# Engineering Mechanics MCQ Quiz – Set 10 :: Mechanical Engineering

Are you guys looking for Mechanical Engineering MCQ Questions with Answers PDF Free Download as per Mechanical Engineeringnew 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.

(A) kg m
(B) kcal
(C) Watt
(D) Watt hours

## Q2. Dynamic friction as compared to static friction is

(A) Same
(B) More
(C) Less
(D) May be less of more depending on nature of surfaces and velocity

## Q3. The coefficient of friction depends on

(A) Area of contact
(B) Shape of surfaces
(C) Strength of surfaces
(D) Nature of surface

(A) 5
(B) 10
(C) 20
(D) 40

## Q5. Moment of inertia of a hollow circular section, as shown in the below figure about X-axis, is

(A) π/16 (D² – d²)
(B) π/16 (D³ – d³)
(C) π/32 (D⁴ – d⁴)
(D) π/64 (D⁴ – d⁴)

Answer: (D) π/64 (D⁴ – d⁴)

## Q6. Work done is said to be zero, when

(A) Some force acts on a body, but displacement is zero
(B) No force acts on a body but some displacement takes place
(C) Either (A) or (B)
(D) None of the above

Answer: (C) Either (A) or (B)

(A) mr2/3
(B) 2mr2/3
(C) 2mr2/5
(D) 3mr2/5

## Q8. If ‘P’ is the force acting on the body, ‘m’ is the mass of the body and ‘a’ is the acceleration of the body, then according to Newton’s second law of motion,

(A) P + m.a = 0
(B) P – m.a = 0
(C) P × m.a = 0
(D) P/m.a = 0

Answer: (B) P – m.a = 0

## Q9. Two like parallel forces are acting at a distance of 24 mm apart and their resultant is 20 N. It the line of action of the resultant is 6 mm from any given force, the two forces are

(A) 15 N and 5 N
(B) 20 N and 5 N
(C) 15 N and 15 N
(D) None of these

Answer: (A) 15 N and 5 N

## Q10. During elastic impact, the relative velocity of the two bodies after impact is __ the relative velocity of the two bodies before impact.

(A) Equal to
(B) Equal and opposite to
(C) Less than
(D) Greater than

Answer: (B) Equal and opposite to

## Q11. In order to completely specify angular displacement by a vector, it must fix

(A) Direction of the axis of rotation
(B) Magnitude of angular displacement
(C) Sense of angular displacement
(D) All of these

(A) β/2
(B) 30° + β/2
(C) 45° + β/2
(D) 60° + β/2

(A) Same as
(B) Twice
(C) Thrice
(D) Four times

## Q14. In a framed structure, as shown in the below figure, the force in the member AB is __ the force in member AC.

(A) Half
(B) Equal to
(C) Double
(D) None of these

## Q15. A body will begin to move down an inclined plane if the angle of inclination of the plane is _ the angle of friction.

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

## Q16. The forces which do not meet at one point and their lines of action do not lie on the same plane are known as

(A) Coplanar concurrent forces
(B) Coplanar non-concurrent forces
(C) Non-coplanar concurrent forces
(D) None of these

## Q17. 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
(D) None of These

(A) 3mr2/5
(B) 3mr2/10
(C) 2mr2/5
(D) 4mr2/5

## Q19. If three forces acting in different planes can be represented by a triangle, these will be in

(A) Non-equilibrium
(B) Partial equilibrium
(C) Full equilibrium
(D) Unpredictable