Top 250+ Solved Theory of Machines MCQ Questions Answer
Q. In order that a belt may not run off the pulley
a. It should be properly tightened
b. The centre line of the belt as it approaches the pulley must lie in a plane perpendicular to the axis of that pulley
c. The belt should be provided with frictional material
d. The belt should be provided with a guide
e. None of the above
Q. The gears are considered to be operating in medium velocity range if their peripheral velocity lies in the range
a. 25-50 m/sec
b. 3-15 m/sec
c. 15-25 m/sec
d. 1-3 m/sec
e. 50-75 m/sec
Q. Motor cycle shock sbsorbers are generally designed for
a. Resonant damping
b. Light damping
c. Large damping
d. Critical damping
e. Partial damping
Q. A point on a link connecting double slider crank chain, traces a
a. Circular path
b. Hoperbolic path
c. Straight line path
d. Parabolic path
e. Elliptical path
Q. Velocity of sliding between two mating gear surfaces can be defined as
a. Sum of their angular velocities x distance between pitch point and point of contact.
b. Sum of their angular velocities x distance between their centres of rotation.
c. Sum of their angular velocities x difference between their pitch circle diameters
d. None of these
e. None of the above
Q. Identify incorrect statement regarding the flywheel, if any
a. It is provided to minimise vibration of engine
b. It takes care of output fluctuations and controls input accordingly
c. It is provided to control engine speed
d. All above
e. In help in starting engine
Q. The number of natural frequencies for three rotor system will be
a. Six
b. Three
c. One
d. Four
e. Two
Q. In case of gears, the interference takes place
a. Whenever the forms of the mating teeth are such that contact between them can occur at some place other than along the correct path of contact
b. When gears do not move smoothly in absence of lubrication
c. When the pitch of the gears is not same
d. When the gear teeth are under cut
e. None of the above
Q. In case of solid friction, when tan ? =
a. The body A will move over the surface B irrespective of the magnitude of the force F applied on the body
b. tan ? can be equal to
c. tan ? can never be equal to
d. No motion of body A on surface B is possible, irrespective of how large the magnitude of force F applied on the body may be
e. tan ? can be equal to
Q. Which of the following is a dead weight type governor?
a. Porter governor
b. Hartnell governor
c. Watt governor
d. All of the above
e. None of the above
Q. Which of the following is not a positive drive?
a. Rope drive
b. Flat belt drive
c. V-belt drive
d. All of the above
e. None of the above
Q. In case of V-belts
a. Belts should not touch the bottom of groove in pulley
b. Belts should touch the bottom of groove in pulley
c. Grooves in pulley are generally wider than the belt
d. Tension in belt remains constant throughout
e. The efficiency of transmission is less
Q. According to the law of gearing
a. Clearance should be minimum 0.15 mm
b. Teeth should be cycloidal type
c. Common normal at the point of contact always passes through a fixed point (pitch point) on the line joining the centres of rotation
d. The gears whould be cut with the cutter having same module
e. Teeth should be involute type
Q. In a V-belt having B section may be used when the load to be transmitted is
a. 60-75 HP
b. 3 to 20 HP
c. 30-60 HP
d. 75-90 HP
e. 100 HP
Q. A slider crank chain consists of
a. One turning and two sliding pairs
b. Two turning and one sliding pair
c. Three turning and one sliding pairs
d. One turning and one sliding pair
e. Two turning and two aliding pairs