Q. 1. A radial-flow pump has a 6-in.-diameter impeller, and the performance curv

Question

Q. 1. A radial-flow pump has a 6-in.-diameter impeller, and the performance curves for it are shown below. Determine the approximate flow it provides to pump water from the reservoir tank to the fill tank, where h- 115 ft. Neglect minor losses, and use a friction factor of f 0.02 for the 100-ft-long, 3-in.-diameter hose. Note, 7.48 gal-1 ft 30 20 65% 70% 1751-6in. dia. 50 5.5 in. dia. ?MF 1750 RPM 86%-80% 75% c 125 70% 5 in. dia. 65% 25 bhp 75 50 25 20 bhp 10 bhp 18 bhp 300 337 400 470 500 600 Flow Q (gal/min) 100 200 700 800

Explanation / Answer

The expression for simple interest is as follows:

A = P (1+rt)

Here A = 1100 + 56.29 = 1156.29 $

P = 1100 $

t = 0.5 year

1156.29 $ = 1100 $ * ( 1+ r*0.5 )

r = 0.102

So, the interest rate = 10 %

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