Question28:-A beam consists of a symmetrical rolled steel joist. The beam is simply supported at its ends and carries a point
load at the centre of the span. If the maximum stress due to bending is 140 MPA, find the ratio of depth of the beam section
to span in order that the central deflection may not exceed "(1)/(480)" of the span.

Correct Answer:- Option-B
Question29:-The Brinell Hardness Number (BHN}) of copper aluminium is
A:-Above 180
B:-60 to 180
C:-20 to 60
D:-Less than 20
Correct Answer:- Option-C
Question30:-A timber beam 16 cm wide and 20 cm deep is to be reinforced by bolting on two steel flitches 68೧7 16 6 00
1 cm in section. Find the moment of resistance, when
वे) The flitches are attached symmetrically at the top and bottom and
b) The flitches are attached symmetrically at the sides.
Allowable stress in timber is 6MN/*'m~(2)". What is the maximum stress in steel in each case 7
க உ ௨ 20௩ ண) where 55) ‏عم‎ *E_{w) are Young's moduli for steel and wood.
A:-50 kNm, 30 kNm
B:-20 kNm, 56 kNm
C:-48.8 kNm, 14.6 km
D:-12 kNm, 28 kNm
Correct Answer:- Option-C
Question31:-The type of foundation generally suitable for buildings on liquefiable soil deposit is
A:-Well foundation
B:-Raft foundation
C:-Spread footing
D:-Pile foundation
Correct Answer:- Option-D
Question32:-The maximum depth of pneumatic caisson is usually limited to
&:-10 71
8:-20 गी
C:-40 m
D:-90 m
Correct Answer:- Option-C
Question33:-Elongation produced in a bar of density “rho’, length I and Young's modulus E due to its self-weight.
கோட்டு
ரு
C:-*(0.81rhol~(2)}/(2N)"
D:-*(9.81rhol}/(2E)"
Correct Answer:- Option-A
Question34:-A simply supported beam of length | 15 subjected to load varying linearly from zero at one end to w per unit
length at the other end. Find the point where the deflection is maximum from left end.
A:-0.250Ib
8:-0.3261
£:-0.5191
D:-None of the above
Correct Answer:- Option-C

Question35:-A cantilever beam of length | is subject to uniformly distributed load of w per unit length for the entire span.
Find the expression for maximum deflection.

கே!

8;-:(17(4)/(81)7

ன்று

:-:(೪17(2)/(165/)7

Correct Answer:- Option-B
Question36:-Wrought iron contains carbon upto