21. |
What should be the reason? Thermal overload protection operates while the motor is running
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Answer:
Option (d) |
22. |
What should be the reason? Motor produce humming sound.
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Answer:
Option (d) |
23. |
What should be the reason? Motor runs at a slow speed
|
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Answer:
Option (d) |
24. |
What should be the reason? Motor runs at a very fast speed
|
||||||||
Answer:
Option (d) |
25. |
The motor in close is used for collieries, the chemical plant is
|
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Answer:
Option (a) |
26. |
The motor enclosure used in the wood-working industry is
|
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Answer:
Option (b) |
27. |
The motor enclosure used for industrial purposes is
|
||||||||
Answer:
Option (a) |
28. |
15 minute rated motors are suitable for
|
||||||||
Answer:
Option (a) |
29. |
For medium-duty cranes the short time rating motor used is
|
||||||||
Answer:
Option (c) |
30. |
While selecting a motor for air-conditioner the feature of utmost importance is
|
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Answer:
Option (c) |