How many pieces make up the shaft of a DC machine ?
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1
What is the percent of slip for a three - phase 60 Hz motor that has 6 poles and
rotates at 1157 rpm ?
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3.58 %
,What is the result of an improperly balanced armature
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Vibration
Which of the following describes a pole piece's inability to proportionally change its
magnetic flux as changes in voltage occur ?
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Hysteresis losses
Which of the following is used to lubricate a sleeve bearing ?
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Oil
The pole pieces of a DC Motor are made of many thin layers of iron or steel called
___?
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Laminations .
, Which of the following uses a pigtail
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Brush
Which material should you use to seat brushes ?
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Sandpaper
What circuit is used for preventing build - up of circulating current when the
generator field is de - energized ?
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Suicide
The neutral plane is ___?
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The points in a coil's rotation where zero voltage is induced
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1
What is the percent of slip for a three - phase 60 Hz motor that has 6 poles and
rotates at 1157 rpm ?
Give this one a try later!
3.58 %
,What is the result of an improperly balanced armature
Give this one a try later!
Vibration
Which of the following describes a pole piece's inability to proportionally change its
magnetic flux as changes in voltage occur ?
Give this one a try later!
Hysteresis losses
Which of the following is used to lubricate a sleeve bearing ?
Give this one a try later!
Oil
The pole pieces of a DC Motor are made of many thin layers of iron or steel called
___?
Give this one a try later!
Laminations .
, Which of the following uses a pigtail
Give this one a try later!
Brush
Which material should you use to seat brushes ?
Give this one a try later!
Sandpaper
What circuit is used for preventing build - up of circulating current when the
generator field is de - energized ?
Give this one a try later!
Suicide
The neutral plane is ___?
Give this one a try later!
The points in a coil's rotation where zero voltage is induced
