theory of structures MCQs – Page 6

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

theory of structures Mcqs

101. A spring of mean radius 40 mm contains 8 action coils of steel (N = 80000 N/mm2), 4 mm in diameter. The clearance between the coils being 1 mm when unloaded, the minimum compressive load to remove the clearance, is_____________?
0

A. 30 N

B. 25 N

C. 35 N

D. 40 N

102. A simply supported uniform rectangular bar breadth b, depth d and length L carries an isolated load W at its mid-span. The same bar experiences an extension e under same tensile load. The ratio of the maximum deflection to the elongation, is________________?
0

A. L/d

B. (L/2d)

C. L/2d

D. (L/3d)

103. The force in AD of the truss shown in given figure, is________________?
0

A. 3.0t compression

B. 4.0t compression

C. 0.5t tension

D. 0.5t compression

104. In the truss shown in given figure the force in member DC is________________?
0

A. 100 t tensile

B. Zero

C. Indeterminate

D. 100 t compressive

105. A load of 1960 N is raised at the end of a steel wire. The minimum diameter of the wire so that stress in the wire does not exceed 100 N/mm2 is________________?
0

A. 4.5 mm

B. 5.5 mm

C. 5.0 mm

D. 4.0 mm

106. A rectangular column shown in the given figure carries a load P having eccentricities ex and ey along X and Y axes. The stress at any point (x, y) is_______________?
0

A. (p/bd) [1 + (ey. y/d) + ( ex. x/d)]

B. p [1 + (6ey. y/b) + (6ex. x/ b)]

C. (p/bd) [1 + (6ey. y/d) + (6ex. x/b)]

D. (p/bd) [1 + (12ey. y/d) + (12ex. x/d)]

107. A simply supported beam carries a varying load from zero at one end and w at the other end. If the length of the beam is a, the shear force will be zero at a distance x from least loaded point where x is_________________?
0

A. a/2

B. a

C. a

D. a/3

108. A compound truss may be formed by connecting two simple rigid frames, by_________________?
0

A. Three bars intersecting at a point

B. Three bars

C. Three parallel bars

D. Two bars

109. A steel rod 1 metre long having square cross section is pulled under a tensile load of 8 tonnes. The extension in the rod was 1 mm only. If Esteel = 2 106 kg/cm2, the side of the rod, is_________________?
0

A. 2 cm

B. 1 cm

C. 1.5 cm

D. 2.5 cm

110. The ratio of the deflections of the free end of a cantilever due to an isolated load at 1/3rd and 2/3rd of the span, is________________?
0

A. 2/7

B. 7-Jan

C. 7-Mar

D. 5-Feb

111. The horizontal deflection of a parabolic curved beam of span 10 m and rise 3 m when loaded with a uniformly distributed load l t per horizontal length is (where Ic is the M.I. at the crown, which varies as the slope of the arch)___________________?
0

A. 200/EIc

B. 150/EIc

C. 100/EIc

D. 50/EIc

112. The forces acting normally on the cross section of a bar shown in the given figure introduce_______________?
0

A. Compressive stress

B. None of these

C. Tensile stress

D. Shear stress

113. The ratio of shear stress and shear strain of an elastic material, is________________?
0

A. Modulus of Rigidity

B. Shear Modulus

C. Modulus of Elasticity

D. Both A. and B

114. The forces in the members of simple trusses, may be analysed by________________?
0

A. Method of joints

B. All the above

C. Method of sections

D. Graphical method

115. In case of a simply supported rectangular beam of span L and loaded with a central load W, the length of elasto-plastic zone of the plastic hinge, is__________________?
0

A. L/3

B. L/5

C. L/2

D. L/4

116. The ratio of the stresses produced by a suddenly applied load and by a gradually applied load on a bar, is__________________?
0

A. 1

B. 2-Jan

C. 4-Jan

D. 2

117. Maximum shear stress theory for the failure of a material at the elastic limit, is known________________?
0

A. Rankines theory

B. Haigs theory

C. Guests or Trecas theory

D. St. Venants theory

118. The ratio of the length and depth of a simply supported rectangular beam which experiences maximum bending stress equal to tensile stress, due to same load at its mid span, is_______________?
0

A. 3-Jan

B. 2-Jan

C. 2/3

D. 4-Jan

119. A rolled steel joist is simply supported at its ends and carries a uniformly distributed load which causes a maximum deflection of 10 mm and slope at the ends of 0.002 radian. The length of the joist will be________________?
0

A. 10 m

B. 12 m

C. 16 m

D. 14 m

120. The horizontal thrust on the ends of a two hinged semicircular arch of radius carrying_________________?
0

A. end, is

B. A uniforml 4/3

C. non of these

D. . All the above

Previous Next

Showing 101 to 120 of 168 mcqs