151. The distribution of the forces along the length of key fitted in a shaft
varies linearly
is uniform throughout
varies exponentially, being more near the torque-input end
varies exponentially,
✅ The correct answer is option C.
Machine Design MCQs
152. According to maximum normal stress theory, the maximum normal stress in the shaft is
✅ The correct answer is option C.
153. For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be
4
6
8
10
✅ The correct answer is option C.
154. The steel pulleys are __________ in weight than cast iron pulleys of the same capacity.
heavier
lighter
✅ The correct answer is option B.
155. If b denotes the face width and L denotes the cone distance for a bevel gear, then the bevel factor is written as
b/L
b/2 L
1 – 2 b.L
1 – b/L
✅ The correct answer is option D.
156. A flange coupling is a type of rigid coupling.
Correct
Incorrect
✅ The correct answer is option A.
157. According to Indian standards, total number of tolerance grades are
8
12
18
20
✅ The correct answer is option C.
158. When spring index increases, the value of Wahl’s stress factor
increases linearly
decreases linearly
remains same
increases exponentiall
✅ The correct answer is option D.
159. The effect of key ways on a shaft is to reduce its load carrying capacity and to increase its torsional rigidity.
TRUE
FALSE
✅ The correct answer is option B.
160. A type of brake commonly used in motor cars is a
shoe brake
band and block brake
band brake
internal expanding bra
✅ The correct answer is option D.