85. In a built up section carrying a tensile force, the flanges of two channels are turned outward
A. to simplify the transverse connections
B. to minimise lacing to have greater lateral rigidity
C. all the above
D.none of the above.
86. Net sectional area of a tension member, is equal to its gross section area
A. plus the area of the rivet holes
B. divided by the area of rivet holes
C. multiplied by the area of the rivet holes
D. minus the area of the rivet holes
87. In a tension member if one or more than one rivet holes are off the line, the failure of the member depends upon:
C. diameter of the rivet holes
D. all the above.
88. Pick up the correct statement from the following
A. When the gauge distance is larger than the pitch, the failure of the _section may occur in a zig-zag line
B. When the gauge distance is smaller than the pitch, the failure of the section may occur in a straight right angle section through the centre of rivet holes
C. When the gauge distance and pitch are both equal, the failure to the section becomes more likely as the diameter of the holes increases
D. All the above.
89. For double angles carrying tension, placed back to back and connected to either side of the gusset plate, the sectional area of the section, is equal to cross sectional area of
A. the section
B. the section plus area of rivet holes
C. the section minus area of rivet holes
D. tthe section multiplied by the area of the rivet hole.
90. The allowable stress in axial tension is generally kept less if thickness of the member is more than
A. 10 mm
B. 12 mm
C. 15 mm
D. 20 mm
91. A tension member, if subjected to possible reversal of stress due to wind, the slenderness ratio of the member should not exceed
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