md3.3

50問 • 2年前

ユーザ名非公開

通報

問題一覧

In a specification schedule is used when the pipe specified as "schedule 80", the pipe corresponds to the

allowable stress

The modulus of elasticity for ordinary steel usually falls between____million pounds per square inch.

28 to 31

The modulus of elasticity is a measure of

stiffness

The modulus of elasticity for most metals in compression is usually taken as that in

tension

The ratio of moment and stress is called

section modulus

For a symmetrical cross-section beam the flexural stress is when the vertical shear is maximum,

zero

When tested in compression, ductile materials usually exhibit characteristics up to the yield strength as they do when tested in tension.

approximately the same

It has been said that 80% of the failures of machine parts have been

fatigue fallures

Cazand quotes values for steel showing Sn/Su ratios, often called endurance ratio, from

0.23 to 0.85

The discontinuity or change of section, such as scratches, holes, bends, or grooves is a

stress raiser

The degree of stress concentration is usually indicated by a

stress concentration factor

In a part at uniform temperature and not acted upon by an external load, any internal stresses that exist.

Residual stress

The stress or load induced by the tightening operation.

Initial stress

A type of failure due to instability is known as

buckling

The ratio of the length of the column and the radius of gyration of the cross-sectional area about a centroidal axis.

Slenderness ratio

Formula that applies to a very slender column is called:

Euler’s Formul:

If two principal stress is zero, the state stress is

uniaxial

If one principal stress is zero, the state stress is

biaxial

If all the principal stresses have finite values, the system is

triaxial

Under theories of failure for static loading of ductile material, the design stress is the

yield stress / factor of safety

Under theories of failure, the value of shear stress is that of tensile stress.

half

The theory of mechanics of materials shows that the results from the octahedral shear stress theory and those from the maximum distortion energy theory are.

the same

A kind of stress that is caused by forces acting along or parallel to the area

Shearing stress

Obtained by dividing the differential load dF by the dA over which it acts.

Stress

The highest ordinate in the stress - strain diagram or curve is called

ultimate strength

A pair of forces equal in magnitude opposite in direction, and not in the same line.

Couple

Framework composed of members joined at their ends to form a rigid structure is known as

truss

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

Young modulus

The ratio of the volume stress to the volume strain is called the coefficient of volume elasticity or

bulk modulus

The action of a force is characterized by

its magnitude

At highest or lowest point on the mornent diagram

shear is zero

The built-in or fixed support is capable of supporting

an axial load

The modulus of elasticity in shear is commonly called

modulus of rigidity

The stress beyond which the material will not return to its original shape when unloaded, but will retain a permanent deformation.

Elastic limit

Refers to the actual stress the material has when under load is known as

working stress

The safe soil bearing pressure of diesel engine is about

4890 kg per sq. cm

The machine foundation must have a factor of safety of

The load acts over a smaller area, and the continues to increase unit failure.

actual stress

in the stress-strain diagram where there is a large increase in strain with little or no increase in stress.

Yield strength

A _member that carries loads transverse to its axis

Beam

Which type of load that is applied slowly and is never removed?

Static load

When varying loads are applied that are not regular in their amplitude, the loading is called

Random loading

A measure of the relative safety of a load-carrying component is termed as

design factor

The condition, which causes actual stresses in machine members to be higher than nominal values predicted by the elementary direct and combined stress equations.

Stress concentration

The stress value, which is used, in the mathematical determination of the required size of the machine member.

Design stress

Typical values for Poison's ratio of cast iron is in the range of

0.25.to 0.27

Typical values for Poison's ratio of steel is in the range of

0.27 to 0.30

Typical values for Poison's ratio of aluminum and titanium is in the range of

0.30 to 0.33

The angle of inclination of the planes on which the principal stresses act is called

principal plane

It provides a very accurate prediction of failure of ductile materials under static loads or completely reversed normal, shear or combined stresses.

