Theory of Machines MCQ Questions
1- Which of the following is not the higher pair?
(A) Nut and bolt
(B) Ball bearing
(C) Cylinder rolling on a surface
(D) Sphere rolling on a surface
2- For a four bar linkage in toggle position, the value of the mechanical advantage is
(A) 0.5
(B) 1.0
(C) 2.0
(D) Infinity
3- If four links are connected at a joint, it may be treated as:
(A) Four binary joint
(B) Three binary joint
(C) Two binary joint
(D) One binary joint
4- A planar mechanism has 8 links and 10 rotary joints. The number of degrees of freedom of the mechanism, using Gruebler’s criterion, is
(A) 0
(B) 1
(C) 2
(D) 3
5- Klein’s diagram is used to find
(A) Velocity of a part
(B) Acceleration of a part
(C) Velocity and acceleration of various parts
(D) None of the above
6- Pulley in belt drive acts as
(A) sliding pair
(B) rolling pair
(C) surface pair
(D) cylindrical pair
7- Ackermann steering gear consist of
(A) sliding pair
(B) lower pair
(C) turning pair
(D) cylindrical pair
8- In elliptical trammels
(A) One turning pair and three sliding pair
(B) one sliding pair and three turning pair
(C) two turning pairs and two sliding pairs
(D) all four pairs are sliding
9- The total number of instantaneous centres for a mechanism having ‘n’ links, is
(A) n/2
(B) n-1
(C) n
(D) n(n-1)/2
10- Which of the following is not the shape of cam?
(A) spherical
(B) spiral
(C) cycloidal
(D) knife edge
11- Which of the following gears are used between parallel shafts?
(A) Herringbone gears
(B) Spiral bevel gears
(C) Straight bevel gears
(D) Worm and worm gear
12- Circular pitch is equal to (d = pitch diameter, T = number of teeth)
(A) Tooth thickness x width of space
(B) Addendum – Dedendum
(C) Addendum + Dedendum
(D) πd/T
13- In an involute gear, the normal to the involute is tangent to the
(A) Dedendum circle
(B) Addendum circle
(C) Pitch circle
(D) Base circle
14- In simple harmonic motion, acceleration is proportional to
(A) rate of change of velocity
(B) velocity
(C) displacement
(D) frequency
15- The surface of the gear tooth below the pitch surface is called
(A) Tooth depth
(B) Bottom tooth
(C) Flank
(D) Face
16- Sensitiveness of the governor is defined as
(A) Mean speed x range of speed
(B) Mean speed / Range of speed
(C) Range of speed / Mean speed
(D) None of the above
17- The height of Watt’s governor is proportional to
(Where ‘N’ is the speed of governor)
(A) N
(B) 1/N
(C) N2
(D) 1/N2
18- Following is of positive type clutch
(A) Jaw
(B) Cone
(C) Disc
(D) Hydraulic
19- The propeller of an aeroplane is rotating in the clockwise direction when viewed from the rear end. If the plane takes left turn the gyroscopic effect causes the
(A) plane to take right turn
(B) nose of the plane to move downwards and tail of the plane to raise
(C) nose of the plane to raise and tail of the plane to move downward
(D) no effect on the nose and tail of the plane
20- For self-locking of the screw, which of the following is correct?
(A) Coefficient of friction ˂ tangent of helix angle
(B) Coefficient of friction ˃ tangent of helix angle
(C) Tangent of helix angle is zero
(D) None of the above
ANSWERS:
1-(A), 2-(D), 3-(B), 4-(B), 5-(C), 6-(B), 7-(C), 8-(C), 9-(D), 10-(D), 11-(A), 12-(D), 13-(D), 14-(C), 15-(C), 16-(C), 17-(D), 18-(A), 19-(C), 20-(B)