The maximum stress produced in a bar tapering section is at The maximum stress produced in a bar tapering section is at

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smaller endsmaller end

larger endlarger end

middlemiddle

anywhereanywhere

When a change in length takes place, the strain is known as When a change in length takes place, the strain is known as

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linear strainlinear strain

lateral strainlateral strain

volumetric strainvolumetric strain

shear strainshear strain

Within the elastic limit, shear stress is _____shear strain. Within the elastic limit, shear stress is _____shear strain.

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equal toequal to

less thanless than

directly proportional todirectly proportional to

inversely proportional toinversely proportional to

The ratio of linear stress to the linear strain is called The ratio of linear stress to the linear strain is called

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modulus of rigiditymodulus of rigidity

modulus of elasticitymodulus of elasticity

bulk modulusbulk modulus

poissons ratiopoissons ratio

When a body is subjected to two equal and opposite pulls, as a result of which the body tends to extend its length , the strain induced is When a body is subjected to two equal and opposite pulls, as a result of which the body tends to extend its length , the strain induced is

The elongation of a conical bar under its own weight is ____that of prismatic bar of the same length The elongation of a conical bar under its own weight is ____that of prismatic bar of the same length

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equal toequal to

halfhalf

one-thirdone-third

two-thirdtwo-third

The unit of modulus of elasticity is same as those of The unit of modulus of elasticity is same as those of

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stress, strain, pressurestress, strain, pressure

stress, force and modulus of elasticitystress, force and modulus of elasticity

strain, force and pressurestrain, force and pressure

stress,pressure and modulus of rigiditystress,pressure and modulus of rigidity

The length of a conical bar is l, diameter of base is d and weight per unit volume is w. It is fixed at its upper end and hanging freely. The elomgation of the bar under the action of its own weight will be The length of a conical bar is l, diameter of base is d and weight per unit volume is w. It is fixed at its upper end and hanging freely. The elomgation of the bar under the action of its own weight will be

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wl2/2Ewl2/2E

wl2/4Ewl2/4E

wl2/6Ewl2/6E

wl2/8Ewl2/8E

Youngs modulus may be defined as the ratio of Youngs modulus may be defined as the ratio of

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linear stress to lateral strainlinear stress to lateral strain

lateral strain to linear strainlateral strain to linear strain

linear stress to linear strainlinear stress to linear strain

shear stress to shear strainshear stress to shear strain

When a bar is subjected to a change of temperature and its deformation prevented, the stress induced in the bar is When a bar is subjected to a change of temperature and its deformation prevented, the stress induced in the bar is

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tensile stresstensile stress

compressive stresscompressive stress

shear stressshear stress

thermal stressthermal stress

A shear stress across a plane , is laways accompanied by a balancing shear stress across the plane and normalto it. A shear stress across a plane , is laways accompanied by a balancing shear stress across the plane and normalto it.

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11

nonenone

nonenone

The modulus of elasticity for mild steel is approximately equal to The modulus of elasticity for mild steel is approximately equal to

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10 kn/mm210 kn/mm2

80 kn/mm280 kn/mm2

100 kn/mm2100 kn/mm2

210 kn/mm2210 kn/mm2

Whenever a materials is loaded within elastic limit, stress is________strain Whenever a materials is loaded within elastic limit, stress is________strain

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equal toequal to

directly proportional todirectly proportional to

inversely proportional toinversely proportional to

none of the abovenone of the above

Which of the following statement is correct Which of the following statement is correct

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the stress is the pressure per unit areathe stress is the pressure per unit area

the strain is expressed in mmthe strain is expressed in mm

hook's law holds good upto the breaking pointhook's law holds good upto the breaking point

stress is directly proportional to the strain within the elastic limitstress is directly proportional to the strain within the elastic limit

The poissons ratio for steel varies from The poissons ratio for steel varies from

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0.23 to 0.270.23 to 0.27

0.25 to 0. 330.25 to 0. 33

0.31 to 0.340.31 to 0.34

0.32 to 0.420.32 to 0.42

Strain is equal to Strain is equal to

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original length/change in lengthoriginal length/change in length

change in length / original lengthchange in length / original length

original length x change in lengthoriginal length x change in length

original length + change in lengthoriginal length + change in length

The unit of strain is The unit of strain is

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N-mmN-mm

N/mmN/mm

mmmm

no unitno unit

The ratio of change in volume to the original volume The ratio of change in volume to the original volume

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linear strainlinear strain

lateral strainlateral strain

volumetric strainvolumetric strain

poissons ratiopoissons ratio

The deformation of a bar under its own weight is ______the deformation, if the same body is subjected to a direct load to weight of the body. The deformation of a bar under its own weight is ______the deformation, if the same body is subjected to a direct load to weight of the body.

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equal toequal to

halfhalf

doubledouble

quadruplequadruple

The ultimate tensile stress for mild steel is_______the ultimate compressive stress. The ultimate tensile stress for mild steel is_______the ultimate compressive stress.

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equal toequal to

less thanless than

greater thangreater than

none of the abovenone of the above

The thermal stress in a bar is ______ proportional to the change in temperature The thermal stress in a bar is ______ proportional to the change in temperature

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directlydirectly

indirectlyindirectly

transverselytransversely

none of the abovenone of the above

When a bar of length l and diameter d is rigidly fixed at the upper end and hanging freely, then the total elongation produced in the bar due to its own weight is When a bar of length l and diameter d is rigidly fixed at the upper end and hanging freely, then the total elongation produced in the bar due to its own weight is

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wl/2Ewl/2E

wl2/2Ewl2/2E

wl3/2Ewl3/2E

wl4/2Ewl4/2E

The youngs modulus of a material is 125 Gpa and poissons ratio 0.25. The modulus of rigidity of the material is The youngs modulus of a material is 125 Gpa and poissons ratio 0.25. The modulus of rigidity of the material is

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30 Gpa30 Gpa

50 Gpa50 Gpa

80 Gpa80 Gpa

100 Gpa100 Gpa

The planes, which carry no shear stress, are known as principle planes The planes, which carry no shear stress, are known as principle planes

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11

nonenone

nonenone

The deformation per unit length is called The deformation per unit length is called

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tensile stresstensile stress

compressive stresscompressive stress

shear stressshear stress

strainstrain

Hook's law holds good upto Hook's law holds good upto

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yield pointyield point

elastic limitelastic limit

plastic limitplastic limit

breaking pointbreaking point

The shear modulus of most materials with respect to the modulus of elasticity is The shear modulus of most materials with respect to the modulus of elasticity is

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equal to halfequal to half

less than halfless than half

more than halfmore than half

none of thesenone of these

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