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

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

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%

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

   A.angular velocity

   B.linear velocity

   C.angular acceleration

   D.total angular momentum

   E.angular speed

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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