Theory of Machine | Theory of Machine Objective Type Questions and answers

11. The cylinders inaero engines are arrangedalong.......

   A.parallel lines

   B.perpendiculr lines

   C.radial lines

   D.any ofthe above arrangements

   E.none of the above

12. The shaft of a steam turbine is usually rotated at......

   A.natural frequency of vibration

   B.much below the natural frequency of vibration

   C.much above the natural frequency of vibration

   D.there is no such criterion

   E.none of the above

13. Theeffect of hammer below can be reduced by.......

   A.fully balancing the reciprocating masses

   B.decreasing the speed

   C.usingtwo or three pairs of wheels coupled together

   D.all of the above

   E.(b) and (c) above

14. The critical speed depends on.......

   A.mass

   B. stiffness

   C.mass,stiffness

   D.mass,stiffness and eccentricty

   E.none of the above

.15 The factor which affects critical speed shaft is.......

   A.eccentricity

   B.span of shaft

   C.diameter of disc

   D.all of above

   E.none of the above

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