Engineering Machine - Engineering Machine objective questions and answers


1. For a machine to be self-locking,its efficiency should be.......


   A.100%

   B.less than 67%

   C.less than 50%

   D.more than 50%

   E.none of the above


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C.less than 50%

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2. In actual machines.......


   A.mechanical advantage is greater than velocity ratio

   B.mechanical advantage is equal to velocity ratio

   C.mechanical advantage is less than velocity ratio

   D.mechanical advantage is unity

   E.none of the above


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C.mechanical advantage is less than velocity ratio

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3. In ideal machines.........


   A.mechanical advantage is greater than velocity ratio

   B.mechanical advantage is equal to velocity ratio

   C.mechanical advantage is less than velocity ratio

   D.mechanical advantage is unity

   E.none of the above


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B.mechanical advantage is equal to velocity ratio

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4. The multi stage compression as compared to single stage compression......


   A.Improves volumetric efficiency for the given pressure ratio

   B.Reduces work done per kg of air

   C.Reduces cost of compressor

   D.Gives more uniform torque

   E.All of the above


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E.All of the above

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5. A pair of smith's tongs in an example of the lever of.......


   A.zeroth order

   B.first order

   C.second order

   D.third order

   E.fourth order


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C.second order

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