Mechanical Engineering Basics Notes with Quiz

Q.The friction experienced by a body, when in motion, is known as
A. rolling friction
B. dynamic friction
C. limiting friction
D. static friction
Answer: Option B

Q.Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the ball with velocity v is made to struck the second ball. Both the balls after impact will move with a velocity
A. v
B. v/2
C. v/4
D. v/8
Answer: Option B

Q. The velocity ratio in case of an inclined plane inclined at angle θ to the horizontal and weight being pulled up the inclined plane by vertical effort is
A. sin θ
B. cos θ
C. tan θ
D. cosec θ
Answer: Option A

Q.The range of projectile on a downward inclined plane is __________ the range on upward inclined plane for the same velocity of projection and angle of projection.

A. less than
B. more than
C. equal to
Answer: Option B

Q.A body of weight W is required to move up on rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by(where μ = tanφ = Coefficient of friction between the plane and the body.)
A. P = W tanα
B. P = W tan(α + φ)
C. P = W (sinα + μcosα)
D. P = W (cosα + μsinα)
Answer: Option C

Q.If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is
A. 30°
B. 60°
C. 90°
D. 120°
Answer: Option D

Q.A smooth cylinder lying on its convex surface remains in __________ equilibrium.

A. stable
B. unstable
C. neutral
Answer: Option B

Q. Moment of inertia of a circular section about an axis perpendicular to the section is
A. πd^3/16
B. πd^3/32
C. πd^4/32
D. πd^4/64
Answer: Option C

Q.Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its C.G. and parallel to the base, is
A. bh^3/4
B. bh^3/8
C. bh3/12
D. bh^3/36
Answer: Option D

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