 MCQs in Strength of Materials Part II

(Last Updated On: December 8, 2017) This is the Multiples Choice Questions Part 2 of the Series in Strength of Materials as one of the General Engineering and Applied Sciences (GEAS) topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including past Board Questions in General Engineering and Applied Sciences (GEAS), Strength of Materials Books, Journals and other Strength of Materials References.

Online Questions and Answers in Strength of Materials Series

Following is the list of multiple choice questions in this brand new series:

Strength of Materials MCQs
PART 1: MCQs from Number 1 – 50                        Answer key: PART I
PART 2: MCQs from Number 51 – 100                   Answer key: PART II
PART 3: MCQs from Number 101 – 150                 Answer key: PART III
PART 4: MCQs from Number 151 – 200                 Answer key: PART IV
PART 5: MCQs from Number 201 – 250                 Answer key: PART V

Continue Practice Exam Test Questions Part II of the Series

Choose the letter of the best answer in each questions.

51. Determine the maximum shearing stress in a helical steel spring composed of 20 turns of 20 mm diameter wire on mean radius of 80 mm when the spring is supporting a load of 2 kN?

• A. 121 MPa
• B. 130 MPa
• C. 150 MPa
• D. 120 MPa

52. A single bolt is used to lap joint two steel bars together. Tensile force on the bar is 20,000 N. Determine the diameter of the bolt required if the allowable shearing stress on it is 70 MPa.

• A. 25 mm
• B. 19 mm
• C. 15 mm
• D. 12 mm

53. Strength of materials can most aptly be described as “statics of deformable _______ bodies”.

• A. elastic
• B. rigid
• C. compressible
• D. thermal

54. It states that the elongation is proportional to the force

• A. Pascal’s Law
• B. Hooke’s Law
• C. Young’s Theorem
• D. Farrell’s Law

55. The modulus of elasticity is also known as

• A. Young’s modulus
• B. Modulus of rigidity
• C. Hooke’s ratio
• D. Yield strength

56. A ________ material is one having a relatively large tensile strain up to the point of rupture

• A. malleable
• B. brittle
• C. conductible
• D. ductile

57. A ________ material has a relatively small strain up to the point of rupture

• A. brittle
• B. malleable
• C. ductile
• D. conductible

58. The maximum stress that may be developed during a simple tension that the stress is a linear function of strain.

• A. elastic limit
• B. proportional limit
• C. yield point
• D. rupture point

59. The maximum stress that may be developed during a simple tension test such that there is no permanent or residual deformation when the load is entirely removed

• A. elastic limit
• B. proportional limit
• C. yield point
• D. rupture point

60. The region of the stress-strain curve extending from the origin to the proportional limit is called

• A. rigid range
• B. malleable range
• C. elastic range
• D. plastic range

61. The region of the stress-strain curve extending from the proportional limit to the point of rupture is called

• A. rigid range
• B. malleable range
• C. elastic range
• D. plastic range

62. The ordinate of the point at which there is an increase in strain with no increase in stress is known as

• A. elastic limit
• B. proportional limit
• C. yield point
• D. rupture point

63. The maximum ordinate to the curve

• A. yield strength
• B. ultimate strength
• C. tensile strength
• D. both B and C are correct

64. The ratio of the strain in the lateral direction to that in the axial direction

• A. Pascal’s Number
• B. Factor of Safety
• C. Young’s Modulus
• D. Poisson’s ratio

65. Defined as the ratio of the ultimate strength to the specific weight

• A. Specific Strength
• B. Specific Rigidity
• C. Specific Modulus
• D. Specific Gravity

66. Defined as the ratio of the Young’s modulus to the specific weight

• A. Specific Strength
• B. Specific Rigidity
• C. Specific Modulus
• D. Specific Gravity

67. One of the same elastic properties at all points in the body

• A. heterogeneous material
• B. multistate material
• C. homogenous material
• D. monostate material

68. One of having the same elastic properties in all directions at any one point of the body

• A. Orthotropic
• B. Isotropic
• C. Anisotropic
• D. Monotropic

69. Material that does not possess any kind of elastic symmetry

• A. Orthotropic
• B. Isotropic
• C. Anisotropic
• D. Monotropic

70. Material that has three mutually perpendicular planes of elastic symmetry

• A. Orthotropic
• B. Isotropic
• C. Anisotropic
• D. Monotropic

71. The change of volume per unit volume is defined as the

• A. Convection
• B. Dilatation
• C. Expansion
• D. Mutation

72. A measure of the resistance of a material to change of volume without change of shape or form

• A. Young’s modulus
• B. Modulus of rigidity
• C. Bulk modulus
• D. Shear modulus

