Review test questions Flashcards
When performing a capacity test the first desired pump pressure should be what psi
150
Pre-service testing of an apparatus includes which tests
Manufactures test
pump certification test
acceptance test
Performance tests are defined as what
Annual testing , Or testing following a major repair during the service life of an apparatus
manufacture testing include what 2 tests
Road test and hydrostatic test
During the road test of a manufacturers testing the apparatus must accelerate to 35 miles/ an hour in how many seconds
25
During the road test of a manufactures testing the apparatus must achieve a top speed of what
50 mph
During the road test of manufactures testing and apparatus must come to a complete stop from 20 miles/ an hour within how many feet
35
Define the hydrostatic test performed by manufactures
uses water under pressure to check integrity of pressure vessels
Pumpkin associated piping must withstand a high pressure of 500 psi for a minimum of 10 minutes
During the performance test of a fire pump the water level of a static source must be how many feet deep
4’
During a performance test of a fire apparatus the distance of the centerline of the pump intake to the surface of the water must be — for 1500 gpm capacity and—- for 2000 gpm capacity
10’ for 1500 gpm
6’ for 2000 gpm
During performance testing of fire pumps, the air temperature when the testing is conducted should be between —- and —— degrees
0-110
During performance testing a fire pumps the water temperature should be between what degrees
35-90
During the performance testing of fire pumps the barometric pressure should be at least how many inches of mercury when corrected to sea level
29”
1 inch drop in barometric pressure reduces the static lift of a pumper by approximately how many feet
1’
During testing if it is found that a hose has moved more than ??? inches from the coupling you must stop the test and replace the hose
3/8”
When more than one emergency vehicle is responding along the same route they should travel at least ??? to ??? feet apart
300-500
All gauges used for service testing must be calibrated within how many days of testing
60
During performance tests. gauges used to determine intake pressure should be calibrated to allow a range of how many inches of mercury for vacuum gauge and how many psi for compound gauge
30” mercury for vacuum gauge
150 psi for compound gauge
A pump must reach ??? inches of mercury during the vacuum test in order to stay in service
22”
Fire pumps 1250 GPM capacity must achieve a prime in how many seconds or less
30
Fire pumps with 1500 GPM capacity must be primed within how many seconds or less
45
If a pitot gauge is held too close to the nozzle it will register inaccurately higher or lower than the actual pressure
higher
To minimize a chance of intake hose kinking from a dry hydrant the driver operator should do want when connecting the Hydrant to the pumper
Put a counter clockwise twist in the house
Textbook definition of residual press
Pressure remaining in water supply system well water is flowing and is that part of the total pressure not used to overcome friction and gravity will force in Waterton fire hose pipe fittings and adapters
For every 1000 feet of altitude atmospheric pressure decreases by approximately how many pounds per square inch
.5
A flow meter must be accurate within what percentage range
+/- 5%
In an auxiliary cooling system heat is transferred from the engine cooling water to what
pump water
marine cooler is inserted into one of the hoses in the engine cooling system engine cooling must travel through it as it circulates through the system small tube surrounded by the water jacket that is connected to the discharge the fire pump and the pump is operating water may be circulating through the water jacket auxiliary cooler
The main purpose of a relief valve is to do what
Relieve excessive pressure within the pump on either discharge or intake side
what is the formula to determine lift?
L= 1.13 x Hg(inches in mercury)
When relay pumping, the smallest capacity pumper should be placed where
In the middle of the relay
The overall capacity of a relay is determined by what
Smallest diameter hose and the smallest pump
Relay pumpers equipped with adjustable intake relief valves should have them sent how many psi above the static pressure of the water system or previous pumpers discharge pressure
10 psi
Attack pumpers in a relay with adjustable intake relief valves should have them set between ??? and ??? psi
50 and 75
What is the formula for calculating flow for a tender
Tank size -10%
——————-
trip time
When using an in-line foam eductor, the pressure of the discharge side of the eductor must not exceed ??? percent of the eductors Inlet pressure
70%
what is the 2nd principle of friction loss
friction loss develops much faster than velocity
define elevation as used in the fire service
centerline of the pump or the bottom of a static water supply in relationship to ground level
water has a high surface tension which
makes it somewhat difficult to soak into dense materials
impinging stream nozzles usually provide what type of stream
wide fog pattern
which of the following determines velocity for a given volume of water
diameter of hose line
what term defines velocity increased beyond practical limits
critical velocity
the forth principle of friction loss states, that for a given velocity, friction loss is …
approximately the same regardless of the pressure on the water
Atmospheric pressure is greatest where
near sea level
What is the most likely reason wetting agents are mixed with water
It reduces the surface tension to help it penetrate deeper
Which is a guideline for positioning an apparatus at a structure during Woodland fire operations
Position on the leeward side
Which level staging occurs when the OIC designate one or more locations to draw resources from
Level two staging
Which NFPA standard prohibits firefighters from riding on the Tailboard wow vehicle is in motion
NFPA1500
Which statement is most accurate with respect to the licensing a drivers for large vehicles
States and provinces have some latitude and changing standards for drivers
Which NFPA standard outlines testing for brakes of apparatuses
NFPA1911
Why should fire pumps be tested regularly
To compare Performance to department standards
What lighting system has wattage ranging from 300 to 1000
Portable lights
Portable proportioning systems found on municipal engines have a capacity at the range in what gallonage
20 - 100
Cording to NFPA standards the water tank of a fire pump must have at least how many gallons
300
define pressure
force per unit area measured in pounds
how much does 1 cubic foot of water weigh
62.5 lbs
what consideration do engineers use when calculating water needs
domestic
industrial
firefighting
what is the 3rd principle of friction loss
friction loss varies inversely as the
fifth power of the diameter of the
hose
what is the 2nd principle of friction loss
Friction loss varies approximately
with the square of the increase in the
velocity of the flow
True or false private water
distribution systems are most often
found in residential developments
false
define force
simple measure of weight, expressed
in pounds/kgs
Influence causing changes in speed
direction shape of a substance
apparatus should maintain a clear
zone of at least how many feet from
railroad tracks to prevent contacted
objects on the railroad cars
30’
NFPA 1962
inspection, care, use of hose,
couplings, nozzles
at what distance may apparatus,
equipment, and personnel consider
protection from falling debris
200’
when can a pumpers onboard tank
be considered for use in water
supply
3rd page 137
Only after a proper size up has
confirmed location and extent of the
fire
When relay pumpers are equipped with an adjustable
intake relief valve, they should be set to 10 psi (70
kPa) above the static pressure of the water system to
which they are attached or:
10 psi above the previous pumper
What type of relay requires no adapters or other
appliances to connect intake hoses in the system?
