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Question

Match List-I (Type of structure) with List-II (Statical indeterminacy) and select the correct answer using the codes given

below the lists:

Number of members = m

Number of joints = n

Number of reaction elements = r 

 

List- I

List- II

A.

Plane frame

1

M + r - 3n

B.

Space truss

2

6 m + r – 6n

C

Space frame

3

6 m+ r – 3 n

 

 

4

3 m + r – 3n

Codes: 

A       B       C
A.
1       2       3
B.
4       3       2
C.
2       1       3
D.
4       1       2
Answer ( Option D)

4       1       2

Solution

Plane frame: Ds = 3m + r - 3n
· pace truss: Ds = m + r - 3n
· Space frame: Ds = 6m + r - 6n

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