Building Materials Objective Questions pdf – Set 06

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Q1. Which of the following is a rock?

(A) Quartz
(B) Mica
(C) Gypsum
(D) None of the above

Answer: (C) Gypsum

Q2. A bull nose brick is not used for

(A) Rounding off sharp corners
(B) Pillars
(C) Decoration purpose
(D) Arches

Answer: (D) Arches

Q3. Plywood is made by bonding together thin layers of wood in such a way that the angle between grains of any layer to grains of adjacent layers is

(A) 0°
(B) 30°
(C) 45°
(D) 90°

Answer: (D) 90°

Q4. The tendency of a stone is, to split along:

(A) Texture
(B) Fracture
(C) Cleavage
(D) Structure

Answer: (C) Cleavage

Q5. The most common admixture which is used to accelerate the initial set of concrete is

(A) Gypsum
(B) Calcium chloride
(C) Calcium carbonate
(D) None of the above

Answer: (B) Calcium chloride

Q6. According to IS 399-1963, the weight of the timber is specified at

(A) 8% moisture content
(B) 10% moisture content
(C) 12% moisture content
(D) 14% moisture content

Answer: (C) 12% moisture content

Q7. Which of the following stone is best suited for construction of piers and abutments of a railway bridge?

(A) Granite
(B) Sand stone
(C) Lime stone
(D) Quartzite

Answer: (A) Granite

Q8. Chlorite, a green colour mineral is mainly derived from the decomposition of

(A) Augite
(B) Biotite
(C) Hornblende
(D) All of these

Answer: (A) Augite

Q9. The internal size of mould used in brick preparation is

(A) Equal to the size of a fully burnt brick
(B) Smaller than the size of a fully burnt brick
(C) Greater than the size of a fully burnt brick
(D) None of the above

Answer: (C) Greater than the size of a fully burnt brick

Q10. Cast iron contains carbon approximately

(A) 1.5% to 5.5%
(B) 0.05% to 1.75%
(C) 0.250 %
(D) None to these

Answer: (A) 1.5% to 5.5%

Q11. The ultimate tensile strength of structural mild steel is about

(A) 160 N/mm²
(B) 260 N/mm²
(C) 420 N/mm²
(D) 520 N/mm²

Answer: (C) 420 N/mm²

Q12. Pick up the correct statement from the following:

(A) The free quartz suddenly expands at a temperature lower than 600°C
(B) The lime stone resists fire upto about 800°C and at higher temperature it splits into CaO and CO2
(C) The sand stone with silicates resist a fire in a better way
(D) All the above

Answer: (D) All the above

Q13. Which of the following trees yields hard wood?

(A) Deodar
(B) Chir
(C) Shishum
(D) Pine

Answer: (C) Shishum

Q14. Asbestos

(A) Is a natural fibrous mineral substance
(B) Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3)
(C) Contains iron oxide and alumina
(D) All the above

Answer: (D) All the above

Q15. Quick lime is

(A) Calcium carbonate
(B) Calcium oxide
(C) Calcium hydroxide
(D) None of the above

Answer: (B) Calcium oxide

Building Materials MCQ SET wise with Answers

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