Top 250+ Solved Theory of Machines MCQ Questions Answer
Q. Which is the false statement about a governor?
a. Isochronism in govrnors is desirable when approximately one constant speeds is desired to be kept for all loads
b. A very sensitive governor may not be very stable
c. A sensitive governor cannot be isochronous
d. Hunting in a governor may occur due to worn out guides of the sleeve
e. A stable governor has a fixed position of balls for each speed within the working range
Q. The angle of obliquity is kept small in order
a. To reduce force of friction
b. To minimise axial load
c. To minimise power loss in gearing
d. To avoid larger throusts
e. None of the above
Q. If there are L number of links in a mechanism, then the number of possible inversions would be
a. (L + 2)
b. (L + 3)
c. L/2
d. L
e. (L + 1)
Q. A mechanism is an assembly of
a. two links
b. three links
c. only four links
d. four or more than four links
e. None of the above
Q. A gear box in an automobile utilises
a. Simple gear train
b. Compound gear train
c. Epicyclic gear train
d. Compound-epicyclic gear train
e. None of the above
Q. In the coupling rod mechanism of a locomotive each of the four pairs is a
a. sliding pair
b. Rolling pair
c. screw pair
d. Turning pair
e. All of the above
Q. At critical speed
a. The shaforuns smoothly
b. The shaft runs with noise due to vibrations
c. The shaft becomes dynamically unstable with negligible lateral amplitudes
d. The shaft becomes dynamically unstable with large lateral amplitudes
e. None of the above
Q. When sunk key is to be used the key way is
a. Provided in shaft only
b. 36 Hz
c. Provided both in shaft and hub
d. Keyway is not provided for a sunk key
e. Provided in hub only
Q. Kinetic friction is
a. That which occurs when there is no motion
b. Less than maximum static friction
c. Is equal to the static friction
d. Is always more than peak static friction
e. That occurs on dry surfaces only
Q. Coriolis component of acceleration will exist only if
a. There are two coincidental points
b. Two coincident points have relative angular velocity of sliding
c. Two coincidental points have linear relative velocity of sliding accompanied by the rotation about fixed centres
d. The two coincidental points must have same centre of rotation
e. None of the above
Q. In a car, transmission losses will be minimum in
a. First gear
b. Direct gear
c. Second gear
d. Sperm
e. Third gear
Q. Cam size depends upon
a. Pitch cricle
b. Cam operating speed
c. Base circle
d. Outer circle
e. Prime circle
Q. In a car transmission losses will be least in which gear?
a. Direct gear
b. Third gear
c. Second gear
d. First gear
e. Sperm
Q. Klein's construction is used to determine
a. Displacement of various parts
b. Velocity of various parts
c. Acceleration of various parts
d. Angular acceleration of various parts
e. None of the above