University of Missouri
50 points
Answer questions 1-4 based on the nameplate shown above.
1. What is the frequency that this motor is designed to operate on?
A. 120 hertz
B. 66 hertz
C. 40 hertz
D. 60 hertz
2. What is the service factor of this motor?
A. 1.5
B. 60
C. 1.25
D. 1
3. What bearing would be needed to replace the bearing at the drive end of the motor?
A. BBD 116
B. BOB 117
C. BBB 116
D. 25380
4. What voltage does this motor operate at?
A. 120/240
B. 1725
C. 60
D. 500
5. Examine the electric motor control device. This device will activate the motor when?
A. humidity is increasing
B. humidity is decreasing
C. temperature is increasing
D. temperature is decreasing
Identify the specific motors and parts as tagged.
6. What type of electric motor is tagged # 6?
A. split phase
B. repulsion start
C. capacitor start
D. shaded pole
7. What is the name of the part tagged #7?
A. main windings
B. centrifugal device
C. auxiliary windings
D. wound rotor
8. What type of motor is tagged #8?
A. split phase
B. repulsion start
C. shaded pole
D. capacitor start
9. What part is tagged #9?
A. capacitor
B. centrifugal device
C. wound rotor
D. squirrel cage rotor
10. What type of motor is #10?
A. permanent split capacitor
B. repulsion start
C. split phase
D. Universal (series)
11. What part is tagged #11?
A. capacitor
B. centrifugal device
C. wound rotor
D. squirrel cage rotor
12. What type of motor is tagged #12?
A. permanent split capacitor
B. repulsion start
C. split phase
D. capacitor start
13. What part is tagged #13?
A. capacitor
B. wound rotor
C. squirrel cage rotor
D. centrifugal switch
14. Suppose that you have a 240 volt motor running your aeration fan on your grain bin. You know from the nameplate that the 3 HP motor draws 15 amps and has a power factor of 0.8. You plan on running the fan 24 hours a day for 76 days. If your electricity cost is $0.07 per kilowatt-hour what will your total cost be?
A. $ 73.54
B. $ 656.64
C. $1575.93
D. $ 367.72
15. Which motor would be the best choice for a hand tool that requires high torque, low weight, and variable speed?
A. universal (series)
B. repulsion start
C. split phase
D. capacitor start
16. Which motor would be the best choice for low torque load, 1/4 HP, that runs at 1175 rpm?
A. split phase
B. repulsion start
C. universal (series)
D. shaded pole
17. Which motor would be required for high torque starting loads in a 5 HP application?
A. split phase
B. two value capacitor
C. permanent split capacitor
D. shaded pole