問題一覧
1
At a given section of an I beam the maximum bending stress occurs at the
outermost
2
The resultant of two or more forces is a
resolution of forces
3
A single force could replace two or more forces acting together with same effect in a mass called
resultant
4
The frictional forces depends on coefficient of friction and
normal force
5
Shear modulus is also known as
Modulus of rigidity
6
The maximum stress induced in a material when subjected to intermittent or repeated load without causing failure.
Endurance limit
7
Internal stress exerted by the fibers to resist the action of outside force.
Shearing stress
8
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
equal to half of the ultimate strength
9
Moment of inertia is also called
rotational inertia
10
Deflection of a beam is
inversely proportional to the modulus of elasticity and moment of inertia
11
Continuous stretching under load even if the stress is less than the yield point.
Creep
12
It is the opposite direction of parallel force.
Couple
13
The ratio of the moment of inertia of the cross-section of the beam to the section modulus is
measure of a distance
14
The differential of the shear equation is which of the following.
slope of the elastic curve
15
Could be defined as simply push and pull is known as
Force
16
The changes in shape or geometry of the body due to action of a force on it is called deformation or
strains
17
Ability to resist deformation under stress is called
stiffness
18
The property of a material that relates the lateral strain to longitudinal strain is called
Poisson's ratio
19
The single force which produces the same effect upon a body as two or more forces acting together.
Resultant force
20
The ability of metal to resist being crushed is called
compressive stress
21
Finding the resultant of two or more forces is called
composition of forces
22
In general, the design stress and factor of safety are relate as follows
Design stress = ultimate stress divided by factor of safety
23
Stresses that are independent load.
Residual stress
24
The ratio of unit lateral deformation to unit longitudinal deformation.
Poisson's ratio
25
Separate forces, which can be so combined, are called
concurrent forces
26
Endurance strength is nearly proportional to the ultimate strength but not with
yield strength
27
The three moment equation may be used to analyze the
continuous beam
28
Poisson's ratio is the ratio of
lateral strain to longitudinal strain
29
The product of the resultant of all forces acting on a body and the time that the resultant acts.
Linear impulse
30
The system of forces and opposite collinear forces is added, which of the following if any is true?
equilibrium is maintained
31
What is the property of a material, which resists forces acting to pull the material apart?
Tensile strength
32
What is the metal characteristic to withstand forces that causes twisting?
Torsional strength
33
The unit deformation is called
strain
34
The total amount of permanent extension of the gage length measured after specimen has fractured and is expressed as percentage increase of the original length. A. B. C.
Elongation
35
Strength of a material is that of a stress intensity determined by considering the maximum test load to act over the original area of the test specimens.
Ultimate strength
36
The maximum stress, which is reached during a tension test.
Tensile strength
37
Which of the following is the differential of the shear equation?
Slope of the beam
38
The change in length per unit original length is
strain
39
The ability of material or metal to resist being crushed is
compressive strength
40
The ability of metals to withstand loads without breaking down is termed as
strength
41
The ability of a metal to withstand forces that causes a member to twist.
Torsional strength
42
The ratio of stress to strain within the elastic limit is called
modulus of elasticity
43
The last point at which a material may be stretched a still return to its undeformed condition upon release of the stress.
Elastic limit
44
The deformation that results from a stress and is expressed in terms of the amount of deformation per inch.
Strain
45
The internal resistance a material offers to being deformed and is measured in terms of applied load.
Stress
46
The maximum stress induced in a material when subjected to alternating or repeated loading without causing failure. A. B. C. D.
Endurance strength
47
The maximum stress to which a material may be subjected before failure occurs is called:
Ultimate strength
48
The total deformation measured in the direction of the line of stress.
Strain
49
The total resistance that a material offers to an applied load:
Stress
50
The ability of metal to withstand forces thus following a number of twist.
Shear strength
51
The ratio of the ultimate stress to the allowable stress.
Factor of safety
52
In a cantilever beam with concentrated load at the free end, the moment is
maximum at the wall
53
The greatest unit pressure the soil can continuously withstand.
Bearing strength
54
A specimen is subjected to a load. When the load is removed the strain disappears. From this information, which of the following can be deducted about this material?
