Answered: Criteria Motor X Motor Y Expected…

Criteria Motor X Motor Y Expected useful life 5 years 5 years Initial cost $300 $400 Efficiency at the operating point 0.75 0.85 Estimated $12 per year $10 per year maintenance cost

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter1: Introduction To Statics

Section: Chapter Questions

Problem 1.12P: A differential equation encountered in the vibration of beams is d4ydx4=2D where x = distance...

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Question

Imagine that as an engineering intern you have been assigned the task of selecting a motor for a pump. After reviewing motor catalogs, you narrow your choice to two motors that are rated at 1.5 kW. Additional information collected is shown in an accompanying table. The pump is expected to run 4200 hours every year. After checking with your electric utility company, you determine the average cost of electricity is about 11 cents per kWh. Based on the information given here, which one of the motors will you recommend to be purchased?

Criteria
Motor X
Motor Y
Expected useful life
5 years
5 years
Initial cost
$300
$400
Efficiency at the
operating point
0.75
0.85
Estimated
$12 per year $10 per year
maintenance cost

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