Top 550+ Solved Machine Design MCQ Questions Answer
Q. For a parallel load on a fillet weld of equal leg the plane of maximum shear occurs
a. Almost vertically
b. Almost horizontallly
c. At 45? to the horizontal
d. At 30? to the vertical
e. At 30? to the horizontal
Q. Which of the following types of gears are free from interference?
a. Cycloidal
b. Epicycloidal
c. Involute
d. Stub
e. Hypocycloidal
Q. A section is subjected to reversal of stresses. Choice exists for selecting any of the following section. Which one should be selected?
a. T-section
b. Unequal angle iron
c. Channel section
d. Hollow pipe
e. Equal angle iron
Q. For the plastic analysis, the criterion for the analysis of a structure is based upon
a. yield load
b. Increasing the diameter of threaded portion
c. ultimate load
d. working load
e. breaking load
Q. Belt slip may occur due to
a. None of above
b. Any of above
c. Loose belt
d. Heavy load
e. Driving pulley too small
Q. The plastic hinge in a section is caused when
a. all the fibres at a section reach the yield state
b. the material at a section reaches plastic state
c. the extreme fibres at a section reach the yield state
d. none of the above
e. Increasing the diameter of threaded portion
Q. The thickness of a gear tooth is measured
a. Along the pitch circle
b. Along the root circle
c. Along the outer circle
d. Average of the profile
e. None of the above
Q. The life of a ball bearing is usually given in
a. hours of service
b. total rpm
c. either of (A) or (B) above
d. none of the above
e. Increasing the diameter of threaded portion
Q. In bolts the stress in the unthreaded area (the shank) is
a. lower
b. lower higher
c. higher
d. Increasing the diameter of threaded portion
e. higher or lower
Q. Life of a rolling bearing as listed in a catalogue is usually
a. minimum expected life
b. maximum expected life
c. mean life
d. none of the above
e. Increasing the diameter of threaded portion
Q. For the same power transmission, V-belts are
a. wider, thinner
b. thinner, wider
c. Increasing the diameter of threaded portion
d. narrow, thicker
e. thicker, narrow
Q. Which of the following alloying metal for steels acts as a deoxidizing and desulphurising agent?
a. Nickel
b. Increasing the diameter of threaded portion
c. Chromium
d. Tungsten
e. Manganese
Q. The coefficient of friction in a rolling bearing is of the order of
a. 0.01
b. 0.1
c. 0.2
d. 0.05
e. 0.001