Building Materials 1000+ MCQ with answer for NDA

1. According to ISI, bitumen is classified into
A. 2 grades
B. 4 grades
C. 8 grades
D. 10 grades
Answer : D

2. Refractory bricks are used for
A. Retaining walls
B. Columns
C. Piers
D. Combustion chambers
Answer : D

3. Mastic asphalt is normally used for
A. Sound insulation
B. Water proofing
C. Fire proofing
D. None to these
Answer : B

4. The compound of Portland cement which contributes to the strength after two to three years is
A. Tri-calcium silicate
B. Di-calcium silicate
C. Tri-calcium aluminate
D. Tetra-calcium alumino ferrite
Answer : B

5. Second class bricks
A. Are of dark brown colour
B. Produce a metallic sound when struck
C. Are well burnt
D. Are under burnt
Answer : B

6. Addition of pozzolana to ordinary Portland cement increases
A. Bleeding
B. Shrinkage
C. Permeability
D. Heat of hydration
Answer : B

7. Lime concrete is generally used for
A. Wall foundations
B. Flooring at ground level
C. Both (A) and (B)
D. Neither (A) nor (B)
Answer : B

8. Age of a tree may be ascertained by
A. Radius of its stem
B. Circumference of its stem
C. Number of branches
D. Number of annual rings
Answer : D

9. Seasoning of timber is essential to remove
A. Knots from timber
B. Sap from timber
C. Twisted fibre from timber
D. Roughness of timber
Answer : B

10. Pug mill is used for
A. Preparation of clay
B. Moulding of clay
C. Drying of bricks
D. Burning of bricks
Answer : A

11. The lime which contains high percentage of calcium oxide, is generally called
A. Fat lime
B. Rich lime
C. White lime
D. None of these
Answer : D

12. Lime stone is not a
A. Sedimentary rock
B. Stratified rock
C. Aqueous rock
D. Metamorphic rock
Answer : D

13. Pick up the constituent of good brick earth whose excess causes the raw bricks shrink and warp during drying and burning, from the following:
A. Alumina
B. Lime
C. Iron-oxide
D. Magnesia
Answer : A

14. Strength of cement concrete primarily depends upon
A. Quality of water
B. Quantity of aggregate
C. Quantity of cement
D. Water-cement ratio
Answer : D

15. The term frog means
A. An apparatus to lift the stone
B. A depression on a face of brick
C. Vertical joint in a brick work
D. Soaking brick in water
Answer : B

16. The rocks formed by gradual deposition, are called
A. Sedimentary rocks
B. Igneous rocks
C. Metamorphic rocks
D. None of these
Answer : A

17. The sequence of refractory materials according to increasing melting points is:
A. Dolomite, Magnesia, Bauxite, Chromites
B. Bauxite, Chromites, Dolomite, Magnesia
C. Magnesia, Bauxite, Dolomite, Chromites
D. None of these
Answer : B

18. Portland cement manufactured from pure white chalk and clay but free from iron-oxide, is known as
A. Quick setting cement
B. Rapid hardening cement
C. White cement
D. Low heat Portland cement
Answer : C

19. The foliated structure is very common in
A. Sedimentary rocks
B. Igneous rocks
C. Metamorphic rocks
D. None of these
Answer : C

20. Laterite is a/an
A. Volcanic rock
B. Argillaceous rock
C. Calcareous rock
D. Siliceous rock
Answer : B

21. The pressure acting on the stones in stone masonry construction should be
A. Along the direction of bedding planes
B. At 45° to the direction of bedding planes
C. At 60° to the direction of bedding planes
D. Perpendicular to the direction of bedding planes
Answer : D

22. Bulking of sand is caused due to
A. Surface moisture
B. Air voids
C. Viscosity
D. Clay contents
Answer : A

23. Pick up the correct statement from the following:
A. Catalysts are added to assist and accelerate the hardening of resin
B. The fillers are inert materials and they impart strength and hardness
C. Fibrous fillers increase thermal resistance
D. All the above
Answer : D

24. Mastic asphalt is
A. Water proof
B. Fire proof
C. Elastic
D. All the above
Answer : D

25. Assertion A : Pure lime takes a long time to develop adequate strength. Reason R : Pure lime has slow hardening characteristics. Select your answer according to the coding system given below:
A. Both A and R is true and R is correct explanation of A
B. Both A and R is true and R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true
Answer : A