Distortion energy theory

machine design 2

machine design 2

comprelents

comprelents

md2

md2

md2.2

md2.2

md2 3rd set

md2 3rd set

md2 3b

md2 3b

pp mid

pp mid

PRE BOARD PIPE

PRE BOARD PIPE

PRE BOARD PIPE 2

PRE BOARD PIPE 2

PRE BOARD PIPE 3

PRE BOARD PIPE 3

PRE BOARD PIPE 4

PRE BOARD PIPE 4

PRE BOARD PIPE 5

PRE BOARD PIPE 5

PRE BOARD PIPE 6

PRE BOARD PIPE 6

PRE BOARD PIPE 7

PRE BOARD PIPE 7

PRE BOARD PIPE 8

PRE BOARD PIPE 8

PRE BOARD PIPE

PRE BOARD PIPE

ECONOMICS JAMES

ECONOMICS JAMES

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

In a specification schedule is used when the pipe specified as "schedule 80", the pipe corresponds to the

allowable stress

The modulus of elasticity for ordinary steel usually falls between____million pounds per square inch.

28 to 31

The modulus of elasticity is a measure of

stiffness

The modulus of elasticity for most metals in compression is usually taken as that in

tension

The ratio of moment and stress is called

section modulus

For a symmetrical cross-section beam the flexural stress is when the vertical shear is maximum,

zero

When tested in compression, ductile materials usually exhibit characteristics up to the yield strength as they do when tested in tension.

approximately the same

It has been said that 80% of the failures of machine parts have been

fatigue fallures

Cazand quotes values for steel showing Sn/Su ratios, often called endurance ratio, from

0.23 to 0.85

The discontinuity or change of section, such as scratches, holes, bends, or grooves is a

stress raiser

The degree of stress concentration is usually indicated by a

stress concentration factor

In a part at uniform temperature and not acted upon by an external load, any internal stresses that exist.

Residual stress

The stress or load induced by the tightening operation.

Initial stress

A type of failure due to instability is known as

buckling

The ratio of the length of the column and the radius of gyration of the cross-sectional area about a centroidal axis.

Slenderness ratio

Formula that applies to a very slender column is called:

Euler’s Formul:

If two principal stress is zero, the state stress is

uniaxial

If one principal stress is zero, the state stress is

biaxial

If all the principal stresses have finite values, the system is

triaxial

Under theories of failure for static loading of ductile material, the design stress is the

yield stress / factor of safety

Under theories of failure, the value of shear stress is that of tensile stress.

half

The theory of mechanics of materials shows that the results from the octahedral shear stress theory and those from the maximum distortion energy theory are.

the same

A kind of stress that is caused by forces acting along or parallel to the area

Shearing stress

Obtained by dividing the differential load dF by the dA over which it acts.

Stress

The highest ordinate in the stress - strain diagram or curve is called

ultimate strength

A pair of forces equal in magnitude opposite in direction, and not in the same line.

Couple

Framework composed of members joined at their ends to form a rigid structure is known as

truss

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

Young modulus

The ratio of the volume stress to the volume strain is called the coefficient of volume elasticity or

bulk modulus

The action of a force is characterized by

its magnitude

At highest or lowest point on the mornent diagram

shear is zero

The built-in or fixed support is capable of supporting

an axial load

The modulus of elasticity in shear is commonly called

modulus of rigidity

The stress beyond which the material will not return to its original shape when unloaded, but will retain a permanent deformation.

Elastic limit

Refers to the actual stress the material has when under load is known as

working stress

The safe soil bearing pressure of diesel engine is about

4890 kg per sq. cm

The machine foundation must have a factor of safety of

The load acts over a smaller area, and the continues to increase unit failure.

actual stress

in the stress-strain diagram where there is a large increase in strain with little or no increase in stress.

Yield strength

A _member that carries loads transverse to its axis

Beam

Which type of load that is applied slowly and is never removed?

Static load

When varying loads are applied that are not regular in their amplitude, the loading is called

Random loading

A measure of the relative safety of a load-carrying component is termed as

design factor

The condition, which causes actual stresses in machine members to be higher than nominal values predicted by the elementary direct and combined stress equations.

Stress concentration

The stress value, which is used, in the mathematical determination of the required size of the machine member.

Design stress

Typical values for Poison's ratio of cast iron is in the range of

0.25.to 0.27

Typical values for Poison's ratio of steel is in the range of

0.27 to 0.30

Typical values for Poison's ratio of aluminum and titanium is in the range of

0.30 to 0.33

The angle of inclination of the planes on which the principal stresses act is called

principal plane

It provides a very accurate prediction of failure of ductile materials under static loads or completely reversed normal, shear or combined stresses.

Distortion energy theory