148. If the slenderness ratio is greater than 160, the allowable stress in axial compression is multiplied by a factor where x is xy

A.200

B.400

C.600

D.800

149. For a steel member of slenderness ratio 350, the allowable stress is 76 kg/cm2 if it is

A. HTW grade of thickness exceeding 32 mm

B. HT grade of thickness exceeding 45 mm

C. HT grade of thickness not exceeding 45 mm

D. All the above.

150. The allowable stress in axial tension for rolled I-sections and channels, is taken as

A. 1420 kg/cm2

B. 1500 kg/cm2

C. 2125 kg/cm2

D. 2285 kg/cm2

151. The maximum tensile and compressive bending stress in extreme fibres of rolled I-sections and channels on the effective section, is

A. 1500 kg/cm2

B. 1420 kg/cm2

C. 1650 kg/cm2

D. 2285 kg/cm2

152. Modified moment of inertia of sections with a single web, is equal to moment of inertia of the section about Y-Y axis at the point of maximum bending moment and is multiplied by the ratio of

A. area of compression flange at the minimum bending moment to the corresponding area at the point of maximum bending moment

B. area of tension flange at the minimum bending moment of the corresponding area at the point of maximum bending moment

C. total area of flanges at the maximum bending moment to the corresponding area at the point of maximum bending moment

D. none of these.

153. According to IS : 800-1962 the permissible bending stress in steel slab plates, is

A. 1500 kg/cm2

B. 1420 kg/cm2

C. 2125 kg/cm2

D. 1890 kg/cm2.

154. Tongue plates are provided in a steel girder at

A. the upper flange

B. the lower flange

C. the upper end of the web

D. the upper and lower ends of the web.

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