The nominal diameter of the screw is 22mm and the allowable bearing pressure for the nut is 15N//mmÂ². Find the length of the nut if pitch of the screw is

Mechanical Engineering : Machine Design - Quiz(MCQ)

30mm

25mm

20mm

15mm

Correct Answer : Option (D) : 15mm

Explanation : z=4W/π S(dâ‚²-dâ‚‚²) where S=15N/mm²,dâ‚=22mm and dâ‚‚=17mm. Hencez=2.2 or z=3. Length of nut=zp or l=3 x 5= 15mm.

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Which type of rope drum is preferred?

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Both are equally preferred

None of the above

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Small sheaves are preferred over large sheaves on what parameters?

Higher cost of small sheaves

Increasingly centrifugal force in large sheaves

Preferring centrifugal force reduction even for more money

None of the above

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