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CDC - Mobile Water Supply Exam Questions and Answers
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CDC - Mobile Water Supply Exam Questions and Answers
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CDC - Mobile Water SupplyHow many inches of mercury should the priming device and pump achieve? - Answer-22 inches
Explain the priming device test. - Answer-Evaluates how quickly a priming device can create the
necessary vacuum to bring water through a pump to the discharge hose.
According to what NFPA, how much water must an apparatus carry to be considered a MWS or Tender?
- Answer-NFPA 1901 Standard for Automotive Fire Apparatus,
At least 1,000 gallons.
Most MWS apparatuses in use today carry, how many gallons of water? - Answer-Between 1,500 and
3,000 gallons of water.
Each department must choose the size of the tank for its apparatus based on what? - Answer-Local
water requirements
Water system limitations
Road conditions
,Bridge weight restrictions
What size water tanks are the most efficient during water shuttle operations? - Answer-MWS with tanks
less than 2,500 gallons.
What size water tanks are the most efficient during stationary water supply operations? - Answer-MWS
with tanks for the 2,500 gallons.
What three external fill connections can be equipped on the MWS apparatus? - Answer-1. Allows the
tank to be filled at a min rate of 1,000 gals/min.
2. Equipped with a valve, strainer, and a 30 degree elbow.
3. Has Valves of slow-closing design (if three inches or larger).
Where should the tank discharge be located on the MWS apparatus? - Answer-On the left, right, and
rear of the apparatus.
The tank discharge should be capable of discharging how much of the tank volume at what rate? -
Answer-90% of the tank volume at an average of 1,000 gpm.
Medium diameter hose supply lines are used for filling then... - Answer-the MWS should have at least
two external or direct tank fill intakes piped directly to the tank.
Large diameter hose is used then... - Answer-one connection to the tank is adequate.
If the MWS apparatus is equipped with a FIRE PUMP, it may be referred to as a...
and must have a tank-to-pump line that is: - Answer-Tanker-pumper or a tender-pumper.
1. Capable of supplying the pump with a 500 gpm until at least 80% of the water in the tank is emptied.
2. At least two inches diameter.
, The large tank discharge is commonly referred to as: - Answer-Dump valve
What NFPA requires three dump valves to be installed on all MWS apparatus? - Answer-NFPA 1901
As you move around the apparatus, what general problems are you looking for? - Answer-Fluid leaks,
dents, low tire pressure, cleanliness, and broken, or missing equipment.
When looking at the body panel, what should you be looking for? - Answer-Looking for rust, dents, or
exposed areas needing touch-up paint.
When looking at the windows and exterior lights, what should you be looking for? - Answer-Looking for
cracks and discoloration.
When looking at the circuit breakers and/or fuses what should you be looking for? - Answer-Looking at
the main panel to see if any circuits are tripped or if any fuses are blown.
Engine compartment: Engine oil - Answer-Check whether engine oil is clean and at full mark.
Engine compartment: air Filter Restriction Gauge - Answer-Check the air filter restriction gauge to
determine if the air filter needs to be changed.
Engine compartment: Coolant Overflow Reservoir - Answer-Coolant in the overflow reservoir should be
clean and halfway between max and min level for your apparatus.
Engine compartment: Cooling Fan, Hoses, and Radiator - Answer-Check the cooling fan, hoses, and the
radiator for cracks.
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