Building Materials MCQ – Set 29

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Q1. The operation of removal of impurities or clay adhering to iron ores, is known as

(A) Dressing
(B) Calcination
(C) Roasting
(D) Smelting

Answer: (A) Dressing

Q2. Plastic bitumen is generally used for

(A) Road pavements
(B) Expansion joints
(C) Crack fillings
(D) None to these

Answer: (C) Crack fillings

Q3. A ferrous metal is

(A) Cast iron
(B) Wrought iron
(C) Steel
(D) All the above

Answer: (D) All the above

Q4. For lime concrete,

(A) Slump is 50 to 75 mm
(B) Flexural strength at 90 days is 0.2 N/mm2
(C) Compressive strength at 90 days is 1.5 N/mm2
(D) All the above

Answer: (D) All the above

Q5. Dry rot

(A) Cracks the timber
(B) Reduces the strength of timber
(C) Reduces the timber to powder
(D) Spoils the appearance of timber

Answer: (C) Reduces the timber to powder

Q6. Asbestos is

(A) Corrugated sheet used for roofing
(B) An incombustible fire proof material
(C) An organic substance
(D) All the above

Answer: (D) All the above

Q7. For making fly-ash building bricks, the following mix of fly-ash, sand and lime, is

(A) 80 : 13 : 7
(B) 70 : 20 : 10
(C) 60 : 35 : 5
(D) None of these

Answer: (A) 80 : 13 : 7

Q8. The material generally not used as extender in paints, is

(A) Powdered silica
(B) Gypsum
(C) Talc
(D) Zinc white

Answer: (D) Zinc white

Q9. Pozzolana (or surkhi) is used in lime

(A) To impart hydraulicity
(B) To prevent shrinkage
(C) To decrease the cost of construction
(D) To decrease the setting time

Answer: (A) To impart hydraulicity

Q10. The rocks which are formed due to pouring of magma at the earth’s surface are called

(A) Plutonic rocks
(B) Hypabyssal rocks
(C) Volcanic rocks
(D) Igneous rocks

Answer:(C) Volcanic rocks

Q11. Water paint is a

(A) White wash
(B) Color wash
(C) Whiting
(D) All the above

Answer: (D) All the above

Q12. Pick up the non-inflammable plastic from the following:

(A) Cellulose acetate plastics
(B) Polyvinyl chloride plastics
(C) Phenol formaldehyde plastic
(D) Urea formaldehyde plastic

Answer: (B) Polyvinyl chloride plastics

Q13. The size of modular bricks, is

(A) 10 × 10 × 9 cm
(B) 19 × 9 × 9 cm
(C) 22.5 × 10 × 8.5 cm
(D) 22.5 × 8.0 × 9 cm

Answer: (B) 19 × 9 × 9 cm

Q14. Invar contains

(A) 12% of nickel
(B) 24% of nickel
(C) 30% of nickel
(D) 36% of nickel

Answer: (D) 36% of nickel

Q15. For light and ornamental casting, the most unsuitable pig iron, is

(A) Bessemer pig
(B) Grey or foundry pig
(C) White or forge pig
(D) Mottled pig

Answer: (D) Mottled pig

Building Materials MCQ SET wise with Answers

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