Here are 1000 MCQs on Design of Steel Structures (Chapterwise).
1. What is steel structure design?
a) Branch of structural engineering that deals with the design of steel structures
b) Branch of industrial engineering that deals with the design of steel structures
c) Branch of mechanical engineering that deals with the structural steel design
d) None of the mentioned
View Answer
Explanation: Steel design, or structural steel design, is a branch of structural engineering that deals with the design of steel structures. A steel structure is made up of structural members made of steel that have standard cross-sectional profiles, chemical compositions, and mechanical qualities.
2. Which of the following method is best for the design of steel structure?
a) Working Stress Method
b) Earthquake Load Method
c) Limit State Method
d) Ultimate Load Method
View Answer
Explanation: The limit state method is commonly used to design steel buildings and their components. When the limit state method isn’t feasible, the working stress method can be employed.
3. Which of the following is a type of steel structure design?
a) Continuous design
b) Simple design
c) Semi-continuous steel design
d) All of the mentioned
View Answer
Explanation: There are three different methods for the design of steel structures:
i) simple design
ii) continuous design
iii) semi-continuous steel design
4. Which of the following is added to steel to increase resistance to corrosion?
a) Copper
b) Carbon
c) Manganese
d) Sulphur
View Answer
Explanation: Addition of small quantity of copper increases resistance to corrosion. Even Chrome and Nickel are added to impart corrosion resistance property to steel.
5. Which of the following is a disadvantage of Steel?
a) High durability
b) Reusable
c) High strength per unit mass
d) Fire and corrosion resistance
View Answer
Explanation: Steel has high strength per unit mass, highly durable, and is reusable. But steel is poor in fire and corrosion resistance, it needs to be protected.
6. Which of the following is the property of high carbon steel?
a) reduced strength
b) high toughness
c) reduced ductility
d) high strength
View Answer
Explanation: High carbon steel contains high carbon content. Hence it has reduced ductility, toughness and weldability.
7. What is the minimum percentage of chromium and nickel added to stainless steel?
a) 10.5%, 0.5%
b) 0.5%, 10.5%
c) 30%, 50%
d) 2%, 20%
View Answer
Explanation: Stainless steel are low carbon steels to which a minimum of 10.5% chromium (maximum 20%) and 0.5% nickel is added.
8. High carbon steel is used in ______________
a) structural buildings
b) fire resistant buildings
c) for waterproofing
d) transmission lines and microwave towers
View Answer
Explanation: High carbon steel is used in transmission lines and microwave towers where relatively light members are joint by bolting.
9. Which method is mainly adopted for design of steel structures as per IS code?
a) Earthquake Load Method
b) Ultimate Load Method
c) Limit State Method
d) Working Stress Method
View Answer
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.
10. What is the net section area of steel plate 40cm wide and 10mm thick with one bolt if diameter of bolt hole is 18mm?
a) 38.2 cm2
b) 24 cm2
c) 578 mm2
d) 465 mm2
View Answer
Explanation: b = 40cm = 400mm, t = 10mm, dh = 18mm
Net section area = 400×10 – 16×10 = 3820mm2 = 38.2 cm2.
11. Which of the following relation is correct?
a) Design Strength = Ultimate strength / Partial factor of safety
b) Design Strength = Ultimate strength + Partial factor of safety
c) Design Strength = Ultimate strength * Partial factor of safety
d) Design Strength = Ultimate strength – Partial factor of safety
View Answer
Explanation: Design Strength = Ultimate strength / Partial factor of safety.
This partial safety factor accounts for possibility of unfavourable deviation of material strength from characteristic value, variation of member sizes, reduction in member strength due to fabrication and tolerances and uncertainty in calculation of strength of members.
12. Which of the following load is to be considered on liquid retaining structure?
a) dynamic load
b) earth pressure
c) hydrostatic load
d) wave and current load
View Answer
Explanation: Hydrostatic load is considered on liquid retaining structures or hydraulic structures. Wave and current load is considered in marine and offshore structure. Earth pressure is considered in basements, retaining walls, column footings, etc. Dynamic load is due to earthquakes and wind.
13. Which of the following factors does not influence earthquake resistance design?
a) strength of structure
b) site soil
c) geographical location of structure
d) wind of location
View Answer
Explanation: The factors which influence earthquake resistance design are : (i) geographical location of structure, (ii) site soil and foundation condition, (iii) importance of structure, (iv) dynamic characteristics of structure such as strength, stiffness, ductility and energy dissipation factor.
14. Which of the following load combination is not possible?
a) Dead load + imposed load
b) Dead load + wind load + earthquake load
c) Dead load + imposed load + wind load
d) Dead load + imposed load + earthquake load
View Answer
Explanation: According to IS code, it is assumed that maximum wind load and earthquake load will not occur simultaneously on a structure. The following combination of loads with appropriate partial safety factors may be considered : (i)Dead load + imposed load, (ii) Dead load + imposed load + earthquake load or wind load, (iii) Dead load + wind load or earthquake load, (iv) Dead load + erection load.
