This set of Structural Analysis Multiple Choice Questions & Answers (MCQs) focuses on “Beams & Frames Static Indeterminacy”.
1. The number of equilibrium equations for the following space frame is ________
a) 1
b) 3
c) 6
d) 4
View Answer
Explanation: There are six equilibrium equations available for space frames are as follows ∑Fx=0, ∑Fy=0, ∑Fz=0, ∑Mx=0, ∑My=0, and ∑Mz = 0.
2. Which of the following is statically determinate structure?
a) Fixed beam
b) Continuous beam
c) Two hinged arch
d) Double overhanging
View Answer
Explanation: Double overhanging can be analysed by available three equilibrium equations i.e. ∑Fx=0, ∑Fy=0, and ∑M = 0.
3. External Static Indeterminacy of the following beam is _______
a) 2
b) 4
c) 3
d) 0
View Answer
Explanation: This is case of vertical loading only. Static indeterminacy = (2+2+1)–2 = 3.
4. External Static Indeterminacy for the following frame is _____
a) 0
b) 3
c) 4
d) 6
View Answer
Explanation: Frames are always of General loading case. Static indeterminacy = (3+3)–3=3.
5. External Static Indeterminacy for the following space frame is ________
a) 18
b) 9
c) 6
d) 10
View Answer
Explanation: This is space frame. Thus, fixed end will have six reactions and available equilibrium equations are also 6. Therefore, External Static Indeterminacy = (6+6+6+6)-6 = 18.
6. Internal Static Indeterminacy for the following space frame is _____
a) 18
b) 9
c) 6
d) 10
View Answer
Explanation: Internal static indeterminacy of space frame = 6 * no of boxes the structure has. Therefore, Internal static indeterminacy = 6*1 = 6.
7. Force release for the following space frame is _____
a) 3
b) 2
c) 6
d) 0
View Answer
Explanation: Force release for space frame is given by 3(m-1), where m is the no of member joining at hinged end. Therefore, Force release = 3(3-1) = 3*2 = 6.
8. Static Indterminacy for the following space frame is _____
a) 18
b) 9
c) 6
d) 0
View Answer
Explanation: Static Equilibrium = External Static Indeterminacy + Internal static indeterminacy – Internal static indeterminacy. Therefore Static Equilibrium = 18 + 6 – 6 = 18.
9. Static Indeterminacy for rigid jointed plane frame is given by __________
a) (m + r) – 2j
b) (m + r) – 3j
c) (3m + r) -3j
d) (6m + r) – 6j
View Answer
Explanation: Static Indeterminacy for rigid jointed plane frame is given by (3m + r) -3j. Where m, r and j stands for number of members, reactions and number of joints respectively.
10. Stresses will develop due to change in temperature in statically determinate structure.
a) True
b) False
View Answer
Explanation: Stresses will develop due to change in temperature, sinking of support and lack of fit in statically indeterminate structure only.
Sanfoundry Global Education & Learning Series – Structural Analysis.
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