Theory of Machines Test Questions - Set 13

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
Answer  Explanation 

ANSWER: displacement

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: opposite to the direction of ace ing force

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: slightly less than 95 mm

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: two elements having relative motion

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: less than sum of other two

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: will remain same

Explanation:
No explanation is available for this question!


7)   In its simplest form, a cam mechanism consists of following number of links___________________?

a. 1
b. 2
c. 3
d. 4
e. none
Answer  Explanation 

ANSWER: 3

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: 4 links

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: A. and B. above

Explanation:
No explanation is available for this question!


10)   Hart mechanism has________________?

a. eight links
b. six links
c. four links
d. twelve links
e. five links
Answer  Explanation 

ANSWER: six links

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: elements of pairs not held together mechanically

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: higher pair

Explanation:
No explanation is available for this question!


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
Answer  Explanation 

ANSWER: point or line contact between the two elements when in motion

Explanation:
No explanation is available for this question!