MWS Test Questions Flashcards
1
Q
Identify 2 correct statements about conducting a daily inspection of an MWS apparatus equipped with a fire pump.
A
1) Confirm that the foam tank level is full.
2) Operate the pump drive control.
2
Q
During the Vacuum service test, the system vacuum and pump priming device should achieve a column of mercury of at least:
A
22 inches
3
Q
Most jurisdictions prefer to draft from a static water source during service testing because it:
A
Is a true test of the pumps ability.
4
Q
Identify TWO items that should be included on daily MWS records:
A
Tire condition and coolant levels.
5
Q
Traveling at high speeds on a curvy road may cause an MWS apparatus to:
A
Leave the road surface and roll over.
6
Q
Before driving over a guarded railroad crossing during an emergency response:
A
Look both right and left and proceed cautiously.
7
Q
Identify the TRUE statement about an MWS with an automatic transmission.
A
The automatic transmission on an MWS apparatus gives you the option of selecting a gear.
8
Q
Identify two correct statements about looping mains in a distribution grid.
A
1) They ensure that water flows.
2) They create a constant flow and less sediment forms in the pipes.
9
Q
Since saltwater or water containing certain chemicals can corrode the apparatus pump, you should:
A
Flush the pump with fresh water after using it.
10
Q
If water is flowing through 200 feet of 5” hose at 300 GPM, then the theoretical friction loss is approximately:
A
1.44 psi
11
Q
Which equation is used to determine the elevation pressure loss for re supplying a pumper located approximately 20 feet above the location of the MWS?
A
EP = 0.5 x 20
12
Q
What is Head Pressure?
A
Pressure caused by the height of a water supply above the discharge point.
13
Q
What is Static Pressure?
A
Available pressure at a discharge point without water flowing.
14
Q
What is Flow Pressure?
A
The forward velocity of water at the discharge point.
15
Q
What is Residual Pressure?
A
Water pressure in a distribution system that is still available when a hydrant is flowing.
16
Q
What is Normal Operating Pressure?
A
Water pressure in a distribution system during regular consumption.
17
Q
The hand method can be used for estimating the friction loss in a hose line with a diameter of:
A
2 1/2”
18
Q
Hard suction hoses are noted for their:
A
Resistance to collapsing.
19
Q
One characteristic of discharge pressure relief valves is they:
A
Are slow to close after being opened.
20
Q
3 true statements about positive displacement pumps:
A
1) There is a piston type and a rotary gear type.
2) Some piston positive displacement pumps can pump water on the forward stroke and on the return stroke.
3) Many positive displacement pumps have been replaced by the centrifugal pump.
21
Q
When a dry supply line is being charged, it is important to open the:
A
Bleeder valve.
22
Q
These are the steps for a stationary operation with a PTO - driven fire pump in the correct order:
A
1) Position the MWS apparatus.
2) Place the transmission in Neutral.
3) Set the Parking Brake.
4) Operate the PTO control.
5) Chock the wheels.
23
Q
What is Head Pressure?
A
Pressure caused by the height of a water supply above the discharge point.
24
Q
What is Static Pressure?
A
Available pressure at a discharge point w/o water flowing.
25
What is Flow Pressure?
The forward velocity of water at the discharge point.
26
What is Residual Pressure?
Water pressure in a distribution system that is still available when a hydrant is flowing.
27
What is Normal Operating Pressure?
Water pressure in a distribution system during regular consumption.
28
Steep Grades:
Brake fade can result in the driver/operator being unable to slow or stop the apparatus.
29
Narrow Roads:
Difficulty passing other vehicles and the possibility of getting the apparatus tires off the road surface.
30
Blind curves and intersections:
Driver/operator cannot see oncoming cross traffic and drivers of non-emergency vehicles cannot see oncoming apparatus.
31
Inclement weather conditions:
Roads may not be clear; there may be debris that should be avoided.
32
Winding Roads:
Require a lot of concentration on the part of the driver/operator; one slight slip can result in a collision.
33
Long driveways:
When two apparatus approach from opposite directions, one may be forced to back out.
34
The best fill and dump sites are those in which:
The MWS apparatus driver/operator can drive straight in from one direction, fill or dump, and then proceed straight out the other end at both sides.
35
Fill site pumpers should have a minimum pump capacity of:
1,000 GPM.
36
At a fill site, a cone or similar device is used to:
mark the stopping point for an MWS apparatus.
