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The differential screw is used in a

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The efficiency of a power screw is a function of

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What is the number of threads in engagement with the screw?

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Which one of the following is the avergae shear stress over the screw thread?

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The maximum efficiency of a screw jack having square threads with friction angle

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In case of power screws what is the combination of materials used for the screw and the nut?

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In case of power screws what is the combination of materials used for the screw and the nut?

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Stresses in a screw thread are estimated by considering the thread to be

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‘V’ threads are usually not used for this application due to low efficiency. This is because

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Consider the following statements regarding power screws.

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Which one of the following is the value of helix angle for maximum efficiency of a square threaded screw?

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The condition for the maximum efficiency for motion up and motion down the plane is

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If P is the pitch of a square theread, then the depth of thread d is given by

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A screw jack is said to be self – locking if its efficiency is

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Buttress thread is a modified square thread profile which is employed on the lead screw of

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The power requirement of the machine at the same rpm

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The following parameters are to be calculated while designing screw jack

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Which of the following screw thread is adopted for power transmission in either direction?

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The diameter of tommy bar for a screw jack is designed for

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The maximum efficiency of self locking screw is

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