The motor in close are used for collieries, chemical plant is
A) Flame proof type
B) Splash proof type
C) Totally enclosed type
D) Pipe ventilated type
Correct Answer:
Verified
Q3: The range of ratings of electric motor
Q4: When an electric train is moving down
Q5: Speed controlled by variation of field flux
Q6: The slip power recovery scheme is used
Q7: The pair used for frequency converter is
A)Squirrel
Q9: The motor enclosure used in wood-working industry
Q10: The motor enclosure used for industrial purposes
Q11: Ball-bearings are
A)Used up to 75 kW motors
B)Of
Q12: Sleeve bearings
A)Are normally of bronze
B)Have self lubricating
Q13: Hot bearings of a DC motor may
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