37
As operations proceed during water shuttles, make and break personnel at the fill site should monitor:
ground conditions.
38
The most efficient water shuttle dump site locations contain the water using:
portable water tanks.
39
When it becomes necessary for the dump site pumper to operate off its tank because the portable tanks are empty then:
The attack pumper should be notified that water loss is imminent.
40
During the set-up of multiple portable water tanks at a water shuttle operation, the second portable tank is filled:
after the first tank is full and in use.
41
To determine the total flow rate using the actual testing method:
divide the amount of water dumped by the trip time.
42
At a water shuttle operation, the amount of water dumped is the amount of water the tank holds less:
10%
43
During the vacuum service test, the system vacuum and pump priming device should achieve a column of mercury of at least:
22 inches.
44
The purpose of a priming device test is to:
evaluate how quickly the priming device can create a vacuum to bring water through a pump to the discharge hose.
45
3 conditions a MWS should be driven in low gear:
1) approaching an intersection
2) climbing a hill
3) traveling around a corner
46
Identify the 4 steps for completing a left turn with an MWS apparatus on a 4-lane highway:
1) check for oncoming traffic.
2) safely make the left turn.
3) activate the left turn signal.
4) check to see if the side street road is clear.
47
Identify 3 important reasons for knowing the dimensions of the MWS apparatus your driving:
1) so you know whether it can travel under a specific overpass.
2) so you don't hit any obstructions or obstacles.
3) so you are sure it will fit in a designated parking area.
48
When performing the serpentine exercise, you:
should only travel in one direction, w/o striking the obstruction.
49
Traditional Strainer must have at least ____ above this type of strainer or the water above the strainer will whirlpool.
24"
50
Floating Strainer -
May get around the 24" minimum depth with this type of strainer, but the filter can only draw water from the bottom.
51
Low Level Strainer -
can rest on the bottom of a pool or tank with a minimum of 2" of water above to prevent whirl pooling.
52
Which equation is used to determine the elevation pressure loss for resupplying a pumper located approximately 20' above the location of the MWS?
EP = 0.5 x 20
53
The condensed Q formula for a 3" hoseline is:
FL = Q2
54
Identify THREE TRUE statements about positive displacement pumps:
1) Many positive displacement pumps have been replaced by the centrifugal pump.
2) Some piston positive displacement pumps can pump water on the forward stroke and on the return stroke.
3) There is a piston type and a rotary gear type.
55
One of the drawbacks of a piston positive displacement pump is the:
fire stream tends to pulsate.
56
A priming device works by:
creating a partial vacuum.
57
If using a multi-stage pump for pumping from an internal tank or hydrant:
The SERIES/PRESSURE position gives you maximum pressure for a short period.
58
Fill site pumpers should have a minimum pump capacity of:
1,000 GPM.
59
The fill site for a water shuttle operation maybe shut down when:
All MWS apparatuses have been refilled.
60
At a water shuttle operation, the second and subsequent mobile water supply apparatuses may leave the dump site once:
their entire load has been dumped.
61
To determine the handling time in a flow rate calculation, add the fill site time and the dump site time, including the time spent:
To position the MWS apparatus at the fill and dump sites, to make and break, and to fill and dump.
62
Remember!
filling time, travel time, and dumping time. Total flow rate in gpm to evaluate the efficiency of an MWS apparatus.
63
Allowing an MWS apparatus engine to idle over an extended period of time can lead to all of the following EXCEPT:
Engine Fatigue
64
3 steps for changing to the left lane on a limited access highway:
1) activate the turn signal.
2) move the apparatus safely to the left lane.
3) check the side and rear view mirrors.
65
All of the following statements about driving an MWS apparatus through areas of restricted horizontal and vertical clearances are true EXCEPT:
a) make sure you can see your spotter.
b) judge your MWS apparatus' clearance around obstructions.
c) use your side view mirrors.
D) USE THE APPROPRIATE TURN SIGNAL.
66
Identify two correct statements about looping mains in a distribution grid.
They ensure that water flows from two directions into hydrants.
They create a constant flow and less sediment forms in the pipes.
67
The best definition of water pressure is the:
force of water per unit area.
68
Hard suction hoses are noted for their:
resistance to collapsing.
69
To correct for lateral thrust wear on parts in centrifugal pumps, the pump:
has water enter the impeller in both directions.
70
When a centrifugal pump operates:
as flow increases, discharge pressure decreases; as impeller speed increases, discharge pressure increases.
