Fire Apparatus Engineer/Operator
Chapter 7: Mathematics for the
Driver/Operator Exam Questions And
Answers
pump discharge pressure (PDP) -
correct answer ✅the total pressure needed to overcome all
friction, appliance, and elevation loss while maintaining adequate
nozzle pressure to deliver effective fire streams.
PDP formula...PDP=NP + FL
hydraulics -
correct answer ✅the study of the characteristics and movement of
water as they pertain to calculations for fire streams and fireground
operations
theoretical hydraulics -
correct answer ✅scientific or more exact calcualtions
fireground hydraulics -
correct answer ✅less exact-but certainly more user-friendly and
forgiving-calculation methods used on the fireground.
British Thermal Unit (Btu) -
correct answer ✅quantity of heat required to raise the temp of
, Fire Apparatus Engineer/Operator
Chapter 7: Mathematics for the
Driver/Operator Exam Questions And
Answers
one pound of water by 1 deg F at the pressure of 1 atmosphere and
a temp of 60 deg F.
critical rate of flow -
correct answer ✅sufficient flow must be applied to overcome the
heat generated by the fire.
nozzle pressure -
correct answer ✅the pressure required at the nozzle to deliver the
fire stream and the flow rate for which the nozzle was designed.
nozzle reaction formula smooth bore -
correct answer ✅NR=1.57x(d^2)xNP
nozzle reaction for fog -
correct answer ✅NR= .0505xgpmx(square root of NP)
flow rate -
correct answer ✅volume of water moving through the nozzle
during a specific time period
Chapter 7: Mathematics for the
Driver/Operator Exam Questions And
Answers
pump discharge pressure (PDP) -
correct answer ✅the total pressure needed to overcome all
friction, appliance, and elevation loss while maintaining adequate
nozzle pressure to deliver effective fire streams.
PDP formula...PDP=NP + FL
hydraulics -
correct answer ✅the study of the characteristics and movement of
water as they pertain to calculations for fire streams and fireground
operations
theoretical hydraulics -
correct answer ✅scientific or more exact calcualtions
fireground hydraulics -
correct answer ✅less exact-but certainly more user-friendly and
forgiving-calculation methods used on the fireground.
British Thermal Unit (Btu) -
correct answer ✅quantity of heat required to raise the temp of
, Fire Apparatus Engineer/Operator
Chapter 7: Mathematics for the
Driver/Operator Exam Questions And
Answers
one pound of water by 1 deg F at the pressure of 1 atmosphere and
a temp of 60 deg F.
critical rate of flow -
correct answer ✅sufficient flow must be applied to overcome the
heat generated by the fire.
nozzle pressure -
correct answer ✅the pressure required at the nozzle to deliver the
fire stream and the flow rate for which the nozzle was designed.
nozzle reaction formula smooth bore -
correct answer ✅NR=1.57x(d^2)xNP
nozzle reaction for fog -
correct answer ✅NR= .0505xgpmx(square root of NP)
flow rate -
correct answer ✅volume of water moving through the nozzle
during a specific time period
