A LEV system has a centrifugal fan rotating at 714 rpm. The airflow is 6210 cfm, the fan total pressure is 4.07” w.g., and the brake horsepower is 3.12 hp. If the rotating speed is decreased to 620 rpm, what are the brake horsepower? a. 1.43 hp b. 2.04 hp c. 2.41 hp d. 2.67 hp 2.A LEV system has a centrifugal fan rotating at 714 rpm. The airflow is 6210 cfm, the fan total pressure is 4.07” w.g., and the brake horsepower is 3.12 hp. If the rotating speed is decreased to 620 rpm, what are the new value for fan total pressure? 4.15" w.g. 3.87" w.g. 3.07" w.g. 3.94" w.g.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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1. A LEV system has a centrifugal fan rotating at 714 rpm. The airflow is 6210 cfm, the fan total pressure is 4.07” w.g., and the brake horsepower is 3.12 hp. If the rotating speed is decreased to 620 rpm, what are the brake horsepower? a. 1.43 hp b. 2.04 hp c. 2.41 hp d. 2.67 hp 2.A LEV system has a centrifugal fan rotating at 714 rpm. The airflow is 6210 cfm, the fan total pressure is 4.07” w.g., and the brake horsepower is 3.12 hp. If the rotating speed is decreased to 620 rpm, what are the new value for fan total pressure? 4.15" w.g. 3.87" w.g. 3.07" w.g. 3.94" w.g.
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