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MCQOPTIONS
This section includes 53 Mcqs, each offering curated multiple-choice questions to sharpen your Design Steel Structures knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
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 x Partial factor of safety |
| Answer» D. Design Strength = Ultimate strength x Partial factor of safety | |
| 2. |
Which of the following factors is included in the limit state of serviceability? |
| A. | Brittle facture |
| B. | Fracture due to fatigue |
| C. | Failure by excessive deformation |
| D. | Deformation and deflection adversely affecting appearance or effective use of structure |
| Answer» E. | |
| 3. |
According to IS 456-2000, nominal cover for reinforcements in case of footings, under 'very severe' exposure: |
| A. | shall not be less than 30 mm |
| B. | shall not be less than 25 mm |
| C. | shall not be less than 50 mm |
| D. | shall not be less than 40 mm |
| Answer» D. shall not be less than 40 mm | |
| 4. |
According to IS 456–2000, which one of the following statements about the depth of neutral axis xu,bal for a balanced reinforced concrete section is correct? |
| A. | xu,bal depends on the grade of concrete only |
| B. | xu,bal depends on the grade of steel only |
| C. | xu,bal depends on both the grade of concrete and grade of steel |
| D. | xu,bal does not depend on the grade of concrete and grade of steel |
| Answer» C. xu,bal depends on both the grade of concrete and grade of steel | |
| 5. |
A Ready-mix concrete supplier supplied 101 cum of concrete for a slab. As per the minimum sampling frequency, the number of cube samples required are |
| A. | 5 |
| B. | 4 |
| C. | 7 |
| D. | 6 |
| E. | 3 |
| Answer» B. 4 | |
| 6. |
In the limit state design as per IS 456:2000, the shape of the compressive stress block of concrete is a combination of rectangular and: |
| A. | Elliptical Shape |
| B. | Parabolic Shape |
| C. | Trapezoidal Shape |
| D. | Circular Shape |
| Answer» C. Trapezoidal Shape | |
| 7. |
In limit state approach, spacing of main reinforcement controls primarily: |
| A. | Collapse |
| B. | Deflection |
| C. | Cracking |
| D. | Durability |
| Answer» D. Durability | |
| 8. |
As per IS 456:2000, the maximum strain in concrete at the outer most compression fiber in limit state of design for a flexural member is taken as: |
| A. | 0.0065 |
| B. | 0.005 |
| C. | 0.0035 |
| D. | 0.002 |
| Answer» D. 0.002 | |
| 9. |
According to IS 456 (2000), the characteristic strength of concrete is defined as the strength of material below which not more than X percent of the test results are expected to fall. The value of X is |
| A. | 0.75 |
| B. | 0.05 |
| C. | 10 |
| D. | 7.5 |
| E. | 5 |
| Answer» F. | |
| 10. |
According to IS 456 (2000), the recommended slump (in mm) range for in-situ piling using concrete is |
| A. | 25 - 75 |
| B. | 100 - 150 |
| C. | 50 - 100 |
| D. | 75 - 100 |
| E. | 200+ |
| Answer» C. 50 - 100 | |
| 11. |
As per IS 456-2000, the limiting value of the depth of neutral axis (Xumax/d) for fe415 grade steel is: |
| A. | 0.46 |
| B. | 0.48 |
| C. | 0.53 |
| D. | 0.39 |
| Answer» C. 0.53 | |
| 12. |
In limit state design, under – reinforced section is one in which |
| A. | Tensile strain in steel reaches yield value while maximum compressive strain in concrete is less than its ultimate crushing strain. |
