1. The structure is statically indeterminate when________________
a) static equilibrium equations are insufficient for determining internal forces and reactions on that structure
b) static equilibrium equations are sufficient for determining internal forces and reactions on that structure
c) structure is economically viable
d) structure is environment friendly
Discussion
Explanation: When the static equilibrium equations are insufficient for determining internal forces and reactions on that structure, the structure is said to be statically indeterminate. Analysis of these structures is complex and cannot be analysed only by using laws of statics, various analytical methods like slope deflection method, moment distribution method, etc.
2. Which of the following is one of the methods of analysis prescribed in the code for steel structures?
a) Hinge Analysis
b) Limit Analysis
c) Roller Analysis
d) Dynamic Analysis
Discussion
Explanation: Code suggests the use of any of the following methods for steel structures : (i) elastic analysis, (ii) plastic analysis, (iii) advanced analysis, (iv) dynamic analysis.
3. Which method is mainly adopted for design of steel structures as per IS code?
a) Limit State Method
b) Working Stress Method
c) Ultimate Load Method
d) Earthquake Load Method
Discussion
Explanation: Steel structures and their elements are normally designed by limit state method. When limit state method cannot be conveniently adopted, working stress method may be used.
4. Which IS code is used for general construction of steel?
a) IS 456
b) IS 256
c) IS 800
d) IS 100
Discussion
Explanation: IS 800:2007 is the code of practice for general construction in steel. It is issued by Bureau of Indian Standards.
5. Which of the following relation is correct?
a) Permissible Stress = Yield Stress x Factor of Safety
b) Permissible Stress = Yield Stress / Factor of Safety
c) Yield Stress = Permissible Stress / Factor of Safety
d) Permissible Stress = Yield Stress – Factor of Safety
Discussion
Explanation: Permissible Stress = Yield Stress / Factor of Safety. Permissible Stress is the amount of stress that will not cause failure. It is a fraction of yield stress. It takes care of overload or other unknown factors.
6. In Working Stress Method, which of the following relation is correct?
a) Working Stress ≤ Permissible Stress
b) Working Stress ≥ Permissible Stress
c) Working Stress = Permissible Stress
d) Working Stress > Permissible Stress
Discussion
Explanation: In Working Stress Method, Working Stress ≤ Permissible Stress. Each member is checked for number of different combinations of loadings.
7. What is Load Factor?
a) ratio of working load to ultimate load
b) product of working load and ultimate load
c) product of working load and factor of safety
d) ratio of ultimate load to working load
Discussion
Explanation: Load Factor = working load / ultimate load. In ultimate load design, different types of loads and load combinations have different load factors assigned.
8. Which of the following is not a main element of framed structure?
a) Beam
b) Column
c) Shear connector
d) Lattice member
Discussion
Explanation: For framed structure, the main elements are beam, column, beam-column, tie and lattice members.
9. Which of the following are subjected to both axial loads and bending moments?
a) Beam-Column
b) Column
c) Lattice member
d) Beam
Discussion
Explanation: Beams are those elements which are subjected to bending moments and shear force only. Columns are subjected to axial loads. Beam-Column is subjected to axial load and bending moment. In special cases, beams are subjected to torsional moments.
10. How much percentage increase of permissible stress is allowed when dead load, live load and wind load are considered together in working stress method?
a) 50%
b) 33%
c) 40%
d) 60%
Discussion
Explanation: In working stress method, working stress ≤ permissible stress.
Stress due to dead load + live load ≤ permissible stress
Stress due to dead load + wind load ≤ permissible stress
Stress due to dead load + live load + wind load ≤ 1.33 permissible stress.