16 During a prony brake test on a motor (see Fig. 4), the following scale and speed read- ings were noted: P₂ = 5 lbf n = 1160 r/min If the diameter of the pulley is 12 inches, calculate the power output of the motor in kilowatts and in horsepower. P₁ = 28 lbf

16 During a prony brake test on a motor (see Fig. 4), the following scale and speed read- ings were noted: P₂ = 5 lbf n = 1160 r/min If the diameter of the pulley is 12 inches, calculate the power output of the motor in kilowatts and in horsepower. P₁ = 28 lbf

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter5: Components, Symbols, And Circuitry Of Air-conditioning Wiring Diagrams

Section: Chapter Questions

Problem 14RQ: What is the difference between a thermal overload and a magnetic overload? Draw the symbol for each.

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Question

chapter 3 problem 16 I need some help with this question.

8P
Figure 4
Prony brake.
P₂ =
5 N
n = 1700 r/min
V
P₁ =
25 N
r=
0.1 m

16 During a prony brake test on a motor (see
Fig. 4), the following scale and speed read-
ings were noted:
P₂ = 5 lbf
n = 1160 r/min
If the diameter of the pulley is 12 inches,
calculate the power output of the motor in
kilowatts and in horsepower.
P₁ = 28 lbf

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