CDC - MWS Water Shuttle Ops.
What three factors are used to measure the efficiency of an MWS apparatus? -
correct answer Filling Time
Dumping Time
Travel time between the dump and fill sites
What are the two methods for determining a total flow rate for an individual MWS? -
correct answer 1. Actual Testing
2. Formula Calculation
What procedures are used when using the actual testing method? - correct answer
1. Position/park MWS so its ready to begin dumping into a portable tank.
2. Start clock when dump valve is opened.
3. Clock will run until the MWS returns to the dump site.
4. Clock is stopped when MWS is back in the proper position to dump it's next load.
5. Use: Amount of water dumped divided by the trip time to find the Total Flow Rate.
How is the amount of water dumped calculated? - correct answer The tank size in
gallons minus ten percent.
The ten percent accounts for water that may have spilled or remains in the tank
after the dump valve is closed.
As an example, what is 10% of a 5,000 gallon tank? - correct answer 4,500 Gallons
TFR= 5,000 - 10%/Trip Time
TFR= 4,500/Trip Time
If the amount of water dumped out of a MWS is 4,500 gals and the trip time took 10
minutes, what is the TFR? - correct answer TFR = 4,500gal/10min
TFR= 450 gpm for 1 mile shuttle op.