71
Four true statements about "gravity dump systems."
1) Gravity dumps rely on natures gravitational pull to empty water from the tank.
2) Manually opened valves on gravity dumps may require someone to climb to the top of the MWS apparatus tank.
3) Gravity dumps usually employ 8" or larger round or square piping with a valve that extends to the exterior of the apparatus.
4) The valve on the gravity dump may be designed to open manually or remotely.
72
When a fire scene is located down a narrow lane, it is best to locate the dump site:
at the intersection where the lane meets a thoroughfare.
73
When operating a water supply operation involving a fill site pumper with two 2 1/2" fill lines, what is the recommended total number of make and break personnel that should be involved?
2
74
The type of dump site operation in which MWS apparatus dump water into independent tanks and the dump site pumper drafts water from the tanks and supplies the attack apparatus is referred as a:
Portable water tank operation.
75
To determine the handling time in a flow rate calculation, add the fill site time and the dump site time, including the time spent:
to position the MWS apparatus at the fill and dump sites, to make and break, and to fill and dump.
76
Identify 3 factors that are analyzed to determine total flow rate in GPM to evaluate the efficiency of an MWS apparatus.
1) Travel Time
2) Filling Time
3) Dumping Time
77
Ensure auxiliary tank is full is considered a
Daily inspection.
78
Operate pump primer is considered a
Daily inspection.
79
Clean intake strainers is considered a
Weekly inspection.
80
Inspect auxiliary winterization system is considered a
Daily inspection
81
When checking the left front or right front side of the fire apparatus, don't forget to inspect the:
saddle tanks
82
Pre-service pump certification tests are conducted by:
an independent testing agency.
83
When using a static body of water as your water source during fire apparatus service testing the water must not be more than
10 feet above the centerline of the pump intake and the water must be at least 4 feet deep.
84
If the engine speed check proves the MWS apparatus is running at a different speed than that which it was originally rated, you need to:
stop the testing until the problem is corrected.
85
Steps for conducting a pumping test in the correct order.
1) Gradually speed up the pump until the net pump discharge pressure is 150 psi.
2) Use a pitot tube or a flowmeter to check the flow of water at the nozzle.
3) Record six different readings at 5-minute intervals for a total of 20 minutes.
4) Set the net pump discharge pressure to 200 psi.
5) Set the net pump discharge pressure to 250 psi.
86
The 3 parts of the "pressure control test" require you to close the flowing valves one at a time:
in no less than 3 seconds and no more than 10 seconds.
87
The gauge and flowmeter test compares flowmeter readings with actual pitot tube readings. The two readings should differ by no more than:
10%
88
Match the equipment needed for conducting fire pump service tests with its correct function:
Rope or test stand - secures test nozzles.
Pitot tube - measures the velocity pressure of a stream of a stream of water.
Tachometer - checks engine speed.
Solid stream nozzles - needed to match the volumes pumped for different tests.
Compound gauge - checks the pump intake pressure.
Flowmeter - reads the flow of water directly in gpm.
89
Match each type of fire apparatus record to the element or activity being inspected.
Fuel level - daily record
Pump primer - weekly record
Safety inspections - periodic record
Oil filter changes - fuel, oil, and mileage records
90
An MWS apparatus may have steering system problems if the steering wheel can be rotated (w/o moving the front tires) more than:
10 degrees
91
During MWS apparatus service testing, the atmospheric air temperature should be between:
0 degrees F and 100 degrees F
92
The pressure control service test measures pressure devices at 3 different points. They are:
90 psi, 150 psi, and 250 psi
93
When testing the priming device on an MWS apparatus with a fire pump with a capacity less than 1500 GPM, the priming device should be able to create the necessary vacuum in 30 seconds to lift water 10 feet through:
20 feet of hard suction hose.
94
When performing a vacuum service test, once the engine is turned off, the column of mercury should fall no more than:
10 inches in 5 minutes.
95
The formula for travel time in a flow rate calculation includes a built in factor for acceleration and deceleration times as the MWS apparatus leaves and approaches the fill and dump sites. The formula also assumes an average travel speed between the fill and dump site of:
35 MPH
96
The key thing to remember when conducting an inspection of an MWS apparatus is to be:
Systematic
97
Place the steps for part two of the pressure control test in the correct order:
1) set the fire pump so that it is discharging at a net pump discharge pressure of 150 psi.
