Theory of Machines objective questions with answers part5

Q1. The frequency of oscillation at compared to earth will be
(A) 1.6 times more
(B) 1.6 times less
(C) 2.44 times more
(D) 2.44 times less

Q2. In S.H.M., the velocity vector w.r.t. displacement vector
(A) leads by 90°
(B) lags by 90°
(C) leads by 180°
(D) are in phase

Q3. For simple harmonic motion of the of follower, a cosine curve represents
(A) displacement diagram
(B) velocity diagram
(C) acceleration diagram
(D) All of these

Q4. In S.H.M., acceleration is proportional to
(A) velocity
(B) displacement
(C) rate of change of velocity
(D) All of these

Q5. In above example, the minimum length of the coupler will be
(A) 45 mm
(B) slightly less than 45 mm
(C) slightly more than 45 mm
(D) 95 mm

Q6. 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

Q7. A typewriter mechanism has 7 number of binary joints, six links and none of higher pairs. The mechanism is
(A) kinematically sound
(B) not sound
(C) soundness would depend upon which link is kept fixed
(D) data is not sufficient to determine same

Q8. 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

Q9. The following is the inversion of slider crank chain mechanism
(A) Whitworth quick return mechanism
(B) hand pump
(C) oscillating cylinder engine
(D) All of these

Q10. 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

Q11. A kinematic chain requires at least
(A) 2 links and 3 turning pairs
(B) 3 links and 4 turning pairs
(C) 4 links and 4 turning pairs
(D) 5 links and 4 turning pairs

Q12. 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

Q13. Which of the following mechanisms produces mathematically an exact straight line motion
(A) Grasshopper mechanism
(B) Watt mechanism
(C) Peaucellier’s mechanism
(D) Tchabichiff mechanism

Q14. In its simplest form, a cam mechanism consists of following number of links
(A) 1
(B) 2
(C) 3
(D) 4

Q15. Whitworth quick return mechanism is obtained by inversion of
(A) slider crank mechanism
(B) kinematic chain
(C) five link mechanism
(D) roller cam mechanism

Q16. 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

Q17. For a kinematic chain to be considered as mechanism
(A) two links should be fixed
(B) one link should be fixed
(C) none of the links should be fixed
(D) there is no such criterion

Q18. The main disadvantage of the sliding pair is that it is
(A) bulky
(B) wears rapidly
(C) Both of these
(D) None of these

Q19. Hart mechanism has
(A) eight links
(B) six links
(C) four links
(D) twelve links

Q20. Peaucellier mechanism has
(A) eight links
(B) six links
(C) four links
(D) twelve links