theory of structures MCQs – Page 5

Practise focused theory of structures questions with marked answers for exam preparation and subject revision.

theory of structures Mcqs

81. The greatest load which a spring can carry without getting permanently distorted, is called_________________?
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A. Proof resilience

B. Stiffness

C. Proof stress

D. Proof load

82. A cantilever of length 2 cm and depth 10 cm tapers in plan from a width 24 cm to zero at its free end. If the modulus of elasticity of the material is 0.2 106 N/mm2, the deflection of the free end, is________________?
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A. 3 mm

B. 5 mm

C. 4 mm

D. 2 mm

83. Stress may be defined as_________________?
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A. None of these

B. Force per unit length

C. Force per unit area

D. Force per unit volume

84. d constant, the width of a cantilever of length l of uniform strength loaded with Keeping the depth a uniformly distributed load w varies from zero at the free end and________________?
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A. (5w/ l at the fixed end

B. (3w/ l at the fixed end

C. (2w/ l at the fixed end

D. (3w/ l at the fixed end

85. In the truss shown in given figure, the force in member BD is______________?
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A. 100 t compressive

B. Zero

C. 100 t tensile

D. Indeterminate

86. Y are the bending moment, moment of inertia, radius of curvature, modulus of If M, I, R, E, F, and elasticity stress and the depth of the neutral axis at section, then________________?
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A. I/M = R/E = F/Y

B. M/I = E/R = E/Y

C. M/I = R/E = F/Y

D. M/I = E/R = Y/F

87. The equivalent length of a column of length L having one end fixed and the other end free, is______________?
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A. 2L

B. L/2

C. L

D. L

88. The stiffness of the close coil helical spring is_________________?
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A. d4N/4D3n

B. 4D3N/d4n

C. 8D3N/d4n

D. d4N/8D3n

89. The load on a spring per unit deflection, is called______________?
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A. Proof stress

B. Proof load

C. Proof resilience

D. Stiffness

90. If Q is load factor, S is shape factor and F is factor of safety in elastic design, the following_______________?
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A. Q = S + F

B. Q = F S

C. Q = S F

D. Q = S F

91. The maximum B.M. due to an isolated load in a three hinged parabolic arch, (span l and rise h) having one of its hinges at the crown, occurs on either side of the crown at a distance_______________?
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A. h/4

B. l/4

C. l

D. l

92. Pick up the incorrect statement from the following: The torsional resistance of a shaft is directly proportional to___________________?
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A. Reciprocal of the length of the shaft

B. Modulus of rigidity

C. Moment of inertia of the shaft section

D. Angle of twist

93. The point of contraflexure is the point where_______________?
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A. B.M. is maximum

B. B.M. changes sign

C. S.F. is zero

D. B.M. is minimum

94. The strain energy due to volumetric strain________________?
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A. Is directly proportional to the square of exerted pressure

B. All the above

C. Is inversely proportional to Bulk modulus

D. Is directly proportional to the volume

95. 0. At its elastic limit, the following statement is true, 0/E__________________?
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A. /2E volume

B. Strain energy = 0

C. All the above

D. Maximum shear stress = /2

E. Strain is equal to

96. length of a column of length L, having one end fixed and other end hinged, is The equivalent_____________?
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A. L

B. L/2

C. L

D. 2 L

97. The ratio of moments of inertia of a triangular section about its base and about a centroidal axis parallel to its base, is_________________?
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A. 3.0

B. 1

C. 1.5

D. 2

98. In case of principal axes of a section________________?
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A. Sum of moment of inertia is zero

B. Product of moment of inertia is zero

C. None of these

D. Difference of moment inertia is zero

99. The moment of inertia of a triangular section (height h, base b) about its base, is_______________?
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A. b3h/12

B. bh3/12

C. bh/12

D. bh/12

100. For calculating the allowable stress of long columns known as_________________?
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A. Straight line formula

B. Rankines formula

C. Parabolic formula

D. Perrys formula

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