Mechanics of Materials
問題一覧
1
Varignon's Theorem is used to determine ________.
location of centroid
2
What us the study of motion with reference to the force which causes the motion?
Kinetics
3
An impulse causes:
the object's momentum to increase
4
Momentum is a property related to the object's ________.
motion and mass
5
centrifugal force is ______.
directly proportional to the square of the tangential velocity
6
A measure of the resistance of a body it offers to any change in its angular velocity, determined by the mass and distribution of its mass about the axis of rotation is known as:
moment of inertia
7
Momentum is the product of mass and _____.
velocity
8
The moment of inertia of a plane figure:
increases as distance of the axis moves farther from the centroid
9
To maximize the horizontal range of the projectile, which of the following applies?
The tangent function of the angle of trajectory must be equal to 1
10
Moment of inertia of any plane figure is expressed in units of length to the ______.
fourth power
11
A branch of physical science which deals with state of rest or motion of bodies under the action of forces.
Mechanics
12
A branch of mechanics which deals with bodies at rest
Statics
13
The branch of mechanics which deals with bodies in motion is known as ______.
Dynamics
14
The action of a force is characterized by:
all of the above
15
For a system to be in equilibrium:
all of the above
16
A pair of forces equal in magnitude, opposite in direction, and not in the same line is called ______.
couple
17
The ______ exerted by a force in a body is the measure of its effectiveness in turning the body about a certain pivot.
torque
18
A body is said to be in "rotational equilibrium" when:
no net torque acts on it
19
A couple consists of two forces, ____ in magnitude, parallel and oppositely directed.
equal
20
The _____ of the body or system is the point about with the product of the mass and moment arms sums up to zero.
center of mass
21
What do you call the point through which the resultant of the distributed gravity force passes regardless of the orientation of the body in space?
center of gravity
22
If an object exerts a normal force on a surface, then its normal force is:
perpendicular to the surface
23
Whenever the surfaces of two bodies are in contact, there will be a limiting amount of resistance to sliding between them. This is known as _____.
friction
24
What is the moment of inertia of a triangle with respect to the base b?
bh^3/12
25
The moment of inertia of a triangle with respect to the base is _____ times it's moment of inertia with respect to it's centroidal axis?
3
26
What is the moment of inertia of a circle of radius r?
πr^4/4
27
The moment of inertia of the circle with respect to its tangent is _____ times its centroidal moment of inertia.
5
28
The moment of inertia of a rectangle with respect to the base is ______ times it's moment of inertia with respect to the centroid
4
29
What is the mass moment of inertia of a sphere of mass m and radius r?
2/5 mr^2
30
Given a cylinder of radius r, altitude h and mass m. What is its mass moment of inertia?
1/2 mr^2
31
A structure is called _____ if at least one of its individual member is a multiforce member.
frame
32
What is another term of moment of inertia?
Second moment of area
33
The diagram of an isolated body with the representation of all external forces acting on it is called ______.
free-body diagram
34
What do you call a framework composed of members joined at their ends to form a rigid structure?
Truss
35
"The moment of the resultant of two concurrent forces with respect to a center of their planes is equal to the algebraic sum of the moments of the components with respect to the same center". This statement is otherwise known as ______.
Varignon's Theorem
36
The condition exists in structures where the reactive forced exceed the number of independent equations for equilibrium. What do you call such condition?
Statically indeterminate
37
Two lengths of a steel wire are used to support a chandelier of weight W. The tension in the wire must:
have a vector sum of magnitude W
38
The built-in or fixed support us capable of supporting which of the following loads?
All of the above
39
Which of the following BEST describes d'Alembert's principle?
F=ma
40
Which of the following closely related to d'Alembert's theorem?
Newton's second law of motion
41
What do you call the force on a rigid body caused by other bodies?
external force
42
What do you call the force which holds parts of the rigid body together?
internal force
43
The line of action of the moment vector is normal to the plane containing the force vector and the position vector. What is used to determine the sense or direction of the moment?
right-hand rule
44
if a force, F is moves a distance f from the original point of application, a couple, M, equal to Fd must be added to counteract the induced couple. What is the term used to describe this combination of moved force and the couple?
Force-couple system
45
How many reactions are there in a fixed or built-in support?
3
46
All supports have only one reaction except:
Pin connection
47
The ratio of the applied force lever arm to the load lever arm is known as ______.
mechanical advantage
48
What is the term used to describe the process of determining member forces by considering loads one at a time?
Superposition
49
What is the used to determine the reactions of a continuous beam?