open relay
attack pumpers equipped with
adjustable intakes should have them
set at what range
ifsta
50-75 psi
Which of the following is the formula for net pump
discharge pressure at draft?
ch. 11 - p. 409 - 9. 12
Pump discharge pressure plus intake pressure correction
Which of the following are most often used for
domestic or agricultural purposes but may be
specifically constructed and placed for fire
department use?
cisterns
Under what conditions are pumping
apparatus is rated for pump capacity & what % capacity at what range
At draft minimum 10 feet of lift from
the center of the pump to the
surface of the water through 20 feet
hard at 100% capacity
at 15’ - 70% of its capacity
at 20’ - 60% of its capacity
The rule of thumb for evaluating a
pond or small lake capacity is that for
every foot of depth for an area of 1
acre provides how many GPM for
how many hours
2nd 384
1000 gpm
5 hours
what is the equation for determining
net pump discharge pressure at draft
2nd 381
PDP + intake pressure correction
what is the equation for determining
pressure correction when drafting
Lift x total intake hose friction loss
———————————————
2.3
what is the equation for determining
maximum Lift
2nd 379
1.13 x Hq
Which of the following is a method for preventing a
pump from overheating?
Partially open tank fill or tank to pump
valve
During drafting operations, water below 35°F (1.7°C)
or above 90°F (32°C) may adversely impact the ability
of the pump to:
ch. 10 - p. 356 - 9.38
reach capacity
Which of the following is a reason water supply
systems must maintain a residual pressure of at least
20 psi (140 kPa)?
ch. 10 - p. 340 - q.10
Contamination from sources outside the main may
occur at lower pressures.
When setting up a water shuttle, which of the
following is MOST important to the success of the
shuttle operation?
number of vehicles necessary to maintain water supply
Some apparatus may be equipped with a front dump
valve; however, these designs often do not meet the
flow requirement of NFPA® 1901.
1000 gpm
Water tenders pumping water from their tanks
directly into the pump intake of an attack pumper is
called a:
direct pumping ops
low level suction strainer
flow?
depth?
2” depth
750 gpm
How much load capacity in terms of
percentage can aluminum ladder
lose if exposed to high heat
4
25%
ladders should be inspected and
cleaned how often
Monthly or after every use
The only NFPA requirement
pertaining to marking portable letters
is what
ladders shall only be marked at the
top 18 inches
NFPA 1901 recommends fire
department apparatus have a
minimum total ladder length on
aerials of how many feet
115’
What nozzle pressure should be
given to a fixed monitor smoothbore
breakaway nozzle
110 psi
120 psi for 2” at 1000 gpm
What is the flow and pressure for a
11/2” cellar nozzle
160 gpm
100 psi
What is the flow and pressure for a 2
1/2 inch seller nozzle
350 gpm
100 psi
What is the flow and pressure for a 1
1/2” distributor nozzle
95 gpm
50 psi
What is the flow and pressure for a 2
1/2” distributor nozzle
250 gpm
100 psi
1.75 x 1.75
3.06
1.85 x 1.85
3.42
2.96 x 2.96
8.76
define refractometer
measures amount of foam
concentrate in the solution. using
light velocity like x ray
what does pump discharge volume
method test
direct injection systems
what does concentrate displacement
method test
accuracy of volume of concentrate
drawn through system
what 4 methods are used to test
foam proportioning equipment
displacement method
pump discharge volume method
solution refractivity method
solution conductivity method
which test is generally conducted
first while conducted performance
evaluations
vacuum test
during testing, the flow meters used
must be + or - what percent
accuracy
5%
During testing if A mark on a hose
coupling moves more than—-
amount of inches from the coupling
testing should stop and replacement
of hose should occur
3/8”
What is the minimum diameter of
hose line to be used while
conducting pumper performance
test
2 1/2”
What minimum barometric pressure
(inches of mercury) should exist
during pumper performance testing
29” mercury
What range of water temperature
should exist when performing
pumper performance tests
35-90
What range of air temperature
should exist when performing
pumper performance test
0 - 110
NFPA 1911
standard for inspection, maintenance
& testing