Engineering Machine - Engineering Machine objective questions and answers

26. The escape velocity on the surface of the earth is.......

   A.1 km/sec

   B.3.6 km/sec

   C.8.8 km/sec

   D.11.2 km/sec

   E.14.9 km/sec

27. The centre of gravity of a unifrom lamina lies at.......

   A.the centre of heavy portion

   B.the bottom surface

   C.the mid point of its axis

   D.all of the above

   E.none of the above

28. Centre of gravity of a solid cone lies on the axis at the height.........

   A.one-fourth of the total height above base

   B.one-third of the total height above base

   C.one-half of the total height above base

   D.three-eighth of the total height above the base

   E.none of the above

29. Centre of percussion is......

   A.the point of C.G

   B.the point of metacentre

   C.the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis

   D.point of suspension

   E.the point in a body about which it can rotate horizontally and ascillate under the influence of gravity

30. 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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