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UPSC Civil Service Exam Questions - Engineering

Q1:

A square column section of size 350 mm is 350 mm is reinforced with four bars of 25 mm diameter and four bars of 16 mm diameter. Then the transverse steel should be :

A 5 mm dia @ 240 mm c/c

B 6 mm dia @ 250 mm c/c

C 8 mm dia @ 250 mm c/c

D 8 mm dia @ 350 mm c/c

ANS:C - 8 mm dia @ 250 mm c/c

Spacing 1. = L.L.D=350.

2 = 16 x dia of longitudnal bar ( min of 16 or 25 )
= 16x16 = 256.
3 = 300mm,
4 = 48 x transvere reinforcement,

Min of these value is taken;
So it is 16 x 16 =256 or 250.