Civil Engineering - UPSC Civil Service Exam Questions - Discussion
Discussion Forum : UPSC Civil Service Exam Questions - Section 7 (Q.No. 38)
38.
A cantilever has rectangular cross-section and supports concentrated load at its free end initially. If depth and width of the beam sections are doubled, the deflection, at free end of the cantilever will reduce to what percentage of the initial deflection ?
Discussion:
9 comments Page 1 of 1.
Rahul verma said:
3 years ago
D is correct, totally agree.
Apcivilian said:
3 years ago
Yes, D is Right.
Mesbah Ullah said:
4 years ago
Here defl: =1/MOI, Keeping all thing constant.
Let us B=1UNIT and D = 2UNIT.
When we have only BandD then MOI=1/12 SO deflection is = 12units.
When B=2b=2UNITS and D=2d= 4UNITS then MOI= 32/3 SO defelction = 3/32,
Hence 3/32 =0.09375 or 9.375%.
Let us B=1UNIT and D = 2UNIT.
When we have only BandD then MOI=1/12 SO deflection is = 12units.
When B=2b=2UNITS and D=2d= 4UNITS then MOI= 32/3 SO defelction = 3/32,
Hence 3/32 =0.09375 or 9.375%.
Rakesh Sharma said:
4 years ago
Yes, agree with you @Bhuwan Bag,
The Answer will be - 93.75%.
The Answer will be - 93.75%.
Priyanka said:
5 years ago
D is the correct.
A Ali said:
5 years ago
6. 25% is the correct answer.
Bhuwan Bag said:
6 years ago
The answer should be 93.75%.
Dolly said:
7 years ago
D is the correct answer.
Chhaya said:
8 years ago
The answer is D.
wl^3/3EI,
I = BD^3/12.
wl^3/3EI,
I = BD^3/12.
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