It is elastic
55
A cantilever beam having a uniformly increasing load toward the fixed end.
has a reaction equal to the load
56
The coefficient of friction for dry surfaces
depends on the materials and the finish condition of the surface
57
The maximum stress to which a material may be subjected before failure occurs.
Ultimate stress
58
The total resistance that a material offers to an applied load.
Stress
59
If the areas of cross-sections of square and circular beams are the same and both are put to equal bending moment then the correct statement is
the square beam is more economical
60
Ties are load-carrying members that carry
axial tension loads
61
Auto frettage is the method of
prestressing thick cylinders
62
Mohr's circle can be used to determine ___ on inclined surface
principal stress
63
Modulus of rigidity can be defined as the ratio of
shear stress to shear strain
64
The total strain energy stored in a body is called
resilience
65
The elongation of a conical bar under its own weight is equal to
one third that of a prismatic bar of the same length
66
Which one is the incorrect statement about true stress-strain method?
There is no such phenomenon like true stress or true strain
67
The tensile stress of a material is given by
maximum load during test/ original cross-sectional
68
When a part is constrained to move and heated, it develops
compressive stress
69
For steel, the ultimate strength in shear as compared to in tension is nearly
one-half
70
The intensity of stress that causes unit strain is known as
modulus of elasticity
71
The ultimate tensile stress of mild steel, as compared to its ultimate compressive stress will be
more
72
The relation between modulus of elasticity E and modulus of elasticity in shear G, bulk modulus of elasticity K and Poisson's ratio is given by ____
E=2G(µ+1)
73
When shear force is zero along a section, the bending moment at that section will be
minimum or maximum
74
The stress strain curve for a glass rod during tensile test is
a sudden break
75
The ratio of average shear stress to maximum shear stress for a circular section is equal to______$
3/4
76
The ratio of bulk modulus to shear modulus for Poisson's ratio of 0.25 will be equal to______
1
77
The compression members tend to buckle in the direction of
least radius of gyration
78
The stress in an elastic material is
proportional to the displacement of the material acted upon by the force
79
The slenderness ratio of a column is generally defined as the ratio of its
unsupported length to its least radius of gyration
80
The linear portion of the stress-strain diagram of steel is known as
elastic range
81
Principal stresses occur on those planes
where the shearing stress is zero
82
The ratio of the moment of inertia of the cross-section of a beam to the section modulus is
a measure of distance
83
Structural steel elements subjected to torsion develop what kind of stress?
Shearing stress
84
The bending moment at a section of a beam is derived from the
sum of the moments of all external forces on one side of the section
85
The stress concentration factor
is the ratio of the maximum stress produced in a cross section to the average stress over the section
86
Poisson's ratio is the ratio of the
unit lateral deformation to the unit longitudinal deformation
87
Hooke's law for an isotropic homogeneous medium experiencing one-dimensional stress is known as
stress = E (strain)
88
The modulus of rigidity of a steel member is
defined as the unit shear stress divided by the unit shear deformation
89
The maximum bending moment of a beam simply supported at both ends and subject to a total load W uniformly distributed over its length L is expressed by the formula of _______
WL2/8
90
In a column (slenderness ratio>160), which of the following has the greatest influence on its tendency to buckle under a compressive load?
the length of the column
91
The area of the shear diagram of a beam between any two points on the beam is equal to the
change in moment between the two points
92
Poisson's ratio is principally used in_____
the stress-strain relationships where stresses are applied in more than one direction
93
Modulus of resilience is
a measure of a materials ability to store strain energy
94
Which of the following best describes the 0.2% offset yield stress?
It is the stress at which the material plastically strains 0.2%
95
Under very low deformation and at high temperature it is possible to have some plastic flow in a crystal at a shear stress lower than the critical shear stress. What is this phenomenon called?
Creep
96
In a stress-strain diagram what is the correct term for the stress level at e= 0.20% offset?
the offset yield stress
97
Under which type of loading does fatigue occur?
Repeated load
98
A specimen is subjected to a load. When the load is removed, the strain disappears. From this information, which of the following can be deduced about this material?
It is elastic
99
Which of the following may be the Poisson ratio of a material?
0.45
100
In pure torsion, the minimum torsional stress occurs at the center of the
long side