| B. | Maximum tensile stress in steel reaches its permissible value while maximum compressive stress in concrete is less than its permissible value. |
| C. | Maximum compressive strain in concrete reaches the ultimate crushing value while tensile strain in steel is less than its yield value. |
| D. | Maximum compressive stress in concrete reaches its permissible value while tensile stress in steel is less than its permissible value. |
| Answer» B. Maximum tensile stress in steel reaches its permissible value while maximum compressive stress in concrete is less than its permissible value. | |
| 13. |
According to the limit state method, neutral axis is said to be critical when |
| A. | All of the above |
| B. | Strain in steel reaches its ultimate value earlier than strain in concrete |
| C. | Strain in steel and strain in concrete reach their ultimate value simultaneously |
| D. | Strain in concrete reaches its ultimate value earlier than strain in steel |
| Answer» D. Strain in concrete reaches its ultimate value earlier than strain in steel | |
| 14. |
Match list A with list B and select the correct answer using the codes given below the list.List - AList - BA. Minimum cover1. Ultimate moment capacityB. Span to depth ratio2. DurabilityC. Limit state design3. ServiceabilityD. Doubly reinforced section4. Reduction in sectional depth |
| A. | A - 3, B - 2, C - 1, D - 4 |
| B. | A - 2, B - 3, C - 4, D - 1 |
| C. | A - 3, B - 2, C - 4, D - 1 |
| D. | A - 2, B - 3, C - 1, D - 4 |
| Answer» E. | |
| 15. |
As per IS 456, the minimum cement content for the respective durability classes can be reduced by R kg/cum while changing the maximum size of aggregate from 20 mm to 40 mm, wherein R is |
| A. | 10 |
| B. | 15 |
| C. | 20 |
| D. | 25 |
| E. | 30 |
| Answer» F. | |
| 16. |
In Ultimate Load Method, the load used in the design of R.C.C. structures refer to. |
| A. | total collapse load |
| B. | working load multiplied by a load factor |
| C. | working load divided by a load factor |
| D. | plastic load |
| Answer» C. working load divided by a load factor | |
| 17. |
In limit state design, partial safety factors are applied to |
| A. | Loads |
| B. | Material stresses |
| C. | Both loads and material stresses |
| D. | Size of structural member |
| Answer» D. Size of structural member | |
| 18. |
Flexural strength (fcr in N/mm2) of concrete is computed by |
| A. | 5000√fck |
| B. | 7000√fck |
| C. | 0.7√fck |
| D. | 0.5√fck |
| Answer» D. 0.5√fck | |
| 19. |
According IS 456-2000, the nominal cover provided for the concrete surfaces exposed to very severe environmental conditions shall NOT be less than: |
| A. | 75 mm |
| B. | 30 mm |
| C. | 50 mm |
| D. | 45 mm |
| Answer» D. 45 mm | |
| 20. |
For construction of buildings in seismic prone areas, the structural engineer should refer which of the following codes along with IS 456? |
| A. | 13920-1994 |
| B. | 13910-1993 |
| C. | 13910-1994 |
| D. | 13920-1993 |
| Answer» E. | |
| 21. |
As per IS 456, nominal mix concrete may be used for concrete of grades upto |
| A. | 7.5 MPa |
| B. | 10 MPa |
| C. | 15 MPa |
| D. | 20 MPa |
| E. | 25 MPa |
| Answer» E. 25 MPa | |
| 22. |
As per IS 456: 2000, The tensile strength of concrete of grade M25 according to the 'limit state method' is: |
| A. | 3.0 N/mm2 |
| B. | 3.5 N/mm2 |
| C. | 5.0 N/mm2 |
| D. | 2.5 N/mm2 |
| Answer» C. 5.0 N/mm2 | |
| 23. |
According to IS 456-2000, the exposure condition of concrete surfaces to coastal environment completely is classified as: |
