# Engineering Mechanics Test Exam – Set 06 :: Mechanical Engineering

Are you guys looking for Mechanical Engineering MCQ Questions with Answers PDF Free Download as per Mechanical Engineering new exam pattern? You came to the right page. This may assist you to understand and check your knowledge about the Subjects. Students also can take a free test of the Multiple Choice Questions of Mechanical Engineering. Each question has four options followed by the right answer. These Mechanical Engineering MCQ Questions are selected supported by the newest exam pattern.

## Q1. A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if

(A) The floor is smooth, the wall is rough
(B) The floor is rough, the wall is smooth
(C) The floor and wall both are smooth surfaces
(D) The floor and wall both are rough surfaces

Answer: (C) The floor and wall both are smooth surfaces

## Q2. The ratio of static friction to dynamic friction is always

(A) Equal to one
(B) Less than one
(C) Greater than one
(D) None of these

## Q3. Angle of friction is the

(A) Angle between normal reaction and the resultant of normal reaction and the limiting friction
(B) Ratio of limiting friction and normal reaction
(C) The ratio of minimum friction force to the friction force acting when the body is just about to move
(D) The ratio of minimum friction force to friction force acting when the body is in motion

Answer: (A) Angle between normal reaction and the resultant of normal reaction and the limiting friction

## Q4. According to Newton’s first law of motion,

(A) Everybody continues in its state of rest or of uniform motion, in a straight line, unless it is acted upon by some external force
(B) The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction, in which the force acts
(C) To every action, there is always an equal and opposite reaction
(D) None of the above

Answer: (A) Everybody continues in its state of rest or of uniform motion, in a straight line, unless it is acted upon by some external force

## Q5. Limiting force of friction is the

(A) Tangent of angle between normal reaction and the resultant of normal reaction and limiting friction
(B) Ratio of limiting friction and normal reaction
(C) The friction force acting when the body is just about to move
(D) The friction force acting when the body is in motion

Answer: (C) The friction force acting when the body is just about to move

(A) Nine times
(B) Six times
(C) Four times
(D) Two times

## Q7. Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction

(A) Along the plane
(B) Horizontally
(C) Vertically
(D) At an angle equal to the angle of friction to the inclined plane

Answer: (D) At an angle equal to the angle of friction to the inclined plane

(A) mv2
(B) mgv2
(C) 0.5 mv2
(D) 0.5 mgv2

(A) D + d
(B) D – d
(C) D × d
(D) D / d

## Q10. When a person, on a bicycle, drives round a curve, he has to lean __ to maintain equilibrium.

(A) Inward
(B) Outward
(C) Towards front
(D) Towards back

(A) 1 m
(B) 2 m
(C) 3 m
(D) 4 m

## Q12. The skidding away of the vehicle on a level circular path can be avoided if the force of friction between the wheels and the ground is __ the centrifugal force.

(A) Less than
(B) Greater than
(C) Equal to
(D) None of these

## Q13. Which is the correct statement about law of polygon of forces?

(A) If any number of forces acting at a point can be represented by the sides of a polygon taken in order, then the forces are in equilibrium
(B) If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium
(C) If a polygon representing forces acting at a point is closed then forces are in equilibrium
(D) If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium

Answer: (D) If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium

## Q14. Moment of inertia of a hollow circular section, as shown in the below figure about an axis perpendicular to the section, is __ than that about X-X axis.

(A) Two times
(B) Same
(C) Half
(D) None of these

(A) Weight
(B) Velocity
(C) Acceleration
(D) Force

## Q16. A spherical body is symmetrical about its perpendicular axis. According to Routh’s rule, the moment of inertia of a body about an axis passing through its centre of gravity is (where, M = Mass of the body, and S = Sum of the squares of the two semi-axes.)

(A) MS/3
(B) MS/4
(C) MS/5
(D) None of these

(A) 2.5 cm
(B) 3.0 cm
(C) 4.0 cm
(D) 5.0 cm

## Q18. The law of motion involved in the recoil of gun is

(A) Newton’s first law of motion
(B) Newton’s second law of motion
(C) Newton’s third law of motion
(D) None of these

Answer: (C) Newton’s third law of motion

(A) Same
(B) Double
(C) Half
(D) Four times