Deck 6: Bending Moment and Shear Force Diagrams for Beams

Question 1

SI units of Bending moment is

A)kN
B)kN²
C)kN^m
D)km

Answer 1

kN^m

Question 2

What is the other name for a positive bending moment?

A)Hogging
B)Sagging
C)Inflation
D)Contra flexure

Answer 2

Sagging

Question 3

For any part of the beam, between two concentrated load Shear force diagram is a

A)Horizontal straight line
B)Vertical straight line
C)Line inclined to x-axis
D)Parabola

Answer 3

Horizontal straight line

Question 4

For any part of a beam subjected to uniformly distributed load, bending moment diagram is

A)Horizontal straight line
B)Vertical straight line
C)Line inclined to x-axis
D)Parabola

Question 5

A sudden jump anywhere on the Bending moment diagram of a beam is caused by

A)Couple acting at that point
B)Couple acting at some other point
C)Concentrated load at the point
D)Uniformly distributed load or Uniformly varying load on the beam

Question 6

The diagram shown below, depicts bending diagram for

A)cantilever beam with uniformly distributed load
B)cantilever beam with uniformly distributed load only on half side of the beam
C)simply supported beam with varying distributed load
D)simply supported beam with uniformly distributed load

Question 7

A 10 m long cantilever beam is fixed at point B. What is the bending moment at point B, if 5 m span of AC carries uniform distributed load of 10 kN/m

A)125 kN/m
B)200 kN/m
C)375 kN/m
D)500 kN/m

Question 8

What is the maximum shear force acting on the beam shown below.

A)125 N
B)200 N
C)4000 N
D)8000 N

Question 9

At a point in a simply supported or overhanging beam where Shear force changes sign and Bending moment is

A)Maximum
B)Zero
C)Either increasing or decreasing
D)Infinity

Question 10

The beam having one end free and one end fixed is called as

A)Cantilever beam
B)Continuous beam
C)Overhang beam
D)Simply supported beam

Question 11

Uniformly varying load between two sections in shear force diagram is represented by

A)cubic curve
B)inclined line
C)horizontal line
D)parabolic curve

Question 12

In bending moment diagram, if no load acts between two sections, then it is represented by

A)horizontal line
B)inclined line
C)vertical line
D)all of the above

Question 13

What is the maximum bending moment acting on simply supported beam shown below?

A)2000 Nm
B)3000 Nm
C)4000 Nm
D)6000 Nm

Question 14

A beam is said to be of uniform strength, if

A)B.M. is same throughout the beam
B)Shear stress is the same through the beam
C)Deflection is the same throughout the beam
D)Bending stress is the same at every section along its longitudinal axis

Question 15

What is the product of sectional modulus and allowable bending stress called as?

A)Moment of inertia
B)Moment of rigidity
C)Moment of resistance
D)Radius of gyration

Question 16

A uniformly distributed load of 20 kN/m acts on a simply supported beam of rectangular cross section of width 20 mm and depth 60 mm. What is the maximum bending stress acting on the beam of 5m?

A)5030 Mpa
B)5208 Mpa
C)6600 Mpa
D)Insufficient data

Question 17

Neutral axis of a beam always coincides with

A)Axis passing through bottom of beam
B)Axis passing through height h/2 from bottom
C)Axis passing through height h/3 from bottom
D)Axis passing through centroid

Question 18

Net force acting on the cross section of beam in bending is

A)Tensile
B)Compressive
C)Zero
D)None

Question 19

Net force acting on the cross section of beam in bending is

A)Tensile
B)Compressive
C)Shear
D)None

Question 20

Which is more stronger in bending equal area square or circular beam

A)Square beam
B)Circular beam
C)Both are equally strong
D)None

Question 21

Why is a composite beam is converted into a beam of one material

A)Bending equation is applicable to one material beam
B)Bending equation is applicable to one alloy beam
C)Bending equation is applicable to one metal beam
D)None

Question 22

Bending equation is applicable to a beam of

A)Heterogeneous material
B)Homogeneous material
C)Alloy
D)None

Question 23

In a composite beam bending, strain at the common interface will be

A)Equal
B)Unequal
C)Zero
D)None

Question 24

Brittle material beams need reinforcement on the

A)Tension side
B)Compression side
C)Shear side
D)None

Question 25

In bending, neutral axis always is

A)Perpendicular to the centroidal axis
B)Coincides with the centroidal axis
C)Parallel to the centroidal axis
D)None