Top 550+ Solved Machine Design MCQ Questions Answer
Q. Gears preferred for minimum axial thrust are
a. Helical gears
b. Worm gears
c. Hypoid gears
d. Herring bone gears
e. Any of the above
Q. In case of springs in order to achieve greater load carrying capacity when the outer diameter is limited
a. Square section is used
b. Elliptical section is used
c. Rectangular section is used
d. Concentric springs are used
e. None of the above
Q. In the Laminated springs, the flat plates of different lengths are provided for
a. Reducing deflection
b. Appearance
c. Economy
d. Equal distribution of stress
e. Reducing bulk
Q. The most common material for the balls and races of ball bearings is
a. High carbon steel
b. High speed steel
c. high chromium steel
d. none of the above
e. Cast steel
Q. A key seldom fails in
a. Increasing the diameter of threaded portion
b. tearing
c. shearing
d. crushing
Q. A suspended body is to be struck heavily without producing any reaction at the support. It should be hit at
a. Centre of spin
b. Centre of gravity
c. Metacentre
d. Centroid
e. Centre of percussion
Q. Beams composed of more than one material, regidly connected so as to behave as one piece are known as
a. determinate beams
b. inditerminate beams
c. Increasing the diameter of threaded portion
d. composite beams
e. compound beams
Q. Low pressure angle on gears is likely to result in
a. Weaker teeth
b. Abrasion
c. Wear
d. Pitting
e. Stronger teeth
Q. The holding power of a saddle key is due to
a. Torsion
b. Shear force
c. Compressive force
d. Friction force
e. Tensile force
Q. In order to minimise jerks, the type of cam used is
a. Cycloidal
b. Hyperbolic
c. S.H.M.
d. Cylindrical
e. Parabolic
Q. Which of the following bearing will have least coefficient of friction?
a. Cylindrical foller bearing
b. Tapered bearing
c. Single ball bearing
d. Thrust ball bearing
e. Self-aligning bearing
Q. Abrasion wear of gear tooth occurs due to
a. Poor lubrication
b. Fatigue
c. Presence of foreign particles
d. Excessive load
e. Any of the above
Q. A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw is called
a. castle nut
b. jam nut
c. sawn nut
d. ring nut
e. Increasing the diameter of threaded portion
Q. The angle through which a gear turns from the beginning of contact of a pair of teeth until the contact reaches the pitch point, is known as
a. Angle of approach
b. Angle of action
c. Angle of contact
d. Pressure angle
e. Approach angle