131. The width of the pulley should be __________ width of the belt.
equal to
less than
greater than
✅ The correct answer is option C.
Machine Design MCQs
132. When a load W is suddenly applied to a bar of weight W1, the stress induced in the bar will increase with the increase in weight W1.
Correct
Incorrect
✅ The correct answer is option B.
133. The value of Lewis form factor used in design of gears is
dependent on number of teeth of a gear
dependent on system of teeth
independent of size of teeth
all of these
✅ The correct answer is option D.
134. When plates are fastened by a rivet, the holes in the plates should be made by punching and reaming.
Correct
Incorrect
✅ The correct answer is option B.
135. The radial distance from the top of a tooth to the bottom of a tooth is called clearance
TRUE
FALSE
✅ The correct answer is option A.
136. The dedendum circle diameter is equal to (where φ = Pressure angle)
pitch circle diameter x cos φ
addendum circle diameter x cos φ
clearance circle diameter x cos φ
pitch circle diameter
✅ The correct answer is option A.
137. In worm, gears, pitch lead angle is
half the angle between two inclined faces in axial plane
the angle between the tangent to the pitch helix and the plane of rotation
the angle between the tangent to the pitch helix and an element of the cylinder
none of the above
✅ The correct answer is option B.
139. Stress concentration factor is defined as the ratio of
maximum stress to the endurance limit
nominal stress to the enurance limit
maximum stress to the nominal stress
nominal stress to the
✅ The correct answer is option C.
140. The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to
static load
dynamic load
static as well as dynamic load
completely reversed lo
✅ The correct answer is option D.