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


✔ View Answer


D.11.2 km/sec

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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


✔ View Answer


C.the mid point of its axis

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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


✔ View Answer


A.one-fourth of the total height above base

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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


✔ View Answer


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

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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


✔ View Answer


A.rate of doing work

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