1) In S.H.M., acceleration is proportional to _________________? a. velocity b. displacement c. rate of change of velocity d. all of the above e. none of the above
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2) Inertia force acts___________________? a. perpendicular to the accel< force b. along the direction of accel* force c. opposite to the direction of ace ing force d. in any direction w.r.t. accel* force depending on the magnit two e. none of the above
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3) In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The distance between fixed pivots of crank and followers is________________________? a. 95 mm b. slightly less than 95 mm c. slightly more than 95 mm d. 45 mm e. none of the above
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4) Kinematic pairs are those which have___________________? a. two elements held together mechani-cally b. two elements having relative motion c. two elements having Coroili’s com-ponent d. minimum of two instantaneous centres e. all of the above
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5) In a darg link quick return mechanism, the shortest link is always fixed. The sum of the shortest and longest link is _______________? a. equal to sum of other two b. greater than sum of other two c. less than sum of other two d. there is no such relationship e. none of the above
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6) In a mechanism, usually one link is fixed. If the fixed link is changed in a kinematic chain, then relative motion of other links_________________? a. will remain same b. will change c. could change or remain unaltered depending oh which link is fixed d. will not occur e. none of the above
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7) In its simplest form, a cam mechanism consists of following number of links___________________? a. 1 b. 2 c. 3 d. 4 e. none
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8) An eccentric sheave pivoted at one point rotates and transmits oscillatory motion to a link whose one end is pivoted and other end is connected to it. This mechanism has___________________? a. 2 links b. 3 links c. 4 links d. 5 links e. none of the above
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9) The main disadvantage of the sliding pair is that it is_________________? a. bulky b. wears rapidly c. difficult to manufacture d. A. and B. above e. A. and C. above
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10) Hart mechanism has________________? a. eight links b. six links c. four links d. twelve links e. five links
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11) “Open pairs are those which have__________________? a. point or line contact between the two elements when in motion b. surface contact between the two ele-ments when in motion c. elements of pairs not held together mechanically d. two elements that permit relative motion e. none of the above
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12) A cam with a roller follower would con stitute following type of pair______________? a. lower pair b. higher pair c. open pair d. close pair e. cam pair
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13) Higher pairs are those which have_________________? a. point or line contact between the two elements when in motion b. surface contact between the two ele-ments when in motion c. elements of pairs not held together mechanically d. two elements that permit relative motion e. none of the above
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