1. What is the main ingredient used in the manufacture of Portland cement?
A. Clay
B. Lime
C. Gypsum
D. Sand
Answer: B) Lime
Rationale: The primary ingredient in the manufacture of Portland cement is lime (CaO), which is
obtained from limestone. Other ingredients like clay are mixed in to create the desired chemical
composition.
2. Which of the following is the main function of a plinth in construction?
A. To provide aesthetic appeal
B. To prevent moisture entry into the building
C. To support the roof
D. To provide space for utilities
Answer: B) To prevent moisture entry into the building
Rationale: The plinth is the portion of a building that elevates the structure above ground level,
preventing moisture from entering the building and protecting it from dampness.
,3. What is the compressive strength of concrete measured in?
A. MPa (Mega Pascal)
B. KPa (Kilo Pascal)
C. N/mm² (Newton per square millimeter)
D. All of the above
Answer: D) All of the above
Rationale: Concrete's compressive strength can be measured in multiple units, including MPa,
KPa, and N/mm², depending on the region and standard used.
4. Which of the following is the most common type of brick used in construction?
A. Fly ash brick
B. Clay brick
C. Concrete brick
D. Calcium silicate brick
Answer: B) Clay brick
Rationale: Clay bricks are the most commonly used type of bricks in construction due to their
availability, cost-effectiveness, and strength. They have been used for centuries.
5. What is the main use of gypsum in construction?
A. Insulation
B. Fire protection
, C. Strengthening concrete
D. Waterproofing
Answer: B) Fire protection
Rationale: Gypsum is primarily used in construction for fire protection due to its fire-resistant
properties. It is commonly used in drywall (plasterboard) and as a fire-retardant material.
6. The ratio of cement, sand, and aggregate in a standard concrete mix (1:2:4) refers to:
A. Weight
B. Volume
C. Quantity
D. None of the above
Answer: B) Volume
Rationale: The mix ratio (1:2:4) refers to the volume of materials. This means 1 part of cement, 2
parts of sand, and 4 parts of coarse aggregate are used in the mix.
7. Which material is commonly used for the foundation of a building?
A. Steel
B. Concrete
C. Wood
D. Aluminum
Answer: B) Concrete
A. Clay
B. Lime
C. Gypsum
D. Sand
Answer: B) Lime
Rationale: The primary ingredient in the manufacture of Portland cement is lime (CaO), which is
obtained from limestone. Other ingredients like clay are mixed in to create the desired chemical
composition.
2. Which of the following is the main function of a plinth in construction?
A. To provide aesthetic appeal
B. To prevent moisture entry into the building
C. To support the roof
D. To provide space for utilities
Answer: B) To prevent moisture entry into the building
Rationale: The plinth is the portion of a building that elevates the structure above ground level,
preventing moisture from entering the building and protecting it from dampness.
,3. What is the compressive strength of concrete measured in?
A. MPa (Mega Pascal)
B. KPa (Kilo Pascal)
C. N/mm² (Newton per square millimeter)
D. All of the above
Answer: D) All of the above
Rationale: Concrete's compressive strength can be measured in multiple units, including MPa,
KPa, and N/mm², depending on the region and standard used.
4. Which of the following is the most common type of brick used in construction?
A. Fly ash brick
B. Clay brick
C. Concrete brick
D. Calcium silicate brick
Answer: B) Clay brick
Rationale: Clay bricks are the most commonly used type of bricks in construction due to their
availability, cost-effectiveness, and strength. They have been used for centuries.
5. What is the main use of gypsum in construction?
A. Insulation
B. Fire protection
, C. Strengthening concrete
D. Waterproofing
Answer: B) Fire protection
Rationale: Gypsum is primarily used in construction for fire protection due to its fire-resistant
properties. It is commonly used in drywall (plasterboard) and as a fire-retardant material.
6. The ratio of cement, sand, and aggregate in a standard concrete mix (1:2:4) refers to:
A. Weight
B. Volume
C. Quantity
D. None of the above
Answer: B) Volume
Rationale: The mix ratio (1:2:4) refers to the volume of materials. This means 1 part of cement, 2
parts of sand, and 4 parts of coarse aggregate are used in the mix.
7. Which material is commonly used for the foundation of a building?
A. Steel
B. Concrete
C. Wood
D. Aluminum
Answer: B) Concrete
