Top 150+ Solved Design of Machine Elements MCQ Questions Answer
Q. In gas welding which of the following is generally used?
a. oxygen-hydrogen
b. oxygen-acetylene
c. oxygen-hydrogen or oxygen-acetylene
d. none of the mentioned
Q. Filler material is used in electric resistance welding.
a. yes
b. no filler material used
c. depends on the type of welding
d. none of the listed
Q. Which type of welding is generally used in automobile sector?
a. electric arc welding
b. electric resistance welding
c. gas welding
d. forge welding
Q. Hard peening is
a. hammering the weld across the length while the joint is hot
b. hammering the weld along the length while the joint is hot
c. hammering the weld along the length while the joint is cold
d. hammering the weld across the length while the joint is cold
Q. A rivet is specified as a 20mm rivet. What does it mean?
a. none of the mentioned
b. shank dia 20mm
c. head dia 20mm
d. both head and shank dia 20mm
Q. The amount by which the two rods to be joined are drawn together is called as?
a. draw
b. portray
c. lead
d. pitch
Q. Among punching and drilling, which is cheaper?
a. punching
b. drilling
c. equally expensive
d. cannot be determined
Q. In which of the following bonding theory, water molecules break down to form H+ and OH- ions?
a. electrostatic bonding theory
b. hot strength theory
c. surface tension theory
d. block and wedge theory
Q. What does the clay particle absorb in electrostatic bonding theory?
a. complete water
b. h+ ions
c. oh–ions
d. sand grains
Q. For bonding action of clays, what is the amount of water needed?
a. 1.5%-8%
b. 3.5%-11%
c. 4.5%-12%
d. 5.5%-13%