This set of Structural Analysis Multiple Choice Questions & Answers (MCQs) focuses on “Force Method of Analysis: General Procedure”.
1. How many unknowns are there in the structure where joint A is fixed, joint B is pinned, C is between A and B, and a load P is applied at point C?
a) 1
b) 2
c) 3
d) 4
View Answer
Explanation: 4 unknown forces are there, 3 forces and one moment.
2. Is the structure described in the figure statically indeterminate?
a) True
b) False
View Answer
Explanation: 4 unknown forces and 3 reactions are there. So, it is statically indeterminate.
3. How many support reactions must be temporarily removed to make the structure redundant?
a) 1
b) 2
c) 3
d) 4
View Answer
Explanation: As the degree of indeterminacy is one, one of the support reactions is chosen to be redundant.
4. Which of the following forces cannot be chosen as a redundant force?
a) Vertical support at point A
b) P
c) Vertical support at B
d) Moment at A
View Answer
Explanation: Load P can’t be chosen as this is the load causing deflection. Rest all support forces can be chosen to be redundant.
5. In the displacement equation Δ/bb, what does the first ‘b’ stand for?
a) Where unknown reaction acts
b) Point whose deflection is considered
c) Can be anything
d) Depends upon load applied
View Answer
Explanation: First b refers to the point where load is specified, second B refers to the point where load is applied.
6. What is the compatibility equation for the given condition?
a) Δ/ bb – Δb = 0
b) Δ/ bb + Δb = 0
c) Δ/ bb – Δb > 0
d) Δ/ bb – Δb < 0
View Answer
Explanation: Both the displacement will be opposite in direction and equal in magnitude.
7. What load acts and in which direction at point B for the displacement to be fbb?
a) Unit, opposite to By
b) Unit, same as by
c) Small, opposite to By
d) Large, same as By
View Answer
Explanation: Displacement caused by unit load acting in the direction of By is termed as fbb.
8. Which of the following describes fbb?
a) Δ/ bb / By
b) By/ Δ / bb
c) Δ/ bb – By
d) Δ/ bb + By
View Answer
Explanation: Δ/ bb is actual displacement caused by By, and fbb is caused by unit load. So, its fbb times By Δ/ bb/By.
9. According to maxwell’s theorem:-
a) fab = faa
b) fbb = faa
c) fba = fab
d) fba = fbb
View Answer
Explanation: The displacement of a point B on a structure due to a unit load acting at point A is equal to the displacement of point A when the unit load is acting at point B.
10. Maxwell’s theorem doesn’t apply when external moments are placed on the beam.
State whether the above statement is true or false.
a) true
b) false
View Answer
Explanation: It is also applicable when external moments are acting on the structure instead of forces.
Sanfoundry Global Education & Learning Series – Structural Analysis.
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