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Elements_02

📌 Are you interested in expanding your knowledge about machine design elements? Look no further! Our comprehensive collection of 50 thought-provoking questions is designed to enhance your understanding and stimulate your mind. Dive into the fascinating world of machine design and discover new insights that will sharpen your expertise. Get ready to challenge yourself and elevate your knowledge to new heights!

Elements_02

50問 • 1年前📌 Are you interested in expanding your knowledge about machine design elements? Look no further! Our comprehensive collection of 50 thought-provoking questions is designed to enhance your understanding and stimulate your mind. Dive into the fascinating world of machine design and discover new insights that will sharpen your expertise. Get ready to challenge yourself and elevate your knowledge to new heights!

Jacky Shane Luyas Buhia

問題一覧

1

For ACME thread the pressure angle normal to the thread is equal to:

B. 14.5°

2

How do you call the corrosion of iron-base-alloys?

A. Rusting

3

It is a failure prediction theory, which states that a part subjected to any combination of loads will fail (by yielding or fracturing) whenever the maximum shear stress exceeds a critical value. How do you call this failure prediction theory?

B. Maximum-shear-stress theory

4

How do you call a statistical data used to identify the most likely failure modes?

B. Fault free analysis

5

Is the advance of the tooth in the face width divided by circular pitch.

A. Face contact ratio

6

It may be defined as the displacement per length produced in a solid and as the result of stress. How do you call this?

C. Strain

7

It is the capacity of a material to absorb energy when it is deformed elastically and then, upon unloading, to increase this energy. What is this capacity of a material?

A. Resilience

8

How do you call the strain energy per unit volume required to stress a material from an unloaded state to the point of yielding?

D. Modulus of resilience

9

These are compounds of metallic elements, most frequently oxides, nitrides, and carbides.

C. Ceramics

10

Which of the following is the measure of modulus of elasticity?

C. Stiffness

11

Torsional deflection is a significant consideration in the design of shaft and the limit should be in the range of _______ degress/foot of length.

B. 0.08 to 1

12

For a universal joint shaft angle should be ____ degrees maximum and much less if in high rotational speed.

C. 15

13

It is a good design practice for steel line shafting to consider a limit to the linear deflection of ______ inch/foot length maximum.

B. 0.010

14

It is a rotating machine member that transmits power.

C. Shaft

15

A stationary member carrying pulleys, wheels and etc. that transmit power.

A. Axle

16

A line shaft is also known as _______.

C. main shaft

17

Which of the following shaft intermediate between a line shaft and a driven shaft ?

D. All of the above

18

Shorts shafts on machines are called _______.

D. spindles

19

For shafts, the shear due to bending is a maximum at the neutral plane where the normal stress is ______.

D. zero

20

Criteria for the limiting torsional deflection vary from 0.08 per foot of length for machinery shafts to _____ per foot.

A. 1 °

21

For transmission shafts the allowable deflection is one degree in a length of _______ diameters.

C. 20

22

An old rule of thumb for transmission shafting is that the deflection should not exceed _____ of length between supports.

A. 0.01 in. per foot

23

In general for machinery shafts, the permissible deflection may be closer to _____.

C. 0.002 in/ft

24

The speed at which the center of mass will equal the deflecting forces on the shaft with its attached bodies will then vibrate violently, since the centrifugal force changes its direction as the shaft turns.

A. Critical speed

25

For shaft, the minimum value of numerical combined shock and fatigue factor to be applied in every case to the computed bending moment is _____.

C. 1.5

26

It is suggested that the design factor on the yield strength be about 1.5 for the smooth load, about 2 to 2.25 for minor shock loads, and ____ when the loading reverses during operation.

D. 4.5

27

At a given section of an I beam the maximum bending stress occurs at the____.

C. outermost

28

The resultant of two or more forces is a ______.

D. resolution of forces

29

A single force could replace two or more forces acting together with the same effect in a mass called _______.

D. resultant

30

The frictional forces depends on coefficient of friction and ______.

B. normal force

31

Shear modulus is also known as _______.

B. Modulus of rigidity

32

The maximum stress induced in a material when subjected to intermittent or repeated load without causing failure.

B. Endurance limit

33

Internal stress exerted by the fibers to resist the action of outside force.

B. Shearing stress

34

Alloy steel axle under repeated load/stress will eventually fail if the load / stress are above the endurance for the steel under consideration. The endurance limit of the steel is therefore ________.

C. equal to half of the ultimate strength

35

Moment of inertia is also called _______.

C. rotational inertia

36

Deflection of a beam is ________.

A. inversely proportional to the modulus of elasticity and moment of inertia

37

Continuous stretching under load even if the stress is less than the yield point.

A. Creep

38

It is the opposite direction of parallel force.

C. Couple

39

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

D. measure of a distance

40

The differential of the shear equation is which of the following.

C. slope of the elastic curve

41

Could be defined as simply push and pull is known as _______.

A. Force

42

The changes in shape or geometry of the body due to action of a force on it is called deformation or _______.

C. strains

43

The deformation that results from a stress and is expressed in terms of the amount of deformation per inch.

D. Strain

44

The internal resistance a material offers to being deformed and is measured in terms of applied load.

