Building Materials Viva Questions – Set 08

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Q1. Compared to mild steel, cast iron has
(i) High compressive strength
(ii) High tensile strength
(iii) Low compressive strength
(iv) Low tensile strength
The correct answer is

(A) (i) and (ii)
(B) (ii) and (iii)
(C) (iii) and (iv)
(D) (i)and(iv)

Answer: (D) (i)and(iv)

Q2. Resins are

(A) Not soluble in water
(B) Soluble in spirit
(C) Used in varnishes
(D) Left behind on evaporation of oil

Answer: (C) Used in varnishes

Q3. A first class brick when immersed in cold water for 24 hours should not absorb water more than

(A) 15 %
(B) 20 %
(C) 22 %
(D) 25 %

Answer:(B) 20 %

Q4. In a mortar, the binding material is

(A) Cement
(B) Sand
(C) Surkhi (brick-dust)
(D) Cinder

Answer: (A) Cement

Q5. Quick lime is
(i) Slow in setting
(ii) Rapid in slacking
(iii) Good in strength
The correct answer is

(A) Only (i)
(B) Only (ii)
(C) Both (i) and (ii)
(D) Both (ii) and (iii)

Answer: (C) Both (i) and (ii)

Q6. The minimum compressive strength of 2nd class bricks should be

(A) 75 kg/cm2
(B) 90 kg/cm2
(C) 100 kg/cm2
(D) 120 kg/cm2

Answer: (A) 75 kg/cm2

Q7. The vehicle used in case of enamel paints is usually

(A) Linseed oil
(B) Water
(C) Varnish
(D) None of the above

Answer: (C) Varnish

Q8. Pick up the correct statement from the following:

(A) Soft stones are required for carving
(B) Light stones are required for arches
(C) Hard stones are required to stand high pressure
(D) All the above

Answer: (D) All the above

Q9. Which of the following bricks are used for lining of furnaces?

(A) Over-burnt bricks
(B) Under-burnt bricks
(C) Refractory bricks
(D) First class bricks

Answer: (C) Refractory bricks

Q10. In the method of condensation polymerization,

(A) Low-molecular substances are removed from the high molecular substance
(B) The reaction proceeds with an evolution of ammonia
(C) The reaction proceeds with an evolution of hydrogen chloride
(D) All of the above

Answer: (D) All of the above

Q11. As per IS specifications, the maximum final setting time for ordinary Portland cement should be

(A) 30 minutes
(B) 1 hour
(C) 6 hours
(D) 10 hours

Answer: (D) 10 hours

Q12. Bulking of sand is caused due to

(A) Surface moisture
(B) Air voids
(C) Viscosity
(D) Clay contents

Answer: (A) Surface moisture

Q13. The slenderness ratio for masonry walls should not be more than

(A) 10
(B) 20
(C) 30
(D) 40

Answer: (B) 20

Q14. Shingle is

(A) Decomposed laterite
(B) Crushed granite
(C) Water bound pebbles
(D) Air weathered rock

Answer: (A) Decomposed laterite

Q15. According to IS specifications, the compressive strength of ordinary Portland cement after three days should not be less than

(A) 7 MPa
(B) 11.5 MPa
(C) 16 MPa
(D) 21 MPa

Answer:(C) 16 MPa

Building Materials MCQ with Answers

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