The critical load for a column of length I hinged at both ends and having flexur

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The critical load for a column of length I hinged at both ends and having flexural rigidity El, is given by
Options
A.
B.
C.
D. none of these

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1. If the pitch is 6 cm and rivet value is 4 tonnes, the number of rivets required for a riveted connection carrying an eccentric load of 15 tonnes at a distance of 30 cm from the centre line, is
Options
A. 6
B. 8
C. 10
D. 12
E. 15

2. The minimum edge distance of a rivet line connecting two or more plates, is kept equal to 37 mm plus (where t is the thickness in mm of the thinner outside plate).
Options
A. 2 t
B. 4 t
C. 6 t
D. 8 t
E. 10 t

3. When a tension member is made of four angles with a plate as a web, the allowance for holes is made as
Options
A. two holes for each angle and one hole for the web
B. one hole for each angle and one hole for the web
C. one hole for each angle and two holes for the web
D. two holes for each angle and two holes for the web
E. none of these.

4. The equivalent axial tensile load P_e, which produces an average axial tensile stress in the section equivalent to the combined stress due to axial tension P and bending M, at the extreme fibre of the section, is given by (where Z is the section modulus of the section).
Options
A.
B.
C.
D.

6. The thickness t of a single flat lacing should not be less than
Options
A. 1/30 th length between inner end rivets
B. 1/40 th length between inner end rivets
C. 1/50 th length between inner end rivets
D. 1/60 th length between inner end rivets
E. none of these.

7. Column footing is provided
Options
A. to spread the column load over a larger area
B. to ensure that intensity of bearing pressure between the column footing and soil does not exceed permissible bearing capacity of the soil
C. to distribute the column load over soil through the column footing
D. all the above.

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