UPSC Civil Service Exam Questions - Engineering

Q1:

The following observation relate to designing of laced column :
1. Single lacing systems on opposite planes shall preferably be in the same direction so that one is the shadow of the other.
2. Lacing bar should only be a flat.
3. The slenderness ratio of the lacing bars for compression shall not exceed 180.
4. Laced compression members are to be provided with tie plates of ends.
Of these observations :

A 1, 2, 3 and 4 are correct

B 1, 3 and 4 are correct

C 2 and 3 are correct

D 1 and 4 are correct

ANS:D - 1 and 4 are correct

The laced bar may be flat or angle section.

And SR should not exceed 145.

So, option D is correct.