md2 3b

50問 • 2年前

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問題一覧

The ratio of the ultimate stress to the allowable stress.

Factor of safety

In a cantilever beam with a concentrated load at the free end, the moment is

maximum at the wall

The greatest unit pressure the soil can continuously withstand.

Bearing strength

A specimen is subjected to a load. When the load is removed the strain disappears. From this information, which of the following can be deducted about this material?

It is elastic

A cantilever beam having a uniformly increasing load toward the fixed end.

has a reaction equal to the load

The coefficient of friction for dry surfaces

depends on the materials and the finish condition of the surface

The maximum stress to which a material may be subjected before failure occurs.

Ultimate stress

The total resistance that a material offers to an applied load.

Stress

If the areas of cross-sections of square and circular beams are the same and both are put to equal bending moment then the correct statement is

the square beam is more economical

Ties are load-carrying members that carry

axial tension loads

Auto frettage is the method of

prestressing thick cylinders

Mor's circle can be used to determine surface.

principal stress

Modulus of rigidity can be defined as the ratio of

shear stress to shear strain

The total strain energy stored in a body is called

resilience

The elongation of a conical bar under its own weight is equal to

one third that of a prismatic bar of the same length

Which one is the incorrect statement about true stress-strain method?

There is no such phenomenon like true stress or true strain

The tensile stress of a material is given by

maximum load during test / original cross-sectional area

When a part is constrained to move and heated, it develops

compressive stress

For steel, the ultimate strength in shear as compared to in tension is nearly

one-half

The intensity of stress that causes unit strain is known as

modulus of elasticity

The ultimate tensile stress of mild steel, as compared to its ultimate compressive stress will be

The relation between modulus of elasticity E and modulus of elasticity in shear G, bulk modulus of elasticity K and Poison's ratio is given by

E = 2G(u + 1)

When shear force is zero along a section, the bending moment at that section will be

minimum or maximum

The stress strain curve for a glass rod during tensile test is

a sudden break

The ratio of average shear stress to maximum shear stress for a circular section is equal to

3/4

The ratio of bulk modulus to shear modulus for Poison's ratio of 0.25 will be equal to

The compression members tend to buckle in the direction of

least radius of gyration

The stress in an elastic material is D. C. D.

proportional to the displacement of the material acted upon by the force

The slenderness ratio of a column is generally defined as the ratio of its

unsupported length to its least radius of gyration

The linear portion of the stress-strain diagram of steel is known as

elastic range

Principal stresses occur on those planes

where the shearing stress is zero

The ratio of the moment of inertia of the cross -section of a beam to the section modulus is

a measure of distance

Structural steel elements subjected to torsion develop what kind of stress?

Shearing stress

The bending moment at a section of a beam is derived from the

sum of the moments of all external forces on one side of the section

The stress concentration factor

is the ratio of the maximum stress produced in a cross section to the average stress over the section

Poison's ratio is the ratio of the

unit lateral deformation to the unit longitudinal deformation

Hooke's law for an isotropic homogeneous medium experiencing one-dimensional stress is known as

stress = E (strain)

The modulus of rigidity of a steel member

defined as the unit shear stress divided by the unit shear deformation

The maximum bending moment of a beam simply supported at both ends and subiect to a total load W uniformly distributed over its length L is expressed by the formula of

WL²/8

In a column (slenderness ratio>160), which of the following has the greatest influence on its tendency to buckle under a compressive load?

the length of the column

The area of the shear diagram of a beam between any two points on the beam is equal to the

change in moment between the two points

Poison's ratio is principally used in

the stress-strain relationships where stresses are applied in more than one direction

Modulus of resilience is

a measure of a materials ability to store strain energy

Which of the following best describes the 0.2% offset yield stress?

It is the stress at which the material plastically strains 0.2%

Under very low deformation and at high temperature it is possible to have some plastic flow in a crystal at a shear stress lower than the critical shear stress. What is this phenomenon called?

Creep

In a stress- strain diagram what is the correct term for the stress level at e = 0.20% offset?

the offset yield stress

Under which type of loading does fatigue occur?

Repeated load

A specimen is subjected to a load. When the load is removed, the strain disappears. From this information, which of the following can be deduced about this material?

It is elastic

Which of the following may be the Poison ratio of a material?

