Top 550+ Solved Machine Design MCQ Questions Answer
Q. A reverted gear train is one in which
a. The direction of rotation of first and last gear is the same
b. The direction of rotation of first and last gear is opposite
c. The first and last gear are on the same shaft
d. The first and the last gear are essentially on separate but parallel shafts
e. None of the above
Q. In an extra humid atmosphere which one of the following motor would you select?
a. Semi-protected
b. Drip proof
c. Totally enclosed fan cooled
d. Open type
e. Fan cooled
Q. A Babbitt is
a. A eutcctic of iron and iron phosphide
b. A gadget for measuring volume
c. A measure of magnetic induction produced in a material
d. Antimony bearing lead or tia alloy
e. None of the above
Q. Fine scratches assist in librication in
a. thin film lubrication
b. thick film lubrication
c. both (A) and (B) above
d. none of the above
e. Increasing the diameter of threaded portion
Q. The ultimate strength design of steel structures makes use of
a. elastic and plastic analysis of structures
b. Increasing the diameter of threaded portion
c. plastic analysis of structures
d. ultimate analysis
e. elastic analysis of structures
Q. Which steel will have maximum percentage of carbon?
a. 20 Cr 18 Ni 2
b. 15 Cr 65
c. C 14
d. 40 Cr 40
e. C 15
Q. While designing a warm and a worm wheel the sign should be governed by
a. Worm
b. Worm wheel
c. Any one of the two
d. Standards designs should be followed
e. None of the above
Q. If the stress at elastic limit is Se, then the modulus of resistance is proportional to
a. (Se)
b. (Se)1/2
c. (Se)2
d. Se
e. (Se)2/2
Q. The gears used for non-intersecting perpendicular shafts are
a. Herringbone gears
b. Helical gears
c. Spur gears
d. Hypoid gears
e. Double helical gears
Q. Fine thread with 16 mm nominal diameter and 1.5 mm pitch is designed as
a. M 1.5 x 16
b. M 16 x 1.5
c. M 16
d. none of the above
e. Cast steel
Q. The resilience of a bolt may be increased by
a. Increasing the diameter of threaded portion
b. Providing an under cut
c. Increasing shank diameter
d. Increasing the size of head
e. Increasing its length
Q. Monel metal is
a. Copper-nickel alloy
b. Nickel-chromium alloy
c. Aluminium-copper alloy
d. Aluminium-silver alloy
e. Chromium-molybdenum alloy
Q. The cam follower generally used in automobiles is
a. Mushroom type
b. Flat type
c. Spherical type
d. Roller type
e. Knife edge type
Q. The value of Young's modulus of elasticity in ascending order for glass, lead, phosphor bronze, steel and wood is
a. Wood, glass, lead, phosphor bronze, steel
b. Wood, glass, phosphor bronze, lead steel
c. Wood, phosphor bronze, lead glass steel
d. Wood, lead, glass, phosphor bronze, steel
e. Wood, phosphor bronze, glass, lead, steel