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Mechanics of Materials

Total questions: 100

Worksheet time: 50mins

Name
Class
Date
1.

Varignon's theorem is used to determine _______.

a)

location of centroid

b)

moment of inertia

c)

mass moment of inertia

d)

moment of area

2.

What is the study of motion with reference to the force which causes the motion?

a)

Statics

b)

Dynamics

c)

Kinetics

d)

Kinematics

3.

An impulse causes an object's momentum to:

a)

change

b)

decrease

c)

increase

d)

remain constant/be conserved

4.

Momentum is a property related to the object's _____.

a)

motion and mass

b)

mass and acceleration

c)

motion and velocity

d)

weight and velocity

5.

Centrifugal force is ______.

a)

directly proportional to the radius of the curvature

b)

directly proportional to the square of the tangential velocity

c)

inversely proportional to the square of the tangential velocity

d)

inversely proportional to the radius of the curvature

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:

a)

moment of inertia

b)

friction

c)

torsion

d)

angular acceleration

7.

Momentum is the product of mass and _____.

a)

acceleration

b)

velocity

c)

force

d)

time

8.

The moment of inertia of a plane figure:

a)

increases as the distance of the axis moves farther from the centroid

b)

is maximum at the centroidal axis

c)

is zero at the centroidal axis

d)

decreases as the distance of the axis moves farther from the centroid

9.

To maximize the horizontal range of the projectile, which of the following applies?

a)

Maximize the velocity

b)

Maximize the angle of elevation and velocity

c)

Maximize the angle of elevation

d)

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 _______.

a)

first power

b)

second power

c)

third power

d)

fourth power

11.

A branch of physical science which deals with state of rest or motion of bodies under the action of forces.

a)

Mechanics

b)

Kinetics

c)

Kinematics

d)

Statics

12.

A branch of mechanics which deals with bodies at rest.

a)

Statics

b)

Dynamics

c)

Kinetics

d)

Kinematics

13.

The branch of mechanics which deals with bodies in motion is known as ______.

a)

Statics

b)

Dynamics

c)

Kinetics

d)

Kinematics

14.

The action of a force is characterized by:

a)

its magnitude

b)

the direction of its action

c)

point of application

d)

all of the above

15.

For a system to be in equilibrium:

a)

the force polygon must close

b)

all forces must be concurrent; if not acting parallel

c)

it must satisfy the 3 static equations

d)

all of the above

16.

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

a)

moment

b)

torque

c)

couple

d)

all of the above

17.

The ______ exerted by a force on a body is the measure of its effectiveness in turning the body about a certain pivot.

a)

couple

b)

torque

c)

moment arm

d)

all of the above

18.

A body is said to be in "rotational equilibrium" when:

a)

no net torque acts on it

b)

no net force acts on it

c)

its vector sum of the forces is zero

d)

the forces acting on the body are non-concurrent

19.

A couple consists of two forces, _____ in magnitude, parallel and oppositely directed.

a)

directly proportional

b)

equal

c)

unequal

d)

inversely proportional

20.

The _______ of the body or system is the point about with the product of the mass and moment arm sums up to zero.

a)

center of gravity

b)

center of mass

c)

centroid

d)

all of the above

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?

a)

Center of inertia

b)

Center of mass

c)

Centerpoint

d)

Center of gravity

22.

If an object exerts a normal force on a surface, then its normal force is:

a)

equal to the weight of the object

b)

less than the frictional force

c)

parallel to the surface

d)

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 _______.

a)

friction

b)

coefficient of friction

c)

angle of friction

d)

coefficient of sliding

24.

What is the moment of inertia of a triangle with respect to the base b?

a)

(bh^3)/12

b)

(bh^3)/6

c)

(bh^3)/36

d)

(bh^3)/3

25.

The moment of inertia of a triangle with respect to the base is ____ times its moment inertia with respect to its centroidal axis.

a)

2

b)

3

c)

4

d)

5

26.

What is the moment of inertia of a circle of radius r?

a)

(πr^4)/16

b)

(πr^4)/2

c)

(πr^4)/64

d)

(πr^4)/4

27.

The moment of inertia of the circle with respect to its tangent is ____ times its centroidal moment of inertia

a)

2

b)

3

c)

4

d)

5

28.