73. Stresses arising when a change in temperature affects the original length of a body

• A. Kelvin stress
• B. Thermal stress
• C. Hydraulic stress
• D. Humid stress

74. The typical Young’s modulus of steel is

• A. 145 – 170 GPa
• B. 195 – 210 GPa
• C. 225 – 240 GPa
• D. 275 – 310 GPa

75. Poisson’s ratio of glass

• A. 0.16
• B. 0.19
• C. 0.23
• D. 0.27

76. The yield strength of pure aluminum is

• A. 7 – 11 MPa
• B. 7 – 11 GPa
• C. 2 – 5 MPa
• D. 2 – 5 GPa

77. One Newton per square meter is one

• A. Joule
• B. Watt
• C. Pascal
• D. Kelvin

78. Stress on an object is _________ its cross sectional area

• A. directly proportional to
• B. inversely proportional to
• C. less than
• D. greater than

79. The condition under which the stress is constant or uniform is known as

• A. Shearing stress
• B. Tangential stress
• C. Torsion
• D. Simple stress

80. Tensile and compressive stress are caused by forces _________ to the areas on which they act

• A. perpendicular
• B. parallel
• C. angled
• D. skew

81. Which of the following is/are known as tangential stress?

• A. Circumferential stress
• B. Hoop stress
• C. Girth stress
• D. All of the above

82. The maximum safe stress a material can carry

• A. Optimum stress
• B. Working stress
• C. Differential stress
• D. Partial stress

83. It is the change in shape and / or size of a continuum body after it undergoes a displacement between an initial and a deformed configuration

• A. Deformation
• B. Distortion
• C. Deflection
• D. Dilation

84. Expressed as the ration of total deformation to the initial dimension of the material body in which forces are being applied.

• A. Elasticity
• B. Dislocation
• C. Stress
• D. Strain

85. Engineering strain is also known as

• A. Hooke strain
• B. Cauchy strain
• C. Couch strain
• D. Pascal strain

86. When a material is stretched in one direction and the other direction tends to contract, the Poisson’s ratio is

• A. Positive
• B. Negative
• C. Zero
• D. Cannot be determined

87. When a material is stretched in one direction and the other direction tends to expand, the Poisson’s ratio is

• A. Positive
• B. Negative
• C. Zero
• D. Cannot be determined

88. Which of the following is known to have no contractions or expansion when stretched in the other direction?

• A. Cast iron
• B. Sand
• C. Auxetics
• D. Cork

89. Which of the following materials is known to expand instead of contracting when stretched in the other direction?

• A. Cast iron
• B. Sand
• C. Auxetics
• D. Cork

90. Is the twisting of an object due to an applied torque.

• A. Torsion
• B. Radial distortion
• C. Circumferential shear
• D. Centrifugal force

91. The angle of twist is measured in

• A. Mils
• D. Degrees

92. It is the rotational force down a shaft

• A. Pressure
• B. Torque
• C. Torsion
• D. Tangential load

93. It is made of elastic material formed into the shape of a helix which returns to its natural length when unloaded

• A. Autumn
• B. Spring
• C. Spiral
• D. Beam

94. The form of deformation of a spring is

• A. Twisting
• B. Volume expansion
• C. Elongation
• D. None of the above

95. A 6 mm bar is subjected to a tensile force of 4000 N. Find the stress.

• A. 333.33 MPa
• B. 70.74 MPa
• C. 435.34 MPa
• D. 43.30 MPa

96. If the circumference of the cross section of a cylindrical bar is 25mm, what maximum axial load can it handle if the stress is not to exceed 100 MPa?

• A. 4973.59 N
• B. 4932.43 N
• C. 4901.53 N
• D. 4892.43 N

97. What is the minimum diameter of a bar subjected to an axial load of 6.5 kN if its ultimate stress is 140 MPa

• A. 2.43 mm
• B. 4.24 mm
• C. 6.34 mm
• D. 7.69 mm

98. A hollow cylindrical baris subjected to an axial load of 4.5 kN. If the inner diameter is 3mm, what should the outer diameter be if it is not to exceed 125 MPa?

• A. 4.34 mm
• B. 8.53 mm
• C. 7.41 mm
• D. 5.34 mm

99. Determine the outside of a hollow steel tube that will carry a tensile load of 500 kN at a stress of 140 MPa. Assume the wall thickness to be one tenth of the outside diameter.

• A. 104 mm
• B. 113 mm
• C. 134 mm
• D. 153 mm

100. A 20 m bar with a square cross section of 9 mm2 is subjected to a tensile force without exceeding its ultimate stress. If the bar is to be replaced by cylindrical one, what should the diameter be?

• A. 4.34 mm
• B. 8.32 mm
• C. 3.39 mm
• D. 1.24 mm

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