Objective Questions and Answer: Mechanics & Strength of Materials 13

Subject: Mechanics & Strength of Materials 13

**Part 13: Objective questions and answers of Mechanics & Strength Of Materials**

**Q1. A continuous beam is one which is**

a) fixed at both ends

b) Supported on more than two supports

c) supported at its ends

d) extending beyond the supports

**Q2. A concentrated load is one which**

a) acts at a point on a beam

b) spreads non-uniformly over the whole length of a beam

c) spreads uniformly over the whole length of a beam

d) varies uniformly over the whole length of a beam

**Q3. The bending moment on a section is maximum where shear force is**

a) minimum

b) maximum

c) changing sign

d) zero

**Q4. When a load on the free end of a cantilever beam is increased, failure will occur**

a) at the free end

b) at the fixed end

c) in the middle of the beam

d) at a distance 2l/3 from free end

**Q5. the bending moment at the free end of a cantilever beam is**

a) zero

b) minimum

c) maximum

d) none of the above

**Q6. the shear force diagram of a cantilever beam of length l and carrying a uniformly**

**distributed load of w per unit length will be**

a) a right angled triangle

b) an isosceles triangle

c) an equilateral triangle

d) a rectangle

**Q7. The shear force and bending moment are zero at the free end of a cantilever beam, if it carries a**

a) point load at the free end

b) point load at the middle of its length

c) uniformly distributed load over the whole length

d) none of the above

**Q8. The shear force diagram for a cantilever beam of length l and carrying a gradually varying load from zero at free end and w per unit length at the fixed end is a**

a) horizontal straight line

b) vertical straight line

c) inclined line

d) parabolic curve

**Q9. The bending moment diagram for a simply supported beam loaded in its centre is**

a) a right angled triangle

b) an isosceles triangle

c) an equilateral triangle

d) a rectangle

**Q10. The shear force diagram for a simply supported beam carrying a uniformly distributed**

**load of w per unit length, consists of**

a) one right angled triangle

b) two right angled triangles

c) one equilateral triangle

d) two equilateral triangles

**Q11. The bending moment diagram for a simply supported beam carrying a uniformly distributed load of w per unit length, will be**

a) a horizontal line

b) a vertical line

c) an inclined line

d) a parabolic curve

**Q12. The point of contra flexure is a point where**

a) shear force changes sign

b) bending moment changes sign

c) shear force is maximum

d) bending moment is maximum

**Q13. When shear force at a point is zero, then bending moment is ______ at that point.**

a) zero

b) minimum

c) maximum

d) infinity

**Q14. In a simply supported beam carrying a uniformly distributed load w per unit length, the point of contraflexture**

a) lies in the centre of the beam

b) lies at the ends of the beam

c) depends upon the length of beam

d) does not exists

**Q15. when there is a sudden increase or decrease in shear force diagram between any two points, it indicates that there is a**

a) point load at the two points

b) no loading between the two points

c) uniformly distributed load between the two points

d) uniformly varying load between the two points

**Q16. When the shear force diagram is a parabolic curve between two points, it indicates that there is a**

a) point load at the two points

b) no loading between the two points

c) uniformly distributed load between the two points

d) uniformly varying load between the two points

**Q17. In a beam where shear force changes sign, the bending moment will be**

a) zero

b) minimum

c) maximum

d) infinity

**Q18. The point of contra flexure occurs in**

a) cantilever beams

b) simply supported beams

c) overhanging beam

d) fixed beams

**Q19. The bending moment at a section tends to bend or deflect the beam and the internal stresses resist its bending. The resistance offered by the internal stresses, to the bending, is called**

a) compressive stress

b) shear stress

c) bending stress

d) elastic modulus

**Q20. The assumption, generally, made in the theory of simple bending is that**

a) the beam material is perfectly homogenous and isotropic

b) the beam material is stressed within its elastic limit

c) the plane sections before bending remain plane after bending

d) all of the above

**Part 13: Objective questions and answers of Mechanics & Strength Of Materials**

Q1. Answer b

Q2. Answer a

Q3. Answer c

Q4. Answer b

Q5. Answer a

Q6. Answer a

Q7. Answer c

Q8. Answer d

Q9. Answer b

Q10. Answer b

Q11. Answer d

Q12. Answer b

Q13. Answer c

Q14. Answer d

Q15. Answer a

Q16. Answer d

Q17. Answer c

Q18. Answer c

Q19. Answer c

Q20. Answer d