| A. | Moderate |
| B. | Severe |
| C. | Extreme |
| D. | Very severe |
| Answer» C. Extreme | |
| 24. |
In limit state method, the failure criterion for reinforced concrete beam and column is Based on |
| A. | Maximum principle stress theory |
| B. | Maximum principle strain theory |
| C. | Maximum shear stress theory |
| D. | Maximum normal stress theory |
| Answer» C. Maximum shear stress theory | |
| 25. |
For a structural element in steel structure, which of the following is a limit state of strength? |
| A. | Durability |
| B. | Torsion |
| C. | Fire |
| D. | Deflection |
| Answer» C. Fire | |
| 26. |
According to IS 1641, the fire resistance of an RCC structural elementis expressed in terms of |
| A. | Strength in N/mm2 |
| B. | Temperature in deg. Celsius |
| C. | Time in hours |
| D. | Deformation in mm |
| Answer» D. Deformation in mm | |
| 27. |
According to Witney's theory, the maximum depth of concrete stress block in a balanced RCC beam section of depth 'd' is ________. |
| A. | 0.3 d |
| B. | 0.43 d |
| C. | 0.5 d |
| D. | 0.53 d |
| Answer» E. | |
| 28. |
As per IS 456-2000, the minimum grade of concrete used for severe exposure condition should be: |
| A. | M10 |
| B. | M30 |
| C. | M25 |
| D. | M20 |
| Answer» E. | |
| 29. |
As per IS456-2000, the basic value for span to depth ratio for cantilever beam up to 10m is______. |
| A. | 26 |
| B. | 7 |
| C. | 17 |
| D. | 20 |
| Answer» C. 17 | |
| 30. |
Calculate the target mean compressive strength at 28 days curing, for M20 grade concrete, as per IS 10262-2009 (take standard deviation as 4 N / mm2). |
| A. | 26.6 N / mm2 |
| B. | 20.0 N / mm2 |
| C. | 22.4 N / mm2 |
| D. | 28.7 N / mm2 |
| Answer» B. 20.0 N / mm2 | |
| 31. |
A cantilever beam of size 300 mm × 550 mm with 3 bars of 12 mm diameter in tension zone, has a span of 3 m, adopt M20 concrete and Fe500 grade steel. The depth of neutral axis is ______(assume clear cover as 25 mm). |
| A. | 68.27 mm |
| B. | 259.5 mm |
| C. | 415 mm |
| D. | 121.5 mm |
| Answer» B. 259.5 mm | |
| 32. |
As per IS 456, the weighing or batching accuracy (±) of cement, aggregates, water and admixture shall respectively be |
| A. | 2, 2, 2, 2 |
| B. | 2, 3, 3, 3 |
| C. | 2, 3, 2, 3 |
| D. | 2, 2, 3, 3 |
| E. | 3, 2, 2, 2 |
| Answer» C. 2, 3, 2, 3 | |
| 33. |
In limit state design, the limiting depth of neutral axis for Fe-500 for beam having effective depth “‘d” is |
| A. | 0.47d |
| B. | 0.53d |
| C. | 0.46d |
| D. | 0.58d |
| Answer» D. 0.58d | |
| 34. |
As recommended in IS 456 match the following according to the Recommended slumps for various concrete works and select the correct answer using codes as given below.Type of constructionRecommended slump in mm (maximum)Pavements75Unreinforced footings50Reinforced foundations100Columns125 |
| A. | (A) - (I), (B) - (II), (C) - (III), (D) - (IV) |
| B. | (A) - (II), (B) - (I), (C) - (III), (D) - (IV) |
| C. | (A) - (IV), (B) - (II), (C) - (III), (D) - (I) |
| D. | (A) - (I), (B) - (III), (C) - (II), (D) - (IV) |
| Answer» C. (A) - (IV), (B) - (II), (C) - (III), (D) - (I) | |
| 35. |
In limit state of serviceability, the partial safety factor for wind load is taken as |
| A. | 1.0 |
| B. | 1.15 |
| C. | 1.5 |
| D. | 0.9 |
| Answer» B. 1.15 | |
| 36. |
Let the characteristic strength be defined as that value, below which not more than 50% of the results are expected to fall. Assuming a standard deviation of 4 MPa, the target mean strength (in MPa) to be considered in the mix design of a M25 concrete would be |