Three-moment equation
50
Is the change in shape of any materials when subjected to the action of a force.
Strain
51
Which of the following forced can a roller support hold?
either vertical or horizontal forces but not both
52
Which of the following laws expressed relation between stress and strain?
Hooke's Law
53
What do you call the inelastic failure of the beam?
rotation
54
What loading occurs when the load is not applied through the centroid?
eccentric loading
55
Which of the following stressed has an area perpendicular to the force?
Normal stress
56
Which of the following type of loadings does fatigue occurs
repeated load
57
It is a quantity which measures the resistance of the mass to being revolved about the line.
Moment of inertia
58
What do you call an overload condition that occurs near large concentrated loads?
Local buckling
59
What do you call the relative stiffness when more than one spring or resisting member shares the load?
Rigidities
60
All supports have two reactions except:
Cable
61
Which one will occur whenever there is a discontinuity or non-uniformitu in an object?
stress concentrations
62
Any pair of equal, opposite and parallel forced constitutes which of the following?
Couple
63
Which of the following forced can a pinned support hold?
Both Horizontal and vertical forces simultaneously
64
What is the property of a body that tends to return to its original size or shape after a deformation and when the deforming forces have been removed?
Elasticity
65
For any point in a loaded specimen, a plane can be found where shear stress is zero. How do you call the normal stresses associated with this plane?
Principal Stresses
66
Which of the following refers to the number of reactions or members that would have to be removed in order to make the structure statistically determinate?
degree of indeterminacy
67
When all forces are acting on the same point, the force system is known as _____.
Concurrent force system
68
The change in length per degree rise in temperature
linear expansivity
69
What do you call the stress beyond which the material will not return to its original shape when unloaded but will retain a permanent deformation?
Elastic Limit
70
which of the following refers to the amount of force required to cause a unit of deformation?
stiffness
71
What do you call the greatest stress which the material is capable of withstanding without a deviation from acceptable stress to strain?
Proportional Limit
72
Which of the following is a simple three-dimensional truss which consists of three axial members?
Tripod
73
What is the sum of the strains in three coordinate directions?
Dilation
74
Which of the following refers to the stress at failure
rupture strength
75
If a load is applied through the centroid of tension or compression member's section, what type of loading is it?
Axial loading
76
Which of the following refers to the ratio of the unit lateral deformation to the unit longitudinal deformation?
Poisson ratio
77
In the linear elastic region of the stress-strain diagram; what do you call the slope of the curve?
Modulus of elasticity
78
In bending of a rectangular beam due to axial loading, where is the location of maximum shear stress?
at the neutral axis
79
Which of the following theorems stated on how the total moment is derived from a number of forces acting simultaneously at a point
Varignon's Theorem
80
Which of the following moment occurse where the shear is zero?
Maximum moment
81
What is the ratio of stress to strain below the proportional limit?
Young's Modulus
82
In the linera elastic region of the stress-strain diagram, what do you call the slope of the curve
modulus of elasticity
83
In bending of a rectangular beam due to axial loading, where is the location of maximum shear stress?
at the neutral axis
84
referes to the elongation which is expressed on a fractional or percentage basis
strain
85
what is the highest ordinate of the stress-strain diagram
ultimate strength
86
which of the following bream has two or more spans and is statistically indeterminate
continuous beam
87
A specimen is subjected to a load. When the load is removed, the strain disappears. Which of the following statements is correct?
The specimen is elastic
88
what do you call a simple mechanical machine with the ability to increase an applied force
lever
89
What is another term for modulus of elasticity
young's modulus l
90
The twisting moment of a shaft is _____ directly proportional to horsepower and _____ proportional to speed
directly, inversely
91
What do you call a set of pin-connected axial members?
Truss
92
Which of the following is true about a beam supported at both ends and carrying a uniformly distributed load?
it has its maximum shear at the supports
93
what force system combines the non-concurrent, non-parallel, and non-coplanar forces
General Three-dimensional system
94
which one of the choices below refers to an overload condition that occurs when a long, unsupported members roll out of its normal plane
lateral buckling
95
which of the following factors are used to account for the non-uniform stress factors
stress concentration factors
96
for shear stress, what is the constant of proportionality
shear modulus
97
which of the following stresses has an area parallel to the force
shear stress
98
if an object is continuously loaded over a portion of its length, it is subjected to which type of loading
distributed load
99
What is the ratio of the ultimate stress to the allowable stress
factor of safety
100
the sum of the individual forces in a linear force system is called:
equivalent resultant force
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41問 • 2年前問題一覧
1
Varignon's Theorem is used to determine ________.
location of centroid
2
What us the study of motion with reference to the force which causes the motion?
