This set of Structural Analysis Multiple Choice Questions & Answers (MCQs) focuses on “Influence Lines for Statically Indeterminate Beams-2”.
1. What will be the value of Rba?
a) 1
b) 0
c) 2
d) 3
View Answer
Explanation: Δba will be zero as it is roller supported.
2. What will be the value of Rca?
a) 1
b) 0
c) 0.652
d) 0.852
View Answer
Explanation: It will be the ration of Δca and Δaa. Δaa is 1944/EI and Δca is 1656/EI.
3. What will be the value of Rda?
a) 1
b) 0
c) 0.481
d) 0.681
View Answer
Explanation: It will be the ration of Δda and Δaa. Δaa is 1944/EI and Δca is 936/EI. Join all these point for ILD.
4. What will be the slope of ILD at point A?
a) 1
b) -1
c) 0
d) can’t say
View Answer
Explanation: Since point A is fixed joint, slope will always be zero there.
5. What will be the shape of overall ILD?
a) straight line
b) parabola
c) hyperbola
d) arbitrary curve
View Answer
Explanation: ILD will be basically(approximately) a line passing through all above points but it will be a type of curve as slope near A will be zero and then slope will change.
6. What is the change in slope at point B, given that A and C are pin supports while B is a roller support? The centroids of the uniform loadings on beams AB and BC are at XL and XR, and the lengths of the beams are LR and LL, with areas AR and AL and moments of inertia IL and IR.
a) AR . XR/LR
b) AL . XL/IL
c) 0
d) AR . XR/E . LR
View Answer
Explanation: Since point B is roller support, there won’t be any change at of slope at point B.
7. Which of the following is method for solving indeterminate structures?
a) 1 moment equation
b) 2 moment equation
c) 3 moment equation
d) 4 moment equation
View Answer
Explanation: The 3-moment equation is a widely used method for solving indeterminate structures, which will be discussed in detail.
8. The 3-moment method is valid for which of the following?
a) single span beams
b) only double span beams
c) double and single span beams
d) only multiple span beams
View Answer
Explanation: The 3-moment method is valid only for multiple span beams, including double spans.
9. The 3-moment method can be used for which of the following types of beams?
a) single span beams
b) only double span beams
c) double and single span beams
d) all types of beams
View Answer
Explanation: While the 3-moment method is typically used for multiple span beams, it can also be applied to single span beams using specific techniques.
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