Top 550+ Solved Machine Design MCQ Questions Answer
Q. In plastic analysis, the shape factor of a triangular section is
a. 1.15
b. Increasing the diameter of threaded portion
c. 2.34
d. 1.5
e. 1.85
Q. In case of quadruple riveted butt joints the joint efficiency is usually assumed in the range
a. 40-50%
b. 50-60%
c. 85-95%
d. 75-85%
e. 60-75%
Q. A V-belt having B section is generally used when the power to be transmitted is in the range
a. 25-35 HP
b. 35-50 HP
c. 50-75 HP
d. 75-100 HP
e. 3-25 HP
Q. In which of the following gears the lowest degree of accuracy can be expected
a. Machine tools
b. Aeroplane gears
c. Farm machinery
d. Automobile gears
e. Reduction gears for turbines
Q. Induction motors are generally provided with
a. Mitchel's thrust bearings
b. Sleeve bearings
c. Ball or roller bearings
d. Magnetic bearings
e. Bush bearings
Q. Which of the following gears are free from axial thrust?
a. Worm gears
b. Spiral gears
c. Helical gears
d. Bevel gears
e. Herringbone gears
Q. The phenomenon of eloggation and contraction of the belt is known as
a. Plasticity
b. Creep
c. Fatigue
d. Elasticity
e. Slip
Q. Rankine theory is applied to
a. bruite materials
b. Increasing the diameter of threaded portion
c. plastic materials
d. tough materials
e. ductile materials
Q. The clamping nut of the turn buckle has
a. Left hand threads
b. Right hand threads
c. Right hand threads on one side and left hand threads on the other side
d. Has no threads
e. None of the above
Q. Helical springs are not subjected to
a. Torsional shear stress
b. Transverse shear stress
c. Deflection
d. Hoop stress
e. Force
Q. The uniform rate of descent is maintained by a brake on the drum which applies the necessary torque of 300 kg-m what additional brake torque is required to bring the system to rest in 0.50 second?
a. 6235 N-m
b. 1027 N-m
c. 2054 N-m
d. 1580 N-m
e. Increasing the diameter of threaded portion
Q. The part of the tooth which lies between the pitch and dedendum circle is known as
a. Base
b. Face
c. Profile
d. Root
e. Flank
Q. Total strain energy theory for the failure of a material at elastic limit is also known as
a. Increasing the diameter of threaded portion
b. Von mises theory
c. Rankine's theory
d. Haig's theory
e. Gust's or Treasca's theory
Q. A solid shaft of 100 mm diameter transmits 100 HP at (450/?) r.p.m. The torque in kg-m on the shaft would be
a. 250
b. 375
c. 500
d. 990
e. 750
Q. Stone crusher rolls are generally made of
a. Mild steel
b. Grey iron
c. Cast iron
d. Cast steel
e. High carbon steel