Kinetics
3
An impulse causes:
the object's momentum to increase
4
Momentum is a property related to the object's ________.
motion and mass
5
centrifugal force is ______.
directly proportional to the square of the tangential velocity
6
A measure of the resistance of a body it offers to any change in its angular velocity, determined by the mass and distribution of its mass about the axis of rotation is known as:
moment of inertia
7
Momentum is the product of mass and _____.
velocity
8
The moment of inertia of a plane figure:
increases as distance of the axis moves farther from the centroid
9
To maximize the horizontal range of the projectile, which of the following applies?
The tangent function of the angle of trajectory must be equal to 1
10
Moment of inertia of any plane figure is expressed in units of length to the ______.
fourth power
11
A branch of physical science which deals with state of rest or motion of bodies under the action of forces.
Mechanics
12
A branch of mechanics which deals with bodies at rest
Statics
13
The branch of mechanics which deals with bodies in motion is known as ______.
Dynamics
14
The action of a force is characterized by:
all of the above
15
For a system to be in equilibrium:
all of the above
16
A pair of forces equal in magnitude, opposite in direction, and not in the same line is called ______.
couple
17
The ______ exerted by a force in a body is the measure of its effectiveness in turning the body about a certain pivot.
torque
18
A body is said to be in "rotational equilibrium" when:
no net torque acts on it
19
A couple consists of two forces, ____ in magnitude, parallel and oppositely directed.
equal
20
The _____ of the body or system is the point about with the product of the mass and moment arms sums up to zero.
center of mass
21
What do you call the point through which the resultant of the distributed gravity force passes regardless of the orientation of the body in space?
center of gravity
22
If an object exerts a normal force on a surface, then its normal force is:
perpendicular to the surface
23
Whenever the surfaces of two bodies are in contact, there will be a limiting amount of resistance to sliding between them. This is known as _____.
friction
24
What is the moment of inertia of a triangle with respect to the base b?
bh^3/12
25
The moment of inertia of a triangle with respect to the base is _____ times it's moment of inertia with respect to it's centroidal axis?
3
26
What is the moment of inertia of a circle of radius r?
πr^4/4
27
The moment of inertia of the circle with respect to its tangent is _____ times its centroidal moment of inertia.
5
28
The moment of inertia of a rectangle with respect to the base is ______ times it's moment of inertia with respect to the centroid
4
29
What is the mass moment of inertia of a sphere of mass m and radius r?
2/5 mr^2
30
Given a cylinder of radius r, altitude h and mass m. What is its mass moment of inertia?
1/2 mr^2
31
A structure is called _____ if at least one of its individual member is a multiforce member.
frame
32
What is another term of moment of inertia?
Second moment of area
33
The diagram of an isolated body with the representation of all external forces acting on it is called ______.
free-body diagram
34
What do you call a framework composed of members joined at their ends to form a rigid structure?
Truss
35
"The moment of the resultant of two concurrent forces with respect to a center of their planes is equal to the algebraic sum of the moments of the components with respect to the same center". This statement is otherwise known as ______.
Varignon's Theorem
36
The condition exists in structures where the reactive forced exceed the number of independent equations for equilibrium. What do you call such condition?
Statically indeterminate
37
Two lengths of a steel wire are used to support a chandelier of weight W. The tension in the wire must:
have a vector sum of magnitude W
38
The built-in or fixed support us capable of supporting which of the following loads?
All of the above
39
Which of the following BEST describes d'Alembert's principle?
F=ma
40
Which of the following closely related to d'Alembert's theorem?
Newton's second law of motion
41
What do you call the force on a rigid body caused by other bodies?
external force
42
What do you call the force which holds parts of the rigid body together?
internal force
43
The line of action of the moment vector is normal to the plane containing the force vector and the position vector. What is used to determine the sense or direction of the moment?
right-hand rule
44
if a force, F is moves a distance f from the original point of application, a couple, M, equal to Fd must be added to counteract the induced couple. What is the term used to describe this combination of moved force and the couple?
Force-couple system
45
How many reactions are there in a fixed or built-in support?
3
46
All supports have only one reaction except:
Pin connection
47
The ratio of the applied force lever arm to the load lever arm is known as ______.
mechanical advantage
48
What is the term used to describe the process of determining member forces by considering loads one at a time?
Superposition
49
What is the used to determine the reactions of a continuous beam?
