231. The diameter of the rivet hole is usually __________ the nominal diameter of the rivet.
equal to
less than
more than
✅ The correct answer is option C.
Machine Design MCQs
232. When the lubricant is forced between the journal and the bearing by external pressure, the bearing is called hydrostatic lubricated bearing.
Agree
Disagree
✅ The correct answer is option A.
233. When a bolt is subjected to an external load, the stress induced in the bolt will be
tensile stress
shear stress
combined tensile and shear stress
any one of these
✅ The correct answer is option D.
234. The helix angle for double helical gears may be made up to
45°
60°
75°
90°
✅ The correct answer is option A.
235. If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value?
Maximum principal stress theory
Maximum shear stress theory
Maximum strain energy theory
Maximum distortion ene
✅ The correct answer is option A.
236. The ends of the leaves of a semi-elliptical leaf spring are made triangular in order to
obtain variable moment of inertia (I) in each leaf
permit each leaf to act as a overhanging beam
have variable bending moment (M) in each leaf
make M/I constant thro
✅ The correct answer is option D.
237. In skew bevel gearing, the axes of shafts are
intersecting and the teeth are curved
non-intersecting and non-parallel and the teeth are curved
non-intersecting and non-parallel and the teeth are straight
none of the above
✅ The correct answer is option C.
238. According to Indian standards, total number of fundamental deviations are
10
15
20
25
✅ The correct answer is option D.
239. Two shafts of the same length and material are joined in series. If the ratio of their diameters is 2, then the ratio of their angles of twist will be
2
4
8
16
✅ The correct answer is option D.
240. Which of the following formula is used in designing a connecting rod ?
Euler’s formula
Rankine’s formula
Johnson’s straight line formula
Johnson’s parabolic fo
✅ The correct answer is option B.