15. Which of the following is true about bracket connections?
a) They are used to give aesthetic appearance to the structure
b) These connections are used to accommodate less number of bolts
c) Fabrication cost is low
d) More rigid than any other connection
View Answer
Explanation: When the lever arm is to be extended to accommodate more number of bolts, bracket connection is used. The bracket type connection are more rigid than any other type of connection. But the fabrication cost is very high, so they are not adopted in general practice.
16. Proof stress for minimum bolt tension is :
a) 0.7fyb
b) 0.5fyb
c) 0.7fub
d) 0.5fub
View Answer
Explanation: Proof stress for minimum bolt tension is 0.7fub, where fub= ultimate tensile stress of bolt. Proof stress is an approximation for yield point for materials which do not have a definite one because of their structure.
17. Which of the following is not an assumption of first-order elastic analysis of rigid jointed frame?
a) member instability effects cannot be ignored
b) materials behave linearly
c) frame instability effects can be ignored
d) yielding effects can be ignored
View Answer
Explanation: The following are the assumptions of first-order elastic analysis of rigid jointed frame : (i) materials behave linearly, (ii) yielding effects can be ignored, (iii) member instability effects such as those caused by axial compression can be ignored, (iv) frame behaves linearly frame instability effects such as those caused by moments due to horizontal frame deflection, etc can be ignored.
18. Which of the following about rivet is correct?
a) labour cost is low
b) removing poorly installed rivet is costly
c) it does not require skilled work
d) causes low level of noise pollution
View Answer
Explanation: (i)Rivet connection is associated with high level of noise pollution, (ii)needs heating rivet to red hot, (iii)inspection of connection is skilled work, (iv) removing poorly installed rivet is costly, (v)labour cost is high.
19. Which of the following is advantage of HSFG bolts over bearing type bolts?
a) high strength fatigue
b) joints are not rigid
c) low static strength
d) bolts are subjected to shearing and bearing stresses
View Answer
Explanation: The advantages of HSFG bolts over bearing type bolts are : (i) joints are rigid, (ii) bolts are not subjected to shearing and bearing stresses as load transfer is mainly due to friction, (iii) high static strength due to high frictional resistance, (iv) high strength fatigue since nuts are prevented from loosening, (v)smaller number of bolts results into smaller number of gusset plates.
20. In which of the following cases pin connections are not used?
a) tall buildings
b) truss bridge girders
c) diagonal bracing connection
d) hinged arches
View Answer
Explanation: Pin connections are used in following cases : (i) truss bridge girders, (ii) hinged arches, (iii)tie rod connection in water tanks, (iv)as diagonal bracing connections in beams and columns, (v)chain-link cables suspension bridges.
21. Which of the following relation is correct?
a) Net area = Gross area / deductions
b) Net area = Gross area – deductions
c) Net area = Gross area * deductions
d) Net area = Gross area + deductions
View Answer
Explanation: Net area = Gross area – deductions, that is net area of tensile members is calculated by deducting areal of holes from the gross area.
22. Which of the following relation about plastic moment is correct?
a) Mp = Zp + fy
b) Mp = Zpfy
c) Mp = Zp – fy
d) Mp = Zp /fy
View Answer
Explanation: When every fibre of the section has a strain equal to or greater than εy=fy/Es , nominal moment strength is referred as plastic moment and is given by Mp = Zpfy , where Zp = ∫ydA is plastic section modulus and fy = yield stress.
23. Which of the following is true regarding plastic design methods?
a) moments produced by different loading conditions can be added together
b) lateral bracing requirements are less stringent than for elastic design
c) difficult to design for fatigue
d) more saving in column design
View Answer
Explanation: (i) There is little saving in column design, (ii) lateral bracing requirements are more stringent than for elastic design, (iii) difficult to design for fatigue,(iv) moments produced by different loading conditions needs to be calculated separately(cannot be added together) and the largest plastic moment is selected.
24. Among which of the following is the location of plastic hinge?
a) at centre for uniformly distributed load
b) at points away from concentrated load
c) at supports
d) at centre of beam
View Answer
Explanation: Plastic hinges normally occur at supports, points of concentrated load, and points where cross section change. The location of plastic hinge in a beam with uniformly distributed load is not well defined.
25. Which load is obtained when equilibrium and plasticity conditions of plastic analysis are satisfied?
a) no solution
b) plastic limit load
c) upper bound solution of true ultimate load
d) lower bound solution of true ultimate load
View Answer
Explanation: When equilibrium and plasticity conditions of plastic analysis are satisfied, an lower bound solution of true ultimate load is obtained.
26. Which of the following relation between load factor, collapse load(Wc) and working load (W)
a) F = W / Wc
b) F = Wc + W
c) F = Wc W
d) F = Wc / W
View Answer
Explanation: Load factor is ratio of collapse load to working load. It is represented by, F = Wc / W.
27. Which of the following factor is considered for classification of cross section?
a) length of member
b) location where member is used
c) seismic force
d) width-to-thickness ratio
View Answer
Explanation: Cross section are classified into four behavioural groups depending upon the material yield strength, width-to-thickness ratio of individual components (e.g. webs and flanges) within the cross section, and the loading arrangement.
