Building Materials Viva Questions - Set 08 - ObjectiveBooks
Building Materials Viva Questions - Set 08

Building Materials Viva Questions - Set 08

Practice Test: Question Set - 08

1. Specific gravity for most of the building stones lies between
    (A) 1.5 to 2.0
    (B) 2.0 to 2.5
    (C) 2.5 to 3.0
    (D) 3.0 to 3.5
2. Initial setting time of cement for asbestos cement products should be not less than
    (A) 30 minutes
    (B) 50 minutes
    (C) 75 minutes
    (D) 90 minutes
3. The age of a tree can be known by examining
    (A) Cambium layer
    (B) Annular rings
    (C) Medullary rays
    (D) Heart wood
4. Pick up the correct statement from the following:
    (A) In basic Bessemer process, the steel heats the converter
    (B) In open-hearth process, the furnace heats the steel
    (C) In Siemens process, the impurities of pig iron are oxidized by the oxygen of the ore
    (D) All the above
5. Percentage of silica in a good brick earth lies between
    (A) 5 to 10 %
    (B) 20 to 30 %
    (C) 50 to 60 %
    (D) 70 to 80 %
6. Resins are
    (A) Not soluble in water
    (B) Soluble in spirit
    (C) Used in varnishes
    (D) Left behind on evaporation of oil
7. 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)
8. 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
9. 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
10. Shingle is
    (A) Decomposed laterite
    (B) Crushed granite
    (C) Water bound pebbles
    (D) Air weathered rock
11. Proper amount of entrained air in concrete results in
     (i) Better workability
     (ii) Better resistance to freezing and thawing
     (iii) Lesser workability
     (iv) Less resistance to freezing and thawing
     The correct answer is
    (A) (i) and (ii)
    (B) (i) and (iv)
    (C) (ii) and (iii)
    (D) (iii) and (iv)
12. Pick up the correct statement from the following: Method of sawing timber
    (A) Tangentially to annual rings, is known as tangential method
    (B) In four quarters such that each board cuts annual rings at angles not less than 45°, is known as quarter sawing method
    (C) Cut out of quarter logs, parallel to the medullary rays and perpendicular to annual rings, is known as radial sawing
    (D) All the above
13. Assertion A : Paints with white lead base are not recommended for painting of iron works.
Reason R : Paints with white lead base do not check rusting of iron.
Select your answer according to the coding system given below:
    (A) Both A and R is true and, R is the correct explanation of A
    (B) Both A and R is true but R is not the correct explanation of A
    (C) A is true but R is false
    (D) A is false but R is true
14. Pick up the correct statement from the following:
    (A) Alexander Parkes, a Scottish chemist prepared a hard material by mixing camphor and alcohol with nitro cellulose and called it, as Parkesite
    (B) Dr. L. Bakeland, a Belgian scientist prepared a product known as Bakelite
    (C) Pollark, an Austrian scientist prepared a substance from urea and formaldehyde and called it Plastic
    (D) All the above
15. Expansion Joints in masonry walls are provided in wall lengths usater than
    (A) 10 m
    (B) 20 m
    (C) 30 m
    (D) 40 m
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