What does one cubic foot of water weigh? - ANSWER -62.5 lbs
What does One cubic foot of water contain in inches? - ANSWER -
1.728 cubic inches
What does One cubic foot of water contain in gallons? - ANSWER -7.5
gallons
What does One gallon of water weigh? - ANSWER -8.35 lbs
What does One gallon of water contain in inches? - ANSWER -231
cubic inches
How high will One psi elevate water? - ANSWER -2.304 feet
What is atmospheric pressure at sea level? - ANSWER -14.7 psi
What is the maximum lift for drafting? (Theoretically) - ANSWER -34
feet
How high does One inch (1") mercury (inches in vacuum) lift? -
ANSWER -1.13 feet of lift
,What is the recommended minimum psi that should be maintained on
the compound gauge when taking water from a hydrant? - ANSWER
10 psi
What is Static pressure? - ANSWER -Stored or potential energy that is
available to force water through pipes and fittings, fire hose, and
adapters.
What are all the steps in Certification Test (pre-service tests)? -
ANSWER -1. 2 Hour: 100% @ 150 psi
2. 1/2 hour: 70% @ 200 psi
3. 1/2 hour: 50% @ 250 psi
4. 10 minutes: 100% @ 165 psi (overload or spurt test)
What is a Spurt or Overload test? - ANSWER -100% @ 165 psi (done in
certification test for 10 minutes)
What are all the steps in a Service Test? - ANSWER -1. 20 minutes:
100% @ 150 psi
2. 10 minutes: 70 % @ 200 psi
3. 10 minutes: 50% @ 250 psi
Optional: 100% @ 165 psi (overload or spurt test)
What are Pump Tests? - ANSWER -100% capacity @ 150 psi net pump
pressure
70% capacity @ 200 psi net pump pressure
50% capacity @ 250 psi net pump pressure
, What is Net Engine/Pump Pressure (NEP)? - ANSWER -Net Pump
Pressure (NEP) is the measurement of the total work performed by the
pump:
a. To lift water into the pump (drafting)
b. To discharge water from the pump
NEP= Suction Side Work(drafting) + Discharge Side Work
How do you figure out Suction Side Work ? - ANSWER -Suction Side
Work(psi)= Lift (ft)+Intake Hose FL(Friction Loss) (psi) Divided by 2.3
What is Fog nozzle pressure for Hand held nozzle and Master Stream?
- ANSWER -100 psi
What is Smooth Bore nozzle pressures for Hand held nozzle and
Master Stream? - ANSWER -Hand Held : 50 psi
Master Stream: 80 psi
What is Newton's Third Law of motion pertaining to Nozzle Reaction?
- ANSWER -"For every action there is an equal and opposite reaction"
What are the two variables that affect the reach of fire streams? -
ANSWER -1. Air Resistance
2. Gravity
What angle does a stream get the greatest horizontal reach? -
ANSWER -30-34 degrees
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