2) reduce the pumping engine throttle until the net pump discharge pressure drops to 90 psi.
3) set the pressure control device to maintain the discharge pressure at 90 psi.
4) close the flowing valves one at a time.
5) the pump discharge pressure should rise no more than 30 psi when all valves are closed.
98
What kind of record is this?
Safety Inspection:
Periodic
99
What kind of record is this?
Pump valves:
Daily inspection record.
100
What kind of record is this?
Oil filter changes
Fuel, oil, and mileage record.
101
What kind of record is this?
Pump and intake strainers
Weekly inspection record.
102
Identify three things you should do when turning an MWS apparatus 180 degrees:
1) be aware of any obstructions in your line of travel.
2) make sure you can see your spotter.
3) use the side view mirrors equipped on the MWS apparatus.
103
When performing the serpentine exercise, you:
Should only travel in one direction, without striking the obstruction.
104
Match each strainer to its description:
Low level strainer:
Can rest on the bottom of a pool or tank with a minimum of 2 inches of water above to prevent whirlpooling.
105
Floating strainer:
May get around the 24" minimum depth with this type of strainer but the filter can only draw water from the bottom.
106
Traditional strainer:
Must have at least 24 inches of water above this type of strainer or the water above the strainer will whirlpool.
107
If the total pressure loss (TPL) is 15 psi, what is the required pump discharge pressure for resupplying an ARFF vehicle?
35 psi
108
To determine the pump discharge pressure when resupplying an attack apparatus, you must add the TPL loss to the:
Required intake pressure of the apparatus being resupplied.
109
The condensed "Q" formula for a 3" hoseline is:
FL=Q2
110
According to NFPA 1901, a discharge pressure relief valve must operate within:
10 seconds after discharge pressure rises 30 psi above sea level.
111
When controlling pump valves, push-pull handles:
Can accurately control line pressure and be locked into place.
112
Fill site pumpers should have a minimum capacity of:
1,000 gpm
113
The advantage of using an MWS apparatus with a jet assisted dump is that:
The in-line discharge creates a Venturi effect increasing the water flow through the large tank discharge.
114
The basic goal of a multiple portable water tank operation is to keep:
the tank being drafted from full at all times
115
Identify FIVE requirements for an MWS apparatus that can be found in NFPA 1901.
THIS WAS NOT A TEST QUESTION! This appeared on one of the challenge review quizzes. Some of these items from NFPA 1901 do occasionally reappear throughout the course.
1) An MWS apparatus equipped with a fire pump must have a tank-to-pump line at least two inches in diameter and be capable of supplying the pump with 500 gpm until at least 80% of the water in the tank is emptied.
2) An MWS apparatus must be equipped with at least one external fill connection connected into the tank to be filled at a minimum rate of 1,000 gpm.
3) The external fill connection should be equipped with a valve, strainer, and a 30 degree elbow.
4) Valves that are 3 inches or larger must be of the slow-closing design.
5) An MWS apparatus must have at least 3 large tank discharges capable of discharging 90% of the tank volume at an average rate of 1,000 gpm.
116
The tank-to-pump flow rate test measures whether the piping between an apparatus' water tank and fire pump meets the minimum flow standards of:
NFPA 1901
117
Identify the TWO most important reasons for maintaining good MWS apparatus records.
1) Keeps everyone on the team informed about equipment conditions.
2) Helps determine whether equipment should be repaired/replaced.
118
When performing a vacuum service test, once the engine is turned off, the column of mercury should fall no more than:
10 inches in 5 minutes.
119
Identify FOUR pre-service tests for an MWS apparatuses equipped with a fire pump:
1) road tests
2) independent pump certification tests
3) hydrostatic tests
4) purchase acceptance tests
120
Identify THREE critical items that should be included on an MWS apparatus daily inspection checklist.
1) apparatus unit identification number
2) inspected by column
3) remarks column
121
Identify TWO examples of abiding by state, local, and departmental driving regulations and ordinances.
1) having the appropriate classification driver's license.
| 2) stopping at an intersection in a neighborhood with a STOP sign.
122
Identify THREE situations where you should be aware of your MWS apparatus' dimensions to avoid a possible hazard.
1) traveling under an overpass
2) backing into a mutual aid fire department stall
3) maneuvering around parked cars
123
Place the steps for starting an MWS in the correct order.
1) Disconnect all auxiliary electrical and air sources.
