At least how many grooves should be on a drum of a winch system with a double pulley hoist system with lifting height from -3m to 18m elevation and 4 pulleys on the hook block? (Drum radius (Rt) = 300mm)    A) 92  B) 90  C) 46  D) 48  E) 47

Refrigeration and Air Conditioning Technology (MindTap Course List)
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ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter2: Matter And Energy
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At least how many grooves should be on a drum of a winch system with a double pulley hoist system with lifting height from -3m to 18m elevation and 4 pulleys on the hook block? (Drum radius (Rt) = 300mm)

 
 A)

92

 B)

90

 C)

46

 D)

48

 E)

47

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