25.a. A two-stage compressor with a capacity of 1000 dm compresses 100 cu ft of free air per minute to a pressure of 100 psi. What is the required bhp? A. 4 B. 14 C. 8 D. 18 25.b. A centrifugal fan...

25.a. A two-stage compressor with a capacity of 1000 dm compresses 100 cu ft of free air per minute to a
pressure of 100 psi. What is the required bhp?
A. 4
B. 14
C. 8
D. 18

25.b. A centrifugal fan running at 100 rpm delivers air at the rate of 6000 dm at a pressure of 1 oz per sq in.
and requires 2 hp. At 300 rpm it delivers 18,000 cu ft of air per minute. What is the horsepower required?
End of exam
A. 27
B. 54
C. 9
D. 18