| A. | 18.42 |
| B. | 21.00 |
| C. | 25.00 |
| D. | 31.58 |
| Answer» D. 31.58 | |
| 37. |
In limit state design, the values of consideration of factor of safety for concrete and steel, respectively, in limit state design are: |
| A. | 1.50 and 1.17 |
| B. | 2.00 and 1.70 |
| C. | 1.50 and 1.15 |
| D. | 1.50 and 1.50 |
| Answer» D. 1.50 and 1.50 | |
| 38. |
In RCC work, which steel is used? |
| A. | Hard carbon steel |
| B. | Mild steel |
| C. | Stainless Steel |
| D. | wrought steel |
| Answer» C. Stainless Steel | |
| 39. |
As per IS 456:2000, Minimum grade of concrete for plain concrete exposed to sea coast is |
| A. | M20 |
| B. | M30 |
| C. | M40 |
| D. | M25 |
| Answer» B. M30 | |
| 40. |
In the case of designing a water tank with Limit State Method, to control the cracking, the maximum stress in HYSD steel bars should not exceed: |
| A. | 115 MPa |
| B. | 125 MPa |
| C. | 130 MPa |
| D. | 150 MPa |
| Answer» D. 150 MPa | |
| 41. |
In limit state design approach, the spacing of main reinforcement primarily takes care of |
| A. | Durability |
| B. | Corrosion |
| C. | Deflection |
| D. | Cracking |
| E. | Spalling |
| Answer» E. Spalling | |
| 42. |
As per IS 456, using limit state design method, in members where cracking in tensile zone is harmful because they are continuously exposed to ground water, the limiting crackwidth suggested is |
| A. | 0.3 mm |
| B. | 0.15 mm |
| C. | 0.25 mm |
| D. | 0.2 mm |
| E. | 0.02 mm |
| Answer» E. 0.02 mm | |
| 43. |
In limit state design method, the limiting values of the depth of neutral axis for Fe 415 steel is given by which of the following equations? |
| A. | 0.53 d |
| B. | 0.48 d |
| C. | 0.46 d |
| D. | 0.36 d |
| Answer» C. 0.46 d | |
| 44. |
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 x Partial factor of safety |
| Answer» D. Design Strength = Ultimate strength x Partial factor of safety | |
| 45. |
The partial factor of safety for resistance governed by yielding is :$ |
| A. | 1.10 |
| B. | 1.5 |
| C. | 2.0 |
| D. | 1.25 |
| Answer» B. 1.5 | |
| 46. |
Which_of_the_following_criteria_is_to_be_satisfied_in_selection_of_member_in_limit_state_method?$ |
| A. | Factored Load > Factored Strength |
| B. | Factored Load ≤ Factored Strength |
| C. | Factored Load ‚â• Factored Strength |
| D. | Sometimes Factored Load < Factored Strength (or) Factored Load > Factored Strength |
| Answer» C. Factored Load ‚Äö√Ñ√∂‚àö¬¢‚Äö√Ѭ¢ Factored Strength | |
| 47. |
The_partial_factor_of_safety_for_resistance_governed_by_ultimate_strength_is_: |
| A. | 1.10 |
| B. | 1.5 |
| C. | 2.0 |
| D. | 1.25 |
| Answer» E. | |
| 48. |
What is variable action according to classification of actions by IS code? |
| A. | due to self weight |
| B. | due to accidents |
| C. | due to construction and service stage loads |
| D. | due to earthquake loads |
| Answer» D. due to earthquake loads | |
| 49. |
What is permanent action according to classification of actions by IS code? |
| A. | due to self weight |
| B. | due to construction and service stage loads |
| C. | due to accidents |
| D. | due to earthquake loads |
| Answer» B. due to construction and service stage loads | |
| 50. |
Which of the following factors is included in the limit state of strength? |
| A. | Fire |
| B. | Failure by excessive deformation |
| C. | Corrosion |
| D. | Repairable damage or crack due to fatigue |
| Answer» C. Corrosion | |