Top 550+ Solved Machine Design MCQ Questions Answer
Q. Dead weight type safety valve is not used on locomotives because
a. It is costly
b. It is susceptible to vibratory forces
c. It is not reliable
d. It is bulky
e. It gives bad apparatus
Q. Extrafine threaded connections are generally recommended for
a. Increasing the diameter of threaded portion
b. Rolled sections
c. hardened objects
d. thin walled assemblies
e. Tapped hole in castings
Q. A square key is
a. Equally strong in shear and compression
b. Very weak in shear
c. Less strong in shear and more strong in compression
d. More strong in shear and less strong in compression
e. Very weak in compression
Q. A steel specified as St 50 will have a tensile strength of approximately
a. 50 tonnes/m2
b. 50 kg/mm2
c. 50 kg/cm2
d. 50 tonnes/mm2
e. None of the above
Q. The chain used in motor cycles is generally
a. Ewast type
b. Silent type
c. Double roller type
d. Bush roller type
e. Pintle type
Q. In gear design, addendum is equal to
a. Cast steel
b. Twice of module
c. One and a half times module
d. Module
e. Half of module
Q. Lubricant is not required in
a. Increasing the diameter of threaded portion
b. Electromagnetic bearing
c. Hydrostatic bearings
d. Gas bearings
e. Foil bearing
Q. A connecting rod in an IC Engine is to be designed against buckling. The end conditions considered are
a. Both the ends fixed
b. Both the ends are free
c. Both the ends are hinged
d. none of the above
e. Cast steel
Q. A ball bearing cannot be provided for
a. Big ends of connecting rods for I.C. engines
b. Variable load shafts
c. Variable speed shafts
d. Automobile gear shafts
e. Low speed shafts
Q. Which of the following drive has accurate speed ratio?
a. Flat cross-belt drive
b. Timing belt drive
c. V-belt 'C' section drive
d. V-belt 'B' section drive
e. Increasing the diameter of threaded portion
Q. Under which condition a material ordinatily said to be ductile undergoes a fracture similar to that of a brittle material
a. Cyclic loading at normal temperature
b. Long time static loading at elevated temperature
c. Impact loading specially at low temperatures
d. All of the above
e. None of the above
Q. When minimum axial thrust is the criteria, the choice of gears would been
a. Helical gears
b. Hypoid gears
c. Herringbone gears
d. Worm gears
e. None of the above
Q. If during operation a boiler bursts, the matter should be reported to
a. State Government
b. Management
c. Central Government
d. Boiler inspector
e. Police
Q. The compression members tend to buckle in the direction of
a. Axis of load
b. Perpendicular to the axis of load
c. Minimum cross-section
d. Least radius of gyration
e. None of the above