There are no items in your cart
Add More
Add More
| Item Details | Price | ||
|---|---|---|---|
Q1. What is the function of a Column in a building?
Answer: A column is a vertical member that supports the loads transferred from the superstructure through beams and ultimately to the footing, which disperses the load to the ground.
Q2. When is the possibility of segregation of concrete more likely?
Answer: Segregation is more likely when:
a) The water-cement ratio is high,
b) The ratio of coarser aggregate is much more than the specified proportion,
c) Coarser grading is used.
Q3. What is the least cover provided for different RCC members?
Answer:
Footing – 50 mm
Column – 40 mm
Beam – 25 mm
Slab – 20 mm
Q4. What is the full form of TMT bar?
Answer: Thermo Mechanical Treatment. TMT bars are favoured for their high strength and corrosion resistance.
Q5. What do you mean by Honeycomb in Concrete?
Answer: Honeycomb refers to voids or air pockets in concrete.
Q6. What are Deflection and Deformation?
Answer: Deflection is a temporary displacement under load; deformation is a permanent change in shape.
Q7. What are the methods of curing?
Answer: Curing methods include:
a) Spraying,
b) Wet covering of a surface,
c) Ponding,
d) Application of curing compound,
e) Steam curing.
Q8. What is the formula for the weight of steel?
Answer: Weight (kg) = (D² × L) / 162, where D is the steel bar diameter in millimetres and L is the length in metres.
Q9. What is the difference between the working stress method and the limit state method?
Answer: The working stress method is an elastic design approach (designing within elastic limits), whereas the limit state method is a plastic design technique (allowing plastic behavior until failure).
Q10. What is Guniting?
Answer: Guniting is the process of spraying a cement-sand mixture (typically in a 1:3 ratio) on a surface using a cement gun under pressure (usually 2 to 3 kg/cm²), commonly used to repair damaged concrete surfaces.
Q11. What are the initial and final setting times of an ideal cement mix?
Answer: The initial setting time is around 30 minutes (90 minutes for masonry cement) and the final setting time should not exceed 10 hours (24 hours for masonry cement).
Q12. Does water damage concrete?
Answer: Plain concrete is resistant to water, but reinforced concrete (RCC) can suffer damage if water causes corrosion of the embedded steel reinforcement.
Q13. What are the cement, sand, and aggregate ratios for various grades of concrete mix?
Answer:
M10 – 1:3:6
M15 – 1:2:4
M20 – 1:1.5:3
M25 – 1:1:2
Q14. What field tests are required for quality check of cement?
Answer: Field tests include verifying color (grey with a light greenish shade), smooth texture, cool feel, and checking for lump-free powder. When thrown in water, cement should float briefly before sinking, and it should pass physical property assessments.
Q15. What is the function of sand in mortar?
Answer: Sand provides core strength, prevents excessive shrinkage, increases density, and ensures proper bonding between mortar and bricks.
Q16. What are the steps involved in building construction?
Answer: Key steps include:
Concreting,
Masonry work,
Plastering,
Flooring,
Formwork,
Steel cutting and bending.
Q17. What is the accuracy of a dumpy level's minimum reading?
Answer: A dumpy level can typically achieve an accuracy of up to 5 mm.
Q18. What is the size of a concrete cube used in testing?
Answer: 15 cm × 15 cm × 15 cm.
Q19. What do you do if a concrete cube fails in the 28-day compressive strength test?
Answer: Conduct a core test on the structure and report the findings to the higher authorities.
Q20. In residential buildings, what is the average stair width?
Answer: 900 mm.
Q21. The slope of a stair should not exceed:
Answer: 40º.
Q22. What is the minimum diameter of steel used in a column?
Answer: 12 mm.
Q23. What are the standard brick dimensions?
Answer: 19 cm × 9 cm × 9 cm.
Q24. What is the unit weight of RCC?
Answer: 2500 kg/m³.
Q25. One acre equals how many square feet?
Answer: 43,560 sq. ft.
Q26. What is the full form of UTM?
Answer: Universal Testing Machine.
Q27. Cement expires after how long?
Answer: 3 months.
Q28. One square meter equals how many square feet?
