155. The greatest permissible clear dimension of the web of thickness t in the panel of a plate girder, is restricted to
A. 180 t
B. 220 t
C. 230 t
D. 270 t.
156. The least permissible clear dimension of the web of thickness t in the panel of a plate girder, is restricted to
A. 150 t
B. 160 t
C. 170 t
D. 180 t
157. The method of design of steel framework for greatest rigidity and economy in weight, is known as
A. simply design
B. semi-rigid design
C. fully rigid design
D. none of these.
158. The main assumption of the method of simple design of steel frame work, is
A. beams are simply supported
B. all connections of beams, girders and trusses are vir-tually flexible
C. members in compression are subjected to forces applied at appropriate eccentricities
D. all the above.
159. For the steel member exposed to weather and accessible for repainting, the thickness of steel should not be less than
A. 4 mm
B. 6 mm
C. 8 mm
D. 10 mm
160. For steel members exposed to weather and not accessible for repainting, the thickness of steel should not be less than
A. 4.5 mm
B. 6 mm
C. 8 mm
D. 10 mm.
161. For steel members not exposed to weather, the thickness of steel should not be less than
A. 4.5 mrn
B. 6 mm
C. 8 mm
D. 10 mm.
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