28. Which of the following is true about torsional buckling?
a) failure occurs by bending about shear centre in longitudinal axis
b) failure occurs when torsional rigidity of member is greater than bending rigidity
c) standard hot rolled shapes are not susceptible to torsional buckling
d) it cannot occur with doubly symmetric cross section
View Answer
Explanation: In torsional buckling, failure occurs by twisting about shear centre in longitudinal axis. It occurs when torsional rigidity of member is appreciably smaller than bending rigidity. It can occur only with doubly symmetric cross section with very slender cross sectional elements. Standard hot rolled shapes are not susceptible to torsional buckling.
29. Which of the following is true about beam-column?
a) net end moments are zero
b) member subjected to axial force and bending moment
c) member subjected to bending moment
d) member subjected to axial force only
View Answer
Explanation: If the net end moments are not zero, the member will be subjected to axial force and bending moments along its length. Such members are called beam-columns.
30. Which of the following is not a load on columns in buildings?
a) load from walls
b) load from roofs
c) load from floors
d) load from foundation
View Answer
Explanation: Axial loading on columns in buildings is due to loads from roofs, floors, and walls transmitted to the column through beams and also due to its own self weight.
31. Which of the following is not a parameter for decrease in strength of slender member?
a) variation of material properties
b) seismic load
c) residual stress
d) initial lack of straightness
View Answer
Explanation: The decrease in strength of slender member is due to following parameter : imperfections- initial lack of straightness, accidental eccentricities of loading, residual stress, and variation of material properties over the cross section.
32. Which of the following is not a compression member?
a) tie
b) strut
c) rafter
d) boom
View Answer
Explanation: Strut, boom and rafter are compression members, whereas tie is a tension member.
33. What is the value of the imperfection factor for buckling class a?
a) 0.35
b) 0.73
c) 0.21
d) 0.23
View Answer
Explanation: The value of the imperfection factor, α for buckling class a is 0.21. The imperfection factor considers all the relevant defects in real structure when considering buckling, geometric imperfections, the eccentricity of applied loads, and residual stresses.
Chapterwise Multiple Choice Questions on Design of Steel Structures
- Materials, Structures and Specifications
- Basics of Structural Design
- Structural Analysis, Loading and Load Combinations
- Bolted Connections
- Welded Connections
- Design of Tension Members
- Plastic and Local Buckling Behaviour of Steel
- Design of Compression Members
- Design of Beams
- Gantry Girders, Design of Plate Girders & Industrial Buildings
1. Design of Steel Structures MCQ on Materials, Structures and Specifications
The section contains Design of Steel Structures multiple choice questions and answers on steel properties and types.
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2. Steel Structure Design Multiple Choice Questions on Basics of Structural Design
The section contains Design of Steel Structures questions and answers on limit state method, design considerations, analysis and methods.
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3. Design of Steel Structures MCQ on Structural Analysis, Loading and Load Combinations
The section contains Design of Steel Structures MCQs on characteristic loads, determination of earthquake and wind loads, load combinations, analysis methods and assumptions.
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4. Design of Steel Structures Multiple Choice Questions on Bolted Connections
The section contains Design of Steel Structures multiple choice questions and answers on riveted and bolted connections, pin and simple connections, moment resistance, beam to beam connections, beam and column splices.
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5. Design of Steel Structures MCQ on Welded Connections
The section contains Design of Steel Structures questions and answers on welding process, welding properties and types, weld defects, joints types, design specifications and welds design.
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6. Steel Structures Multiple Choice Questions on Design of Tension Members
The section contains Design of Steel Structures MCQs on tension members and its types, failure modes, slenderness ratio and displacement, tension members behavior and design, angles under tension, lug angles, splices and gusset plates.
7. Steel Structures Design MCQ on Plastic and Local Buckling Behaviour of Steel
The section contains Design of Steel Structures multiple choice questions and answers on plastic theory, plastic hinge, plastic design requirements, plastic analysis conditions, plastic collapse theorem and plastic analysis methods.
8. Design of Steel Structures Multiple Choice Questions on Compression Members Design
The section contains Design of Steel Structures questions and answers on compression members and its behavior, sections types, effective length and buckling of slender, lacings, battens, back to back connections and compression members design.
9. Design of Steel Structures MCQ on Beam Design
The section contains Design of Steel Structures MCQs on beams basics, types and sections, beams lateral stability, lateral torsional buckling, real beam behavior, laterally supported and unsupported beams design strength, beams shear strength, web buckling and crippling, beams deflections and holes, purlins, castellated beams and lintels.
10. Design of Steel Structures Multiple Choice Questions on Gantry Girders, Design of Plate Girders & Industrial Buildings
The section contains Design of Steel Structures multiple choice questions and answers on plate girders, general considerations, web and flanges proportioning, web panel subjected to shear, stiffeners, gantry girders and industrial buildings designs.
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Wish you the best in your endeavor to learn and master Design of Steel Structures!
