Structural Analysis Questions and Answers – Influence Lines for Statically Indeterminate Beams-2

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

Answer: b
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

Answer: d
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

Answer: c
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.
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4. What will be the slope of ILD at point A?
a) 1
b) -1
c) 0
d) can’t say
View Answer

Answer: c
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

Answer: d
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.

A and C is a pin support while B is roller support.
XL and XR are centroid of uniform loading on beams AB and BC respectively.
IL and IR are given.
LR and LL are length of beams.
AR and AL are areas of beams.
Find the change in slope at point B

6. What is the change in slope at point B?
a) AR . XR/LR
b) AL . XL/IL
c) 0
d) AR . XR/E . LR
View Answer

Answer: c
Explanation: Since point B is roller support, there won’t be any change at of slope at point B.
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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

Answer: c
Explanation: We will be discussing this method in detail subsequently.

8. 3 moment method is valid in:-
a) single span beams
b) only double span beams
c) double and single span beams
d) only multiple span beams
View Answer

Answer: d
Explanation: This method is valid in only multiple span beam i.e. including double span.
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9. 3 moment method can be used in:-
a) single span beams
b) only double span beams
c) double and single span beams
d) all types of beams
View Answer

Answer: d
Explanation: Although it is not valid for single span beams, it can be used for them using some particular techniques.

Sanfoundry Global Education & Learning Series – Structural Analysis.

To practice all areas of Structural Analysis, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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