Top 550+ Solved Machine Design MCQ Questions Answer
Q. Induction hardening of components in done
a. To increase hardness at the centre
b. To increase the hardness of the core
c. To increase hardness on the surface only
d. To increase hardness uniformly
e. To increase hardness at a spot only
Q. ERW pipes are
a. Elastic reinforced wire
b. Extra reinforcement welded
c. Electrically resistance welded
d. Electrically reinforced and welded
e. None of the above
Q. A shaft subjected to combined bending and torsion can be designed by the following stress theory
a. Maximum shear stress theory
b. Maximum octahedral stress theory
c. Maximum energy theory
d. Maximum normal stress theory
e. Increasing the diameter of threaded portion
Q. A muff type coupling
a. Is a simple type rigid coupling
b. Is a simple type of flexible coupling
c. Is used for coplanar shafts
d. Is used for non-coplanar shafts
e. Non of the above
Q. In case of a beam at the neutral axis.
a. shear stress is zero and bending stress is maximum
b. shear stress is minimum and bending stress is zero
c. shear stress is minimum and bending stress is maximum
d. Increasing the diameter of threaded portion
e. shear stress is maximum and bending stress is minimum
Q. The column bases are mainly subjected to and designed for
a. bearing and tension
b. compression and tension
c. Increasing the diameter of threaded portion
d. bending and compression
e. bearing and compression
Q. Rivets are driven in
a. Either hot or cold condition
b. Hot condition
c. Cold condition
d. Increasing the diameter of threaded portion
Q. A single ply leather belt running at a belt velocity of 300 ft/min is likely to transmit per inch of width
a. 4.0 HP
b. 1.5 HP
c. 6.0 HP
d. 3.0 HP
e. 5.0 HP
Q. The cam angle is
a. The angle subtended by the live portion of the cam for a definite displacement of the follower
b. The angle subtended by live portion of the cam at the cam centre
c. The angle subtended at the cam centre by the protion of the cam during which the follower moves
d. The angle subtended by the cam at the cam centre when the follower dwells
e. None of the above
Q. In case the number of plastic hinges at failure is less than (r+1), where r is the degree of redundancy of the structure then the type of collapse of structure is
a. elastic collapse
b. complete collapse
c. Increasing the diameter of threaded portion
d. partial collapse
e. over complete collapse
Q. A bench vice is provided with
a. Vee threads
b. BSW threads
c. Buttress threads
d. Acme threads
e. None of the above
Q. The web crippling and web buckling may be prevented by
a. increasing the thickness of web and reducing the length of bearing plates
b. reducing the thickness of web as well as the length of bearing plates
c. increasing the thickness of web as well as the length of bearing plates
d. reducing the thickness of web and increasing the length of bearing plates
e. Increasing the diameter of threaded portion
Q. The ratio of the plastic moment capacity to the yeld moment capacity of a rectangular section is
a. 1.25
b. 1.85
c. 1.5
d. Increasing the diameter of threaded portion
e. 1.15
Q. The coefficient of friction will be least in case of
a. Leather on metal
b. Asbestos on metal in oil
c. Metal on metal
d. Wood on metal
e. Sintered metal on cast iron in oil