This set of Structural Analysis Multiple Choice Questions & Answers (MCQs) focuses on “Internal Loadings at a Specified Point-1”.

We have followed following sign convention in our questions.

Following sign convention for force direction is followed:-

1. How has been the most popular sign convention has been decided?
a) Logically
b) Arbitrary
c) Easiest to use
d) There is no popular sign convention

Explanation: It has been decided randomly but, it is the most famous one to be used.

Following figure has been used in Q2-Q7.
In the following figure, all supports are roller type and B and D are hinges. All the options are given in KN and KN/M wherever applicable.
AB = BC = CD = DE = EF = FG = 2m.

2. What will be the internal force generated at hinge B due to the above loading?
a) 5
b) 10
c) 15
d) 20

Explanation: We will cut out the first part from point A to B (Since, B is a hinge). Now balancing moment about point A, internal force will come out to be 10KN.
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3. What will be the internal force generated at hinge D due to the above loading?
a) 5
b) 10
c) 15
d) 20

Explanation: We can separate the part from point B to D. Now, we have internal load at B so, we can balance moment about point C and find out the force at point D.

4. What will be the support force due to point C?
a) 5
b) 10
c) 15
d) 20

Explanation: This can be found out by balancing force in the part between both the hinges.

5. What will be the support reaction generated by support A?
a) 5
b) 10
c) 15
d) 20

Explanation: This can be found out by balancing force in the part between joints A and B.

6. What will be the support reaction generated by support E?
a) 5
b) 7.5
c) 10
d) 12.5

Explanation: This can be found out by balancing moment about point G in the part between joints D and F.

7. What will be the support reaction generated by support G?
a) 5
b) 7.5
c) 10
d) 12.5

Explanation: This can be found out by balancing force in the part between joints D and F.

Following figure has been used in Q8-Q10.
All the options are given in KN and KN/M wherever applicable.
Point A is pin support and point D is roller type support. Uniform horizontal load of 80KN/m is acting on beam AB.
AB = 5m, BC = CD = 2m

8. What will be the internal force in y direction at joint B?
a) 5
b) 10
c) 15
d) 20

Explanation: Balance moment about point A which will give support reaction at point D in Y direction. Now, balance force in y direction in beam BD.

9. What will be the internal force in x direction at joint B?
a) 0
b) 20
c) 30
d) 40

Explanation: Separate out the part between points B and D and balance the force along x direction.

10. What will be the internal moment generated at joint B due to above shown loading?
a) 170
b) 340
c) 510
d) 680

Explanation: It can be found out by balancing moment about point B in the part between points B and D.

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