) - Answers -What is the Formula for finding
the volume of a cylinder?
1.5 x D squared x NP= NR (nozzle reaction) - Answers -What is the Formula for finding
nozzle reaction?
1.8 x D squared x EP= INR (initial nozzle reaction) - Answers -What is the Formula for
finding initial nozzle reaction?
1/2 GPM= NR (nozzle reaction) - Answers -What is the Rule of Thumb formula for
finding nozzle reaction?
L x W / 100= sprinkler heads needed - Answers -What is the Formula for determining
the number of sprinkler heads needed?
1/2 P + 15= Q (gpm)
Multiply the answer x the number of heads x the minutes flowing to get the total flow. -
Answers -What is the Formula for finding the gpm (Q) of 1 sprinkler head?
(Q-15) x 2= P (discharge pressure) - Answers -What is the Formula for finding the
discharge pressure at each sprinkler head?
29.7 x D squared x square root of the nozzle pressure= gpm - Answers -What is the
Formula for finding the GPM for a restricted opening such as a smooth bore nozzle?
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