0.45

in pure torsion, the minimum torsional stress at the center of the

long side

machine design 2

machine design 2

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md2

md2.2

md2.2

md2 3rd set

md2 3rd set

md3.3

md3.3

pp mid

pp mid

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Machine Design refresher 1-2

ユーザ名非公開 · 6問 · 1年前

Machine Design refresher 1-2

6問 • 1年前

ユーザ名非公開

問題一覧

The ratio of the ultimate stress to the allowable stress.

Factor of safety

In a cantilever beam with a concentrated load at the free end, the moment is

maximum at the wall

The greatest unit pressure the soil can continuously withstand.

Bearing strength

A specimen is subjected to a load. When the load is removed the strain disappears. From this information, which of the following can be deducted about this material?

It is elastic

A cantilever beam having a uniformly increasing load toward the fixed end.

has a reaction equal to the load

The coefficient of friction for dry surfaces

depends on the materials and the finish condition of the surface

The maximum stress to which a material may be subjected before failure occurs.

Ultimate stress

The total resistance that a material offers to an applied load.

Stress

If the areas of cross-sections of square and circular beams are the same and both are put to equal bending moment then the correct statement is

the square beam is more economical

Ties are load-carrying members that carry

axial tension loads

Auto frettage is the method of

prestressing thick cylinders

Mor's circle can be used to determine surface.

principal stress

Modulus of rigidity can be defined as the ratio of

shear stress to shear strain

The total strain energy stored in a body is called

resilience

The elongation of a conical bar under its own weight is equal to

one third that of a prismatic bar of the same length

Which one is the incorrect statement about true stress-strain method?

There is no such phenomenon like true stress or true strain

The tensile stress of a material is given by

maximum load during test / original cross-sectional area

When a part is constrained to move and heated, it develops

compressive stress

For steel, the ultimate strength in shear as compared to in tension is nearly

one-half

The intensity of stress that causes unit strain is known as

modulus of elasticity

The ultimate tensile stress of mild steel, as compared to its ultimate compressive stress will be

The relation between modulus of elasticity E and modulus of elasticity in shear G, bulk modulus of elasticity K and Poison's ratio is given by

E = 2G(u + 1)

When shear force is zero along a section, the bending moment at that section will be

minimum or maximum

The stress strain curve for a glass rod during tensile test is

a sudden break

The ratio of average shear stress to maximum shear stress for a circular section is equal to

3/4

The ratio of bulk modulus to shear modulus for Poison's ratio of 0.25 will be equal to

The compression members tend to buckle in the direction of

least radius of gyration

The stress in an elastic material is D. C. D.

proportional to the displacement of the material acted upon by the force

The slenderness ratio of a column is generally defined as the ratio of its

unsupported length to its least radius of gyration

The linear portion of the stress-strain diagram of steel is known as

elastic range

Principal stresses occur on those planes

where the shearing stress is zero

The ratio of the moment of inertia of the cross -section of a beam to the section modulus is

a measure of distance

Structural steel elements subjected to torsion develop what kind of stress?

Shearing stress

The bending moment at a section of a beam is derived from the

sum of the moments of all external forces on one side of the section

The stress concentration factor

is the ratio of the maximum stress produced in a cross section to the average stress over the section

Poison's ratio is the ratio of the

unit lateral deformation to the unit longitudinal deformation

Hooke's law for an isotropic homogeneous medium experiencing one-dimensional stress is known as

stress = E (strain)

The modulus of rigidity of a steel member

defined as the unit shear stress divided by the unit shear deformation

The maximum bending moment of a beam simply supported at both ends and subiect to a total load W uniformly distributed over its length L is expressed by the formula of

WL²/8

In a column (slenderness ratio>160), which of the following has the greatest influence on its tendency to buckle under a compressive load?

the length of the column

The area of the shear diagram of a beam between any two points on the beam is equal to the

change in moment between the two points

Poison's ratio is principally used in

the stress-strain relationships where stresses are applied in more than one direction

Modulus of resilience is

a measure of a materials ability to store strain energy

Which of the following best describes the 0.2% offset yield stress?

It is the stress at which the material plastically strains 0.2%

Under very low deformation and at high temperature it is possible to have some plastic flow in a crystal at a shear stress lower than the critical shear stress. What is this phenomenon called?

Creep

In a stress- strain diagram what is the correct term for the stress level at e = 0.20% offset?

the offset yield stress

Under which type of loading does fatigue occur?

Repeated load

A specimen is subjected to a load. When the load is removed, the strain disappears. From this information, which of the following can be deduced about this material?

It is elastic

Which of the following may be the Poison ratio of a material?

0.45

in pure torsion, the minimum torsional stress at the center of the

long side