P
OCKET
R
EFERENCE
G
UIDE
— 41
Calculating Aqueduct Slope —
An aqueduct should be sloped so that
water travels less than ten feet per minute.
After a heavy rainfall, the water traveled at
an approximate velocity of 1.72 inches per
second. Is the aqueduct sloped correctly?
KEYSTROKES
DISPLAY
1. Clear calculator:
o o
0.
2. Enter 1.72 ips then convert to ft/min:
1 • 7 2 s i
1.72
IPS
Ç s y
8.6
FPM
*
* Because 8.6 fpm is less than 10 fpm, the aque-
duct is sloped correctly.
The faucet in a house should provide 4.5
gallons of water per minute. If you have a
two liter bottle that filled up in 12 seconds,
is the faucet within code?
KEYSTROKES
DISPLAY
1. Clear calculator:
o o
0.
2. Divide liters/sec:
2 ÷ 1 2 =
0.166667
3. Enter as liters/sec.:
s L
0.166667
L
/
S
4. Convert to gal/min:
Ç s g
2.641721
GPM
*
* Because 2.641721 gpm is less than 4.5 gpm,
the faucet is not within code.