Answer: Approximately 10.76 sq. ft.
Q29. What is the unit weight of 25 mm steel bars?
Answer: 3.85 kg/m.
Q30. One hectare equals how many acres?
Answer: Approximately 2.47 acres.
Q31. One gallon equals how many litres?
Answer: Approximately 3.78 litres.
Q32. One kilonewton is equal to how many kilograms?
Answer: Approximately 101.97 kg.
Q33. One tonne equals how many kilograms?
Answer: 1000 kg.
Q34. What is the maximum free fall allowed for concrete?
Answer: 1.5 meters.
Q35. What is the minimum number of bars in a circular column?
Answer: 6 bars.
Q36. What is the full form of AAC?
Answer: Autoclaved Aerated Concrete.
Q37. What does NDT stand for?
Answer: Non-Destructive Testing.
Q38. What is the full form of JCB?
Answer: Joseph Cyril Bamford (referring to the company behind the construction equipment).
Q39. Which test is conducted to determine the bearing capacity of soil?
Answer: The Plate Load Test.
Q40. The ring and ball test is conducted on which material?
Answer: Bitumen.
Q41. What is the minimum hook length as per IS Code?
Answer: 75 mm.
Q44. What is the extra length in bent-up bars?
Answer: 0.45 times the bar diameter.
Q45. What is the least count of a dumpy level?
Answer: 5 mm.
Q46. What does EGL stand for?
Answer: Existing Ground Level.
Q47. A first class brick should absorb water more than what percentage?
Answer: 20%.
Q48. How many bricks are typically used in 1 cubic meter of brickwork?
Answer: Approximately 500 bricks.
Q49. What is the normal consistency of Portland Cement?
Answer: About 25%.
Q50. Which test is used to check the soundness of Portland Cement?
Answer: The Soundness Test.
Q51. According to IS Code, full strength of concrete is achieved after:
Answer: 28 days.
Q52. What is the volume of one bag of cement?
Answer: Approximately 0.035 m³.
Q53. What is the minimum grade of concrete used for RCC?
Answer: M20.
Q54. What is the full form of DPR?
Answer: Detailed Project Report.
Q55. According to UK gallon measurements, 1 gallon equals how many litres?
Answer: 4.54 litres.
Q56. In a one-way slab, along which span is the main bar provided?
Answer: Along the shorter span.
Q57. How can you measure the thickness of plaster?
Answer: By using a bull mark provided at a specified distance to ensure uniform plaster thickness.
Q58. In plastering, what is referred to as the second coat?
Answer: The floating coat.
Q59. What is the specific gravity range of Bentonite slurry during piling?
Answer: Between 1.05 and 1.12.
Q60. What is meant by the term "working load" in piling?
Answer: It is the load assigned to a pile as per the design.
Q61. What is the purpose of a Damp Proof Course?
Answer: To prevent moisture from rising up the wall from the ground.
Q62. According to IS 2911, piles of 600 mm or less in diameter are classified as small diameter piles, while piles greater than 600 mm are classified as large diameter piles.
Q63. What is a Friction Pile?
Answer: A friction pile supports the load primarily through friction along its surface.
Q64. How many cubic feet are in one bag of cement (50 KG)?
Answer: Approximately 1.225 cubic feet.
Q65. What are the factors affecting the strength of concrete?
Answer: Quality of raw materials, water-cement ratio, coarse-to-fine aggregate ratio, aggregate-to-cement ratio, curing period, temperature, and degree of compaction.
Q66. What is the density of ice?
Answer: Approximately 920 kg per cubic meter.
Q67. What is a one-way slab?
Answer: A slab where the ratio of the longer span to the shorter span is equal to or greater than 2.
Q68. What is a two-way slab?
Answer: A slab where the ratio of the longer span to the shorter span is less than 2.
Q69. What is Kentledge?
Answer: A dead weight used for applying a test load on a pile.
Q70. What are the reinforcement criteria for a beam?
Answer: According to IS 13920:2016 Clause 6.2.1, a beam shall have at least two 12 mm diameter bars at both the top and bottom.
Q71. By what percentage can water be increased for every additional 25 mm slump?
