theory of structures Mcqs
151. The vertical reaction for the arch is________________?
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A. wa/l

B. wa/2l

C. wl/a

D. wa/2l

152. A three hinged arch is generally hinged at its supports and__________________?
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A. At one quarter span

B. None of these

C. At the crown

D. Anywhere in the rib
153. A lift of weight W is lifted by a rope with an acceleration f. If the area of cross-section of the rope is A, the stress in the rope is_______________?
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A. [W (1 + f/ G)]/ A

B. [W (2 + g/f)]/A

C. [W (2 + f/G)]/A

D. (1 g/f)/A

154. Pick up the correct statement from the following?
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A. In a loaded beam, the moment at which the entire section of the beam becomes fully plastic, is called plastic moment

B. In a fully plastic stage of the beam, the neutral axis divides the section in two sections of equal area

C. All the above

D. In a loaded beam, the moment at which the first yield occurs is called yield moment

155. section modulus of a square section of side B and that of a circular section of The ratio of the diameter D, is___________________?
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A. /16

B. 8-Mar

C. 3 /16

D. 15-Feb

156. For beams of uniform strength, if depth is constant______________?
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A. Width b M

B. Width b 3 M

C. Width b 1/M

D. Width b M

157. In plastic analysis, the shape factor for a circular section, is_________________?
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A. 1.5

B. 1.7

C. 1.75

D. 1.6

158. For beams breadth is constant__________________?
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A. Depth d M

B. Depth d 3

C. Depth d

D. Depth d 1/M

159. The area of the core of a column of cross sectional area A, is_______________?
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A. (1/3) A

B. (1/12) A

C. (1/6) A

D. (1/18) A
160. A concentrated load P is supported by the free end of a quadrantal ring AB whose end B is fixed. The ratio of the vertical to horizontal deflections of the end A, is______________?
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A. /6

B. /4

C. /2

D. /3

161. A simply supported beam A carries a point load at its mid span. Another identical beam B carries the same load but uniformly distributed over the entire span. The ratio of the maximum deflections of the beams A and B, will be________________?
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A. 3-Feb

B. 8-May

C. 8/5

D. 2-Mar

162. The force in EC of the truss shown in the given figure, is__________________?
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A. 4t tension

B. Zero

C. 5t compression

D. 5t tension

163. In a shaft, the shear stress is not directly proportional to_________________?
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A. Angle of twist

B. Length of the shaft

C. Radius of the shaft

D. Modulus of rigidity

164. The ratio of maximum shear stress to average shear stress of a circular beam, is________________?
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A. 4-Mar

B. 3-Feb

C. 4/3

D. 2-Mar

165. The forces acting on the bar as shown in the given figure introduce________________?
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A. None of these

B. Compressive stress

C. Tensile stress

D. Shear stress
166. A material may fail if______________?
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A. /2

B. Maximum strain exceeds /E

C. 0

D. Maximum shear stress exceeds

E. All the above
167. A bar L metre long and having its area of cross-section A, is subjected to a gradually applied tensile load W. The strain energy stored in the bar is_________________?
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A. WL/2AE

B. WL/AE

C. WL/AE

D. WL/2AE
168. A steel rod of sectional area 250 sq. mm connects two parallel walls 5 m apart. The nuts at the ends were tightened when the rod was heated to 100C. If steel = 0.000012/C, Esteel = 0.2 MN/mm2, the tensile force developed at a temperature of 50C, is_________________?
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A. 80 N/mm2

B. 150 N/mm2

C. 120 N/mm2

D. 100 N/mm 2