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Q1. | If the section modulus of a beam is increased, the bending stress in the beam will. |

A. | not change [Wrong Answer] |

B. | increase [Wrong Answer] |

C. | decrease [Correct Answer] |

D. | None of these [Wrong Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ In the torsion equation the term

*J*/

*R*is called

shear modulus

section modulus

polar modulus

none of these

⇒ In a tensile test, when the material is stressed beyond elastic limit, the tensile strain __________ as compared to the stress.

decreases slowly

increases slowly

decreases more quickly

increases more quickly

⇒ In the below figure, the point

*B*represents upper yield point.

Correct

Incorrect

Maximum

None of these

⇒ In a beam subjected to pure bending, the intensity of stress in any fibre is __________ the distance of the fibre from the neutral axis.

equal to

less than

more than

directly proportional to

⇒ When there is a sudden increase or decrease in shear force diagram between any two points, it indicates that there is a

point load at the two points

no loading between the two points

uniformly distributed load between the two points

uniformly varying load between the two points

⇒ The deformation of a bar under its own weight compared to the deformation of same body subjected to a direct load equal to weight of the body is

same

double

half

four times

⇒ In order to avoid tearing off the plate at an edge, the distance from the centre of the rivet hole to the nearest edge of the plate (i.e. margin) should be (where

*d*= Diameter of rivet hole in mm)

d

1.5 d

2 d

2.5 d

⇒ In the below figure, curve

*D*represents mild steel.

Yes

No

Maximum

Minimum

⇒ A thin cylindrical shell of diameter (

*d*) length (

*l*) and thickness (

*t*) is subjected to an internal pressure (

*p*). The longitudinal stress in the shell is.

pd/t

pd/2t

pd/4t

pd/6t

⇒ The polar moment of inertia of a hollow shaft of outer diameter (

*D*) and inner diameter (

*d*) is?

n/16(D3-d3)

n/16(D4-d4)

n/32(D4-d4)

n/64(D4-d4)

⇒ The ratio of maximum shear stress developed in a rectangular beam and a circular beam of the same cross-sectional area is

2/3

3/4

1

9/8

⇒ The product of the tangential force acting on the shaft and its distance from the axis of the shaft (i.e. radius of shaft) is known as.

bending moment

twisting moment

torsional rigidity

flexural rigidity

⇒ In the tensile test, the phenomenon of slow extension of the material, i. e. stress increasing with the time at a constant load is called

creeping

yielding

breaking

plasticity

⇒ Shear modulus is the ratio of

linear stress to linear strain

linear stress to lateral strain

volumetric strain to linear strain

shear stress to shear strain

⇒ In case of eccentrically loaded struts __________ is preferred.

solid section

hollow section

composite section

reinforced section

⇒ If a material expands freely due to heating it will develop

thermal stresses

tensile stress

bending

compressive stress

⇒ The bending moment of a cantilever beam of length

*l*and carrying a uniformly distributed load of

*w*per unit length is __________ at the fixed end.

wl/4

wl/2

wl

wl2/2

⇒ The distance between the centre of a rivet hole to the nearest edge of plate, is called

margin

pitch

back pitch

diagonal pitch

⇒ Hooke's law holds good upto

yield point

limit of proportionality

breaking point

elastic limit

⇒ Mohr's circle is used to determine the stresses on an oblique section of a body subjected to.

direct tensile stress in one plane accompanied by a shear stress

direct tensile stress in two mutually perpendicular directions

direct tensile stress in two mutually perpendicular directions accompanied by a simple shear stress

all of the above

⇒ The critical neutral axis of a reinforced cement concrete beam is based on the principle that the neutral axis is situated at the centre of gravity of a given section.

True

False

Disagree

None of these

⇒ A concentrated load is one which?

acts at a point on a beam

spreads non-uniformly over the whole length of a beam

spreads uniformly over the whole length of a beam

varies uniformly over the whole length of a beam

⇒ A flitched beam is used to

change the shape of the beam

effect the saving in material

equalise the strength in tension and compression

increase the cross-section of the beam

⇒ The Rankine's theory for active earth pressure is based on the assumption that.

the retained material is homogeneous and cohesionless

the frictional resistance between the retaining wall and the retained material is neglected

the failure of the retained material takes place along a plane called rupture plane

all of the above

⇒ Longitudinal stress in a thin cylinder is

equal to the hoop stress

twice the hoop stress

half of the hoop stress

one-fourth of hoop stress

⇒ The Poisson's ratio for steel varies from.

0.23 to 0.27

0.27 to 0.30

0.31 to 0.34

0.32 to 0.42

⇒ A thin spherical shell of diameter (

*d*) and thickness (

*t*) is subjected to an internal pressure (

*p*). The stress in the shell material is.

pd/t

pd/2t

pd/4t

pd/8t

⇒ Poisson's ratio is defined as the ratio of

longitudinal stress and longitudinal strain

longitudinal stress and lateral stress

lateral stress and longitudinal stress

lateral stress and lateral strain

⇒ The thermal or temperature stress is a function of.

increase in temperature

modulus of elasticity

coefficient of linear expansion

all of these

⇒ Two solid shafts '

*A*' and '

*B*' are made of the same material. The shaft '

*A*' is of 50 mm diameter and shaft '

*B*' is of 100 mm diameter. The strength of shaft '

*B*' is __________ as that of shaft

*A*.

one-half

double

four times

eight times