D. Stress

45

The ability of metal to withstand forces thus following a number of twist.

D. Shear strength

46

The greatest unit pressure the soil can continuously withstand.

A. Bearing strength

47

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

C. Shearing stress

48

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

C. Residual stress

49

The stress or load induced by the tightening operation.

A. Initial stress

50

The three moment of equation may be used to analyze:

B. continuous beam

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問題一覧

1

For ACME thread the pressure angle normal to the thread is equal to:

B. 14.5°

2

How do you call the corrosion of iron-base-alloys?

A. Rusting

3

It is a failure prediction theory, which states that a part subjected to any combination of loads will fail (by yielding or fracturing) whenever the maximum shear stress exceeds a critical value. How do you call this failure prediction theory?

B. Maximum-shear-stress theory

4

How do you call a statistical data used to identify the most likely failure modes?

B. Fault free analysis

5

Is the advance of the tooth in the face width divided by circular pitch.

A. Face contact ratio

6

It may be defined as the displacement per length produced in a solid and as the result of stress. How do you call this?

C. Strain

7

It is the capacity of a material to absorb energy when it is deformed elastically and then, upon unloading, to increase this energy. What is this capacity of a material?

A. Resilience

8

How do you call the strain energy per unit volume required to stress a material from an unloaded state to the point of yielding?

D. Modulus of resilience

9

These are compounds of metallic elements, most frequently oxides, nitrides, and carbides.

C. Ceramics

10

Which of the following is the measure of modulus of elasticity?

C. Stiffness

11

Torsional deflection is a significant consideration in the design of shaft and the limit should be in the range of _______ degress/foot of length.

B. 0.08 to 1

12

For a universal joint shaft angle should be ____ degrees maximum and much less if in high rotational speed.

C. 15

13

It is a good design practice for steel line shafting to consider a limit to the linear deflection of ______ inch/foot length maximum.

B. 0.010

14

It is a rotating machine member that transmits power.

C. Shaft

15

A stationary member carrying pulleys, wheels and etc. that transmit power.

A. Axle

16

A line shaft is also known as _______.

C. main shaft

17

Which of the following shaft intermediate between a line shaft and a driven shaft ?

D. All of the above

18

Shorts shafts on machines are called _______.

D. spindles

19

For shafts, the shear due to bending is a maximum at the neutral plane where the normal stress is ______.

D. zero

20

Criteria for the limiting torsional deflection vary from 0.08 per foot of length for machinery shafts to _____ per foot.

A. 1 °

21

For transmission shafts the allowable deflection is one degree in a length of _______ diameters.

C. 20

22

An old rule of thumb for transmission shafting is that the deflection should not exceed _____ of length between supports.

A. 0.01 in. per foot

23

In general for machinery shafts, the permissible deflection may be closer to _____.

C. 0.002 in/ft

24

The speed at which the center of mass will equal the deflecting forces on the shaft with its attached bodies will then vibrate violently, since the centrifugal force changes its direction as the shaft turns.

A. Critical speed

25

For shaft, the minimum value of numerical combined shock and fatigue factor to be applied in every case to the computed bending moment is _____.

C. 1.5

26

It is suggested that the design factor on the yield strength be about 1.5 for the smooth load, about 2 to 2.25 for minor shock loads, and ____ when the loading reverses during operation.

D. 4.5

27

At a given section of an I beam the maximum bending stress occurs at the____.

C. outermost

28

The resultant of two or more forces is a ______.

D. resolution of forces

29

A single force could replace two or more forces acting together with the same effect in a mass called _______.

D. resultant

30

The frictional forces depends on coefficient of friction and ______.

B. normal force

31

Shear modulus is also known as _______.

B. Modulus of rigidity

32

The maximum stress induced in a material when subjected to intermittent or repeated load without causing failure.

B. Endurance limit

33

Internal stress exerted by the fibers to resist the action of outside force.

B. Shearing stress

34

Alloy steel axle under repeated load/stress will eventually fail if the load / stress are above the endurance for the steel under consideration. The endurance limit of the steel is therefore ________.

C. equal to half of the ultimate strength

35

Moment of inertia is also called _______.

C. rotational inertia

36

Deflection of a beam is ________.

A. inversely proportional to the modulus of elasticity and moment of inertia

37

Continuous stretching under load even if the stress is less than the yield point.

A. Creep

38

It is the opposite direction of parallel force.

C. Couple

39

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

D. measure of a distance

40

The differential of the shear equation is which of the following.

C. slope of the elastic curve

41

Could be defined as simply push and pull is known as _______.

A. Force

42

The changes in shape or geometry of the body due to action of a force on it is called deformation or _______.

C. strains

43

The deformation that results from a stress and is expressed in terms of the amount of deformation per inch.

D. Strain

44

The internal resistance a material offers to being deformed and is measured in terms of applied load.

D. Stress

45

The ability of metal to withstand forces thus following a number of twist.

D. Shear strength

46

The greatest unit pressure the soil can continuously withstand.

A. Bearing strength

47

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

C. Shearing stress

48

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

C. Residual stress

49

The stress or load induced by the tightening operation.

A. Initial stress

50

The three moment of equation may be used to analyze:

B. continuous beam