Question Bank of Strength of Material

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Question Bank of Strength of Material

SHEAR AND BENDING IN BEAMS

1. What is beam?

Beam is a structural member which is supported along the length and subjected to external loads acting transversely (i.e) perpendicular to the center line of the beam.

2. What is mean by transverse loading on beam?

If a load is acting on the beam which perpendicular to the central line of it then it is called transverse loading.

3. What is Cantilever beam?

A beam one end free and the other end is free is called cantilever beam.

4. What is simply supported beam?

A simply supported beam is one that rests on two supports and is free to move horizontally.

A beam supported or resting free on the support at its both ends.

5. What is mean by over hanging beam?

If one or both of the end portions are extended beyond the support then it is called over hanging beam.

6. What is mean by concentrated loads?

A load which is acting at a point is called point load.

7. What is uniformly distributed load.

A uniform distributed load is a force that is applied evenly over the distance of a support.

If a load which is spread over a beam in such a manner that rate of loading is uniform through out the length then it is called as uniformly distributed load.

8. Define point of contra flexure? In which beam it occurs?

A point of contra flexure is a point where Bending Moment Zero or Change sign Negative to Positive or Positive to Negative vice versa.
It occurs only in overhanging beam.

9. What is mean by positive or sagging BM?

Bending Moment is said to positive (sagging) if moment on left side of beam is clockwise or right side of the beam is counter clockwise.

10. What is mean by negative or hogging BM?

Bending Moment is said to negative (hogging) if moment on left side of beam is counter clockwise or right side of the beam is clockwise.

11. Define shear force and bending moment?

Shear Force at any cross section is defined as algebraic sum of all the forces acting either side of beam.
Bending Moment at any cross section is defined as algebraic sum of the moments of all the forces which are placed either side from that point.

12. When will bending moment is maximum?

Bending Moment will be maximum when shear force change its sign.

13. What is maximum bending moment in a simply supported beam of span (L) subjected to UDL of (w) over entire span?

wL2/8

14. In a simply supported beam how will you locate point of maximum bending moment?

The bending moment (BM) is maximum and where Shear Force (SF) is zero.
Write Shear Force equation at that point and equating to zero we can find out the distances 'x' from one end then find maximum bending moment at that point by taking all moment on right or left hand side of beam.

15. What is shear force?