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NFPA D O Mobile Water Supply Practice Questions - NFPA 1002 Driver/Operator - Mobile Water Supply Apparatus Exam
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Question
1
of 25
QUESTION 1 / 25
In a typical water shuttle operation, what are the three main components that must work together to maintain continuous flow?
Choose one answer below.
A
Fill site, attack pumper, and dispatch
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B
Fill site, mobile water supply apparatus, and dump site
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C
Drafting pumper, foldatank, and supply hose
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D
Hydrant, LDH, and master stream
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QUESTION 2 / 25
A 3000-gallon tanker takes 5 minutes to fill, 8 minutes to travel one way, 3 minutes to dump, and 8 minutes to return. What is the continuous flow capability of this single tanker?
Choose one answer below.
A
125 gpm
✓
B
150 gpm
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C
200 gpm
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D
250 gpm
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QUESTION 3 / 25
Per NFPA 1142, the minimum water supply for a rural structure is calculated primarily from which factors?
Choose one answer below.
A
Distance to hydrant and apparatus arrival time
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B
Structure total volume, construction-classification number, and occupancy hazard classification
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C
Number of crew members and ladder length
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D
Roof type and number of windows
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QUESTION 4 / 25
Which role is typically assigned at the dump site of a water shuttle operation?
Choose one answer below.
A
Fill site officer who supervises drafting from the static source
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B
Dump site officer who manages portable tank setup and tanker offload sequence
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C
Safety chief who runs the staging area
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D
Communications officer who relays radio traffic
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QUESTION 5 / 25
If continuous flow demand is 500 gpm and each tanker delivers 125 gpm per cycle, how many tankers are required in the shuttle?
Choose one answer below.
A
2
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B
3
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C
4
✓
D
5
✓
QUESTION 6 / 25
Which fill site setup typically allows the fastest tanker loading?
Choose one answer below.
A
Single 2.5-inch supply line through the tank fill
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B
Two LDH supply lines into a direct tank fill or top fill
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C
Booster line through a side hatch
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D
Auxiliary intake with a check valve and forester nozzle
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QUESTION 7 / 25
A 2000-gallon tanker is filled at 1000 gpm and dumped at 1200 gpm. What are the fill and dump times respectively?
Choose one answer below.
A
1.0 min fill / 0.83 min dump
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B
2.0 min fill / 1.67 min dump
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C
3.0 min fill / 2.5 min dump
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D
5.0 min fill / 4.0 min dump
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QUESTION 8 / 25
Which formula best expresses single-tanker continuous flow capability?
Choose one answer below.
A
Tank capacity × cycle time
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B
Tank capacity ÷ cycle time
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C
Cycle time ÷ tank capacity
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D
Capacity + travel time
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QUESTION 9 / 25
Per NFPA 1142, water supply requirements typically increase for which condition?
Choose one answer below.
A
Lightweight wood-frame construction with high occupancy hazard
✓
B
Fire-resistive construction with low hazard occupancy
✓
C
Detached storage shed with no exposures
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D
Large lot with paved access
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QUESTION 10 / 25
What is the primary purpose of staggering tanker arrivals at the dump site during a long shuttle?
Choose one answer below.
A
Provide rest breaks for drivers
✓
B
Maintain a continuous flow into portable tanks without idle waits
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C
Reduce fuel use
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D
Allow inspection of each tanker between dumps
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QUESTION 11 / 25
Travel distance between fill and dump sites doubles. Assuming constant speed, what happens to shuttle continuous flow per tanker?
Choose one answer below.
A
Doubles
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B
Stays the same
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C
Decreases because total cycle time increases
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D
Increases because dump time decreases
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QUESTION 12 / 25
What is the recommended minimum number of portable tanks for a continuous water shuttle dump site delivering high flows?
Choose one answer below.
A
One portable tank
✓
B
Two portable tanks linked with a jet siphon
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C
Three tanks each with a separate pumper
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D
Four tanks placed in a square
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QUESTION 13 / 25
Which factor most directly limits the maximum sustainable fill rate at a static source draft fill site?
Choose one answer below.
A
Length of the tanker dump hose
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B
Pumper's drafting capability and supply hose layout
✓
C
Air temperature
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D
Number of crew members at the fill site
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QUESTION 14 / 25
A community needs 24,000 gallons over 2 hours per NFPA 1142 calculation. What average sustained shuttle flow is required?
Choose one answer below.
A
100 gpm
✓
B
200 gpm
✓
C
250 gpm
✓
D
400 gpm
✓
QUESTION 15 / 25
Which step most reduces fill-site cycle time?
Choose one answer below.
A
Switching to a smaller diameter supply line
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B
Pre-staging connections and using dual LDH supply with a top fill
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C
Adding extra appliances inline
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D
Waiting for the engine to cool before refilling
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QUESTION 16 / 25
How does adding a relief or spare tanker to a shuttle most affect operations?
Choose one answer below.
A
It lowers average gpm because more vehicles are in queue
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B
It increases reliability of continuous flow by absorbing mechanical or one-off delays
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C
It eliminates the need for a fill-site officer
✓
D
It allows reducing portable tank counts
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QUESTION 17 / 25
A shuttle uses two 3000-gallon tankers with a 20-minute cycle each. What is the combined continuous flow capability?
Choose one answer below.
A
150 gpm
✓
B
200 gpm
✓
C
300 gpm
✓
D
600 gpm
✓
QUESTION 18 / 25
Which NFPA 1142 construction class generally has the LOWEST required water supply factor?
Choose one answer below.
A
Wood frame
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B
Ordinary construction
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C
Heavy timber
✓
D
Fire-resistive
✓
QUESTION 19 / 25
What is the BEST practice for sequencing tanker traffic flow at fill and dump sites?
Choose one answer below.
A
Bi-directional travel on the same route
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B
Two-way drive-through patterns with no backing
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C
Backing into all positions to save time
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D
Random routing to avoid congestion
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QUESTION 20 / 25
If a tanker's usable capacity is 90% of its nominal 3000-gallon tank, what value should be used in shuttle math?
Choose one answer below.
A
3000 gallons
✓
B
2700 gallons
✓
C
2400 gallons
✓
D
1500 gallons
✓
QUESTION 21 / 25
Per NFPA 1901, longitudinal and transverse baffles are required in apparatus water tanks with capacity exceeding what threshold?
Choose one answer below.
A
300 gallons
✓
B
500 gallons
✓
C
1000 gallons
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D
2000 gallons
✓
QUESTION 22 / 25
What is the primary function of a tank vent on a mobile water supply apparatus?
Choose one answer below.
A
Allow air to enter as water exits and escape during filling to prevent tank deformation
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B
Provide a foam concentrate fill point
✓
C
Indicate water level remotely
✓
D
Cool the pump during operation
✓
QUESTION 23 / 25
Which dump valve configuration typically achieves the FASTEST tank offload time?
Choose one answer below.
A
Single 6-inch rear dump
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B
Square dump (rear plus both sides)
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C
Side dump only
✓
D
Two 2.5-inch gated outlets
✓
QUESTION 24 / 25
Per NFPA 1901, a mobile water supply apparatus is generally defined by which minimum water tank capacity?
Choose one answer below.
A
500 gallons
✓
B
750 gallons
✓
C
1000 gallons
✓
D
1500 gallons
✓
QUESTION 25 / 25
Why is weight distribution critical on a mobile water supply apparatus?
Choose one answer below.
A
It changes the paint scheme requirements
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B
It affects axle loading, handling, braking, and rollover stability
✓
C
It controls the radio range
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D
It governs the foam ratio
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