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# MCQ in Strength of Materials Part 2 | ECE Board Exam

This is the Multiple Choice Questions Part 2 of the Series in Strength of Materials as one of the General Engineering and Applied Sciences (GEAS) topics. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize yourself with each and every question 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.

Continue Practice Exam Test Questions Part 2 of the Series

Choose the letter of the best answer in each question.

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

Explanation:

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

Explanation:

53. Strength of materials can most aptly be described as โstatics of deformable _______ bodiesโ.

A. elastic

B. rigid

C. compressible

D. thermal

Explanation:

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

A. Pascalโs Law

B. Hookeโs Law

C. Youngโs Theorem

D. Farrellโs Law

Explanation:

55. The modulus of elasticity is also known as

A. Youngโs modulus

B. Modulus of rigidity

C. Hookeโs ratio

D. Yield strength

Explanation:

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

Explanation:

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

A. brittle

B. malleable

C. ductile

D. conductible

Explanation:

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

Explanation:

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

Explanation:

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

Explanation:

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

Explanation:

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

Explanation:

63. The maximum ordinate to the curve

A. yield strength

B. ultimate strength

C. tensile strength

D. both B and C are correct

Explanation:

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

A. Pascalโs Number

B. Factor of Safety

C. Youngโs Modulus

D. Poissonโs ratio

Explanation:

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

Explanation:

66. Defined as the ratio of the Youngโs modulus to the specific weight

A. Specific Strength

B. Specific Rigidity

C. Specific Modulus

D. Specific Gravity

Explanation:

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

Explanation:

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

Explanation:

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

A. Orthotropic

B. Isotropic

C. Anisotropic

D. Monotropic

Explanation:

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

A. Orthotropic

B. Isotropic

C. Anisotropic

D. Monotropic

Explanation:

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

A. Convection

B. Dilatation

C. Expansion

D. Mutation

Explanation:

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

A. Youngโs modulus

B. Modulus of rigidity

C. Bulk modulus

D. Shear modulus

Explanation:

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

Explanation:

74. The typical Youngโs modulus of steel is

A. 145 โ 170 GPa

B. 195 โ 210 GPa

C. 225 โ 240 GPa

D. 275 โ 310 GPa

Explanation:

75. Poissonโs ratio of glass

A. 0.16

B. 0.19

C. 0.23

D. 0.27

Explanation:

76. The yield strength of pure aluminum is

A. 7 โ 11 MPa

B. 7 โ 11 GPa

C. 2 โ 5 MPa

D. 2 โ 5 GPa

Explanation:

77. One Newton per square meter is one

A. Joule

B. Watt

C. Pascal

D. Kelvin

Explanation:

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

A. directly proportional to

B. inversely proportional to

C. less than

D. greater than

Explanation:

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

Explanation:

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

A. perpendicular

B. parallel

C. angled

D. skew

Explanation:

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

Explanation:

82. The maximum safe stress a material can carry

A. Optimum stress

B. Working stress

C. Differential stress

D. Partial stress

Explanation:

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

Explanation:

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

Explanation:

85. Engineering strain is also known as

A. Hooke strain

B. Cauchy strain

C. Couch strain

D. Pascal strain

Explanation:

86. When a material is stretched in one direction and the other direction tends to contract, the Poissonโs ratio is

A. Positive

B. Negative

C. Zero

D. Cannot be determined

Explanation:

87. When a material is stretched in one direction and the other direction tends to expand, the Poissonโs ratio is

A. Positive

B. Negative

C. Zero

D. Cannot be determined

Explanation:

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

Explanation:

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

Explanation:

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

A. Torsion

C. Circumferential shear

D. Centrifugal force

Explanation:

91. The angle of twist is measured in

A. Mils

D. Degrees

Explanation:

92. It is the rotational force down a shaft

A. Pressure

B. Torque

C. Torsion

Explanation:

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

Explanation:

94. The form of deformation of a spring is

A. Twisting

B. Volume expansion

C. Elongation

D. None of the above

Explanation:

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

Explanation:

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

Explanation:

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

Explanation:

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

Explanation:

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

Explanation:

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

Explanation:

### Complete List of MCQs in General Engineering and Applied Science per topic

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