Structural Analysis Aptitude Test

This set of Structural Analysis Questions and Answers for Aptitude test focuses on “Analysis of Frames : No Sidesway-III”.

A and C are fixed supports. M acts at point B in clockwise direction. AB = BC = L. EI is constant throughout the frame.

1. What will be the value of Mba?
a) M/4
b) –M/4
c) M/2
d) –M/2
View Answer

Answer: c
Explanation: conserve moment at joint B.

2. What will be the value of Mbc?
a) M/4
b) –M/4
c) M/2
d) –M/2
View Answer

Answer: c
Explanation: Value of Mba and Mbc will be numerically equal as they both yield exact same equations.

3. What will be the value of Mab?
a) M/4
b) –M/4
c) M/2
d) –M/2
View Answer

Answer: a
Explanation: Since end A is fixed, half of Mba will be transferred to point A and its direction will remain same.

4. What will be the value of Mcb?
a) M/4
b) –M/4
c) M/2
d) –M/2
View Answer

Answer: a
Explanation: Since end C is fixed, half of Mbc will be transferred to point A and its direction will remain same.

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5. What will be the value of rotation at point B?
a) ML/EI
b) ML/2EI
c) ML/4EI
d) ML/8EI
View Answer

Answer: d
Explanation: Just equate any of Mbc or Mba with its value.

6. What will be the vertical force at point A?
a) M/4L
b) 4M/L
c) -3M/4L
d) M/2L
View Answer

Answer: c
Explanation: Separate out member AB and conserve moment about point B.

7. What will be the vertical force at point C?
a) M/4L
b) 4M/L
c) 3M/4L
d) M/2L
View Answer

Answer: c
Explanation: Conserve vertical force in the entire frame.

8. What will be the horizontal force at point C?
a) M/4L
b) -3M/4L
c) 3M/4L
d) M/2L
View Answer

Answer: c
Explanation: Separate out member BC and conserve moment about point B.

9. What will be the horizontal force at point A?
a) M/4L
b) -3M/4L
c) 3M/4L
d) M/2L
View Answer

Answer: b
Explanation: Conserve horizontal force in the entire frame.

AB = BC = CD = 20m
All moment options are given in KN/m and all rotations in rad.
EI is constant.

10. This beam is a sway frame.
State whether this statement is true or false.
a) true
b) false
View Answer

Answer: b
Explanation: This frame is a non-sway frame as all supports, member and loading is symmetrical.

11. If value of EI in right frame member was twice that of the left one then this frame will be a sway one.
State whether this statement is true or false.
a) true
b) false
View Answer

Answer: a
Explanation: In that case, members won’t remain symmetric anymore and beams will deflect.

12. What will be the value of FEM_BC?
a) 66.7
b) -66.7
c) -160
d) 160
View Answer

Answer: b
Explanation: Formula for FEM in this type of loading is PL²/12 and direction will be anticlockwise.

13. What will be the value of FEM_CB?
a) 66.7
b) -66.7
c) -160
d) 160
View Answer

Answer: a
Explanation: Formula for FEM in this type of loading is PL²/12 and direction will be clockwise.

14. What will be the value of rotation at point A?
a) 137.1/EI
b) -137.1/EI
c) 0
d) 100/EI
View Answer

Answer: c
Explanation: There won’t be any rotation at point A as it is a fixed support.

15. What will be the value of rotation at point D?
a) 137.1/EI
b) -137.1/EI
c) 0
d) 100/EI
View Answer

Answer: c
Explanation: There won’t be any rotation at point D as it is a fixed support.

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