The economical depth d of a web plate in which allowable bearing stress is fb, a

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The economical depth d of a web plate in which allowable bearing stress is f_b, and the maximum bending moment is M, as suggested by Rawater and Clark, is
Options
A.
B.
C.
D.
E.

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1. If the area of cross-section of a single angle discontinuous strut is 30 cm² and allowable working stress corresponding to its slenderness ratio is 625 kg/cm², the safe load carrying capacity of the member, is
Options
A. 10 tonnes
B. 12 tonnes
C. 15 tonnes
D. 18 tonnes
E. 20 tonnes

2. Pick up the correct statement from the following:
Options
A. Tacking rivets are used if the minimum distance between centres of two adjacent rivets exceeds 12 t or 200 mm, whichever is less
B. Tacking rivets are not considered to calculate stress
C. Tacking rivets are provided throughout the length of a compression member composed of two components back to back
D. All the above.

4. Design of a riveted joint, is based on the assumption:
Options
A. Load is uniformly distributed among all the rivets
B. Shear stress on a rivet is uniformly distributed over its gross area
C. Bearing stress is uniform between the contact surfaces of the plate and the rivet
D. Bearing stress in the rivet is neglected
E. All the above.

10. For a single section used as a tension member, the given area is assumed
Options
A. 20% to 30% in excess of the net area
B. 30% to 40% in excess of the net area
C. 40% to 50% in excess of the net area
D. 50% to 60% in excess of the net area
E. 60% to 70% in excess of the net area.

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