1. How many inches of mercury should the priming device and pump achieve?-
ANS >>> 22 inches
2. Explain the priming device test. ANS >>> Evaluates how quickly a priming
device can create the necessary vacuum to bring water through a pump to the
discharge hose.
https://www.stuvia.com/en-us/user/techgrades
, 3. According to what NFPA, how much water must an apparatus carry to
be considered a MWS or Tender? ANS >>> NFPA 1901 Standard for
Automotive Fire Apparatus,
At least 1,000 gallons.
4. Most MWS apparatuses in use today carry, how many gallons of water? AN
>>> -
Between 1,500 and 3,000 gallons of water.
5. Each department must choose the size of the tank for its apparatus based
on what? ANS >>> Local water requirements
Water system limitations
Road conditions
Bridge weight restrictions
6. What size water tanks are the most efficient during water shuttle opera-
tions? ANS >>> MWS with tanks less than 2,500 gallons.
https://www.stuvia.com/en-us/user/techgrades
, 7. What size water tanks are the most efficient during stationary water supply
operations? ANS >>> MWS with tanks for the 2,500 gallons.
8. What three external fill connections can be equipped on the MWS appara-
tus? ANS >>> 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).
9. Where should the tank discharge be located on the MWS apparatus? ANS
>>> On the left, right, and rear of the apparatus.
10. The tank discharge should be capable of discharging how much of the tank
volume at what rate? ANS >>> 90% of the tank volume at an average of 1,000
gpm.
11. Medium diameter hose supply lines are used for filling then... ANS >>> the
MWS should have at least two external or direct tank fill intakes piped directly to
the tank.
12. Large diameter hose is used then... ANS >>> one connection to the tank is
adequate.
https://www.stuvia.com/en-us/user/techgrades
ANS >>> 22 inches
2. Explain the priming device test. ANS >>> Evaluates how quickly a priming
device can create the necessary vacuum to bring water through a pump to the
discharge hose.
https://www.stuvia.com/en-us/user/techgrades
, 3. According to what NFPA, how much water must an apparatus carry to
be considered a MWS or Tender? ANS >>> NFPA 1901 Standard for
Automotive Fire Apparatus,
At least 1,000 gallons.
4. Most MWS apparatuses in use today carry, how many gallons of water? AN
>>> -
Between 1,500 and 3,000 gallons of water.
5. Each department must choose the size of the tank for its apparatus based
on what? ANS >>> Local water requirements
Water system limitations
Road conditions
Bridge weight restrictions
6. What size water tanks are the most efficient during water shuttle opera-
tions? ANS >>> MWS with tanks less than 2,500 gallons.
https://www.stuvia.com/en-us/user/techgrades
, 7. What size water tanks are the most efficient during stationary water supply
operations? ANS >>> MWS with tanks for the 2,500 gallons.
8. What three external fill connections can be equipped on the MWS appara-
tus? ANS >>> 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).
9. Where should the tank discharge be located on the MWS apparatus? ANS
>>> On the left, right, and rear of the apparatus.
10. The tank discharge should be capable of discharging how much of the tank
volume at what rate? ANS >>> 90% of the tank volume at an average of 1,000
gpm.
11. Medium diameter hose supply lines are used for filling then... ANS >>> the
MWS should have at least two external or direct tank fill intakes piped directly to
the tank.
12. Large diameter hose is used then... ANS >>> one connection to the tank is
adequate.
https://www.stuvia.com/en-us/user/techgrades
