1. How many types of cracks can occur in a building? A. 3 B. 4 C. 2 D. 6 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C Solution: Non-moving and Moving are two types of cracks in buildings. Non-moving cracks are usually shallow and are the result of shrinkage. Moving crack are wider and are caused due to excessive stress in concrete.
2. Creep in concrete structure increases with: A. Increase in humidity B. Increase in water C. Decrease in temperature D. Decrease in humidity Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D Solution: Creep is small deformation that formed due to concrete loading which is caused due to increase in temperature and decrease in humidity
3. To control corrosion, concrete with _________ is used. A. Low permeability B. Low thermal coefficient C. More cement content D. More coarse aggregates Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A Solution: Less permeability leads to less chance of moisture, chemical absorption which is the factor for corrosion of steel bars.
4. The main reason for cracks in masonry joints is: A. Moisture B. Sulphate C. Magnesium D. Sodium Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B Solution: The main reason for cracks in masonry joints is Sulphate content. Cracks appear after 2-3 years of construction.
5. Shear cracks between the main wall and cross wall can be corrected using: A. Grouting B. Rebuilding C. Guining D. Toothing Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D Solution: Shear cracks appears due to poor bonding between main and cross wall. This can be corrected using toothing.
