127. A diagram which shows the variations of the axial load for all sections of the span of a beam, is called

A. bending moment diagram (b) shear force diagram

B.(c) thrust diagram

C.(d) stress diagram

D. none of these.

128. The width b and lepth d of a beam cut from a wooden cylindrical log of 100 cm diameter for maximum strength are:

A. b = 57.73 cm,d= 81.65 cm

B. b = 81.65 cm,d = 57.73 cm

C. b =50.00 cm,d = 50.00 cm

D. b = 40.00 cm,d = 80.00 cm

129. Beams of uniform strength are preferred to those of uniform section because these are economical for

A. large spans

B. heavy weights

C. light weights

D. short spans.

130. A 8 metre long simply supported rectangular beam which carries a distributed load 45 kg/m. experiences a maximum fibre stress 160 kg/cm2. If the moment of inertia of the beam is 640 cm4, the overall depth of the beam is

A. 10 cm

B. 12 cm

C. 15 cm

D. 16 cm

131. If a rectangular beam measuring 10 x 18 x 40Q cm carries a unformly distributed load such that the bending stress developed is 100 kg/cm2. The intensity of the load per metre length, is

A. 240 kg

B. 250 kg

C. 260 kg

D. 270 kg

132. In the cantilever truss' (Fig. 6.1), the horizontal component of the reaction at A, is

A. 30 tonnes

B. 60 tonnes

C. 90 tonnes

D. 120 tonnes

133. The direction of the reaction at support B of a truss shown in Fig. 6.3 will beFig. 6.3

A. East of North

B. West of North

C. East of South

D. West of South

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