121. Lewis equation in gears is used to find the
tensile stress in bending
shear stress
compressive stress in bending
fatigue stress
✅ The correct answer is option C.
Machine Design MCQs
122. The strength of a riveted joint is equal to
tearing strength of plate (Pt)
shearing strength of rivet (Ps)
crushing strength of rivet (Pc)
least value of Pt Ps a
✅ The correct answer is option D.
124. The velocity factor for precision metallic gears cut with high accuracy and operating at velocities upto 20 m/s is equal to
✅ The correct answer is option A.
125. The fatigue limit of a material is greatly decreased by poor surface conditions.
Agree
Disagree
✅ The correct answer is option A.
126. When the shaft rotates in anticlockwise direction at high speed in a bearing, it will
have contact at the bottom most of the bearing
move towards right of the bearing making metal to metal contact
move towards right of the bearing making no metal to metal contact
move towards left of t
✅ The correct answer is option C.
127. A locking device extensively used in marine type connecting rod ends is a
jam nut
castle nut
sawn nut
ring nut
✅ The correct answer is option D.
128. A feather key transmits a turning moment and permits axial movement also.
TRUE
FALSE
✅ The correct answer is option A.
129. The velocity factor for carefully cut gears operating at velocities upto __________ is equal to 4.5/4.5 + v.
10 m/s
12.5 m/s
15 m/s
20 m/s
✅ The correct answer is option B.
130. When a load W is applied suddenly on a bar of cross-sectional area A, the stress induced in the bar will be
✅ The correct answer is option C.