Engineering Machine - Engineering Machine objective questions and answers


46. Forces are called concurrent when their lines of action meet in.......


   A.one point

   B.two point

   C.plane

   D.perpendicular planes

   E.different planes


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A.one point

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47. If a number of forces act simultaneously on a particle, it is possible.......


   A.not a replace them by a single force

   B.to replace them by singel force

   C.to replace them by a singel force through C.G.

   D.to replace them by a couple

   E.to replace them by a couple and a force


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B.to replace them by singel force

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48. The maximum efficiency of a screw jack with square theads and friction angle of 30* van be.........


   A.100%

   B.50%

   C.33%

   D.30%

   E.11%


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C.33%

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49. In planetary motion, following parameter remains constant......


   A.angular velocity

   B.linear velocity

   C.angular acceleration

   D.total angular momentum

   E.angular speed


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D.total angular momentum

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50. Power is defined as.......


   A.rate of doing work

   B.capacity of doing work

   C.power of doing work

   D.all of the above

   E.none of the above


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A.rate of doing work

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