26. Pick up the plutonic rock from the following:
A. Granite
B. Dolerite
C. Basalt
D. All the above
Answer : A

27. Snowcrete is one of the patent forms of
A. Distempers
B. Water proof cement paints
C. Enamel paints
D. Cellulose paints
Answer : B

28. Pick up the correct statement from the following:
A. Rust is due to formation of oxides
B. Cast iron oxidises less
C. Steel oxidises most
D. All the above
Answer : D

29. Rapid hardening cement contains
A. Tri-calcium silicate
B. Tri-calcium aluminate
C. Tetra-calcium alumino-ferrite
D. Di-calcium silicate
Answer : A

30. Plastic asphalt is
A. Used as a water proofing layer over roof
B. A mixture of cement and asphalt
C. A natural asphalt
D. A refinery product
Answer : B

31. A mortar joint in masonry which is normal to the face of wall is known as
A. Bed joint
B. Wall joint
C. Cross joint
D. Bonded joint
Answer : C

32. The weight of 1 m³ of brick earth, is about
A. 1200 kg
B. 1500 kg
C. 1800 kg
D. 2000 kg
Answer : C

33. With increase in moisture content, the bulking of sand
A. Increases
B. Decreases
C. First increases to a certain maximum value and then decreases
D. First decreases to a certain minimum value and then increases
Answer : C

34. The plywood
A. Has good strength along the panel only
B. Can be spilt in the plane of the panel
C. Has greater impact resistance to blows than ordinary wood
D. Cannot be bent more easily than ordinary wood of same thickness
Answer : C

35. Jhumb bricks are
A. Under burnt
B. Over burnt
C. Kutcha
D. None of these
Answer : B

36. Excess of silica in brick earth results in
A. Cracking and warping of bricks
B. Loss of cohesion
C. Enhancing the impermeability of bricks
D. None of the above
Answer : B

37. The hardest rock is
A. Marble
B. Diamond
C. Talc
D. Quartz
Answer : B

38. Red short iron cracks when bent due to the presence of
A. Sulphur
B. Carbon
C. Phosphorus
D. Silicon
Answer : A

39. Bessemer process is used for the manufacture of
A. Pig iron
B. Cast iron
C. Wrought iron
D. Steel
Answer : D

40. Granite mainly composed of quartz and feldspar particles, is obtained from
A. Sedimentary rocks
B. Metamorphic rocks
C. Igneous rocks
D. All the above
Answer : C

41. The moisture content in a well seasoned timber is
A. 4 % to 6 %
B. 10 % to 12 %
C. 15 % to 20 %
D. 100 %
Answer : B

42. Which of the following represents a metamorphic rock? (i) Slate (ii) Shale (iii) Quartzite The correct answer is
A. Only (iii)
B. Both (i) and (iii)
C. Both (ii) and (iii)
D. All (i), (ii) and (iii)
Answer : B

43. The most important constituent of an oil paint, is
A. Thinner
B. Vehicle
C. Pigment
D. All the above
Answer : D

44. Crushing strength of a good building stone should be more than
A. 50 MPa
B. 100 MPa
C. 150 MPa
D. 200 MPa
Answer : B

45. Apiece of sawn timber whose cross-sectional dimensions exceed 5 cm, in one direction and 20 cm in the other direction, is called a
A. Cant
B. Deal
C. Baulk
D. Strip
Answer : C

46. Lacquer is
A. Oil paint
B. Distemper
C. Spirit varnish
D. None to these
Answer : C

47. Pick up the correct statement from the following:
A. In stone arches, the stones are placed with their natural beds radial
B. In cornices, the stones are placed with their natural beds as vertical
C. In stone walls, the stones are placed with their natural beds as horizontal
D. All the above
Answer : D

48. 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

49. Turpentine oil is used in paints as
A. Thinner
B. Vehicle
C. Base
D. Drier
Answer : A

50. A rock contains only one mineral. It is called
A. Homogeneous
B. Non-homogeneous
C. Monomineralic
D. Polymineralic
Answer : C