1. Test instruments are vital for accurate troubleshooting (page 367).
2. Voltage unbalance will cause immediate motor failure (page 369).
3. The microhmmeter can be used for comparison testing motors larger than 10 horsepower (page 372). T_ F
4. A tachometer can be used to determine whether a motor is overloaded (page 373). T_ F
5. The main use for the megohmmeter is to test insulation between the winding and the frame of a motor (pages 374-375). T_ F
6. An infrared gun (like a voltmeter) should be standard equipment in the toolbox (pages 376-377). T_ F
7. The electronic stethoscope can be used for preventive maintenance (page 377). T_ F
8. The surge tester is the only instrument that will reliably stress turn-toturn insulation (pages 378-379). T_ F
9. The polarization index test will work on all motors (pages 381-383).
10. The polarization index test should be done immediately after a motor has been shut off (page 383). T_ F
11. The step voltage test will work on all motors (page 385). T_ F
12. The high-potential test voltage should never be applied to a winding when it is set at its full value (pages 385-386). T_ F
13. The high-potential test is done to check phase-to-phase insulation
(page 385). T_ F
14. 2 x rated voltage + 1000 volts for one minute is acceptable for all motors (page 385). T_ F
15. What are three signs of power quality problems (pages 386-388)?
16. Give two reasons for improving an industry’s power factor (pages 386-388).
17. Vibration analysis and balancing are limited to electric motors
(pages 388-389). T_ F
18. Laser alignment is the most reliable method to reduce coupling vibration (pages 389-390). T_ F
19. Particle analysis can predict bearing and gear problems in gearboxes
(page 390). T_ F