121. The Bifilar suspension method is used to determine
(a) natural frequency of vibration
(b) position of balancing weights
(c) moment of inertia
(d) centripetal acceleration'
(e) angular acceleration of a body.
Ans: c
122. Which is the false statement about the properties of instantaneous center
(a) at the instantaneous center of rotation, one rigid link rotates instantaneously relative to another for the configuration of mechanism considered
(b) the two rigid links have no linear velocities relative to each other at the instantaneous center
(c) the two rigid links which have no linear velocity relative to each other at this center have the same linear velocity to the third rigid link
(d) the double center can be denoted either by 02\ or Ol2, but proper selection should be made
(e) none of the above.
Ans: d
123. Instantaneous center of rotation of a link in a four bar mechanism lies on
(a) right side pivot of this link
(b) lift side pivot of this link
(c) a point obtained by intersection on extending adjoining links
(d) can't occur
(e) none of the above.
Ans: c
124. The number of links and instantaneous centers in a reciprocating engine mechanism are
(a) 4, 4
(b) 4, 5
(c) 5, 4
(d) 6, 4
(e) 4, 6.
Ans: e
125. According to Kennedy's theorem, if three bodies have plane motions, their instantaneous centers lie on
(a) a triangle
(b) a point
(c) two lines
(d) a straight line
(e) a curve.
Ans: d
126. In a rigid link OA, velocity of A w.r.t. will be
(a) parallel to OA
(b) perpendicular to OA
(c) at 45° to OA
(d) along AO
(e) along OA.
Ans: b
127. Two systems shall be dynamically equivalent when
(a) the mass of two are same
(b) e.g. of two coincides
(c) M.I. of two about an axis through e.g. is equal
(d) all of the above
(e) none of the above.
Ans: d
128. The velocity of any point in mechanism relative to any other point on the mechanism on velocity polygon is represented by the line
(a) joining the corresponding points
(b) perpendicular to line as per (a)
(c) not possible to determine with these data
(d) at 45° to line as per (a)
(e) none of the above.
Ans: a
129. The absolute acceleration of any point P in a link about center of rotation 0 is
(a) along PO
(b) perpendicular to PO
(c) at 45° to PO
(d) along OP
(e) none of the above.
Ans: e
130. Angular acceleration of a link can be determined by dividing the
(a) centripetal component of acceleration with length of link
(b) tangential component of acceleration with length of link
(c) resultant acceleration with length of link
(d) all of the above
(e) none of the above.
Ans: b
131. Corioli's component of acceleration exists whenever a point moves along a path that has
(a) linear displacement
(b) rotational motion
(c) tangential acceleration
(d) centripetal acceleration
(e) none of the above.
Ans: b
132. The direction of Corioli's component of acceleration is the direction
(a) of relative velocity vector for the two coincident points rotated by 90° in the direction of the angular velocity of the rotation of the link
(b) along the centripetal acceleration
(c) along tangential acceleration
(d) along perpendicular to angular velocity
(e) none of the above.
Ans: a
133. In a shape mechanism, the Corioli's component of acceleration will
(a) not exist
(b) exist
(c) depend on position of crank
(d) unpredictable
(e) none of the above.
Ans: b
134. The magnitude of tangential acceleration is equal to
(a) velocity2 x crank radius
(b) velocity vcrankradius
(c) (velocity/crankradius)
(d) velocity x crank radius2
(e) none of the above.
Ans: b
135. Tangential acceleration direction is
(a) along the angular velocity
(b) opposite to angular velocity
(c) may be any one of these
(d) perpendicular to angular velocity
(e) none of the above.
Ans: c
Read More Questions:
Theory of Machines - Mechanical Engineering Part1
Theory of Machines - Mechanical Engineering Part2
(a) natural frequency of vibration
(b) position of balancing weights
(c) moment of inertia
(d) centripetal acceleration'
(e) angular acceleration of a body.
Ans: c
122. Which is the false statement about the properties of instantaneous center
(a) at the instantaneous center of rotation, one rigid link rotates instantaneously relative to another for the configuration of mechanism considered
(b) the two rigid links have no linear velocities relative to each other at the instantaneous center
(c) the two rigid links which have no linear velocity relative to each other at this center have the same linear velocity to the third rigid link
(d) the double center can be denoted either by 02\ or Ol2, but proper selection should be made
(e) none of the above.
Ans: d
123. Instantaneous center of rotation of a link in a four bar mechanism lies on
(a) right side pivot of this link
(b) lift side pivot of this link
(c) a point obtained by intersection on extending adjoining links
(d) can't occur
(e) none of the above.
Ans: c
124. The number of links and instantaneous centers in a reciprocating engine mechanism are
(a) 4, 4
(b) 4, 5
(c) 5, 4
(d) 6, 4
(e) 4, 6.
Ans: e
125. According to Kennedy's theorem, if three bodies have plane motions, their instantaneous centers lie on
(a) a triangle
(b) a point
(c) two lines
(d) a straight line
(e) a curve.
Ans: d
126. In a rigid link OA, velocity of A w.r.t. will be
(a) parallel to OA
(b) perpendicular to OA
(c) at 45° to OA
(d) along AO
(e) along OA.
Ans: b
127. Two systems shall be dynamically equivalent when
(a) the mass of two are same
(b) e.g. of two coincides
(c) M.I. of two about an axis through e.g. is equal
(d) all of the above
(e) none of the above.
Ans: d
128. The velocity of any point in mechanism relative to any other point on the mechanism on velocity polygon is represented by the line
(a) joining the corresponding points
(b) perpendicular to line as per (a)
(c) not possible to determine with these data
(d) at 45° to line as per (a)
(e) none of the above.
Ans: a
129. The absolute acceleration of any point P in a link about center of rotation 0 is
(a) along PO
(b) perpendicular to PO
(c) at 45° to PO
(d) along OP
(e) none of the above.
Ans: e
130. Angular acceleration of a link can be determined by dividing the
(a) centripetal component of acceleration with length of link
(b) tangential component of acceleration with length of link
(c) resultant acceleration with length of link
(d) all of the above
(e) none of the above.
Ans: b
131. Corioli's component of acceleration exists whenever a point moves along a path that has
(a) linear displacement
(b) rotational motion
(c) tangential acceleration
(d) centripetal acceleration
(e) none of the above.
Ans: b
132. The direction of Corioli's component of acceleration is the direction
(a) of relative velocity vector for the two coincident points rotated by 90° in the direction of the angular velocity of the rotation of the link
(b) along the centripetal acceleration
(c) along tangential acceleration
(d) along perpendicular to angular velocity
(e) none of the above.
Ans: a
133. In a shape mechanism, the Corioli's component of acceleration will
(a) not exist
(b) exist
(c) depend on position of crank
(d) unpredictable
(e) none of the above.
Ans: b
134. The magnitude of tangential acceleration is equal to
(a) velocity2 x crank radius
(b) velocity vcrankradius
(c) (velocity/crankradius)
(d) velocity x crank radius2
(e) none of the above.
Ans: b
135. Tangential acceleration direction is
(a) along the angular velocity
(b) opposite to angular velocity
(c) may be any one of these
(d) perpendicular to angular velocity
(e) none of the above.
Ans: c
Read More Questions:
Theory of Machines - Mechanical Engineering Part1
Theory of Machines - Mechanical Engineering Part2
