Exam (elaborations)
Driver Operator Part II (questions 67-133) Questions and Answers
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Driver Operator Part II (questions 67-133)
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Driver Operator Part II (questions 67-133)
_____ is the desired pump pressure when supplying two lines of 2-1/2" hose, one 200
feet long and one 300 feet long, each with a 250 gpm nozzle operating at 100 psi. -
answer137.5 psi
A COMMON reason for eductor failure is: - answerimproper cleaning and maintenance
of equipment
Steering wheel ply should usually be no more than approximately ____ degrees in
either direction. - answer10
When positioning a pumper to supply a fire department connection, the driver must
consider the: - answerpositioning requirements of other apparatus
When a apparatus driver is faced with a situation requiring evasive tactics, the driver
should attempt to pass the overtaken vehicle on: - answerthe left side
You have responded to an emergency on a limited-access highway. Your apparatus is
not being used, so you should - answeruse the apparatus as a barrier between the
traffic flow and the responders on scene.
In washing a newer apparatus, you should: - answerwash with automotive shampoo
and cold water.
When performing a capacity test, the desire net pump pressure should be ___ psi. -
answer150
The part of the total pressure not used to overcome friction or gravity while forcing water
through fire hose, pipe, fittings, and adapters is known as: - answerresidual pressure.
______ is the result of over-throttling. - answeradditional fuel consumption
Because of the size of an apparatus, as well as the clearance needed when backing,
the driver/operator should: - answerassign a firefighter to clear the way and warn the
driver/operator of any obstacle obscured by blind spots.
When relay pumping, the intake relief valve should be set at: - answer10 psi above the
static pressure
, While conducting a pump capacity test, if the net pump pressure is correct but the
nozzle flow (gpm) is too high, the: - answerdischarge gate must be closed further AND
throttle setting must be reduced.
A braking system that has a snow-and-mud switch is known as a(n): - answerantilock
braking system with automatic traction control
You encounter a school bus with flashing signal lights while responding to a call. You
must stop and proceed: - answeronly after a proper signal is given by the bus driver or
police officer.
A 5" diameter hose would be expected to flow approximately the same amount as: -
answerfour 2-1/2" hoses
______ is the nozzle reaction from a 1-1/4" tip at 50 psi nozzle pressure. - answer123
lbs
A ladder pipe with a 2-inch tip at 80 psi nozzle pressure will have approximately ____
pounds of nozzle reaction. - answer500
High-energy foam systems introduce - answercompressed air into the foam solution
prior to discharge into the hoseline
In a relay pumping operation, ____ should be positioned nearest the water source -
answerthe largest capacity pumper
One gallon of water weighs ____ pounds - answer8.33
The device that controls pressure surges by changing engine speed to compensate for
changes in flow is called a: - answerpressure governor
______ primer utilizes the venturi principle. - answerexhaust primer
Level II staging may be - answerused when a large number of emergency vehicles are
responding to the same incident
During an extended period of pumping, a gradual increase in engine temperature is
noted. The first step to reduce this condition would be: - answergradually open "engine
cooler"
At a wildland fire, in order to reduce the risk to engine crews and equipment, the safest
place for an attack to begin is from a(n): - answerburned area
An example of a polar solvent is: - answeracetone
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