Civil engineering Questions and solutions set - 7

Civil engineering Questions and solutions set - 7
Question:-
Option (A)
A-1 C-1 D-1
Option (B)
D-1 C-1 A-1
Option (C)
CDA
Option (D)
ADC
Correct Option:
C
Question Solution:
ABCD = I
=> ABCD D-1 C-1 = D-1 C-1
=> AB = D-1 C-1
=> A-1 AB = A-1 D-1 C-1
=> B = A-1 D-1 C-1
=> B-1 = (A-1 D-1 C-1)-1
= (C-1)-1 (D-1)-1 (A-1)-1
= CDA
Question:-
Option (A)
0
Option (B)
1
Option (C)
ln 2
Option (D)
(1/2) ln 2
Correct Option:
D
Question Solution:
tan =
=
=
=
= = ln2
Question:-
Option (A)
Option (B)
Option (C)
Option (D)
Correct Option:
A
Question Solution:

TakingΣMA=0
=> 10 x 3 + 5 x 9=VB x 6
=> VB=12.5 kN
VA=10 + 5 - 12.5
=2.5 kN
By moment area method, we have

δCA x LAC - δC/A
= × 3 - x x 3
=
Question:-
Option (A)
4.705 t, 0.295 t
Option (B)
9.41 t, 0.59 t
Option (C)
2.5 t, 2.5 t
Option (D)
None of these
Correct Option:
A
Question Solution:
Deflection of beams A and B will be same at midpoint. If WA and WB be the loads shared by beams A and B, then we have
=
=> =
=> = 16
Also,WA + WB = 10
therefore, 16WB + WB = 10
=> WB= 0.59 t
and WA = 9.41 t
Thus, support reactions for beam A
= = 4.705 t
Support reactions for beam B
= = 0.295 t