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building materials

Building Materials | MCQ – 03 | 20 MCQs

Posted on June 30, 2021February 21, 2023 By Civil Vedant

Q.1) The drier in an oil paint should not be more than –

A) 5%

B) 10%

C) 15%

D) 20%

Answer

Option (B)

Q.2) The best primer used for structural steel work is :

A) White Lead

B) Red Lead

C) Zinc Oxide

D) Iron Oxide

Answer

Option (B)

Q.3) The vehicle used in bronze paints is usually :

A) Linseed Oil

B) Naptha

C) Water

D) Nitro-Cellulose Lacquer

Answer

Option (D)

Q.4) The commonly used cement in cement paints is :

A) White Cement

B) Portland Cement

C) Alumina Cement

D) Rapid Hardening Cement

Answer

Option (A)

Q.5) The solvent used in cement paints :

A) Thinner

B) Turpentine

C) Water

D) Spirit

Answer

Option (C)

Q.6) Enamel paint is made by adding :

A) White Lead in Varnish

B) Bitumen in Varnish

C) White Lead in Lacquer

D) Zinc White in Spirit

Answer

Option (A)

Q.7) Excess of silica in the clay –

A) Makes the brick brittle and weak

B) Makes the brick crack and warp on drying

C) Changes the colour of the brick from red to yellow

D) Improves impermeability and durability of the brick

Answer

Option (A)

Q.8) Gneiss is chemically classified as –

A) Calcareous rock

B) Argillaceous rock

C) Silicious rock

D) None of the above

Answer

Option (C)

Q.9) A good building stone should have water absorption capacity not more than –

A) 5%

B) 10%

C) 15%

D) 25%

Answer

Option (A)

Q.10) The specific gravity of stone should not, in any case be less than –

A) 1

B) 1.5

C) 2

D) 2.5

Answer

Option (D)

Q.11) Efflorescence is caused if –

A) The alkaline salt is present in the bricks

B) The clay used for making bricks contain pyrite

C) The water used for pugging the clay contains gypsum

D) All of the above

Answer

Option (D)

Q.12) The indentation marks left on bricks during process of moulding, are known as :

A) Fillets

B) Frogs

C) Projections

D) Marks

Answer

Option (B)

Q.13) The compressive strength of second class bricks should not be less than –

A) 7.5 MN/m2

B) 9 MN/m2

C) 10.5 MN/m2

D) 12 MN/m2

Answer

Option (A)

Q.14) Rich or Fat lime –

A) Slakes rapidly with considerable evolution of heat

B) Takes very long time to develop adequate strength

C) Has high plasticity

D) All of these

Answer

Option (D)

Q.15) The advantage of adding pozzolana (or surkhi) to lime is to –

A) Reduce shrinkage

B) Increase resistance to cracking

C) Increase resistance to chemical attack

D) All of these

Answer

Option (D)

Q.16) The main constituent of Portland Cement is :

A) Lime

B) Alumina

C) Iron oxide

D) Alkalies

Answer

Option (A)

Q.17) The rapid hardening Portland cement has :

A) Lower heat of hydration

B) Higher heat of hydration

C) Lower shrinkage coefficient

D) None of the above

Answer

Option (B)

Q.18) The fineness of cement is tested by –

A) Air-Permeability Test

B) Le-chatelier’s Method

C) Vicat’s Apparatus

D) None of the above

Answer

Option (A)

Q.19) The expansion of cement should not exceed……….for any type of Portland Cement.

A) 5 mm

B) 10 mm

C) 15 mm

D) 20 mm

Answer

Option (B)

Q.20) The workability of cement concrete can be improved by –

A) Increasing the quantity of cement

B) Increasing the proportion of coarse aggregate

C) Increasing the quantity of sand

D) All of the above

Answer

Option (A)

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