The moment of inertia of a rectangle with respect to the base is ____ times its moment of inertia with respect to the centroid

a)

2

b)

3

c)

4

d)

5

29.

What is the mass moment of inertia of a sphere of mass m and radius r?

a)

12mr2\frac{1}{2}mr^2  

b)

14mr2\frac{1}{4}mr^2  

c)

13mr2\frac{1}{3}mr^2  

d)

25mr2\frac{2}{5}mr^2  

30.

Given a cylinder of radius r, altitude h and mass m. What is its mass moment of inertia?

a)

12mr2\frac{1}{2}mr^2  

b)

14mr2\frac{1}{4}mr^2  

c)

13mr2\frac{1}{3}mr^2  

d)

25mr2\frac{2}{5}mr^2  

31.

A structure is called ______ if at least one of its individual member is a multiforce member.

a)

truss

b)

frame

c)

three-hinged arch

d)

bridge

32.

What is another term of moment of inertia?

a)

Moment of area

b)

Moment of mass

c)

Second moment of area

d)

All of the above

33.

The diagram of an isolated body with the representation of all external forces acting on it is called ______.

a)

maxwell diagram

b)

stress-strain diagram

c)

free body diagram

d)

shear and moment diagram

34.

What do you call a framework composed of members joined at their ends to form a rigid structure?

a)

Machine

b)

Truss

c)

Joist

d)

Purlin

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 ______.

a)

Law of reaction

b)

Varignon's theorem

c)

Mass moment of inertia

d)

Law of inertia

36.

The condition exists in structures where the reactive forces exceed the number of independent equations for equilibrium. What do you call such condition?

a)

Statically determinate

b)

Statically indeterminate

c)

Static equilibrium

d)

None of the above

37.

Two lengths of a steel wire are used to support a chandelier of weight W. The tension in the wire must:

a)

each be W/2

b)

each be W

c)

have a vector sum of magnitude W

d)

have a vector sum of magnitude > W

38.

The built-in or fixed support is capable of supporting which of the following loads?

a)

An axial load

b)

A transverse load

c)

A bending moment

d)

All of the above

39.

Which of the following BEST describes d'Alembert's principle?

a)

F=ma

b)

Stress is directly proportional to strain

c)

First law of motion

d)

F=kx

40.

Which of the following is closely related to d'Alembert's theorem?

a)

Newton's first law of motion

b)

Newton's second law of motion

c)

Newton's third law of motion

d)

Bernoulli's theorem

41.

What do you call the force on a rigid body caused by other bodies?

a)

Internal force

b)

External force

c)

Vector

d)

Natural force

42.

What do you call the force which holds parts of the rigid body together?

a)

Internal force

b)

External force

c)

Natural force

d)

Concentrated 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?

a)

Varignon's theorem

b)

Left-hand rule

c)

Right-hand rule

d)

Maxwell's diagram

44.

If a force, F is moved a distance d 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?

a)

Three-moment system

b)

Force-couple system

c)

Indeterminate balance system

d)

Linear force system

45.

How many reactions are there in a fixed or built-in support?

a)

1

b)

2

c)

3

d)

4

46.

All supports have only one reaction except:

a)

Roller

b)

Link

c)

Frictionless guide

d)

Pin connection

47.

The ratio of the applied force lever arm to the load lever arm is known as ______.

a)

Efficiency

b)

Mechanical advantage

c)

Determinancy

d)

Indeterminancy

48.

What is the term used to describe the process of determining member forces by considering loads one at a time?

a)

Superposition

b)

Traverse loading

c)

Cut-and-sum method

d)

Method of joints

49.

What is used to determine the reactions of a continuous beam?

a)

Method of section

b)

Method of joints

c)

Superposition method

d)

Three-moment equation

50.

All supports have two reactions except:

a)

Cable

b)

Frictionless hinge

c)

Pin connection

d)

Rough surface

51.

_______ is the change in shape of any materials when subjected to the action of a force.

a)

Moment of inertia

b)

Modulus of elasticity

c)

Strain

d)

Stress

52.

Which of the following forces can a roller support hold?

a)

Only horizontal forces

b)

Both horizontal and vertical forces simultaneously

c)

Only vertical forces

d)

Either vertical or horizontal forces but not both

53.

