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UPSC Civil Service Exam Questions - Engineering

Q1:

What is the total degree of indeterminancy, both internal and external of the plane frame ?

A 10

B 11

C 12

D 14

ANS:A - 10

Degree of indeterminacy = (3m+r)-(3j+m'-1).
m= 10.
r= 4*3=12.
j= 10.
m'= no.of members connected to internal hinges = 3.
Degree of indeterminacy=(3m+r)-(3j+m'-1)=30+12-30-3+1=10.