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Mechanics of Materials
  • Yaku Yaku Shii

  • 問題数 100 • 11/16/2023

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    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