Which of the following laws expressed relation between stress and strain?

a)

Poisson's law

b)

Newton's law

c)

Young's law

d)

Hooke's law

54.

What do you call the inelastic (plastic) failure of the beam?

a)

Moment

b)

Rotation

c)

Buckling

d)

Crippling

55.

What loading occurs when the load is not applied through the centroid?

a)

Axial loading

b)

Local loading

c)

Neutral loading

d)

Eccentric loading

56.

Which of the following stresses has an area perpendicular to the force?

a)

Normal stress

b)

Shear stress

c)

Flexural stress

d)

Torsional stress

57.

Which of the following type of loadings does fatigue occurs?

a)

Plane load

b)

Static load

c)

Moving load

d)

Repeated load

58.

It is a quantity which measures the resistance of the mass to being revolved about the line.

a)

Modulus of elasticity

b)

Strain

c)

Stress

d)

Moment of inertia

59.

What do you call an overload condition that occurs near large concentrated loads?

a)

Web crippling

b)

Local buckling

c)

Vertical buckling

d)

Lateral buckling

60.

What do you call the relative stiffness when more than one spring or resisting member shares the load?

a)

Volumetric expansion

b)

Rigidities

c)

Stiffness

d)

Shear modulus

61.

Which of the following moment occurs where the shear is zero?

a)

Statistical moment

b)

One-way moment

c)

Resisting moment

d)

Maximum moment

62.

Which one will occur whenever there is a discontinuity or non-uniformity in an object?

a)

Stress riser

b)

Stress concentrations

c)

Principal stresses

d)

Combined stresses

63.

Any pair of equal, opposite and parallel forces constitutes which of the following?

a)

Couple

b)

Torque

c)

Moment

d)

Dead load

64.

Which of the following forces can a pinned support hold?

a)

Only horizontal forces

b)

Both horizontal and vertical forces simultaneously

c)

Only vertical forces

d)

Either vertical or horizontal forces but not both

65.

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?

a)

Elasticity

b)

Malleability

c)

Ductility

d)

Plasticity

66.

For any point in a loaded specimen, a plane can be found where the shear stress is zero. How do you call the normal stresses associated with this plane?

a)

Combined stresses

b)

Principal stresses

c)

Extreme stresses

d)

Loading stresses

67.

Which of the following refers to the number of reactions or members that would have to be removed in order to make the structure statically determinate?

a)

Degree of accuracy

b)

Degree of indeterminacy

c)

Degree of rigidity

d)

Degree of structure

68.

When all forces are acting on the same point, the force system is known as _______.

a)

Concurrent force system

b)

Collinear force system

c)

Coplanar force system

d)

Parallel force system

69.

The change in length per degree rise in temperature.

a)

Volume expansivity

b)

Ideal gas temperature

c)

Linear expansivity

d)

Temperature scale

70.

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?

a)

Yield strength

b)

Yield limit

c)

Elastic limit

d)

Proportional limit

71.

Which of the following refers to the amount of force required to cause a unit of deformation?

a)

Rigidity

b)

Modulus

c)

Strain

d)

Stiffness

72.

What do you call the greatest stress which the material is capable of withstanding without a deviation from acceptable stress to strain?

a)

Proportional limit

b)

Yield strength

c)

Elastic limit

d)

Ultimate strength

73.

Which of the following theorems stated on how the total moment is derived from a number of forces acting simultaneously at a point?

a)

Varignon's Theorem

b)

Maxwell's Theorem

c)

Hooke's Law

d)

Superposition Theorem

74.

Which of the following is a simple three-dimensional truss which consists of three axial members?

a)

Tripod

b)

Chords

c)

End posts

d)

Panels

75.

What is the sum of the strains in the three coordinate directions?

a)

Strain

b)

Stress

c)

Poisson's ratio

d)

Dilation

76.

Which of the following refers to the stress at failure?

a)

Working stress

b)

Allowable stress

c)

Rupture strength

d)

Ultimate strength

77.

If a load is applied through the centroid of a tension or compression member's section, what type of loading is it?

a)

Local loading

b)

Neutral loading

c)

Eccentric loading

d)

Axial loading

78.