2) Turn on the apparatus' battery (ies).
3) Start the engine.
4) Observe the apparatus' gauges.
5) Check seat, mirrors, and steering wheel adjustments.
6) Check that all crew members have fastened their seat-belts.
124
Hard Suction Hose
Not designed for positive pressure.
125
Hard Suction Hose
Non-collapsible
126
Medium Diameter Hose
Gives flexibility for positioning the pumper at the hydrant.
127
Large Diameter Hose
Low friction loss.
128
Large diameter hose
Once charged, are virtually impossible to move.
129
Pump Basics!
Piston:
Multi-cylinder version used for high-pressure fog nozzles.
130
Pump Basics!
Rotary Gear:
Uses two meshed gears.
131
Pump Basics!
Rotary Vane:
Has self adjusting part that lowers maintenance.
132
Pump Basics!
Centrifugal:
Is not self priming.
Clearance between impeller hub and housing can be a problem.
133
Identify TWO correct statements about hydrants.
Grid systems with large supply mains and looping secondary mains generally have less friction losses and deterioration.
If hydrants are color coded select a light blue hydrant when responding to a large incident and be sure to test the flow before connecting the hydrant to the fire pump.
134
What is the minimum required intake pressure of the apparatus being resupplied.
20 psi.
135
An MWS apparatus is resupplying 1,000 GPM to a pumper using 50 feet of 5" hose. The pumper is in a gully 4 feet below the location of the MWS. Which of the following shows the correct equations for determining the necessary pump discharge pressure.
```
FL = 0.08 x (10)2 x 0.5 = 4 psi
EP = 0.5 x 4 = 2 psi
TPL = 4 - 2 + 0 = 2 psi
PDP = 10 + 2 = 12 psi
```
136
A hose has a flow rate of 500 GPM with a friction loss of 4 psi. If the flow rate increases to 1,000 GPM, then the friction loss will increase to:
```
FL = 2 2(squared) x 4
FL = 4 x 4
FL = 16 psi
```
137
The condensed "Q" formula for a 4-inch hoseline is:
FL = Q2 / 5
138
Hard suction hoses generally have a diameter of between:
4 and 6 inches.
139
One advantage that electronic governors have over mechanical governors is that electronic governors can:
Maintain pressure in all other discharge lines if only one line trips the governor.
140
The big advantage of centrifugal pumps over positive displacement pumps is that centrifugal pumps:
Can provide water in variable pressures and volumes.
141
A major advantage of a positive displacement pump over a centrifugal pump is that it can:
pump air, making it self self-priming.
142
You've been assigned to drive an MWS apparatus that carries 5,000 gallons of water. While on duty, you are called to supply additional water to an attack apparatus responding to a fire at a home that is too far from available water sources. The fire apparatus is positioned on a two lane roadway. They've almost got the fire under control, but they are running low on water.
Identify two ways your MWS apparatus can supply the attack apparatus if the incident commander calls for a nurse tanker operation without a shuttle.
1) Use a discharge line from the pump of the nurse tanker to the attack apparatus.
2) The attack apparatus drafts directly from the nurse tanker's internal tank.
143
Multiple portable water tanks are recommended for fire incidents that require:
relatively high overall flow rates (more than 300 gpm.
144
Suppose the dump site and fill site are located one mile apart. A 2,000 gallon MWS apparatus is able to make the round trip in five minutes.
The total flow rate for that MWS apparatus, over a one mile distance, would be:
360 GPM
TFR=Amount of Water Dumped
____________________________
Trip Time
Amount of Water Dumped = Tank Size - 10%
TFR= 2,000 -200
_____________
5
TFR= 1,800
_______
5
TFR= 360 GPM
145
You've been asked to help prepare a pre incident plan for water shuttle operations that may be needed at a small factory in your jurisdiction. The BEST choice for the route of travel between the fill site and the dump site is:
A five mile, circular route where the leg from the fill site would be downhill and the leg from the dump site would be uphill.
146
Identify TWO disadvantages of using a nurse tanker operation in a water shuttle.
1) all MWS apparatuses in the water shuttle are required to have a size-able fire pump.
2) dumping time for each MWS apparatus is significantly higher.
147
Identify FIVE factors that impact MWS apparatus performance.
loading times
unloading times
vehicle condition
tank size
drive-train capabilities
148
To determine the total flow rate using IFSTA's formula, divide the amount of water dumped by the:
travel time plus the handling time.
