Deck 2: Columns, Beams and Shear Force Diagrams

Question 1

Columns of given length, cross-section and material have different values of buckling loads for different end conditions. The strongest column is one whose

A)one end is fixed and other end is hinged
B)both ends are hinged or pin jointed
C)one end is fixed and the other end entirely free
D)both the ends are fixed

Answer 1

both the ends are fixed

Question 2

The slenderness ratio of a vertical column of square cross- section of 10 cm side and 500 cm long, is

A)117.2
B)17.3
C)173.2
D)137.2

Answer 2

173.2

Question 3

The equivalent length of a column fixed at one end and free at the other end, is

A)0.5L
B)0.7L
C)L
D)2L

Answer 3

2L

Question 4

The radius of gyration of a squar section is not proportional to

A)square root of the moment of inertia
B)square root of the inverse of the area
C)square root of the moment of inertia divided by area of the section
D)side of squar

Question 5

The length of a column, having a uniform circular cross-section of 7.5 cm diameter and whose ends are hinged, is 5 m. If the value of E for the material is 2100 kN/cm², the permissible maximum crippling load will be

A)1.288 kN
B)12.88 kN
C)128.8 kN
D)288.0 kN

Question 6

A sudden increase or decrease in shear force diagram between any two points indicates that there is

A)No loading between the two points
B)Point loads between the two points
C)U.D.L. between the two points
D)None of these

Question 7

A beam is a structural member which is subjected to

A)Axial tension or compression
B)Transverse loads and couples
C)Twisting moment
D)No load, but its axis should be horizontal and x-section rectangular or circular

Question 8

Which of the following are statically determinate beams?

A)Only simply supported beams
B)Cantilever, overhanging and simply supported
C)Fixed beams
D)Continuous beams

Question 9

A cantilever is a beam whose

A)Both ends are supported either on rollers or hinges
B)One end is fixed and other end is free
C)Both ends are fixed
D)Whose both or one of the end has overhang

Question 10

In a cantilever carrying a uniformly varying load starting from zero at the free end, the shear force diagram is

A)A horizontal line parallel to x-axis
B)A line inclined to x-axis
C)Follows a parabolic law
D)Follows a cubic law

Question 11

In a cantilever carrying a uniformly varying load starting from zero at the free end, the Bending moment diagram is

A)A horizontal line parallel to x-axis
B)A line inclined to x-axis
C)Follows a parabolic law
D)Follows a cubic law

Question 12

In a simply supported beam, bending moment at the end

A)Is always zero if it does not carry couple at the end
B)Is zero, if the beam has uniformly distributed load only
C)Is zero if the beam has concentrated loads only
D)May or may not be zero

Question 13

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

Question 14

For any part of a beam between two concentrated load, Bending moment diagram is a

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

Question 15

For any part of a beam subjected to uniformly distributed load, Shear force diagram is

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

Question 16

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 17

In a simple supported beam having length = l and subjected to a concentrated load (W) at mid-point.

A)Maximum Bending moment = Wl/4 at the mid-point
B)Maximum Bending moment = Wl/4 at the end
C)Maximum Bending moment = Wl/8 at the mid-point
D)Maximum Bending moment = Wl/8 at the end

Question 18

In a cantilever subjected to a concentrated load (W) at the free end and having length =l, Maximum bending moment is

A)Wl at the free end
B)Wl at the fixed end.
C)Wl/2 at the fixed end
D)Wl at the free end.

Question 19

At a point in a simply supported or overhanging beam where Shear force changes sign and = 0, Bending moment is

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

Question 20

In a cantilever subjected to a combination of concentrated load, uniformly distributed load and uniformly varying load, Maximum bending moment is

A)Where shear force=0
B)At the free end
C)At the fixed end
D)At the mid-point

Question 21

Point of contra-flexure is a

A)Point where Shear force is maximum
B)Point where Bending moment is maximum
C)Point where Bending moment is zero
D)Point where Bending moment=0 but also changes sign from positive to negative

Question 22

Point of contra-flexure is also called

A)Point of maximum Shear force
B)Point of maximum Bending moment
C)Point of inflexion
D)Fixed end

Question 23

The slope of shear force line at any section of the beam is also called

A)Bending moment at that section
B)Rate of loading at that section
C)Maximum Shear force
D)Maximum bending moment

Question 24

The direction of shear stress in a loaded beam is

A)Horizontal
B)Horizontal as well as vertical
C)Vertical
D)None

Question 25

Shear stress in the beam acting on the cross section is

A)Normal to the cross section
B)Tangential to the cross section
C)Neither normal nor tangential
D)None