Which of the following refers to the ratio of the unit lateral deformation to the unit longitudinal deformation?

a)

Mohr's ratio

b)

Young's ratio

c)

Poisson ratio

d)

Slenderness ratio

79.

What is the ratio of stress to strain below the proportional limit?

a)

Poisson ratio

b)

Young's modulus

c)

Hooke's consant

d)

Modulus of rigidity

80.

In the linear elastic region of the stress-strain diagram, what do you call the slope of the curve?

a)

Elastic limit

b)

Modulus of elasticity

c)

Ultimate strength

d)

Proportional limit

81.

In bending of a rectangular beam due to axial loading, where is the location of maximum shear stress?

a)

At the top edge

b)

At the bottom edge

c)

At the neutral axis

d)

At the location between the top edge and the neutral axis

82.

What refers to the elongation which is expressed on a fractional or percentage basis?

a)

Normal stress

b)

Strain

c)

Thermal elongation

d)

Modulus of rigidity

83.

What is the highest ordinate of the stress-strain diagram?

a)

Rapture strength

b)

Ultimate strength

c)

Yield strength

d)

Elastic strength

84.

Which of the following beams has two or more spans (i.e, three or more supports) and is statistically indeterminate?

a)

Continuous beam

b)

Cantilever beam

c)

Propped beam

d)

Fixed-end beam

85.

A specimen is subjected to a load. When the load is removed, the strain disappears. Which of the following statements is correct?

a)

The specimen is plastic

b)

The specimen is elastic

c)

The specimen has a high modulus of elasticity

d)

The specimen is ductile

86.

What do you call a simple mechanical machine with the ability to increase an applied force?

a)

Bearing

b)

Shaft

c)

Lever

d)

Spring

87.

What is another term for modulus of elasticity?

a)

Bulk modulus

b)

Shear strain

c)

Constant of elongation

d)

Young's moduluss

88.

The twisting moment of a shaft is _____ directly proportional to horsepower and _____ proportional to the speed.

a)

Inversely, inversely

b)

directly, directly

c)

inversely, directly

d)

directly, inversely

89.

What do you call a set of pin-connected axial members?

a)

Cable end

b)

Structural cell

c)

Truss

d)

Trestle

90.

Which of the following is true about a beam supported at both ends and carrying a uniformly distributed load?

a)

It has a uniform shear throughout the length of the beam

b)

It has its maximum shear at the supports

c)

It has its maximum shear at the center of the beam

d)

It has its maximum bending moment at the supports

91.

What force system combines the non-concurrent, non-parallel and non-coplanar forces?

a)

General three-dimensional system

b)

Polar force system

c)

Space force system

d)

Parallel force system

92.

Which of the choices below refers to an overload condition that occurs when a long, unsupported members rolls out of its normal plane?

a)

Web crippling

b)

Local buckling

c)

Vertical buckling

d)

Lateral buckling

93.

Which of the following factors are used to account for the non-uniform stress distribution?

a)

Stress concentration factors

b)

Principal stress factors

c)

Combined stress factors

d)

Mohr's factor

94.

For shear stress, what is the constant of proportionality?

a)

Shark modulus

b)

Shape modulus

c)

Shout modulus

d)

Shear modulus

95.

Which of the following stresses has an area parallel to the force?

a)

Normal stress

b)

Shear stress

c)

Flexural stress

d)

Longitudinal stress

96.

If an object is continuously loaded over a portion of its length, it is subjected to which type of loading?

a)

Dead load

b)

Concentrated load

c)

Distributed load

d)

Moving load

97.

What is the ratio of the ultimate stress to the allowable stress?

a)

Yield factor

b)

Safety stress

c)

Factor of safety

d)

Design factor

98.

The sum of the individual forces in a linear force system is called:

a)

Total force

b)

Axial force

c)

Concentrated force

d)

Equivalent resultant force

99.

It is the internal resisting moment of a beam. It is opposite in the sense to the bending moment but of the same magnitude.

a)

Strain

b)

Elastic limit

c)

Moment of resistance

d)

Modulus of elasticity

100.

To prevent translation while permitting rotation, a structure must be added with:

a)

Rivet

b)

Bearing

c)

Hinge

d)

Roller