50 n = 1170 r/min 800 40 NPSH 30 700 - 36-in dia. 20 = 600 32-in dia. 500 2500 bhp 400 28-in dia. 1500 bhp 300 200 20 24 28 12 16 U.S. gallons per minute x 1000 NPSH, ft %88 3500 bhp 87%, %L8 %78- 3000 bhp: 72% 2000 bhp 8. Total head, ft 4.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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The 28-in-diameter pump in Fig. at 1170 r/min is
used to pump water at 20°C through a piping system at
14,000 gal/min. (a) Determine the required brake horsepower.
The average friction factor is 0.018. (b) If there is
65 ft of 12-in-diameter pipe upstream of the pump, how far
below the surface should the pump inlet be placed to avoid
cavitation?

50
n = 1170 r/min
800
40
NPSH
30
700
- 36-in dia.
20
= 600
32-in dia.
500
2500 bhp
400
28-in dia.
1500 bhp
300
200
20
24
28
12
16
U.S. gallons per minute x 1000
NPSH, ft
%88
3500 bhp
87%,
%L8
%78-
3000 bhp:
72%
2000 bhp
8.
Total head, ft
4.
Transcribed Image Text:50 n = 1170 r/min 800 40 NPSH 30 700 - 36-in dia. 20 = 600 32-in dia. 500 2500 bhp 400 28-in dia. 1500 bhp 300 200 20 24 28 12 16 U.S. gallons per minute x 1000 NPSH, ft %88 3500 bhp 87%, %L8 %78- 3000 bhp: 72% 2000 bhp 8. Total head, ft 4.
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