For medium duty cranes the short time rating motor used is
A) 10 minutes
B) 15 minutes
C) 30 minutes
D) any of the above
Correct Answer:
Verified
Q12: Sleeve bearings
A)Are normally of bronze
B)Have self lubricating
Q13: Hot bearings of a DC motor may
Q14: The least expensive drive is
A)Belt drive
B)Rope drive
C)Chain
Q15: For very high speed ratio the indispensable
Q16: 15 minute rated motors are suitable for
A)Light
Q18: The cost of an induction motor will
Q19: Which of the following motors has series
Q20: Which of the following motors is preferred
Q21: For crane travel which off the following
Q22: Which of the following happens when start
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