Take The Electric Motor Challenge
10 Questions
| Attempts: 289
Test your knowledge with this PdMA Sponsored Ten Question Quiz about Electric Motors.
Questions and Answers
- 1.The normal expected in-rush current of a motor is twice the full load amperage rating of the motor.
- A.
True
- B.
False
- 2.Ohms law is stated as:
- A.
E= R/I
- B.
I= R/E
- C.
E= I*R
- D.
R=I*E
- 3.Per IEEE std. 43-2000 recommendations, when testing insulation on motors rated between 2501-5000 volts you should use 2500-5000 Volts.
- A.
True
- B.
False
- 4.Inductance is the characteristic of an electrical circuit that opposes the starting, stopping, or changing of current flow.
- A.
True
- B.
False
- 5.Current leads voltage in an inductive circuit.
- A.
True
- B.
False
- 6.Per IEEE std. 43-2000 recommendations, the minimum insulation resistance for most DC armature and AC windings built after 1970 (form wound coils) is 100 Megohms.
- A.
True
- B.
False
- 7.Limits for Total Harmonic Distortion (THD) of voltage and current are governed by IEEE std. 519.
- A.
True
- B.
False
- 8.Motor insulation has a negative temperature coefficient meaning that as temperature increases resistance decreases.
- A.
True
- B.
False
- 9.The minimum polarization index reading for class H insulation is 1.5.
- A.
True
- B.
False
- 10.A high pole-pass frequency sideband amplitude is indicative of a motor defect in which of the following motor fault zones:
- A.
Stator
- B.
Power Quality
- C.
Power Circuit
- D.
Rotor
- E.
Air gap
- F.
Insulation
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