V5-C4 Flashcards
What is the formula to ascertain gallons per minute flow through a smooth orifice
(29.7 D.²) ^/P
Rated pump capacity pressures
150 psi 100%
200 psi 70%
250 psi 50%
At Draft with a 10 foot lift
What is the maximum working pressure established by the department
250 pounds a reserve of 50 PSI is desirable for elevation change or other provisions so 200 psi is considered the maximum working pressure
How do you increase the maximum distance that water can be delivered
1 increasing the size of hose
2 provide additional lines
3 using additional pumpers
What is the maximum pressure you can pump during a relay operation
175 pounds
200 pounds total working pressure -25 pounds allowed for the intake pressure equals 175 of friction loss
Available flow from the hydrant is calculated how
Testing and noting the static pressure (water at rest) and the residual pressure (water in motion) of fire hydrants
What is the fire flow percent chart for like volumes
10% or less equals three like volumes
11 to 15% drop indicates to like volumes
16 to 25% drop indicates one like volume
How do you connect to a automatic sprinkler system and what do you pump it at
Connect with a 2 1/2 inch hose line and maintain engine pressure of 150 pounds
What is the minimum allowance for efficient coverage for sprinkler heads
15 GPM minimum acceptable efficient range of 15 to 25 GPM
What is the weight in water Per minute of a fire stream delivering 250 GPM
1 ton of water per minute delivered into a building
Formula for volume of a cylindrical tank
6D.²xH
Cubic foot of water equals how many gallons
7.481 gallons
Gallon of water weighs how much
8.335 pounds
Cubic foot of water weighs how much
62.4 pounds
US gallons equals how many cubic inches
231 in.³
