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.

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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

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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.

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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.

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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

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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.

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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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