Answer: As per IS 10262:2009, a 3% increase is allowable for every additional 25 mm slump.
Q72. What is a Contour Line?
Answer: A line on a map joining points of equal elevation.
Q73. What is the least count of a theodolite?
Answer: It is the smallest measurement difference that can be read, determined by the difference between the smallest division on the main scale and the vernier scale.
Q74. What is the standard thickness of ceiling plaster?
Answer: 6 mm.
Q75. On which factors does the development length depend?
Answer: It depends primarily on the grade of concrete and the grade of steel.
Q76. What is the purpose of the Frog in a brick?
Answer: It helps in establishing a proper mortar joint between bricks.
Q77. Which type of steel is used in the manufacture of rails?
Answer: Manganese steel is typically used.
Q78. What type of cement is preferable for seawater construction?
Answer: Slag or Pozzolana cement (PSC or PPC) as per IS 456:2000, Clause 8.2.8.
Q79. What should be the pH of water used in concrete?
Answer: The pH should not be less than 6, as per IS 456:2000 Clause 5.4.2.
Q80. How do you convert N/mm² to kg/cm²?
Answer: Multiply by 10.197.
Q81. What is the minimum lap length taken in the compression zone?
Answer: Not less than 24 times the diameter (24ᶲ) of the bar, as per IS 456:2000 Clause 26.2.5.1(d).
Q82. When bars of two different diameters are to be lapped, the lap length is calculated based on which diameter?
Answer: It is calculated on the basis of the smaller diameter bar as per IS 456:2000 Clause 26.2.5.1(e).
Q83. When will side face reinforcement be provided in a beam?
Answer: When the web depth of the beam exceeds 750 mm, according to IS 456:2000 Clause 26.5.1.3.
Q84. What do you mean by 'Topographical Map'?
Answer: A map showing natural features such as rivers, hills, roads, railways, and populated areas.
Q85. What is the working principle of surveying?
Answer: It is based on the concept of working from the whole (overview) to the part (detail).
Q86. In chaining operations, who is termed the Leader and who is the Follower?
Answer: The chainman at the front (dragging the chain) is the Leader, and the one at the rear is the Follower.
Q87. What is the density of fire bricks?
Answer: Approximately 2400 kg/m³.
Q88. What is the minimum curing period for Mineral and Admixture added Cement?
Answer: 14 days.
Q89. What is the fundamental difference between Surveying and Levelling?
Answer: Surveying involves horizontal measurements, while levelling focuses on vertical differences.
Q90. Define 'Bored Cast In Situ' pile.
Answer: A bored cast-in-situ pile is formed by excavating a hole in the ground and filling it with concrete (reinforced if necessary) on-site; it is used when penetration to a predetermined depth is required.
Q91. How many ranging rods are required to range a line?
Answer: At least three for direct ranging; four are recommended for indirect ranging.
Q92. In plastering, what is known as the first coat?
Answer: The undercoat.
Q93. What is Bentonite?
Answer: A type of montmorillonite clay with a high liquid limit, used in slurry for piling.
Q94. What does M50 indicate?
Answer: “M” stands for mix, and M50 indicates that the concrete has a characteristic compressive strength of 50 N/mm² after 28 days of curing on a 150 mm cube.
Q95. What is the difference between Development Length and Lap Length?
Answer: Development length is the length required for a bar to develop its full strength in concrete, while lap length is the overlapping length used to transfer stress between two bars.
Q96. Which instrument is used to measure specific gravity?
Answer: A hydrometer.
Q97. What is the size of the mould used to measure the compressive strength of cement as per IS 10080:1982?
Answer: 70.6 mm × 70.6 mm × 70.6 mm.
Q98. What is the percentage strength gain of concrete over time?
Answer: Approximately:
16% after 1 day,
40% after 3 days,
65% after 7 days,
90% after 14 days,
99% after 28 days.
Q99. What is the use of a cover block?
Answer: It protects reinforcement from high temperatures during a fire and prevents corrosion.
Q100. What is the minimum height of a parapet wall?
Answer: (This answer may vary by code and design requirements – typically, codes suggest a minimum height around 1 meter for safety, but check regional standards.)
Fri Apr 11, 2025
Launch your Graphy
