71. If the helix angle of a helical gear is increased, the load carrying capacity of the tooth increases.
Correct
Incorrect
✅ The correct answer is option B.
Machine Design MCQs
72. When a shaft is subjected to combined twisting moment (T) and bending moment (M), then the equivalent bending moment is equal to
✅ The correct answer is option C.
73. In a flat belt drive, if the slip between the driver and belt is 1 %, between the belt and follower is 3% and driver and follower pulley diameters are equal, then velocity ratio of the drive will be
0.96
0.97
0.98
0.99
✅ The correct answer is option A.
74. In a boundary lubricated bearing, there is a __________ of lubricant between the journal and the bearing.
thick film
thin film
✅ The correct answer is option B.
75. In a V-belt drive, the belt makes contact at the bottom of the groove of the pulley.
Agree
Disagree
✅ The correct answer is option B.
76. The shear stress in a beam varies from zero at the outer fibres to a maximum at the neutral surface.
Yes
No
✅ The correct answer is option A.
77. A steel containing upto 0.15% carbon is known as
mild steel
dead mild steel
medium carbon steel
high carbon steel
✅ The correct answer is option B.
78. A riveted joint is a __________ fastening.
permanent
temporary
✅ The correct answer is option A.
79. The transverse fillet welded joints are designed for
tensile strength
compressive strength
bending strength
shear strength
✅ The correct answer is option A.
80. Which of the following is an antifriction bearing?
journal bearing
pedestal bearing
collar bearing
needle bearing
✅ The correct answer is option D.