Three-moment equation
50
Is the change in shape of any materials when subjected to the action of a force.
Strain
51
Which of the following forced can a roller support hold?
either vertical or horizontal forces but not both
52
Which of the following laws expressed relation between stress and strain?
Hooke's Law
53
What do you call the inelastic failure of the beam?
rotation
54
What loading occurs when the load is not applied through the centroid?
eccentric loading
55
Which of the following stressed has an area perpendicular to the force?
Normal stress
56
Which of the following type of loadings does fatigue occurs
repeated load
57
It is a quantity which measures the resistance of the mass to being revolved about the line.
Moment of inertia
58
What do you call an overload condition that occurs near large concentrated loads?
Local buckling
59
What do you call the relative stiffness when more than one spring or resisting member shares the load?
Rigidities
60
All supports have two reactions except:
Cable
61
Which one will occur whenever there is a discontinuity or non-uniformitu in an object?
stress concentrations
62
Any pair of equal, opposite and parallel forced constitutes which of the following?
Couple
63
Which of the following forced can a pinned support hold?
Both Horizontal and vertical forces simultaneously
64
What is the property of a body that tends to return to its original size or shape after a deformation and when the deforming forces have been removed?
Elasticity
65
For any point in a loaded specimen, a plane can be found where shear stress is zero. How do you call the normal stresses associated with this plane?
Principal Stresses
66
Which of the following refers to the number of reactions or members that would have to be removed in order to make the structure statistically determinate?
degree of indeterminacy
67
When all forces are acting on the same point, the force system is known as _____.
Concurrent force system
68
The change in length per degree rise in temperature
linear expansivity
69
What do you call the stress beyond which the material will not return to its original shape when unloaded but will retain a permanent deformation?
Elastic Limit
70
which of the following refers to the amount of force required to cause a unit of deformation?
stiffness
71
What do you call the greatest stress which the material is capable of withstanding without a deviation from acceptable stress to strain?
Proportional Limit
72
Which of the following is a simple three-dimensional truss which consists of three axial members?
Tripod
73
What is the sum of the strains in three coordinate directions?
Dilation
74
Which of the following refers to the stress at failure
rupture strength
75
If a load is applied through the centroid of tension or compression member's section, what type of loading is it?
Axial loading
76
Which of the following refers to the ratio of the unit lateral deformation to the unit longitudinal deformation?
Poisson ratio
77
In the linear elastic region of the stress-strain diagram; what do you call the slope of the curve?
Modulus of elasticity
78
In bending of a rectangular beam due to axial loading, where is the location of maximum shear stress?
at the neutral axis
79
Which of the following theorems stated on how the total moment is derived from a number of forces acting simultaneously at a point
Varignon's Theorem
80
Which of the following moment occurse where the shear is zero?
Maximum moment
81
What is the ratio of stress to strain below the proportional limit?
Young's Modulus
82
In the linera elastic region of the stress-strain diagram, what do you call the slope of the curve
modulus of elasticity
83
In bending of a rectangular beam due to axial loading, where is the location of maximum shear stress?
at the neutral axis
84
referes to the elongation which is expressed on a fractional or percentage basis
strain
85
what is the highest ordinate of the stress-strain diagram
ultimate strength
86
which of the following bream has two or more spans and is statistically indeterminate
continuous beam
87
A specimen is subjected to a load. When the load is removed, the strain disappears. Which of the following statements is correct?
The specimen is elastic
88
what do you call a simple mechanical machine with the ability to increase an applied force
lever
89
What is another term for modulus of elasticity
young's modulus l
90
The twisting moment of a shaft is _____ directly proportional to horsepower and _____ proportional to speed
directly, inversely
91
What do you call a set of pin-connected axial members?
Truss
92
Which of the following is true about a beam supported at both ends and carrying a uniformly distributed load?
it has its maximum shear at the supports
93
what force system combines the non-concurrent, non-parallel, and non-coplanar forces
General Three-dimensional system
94
which one of the choices below refers to an overload condition that occurs when a long, unsupported members roll out of its normal plane
lateral buckling
95
which of the following factors are used to account for the non-uniform stress factors
stress concentration factors
96
for shear stress, what is the constant of proportionality
shear modulus
97
which of the following stresses has an area parallel to the force
shear stress
98
if an object is continuously loaded over a portion of its length, it is subjected to which type of loading
distributed load
99
What is the ratio of the ultimate stress to the allowable stress
factor of safety
100
the sum of the individual forces in a linear force system is called:
equivalent resultant force