Civil engineering MCQ on Building Materials

Civil engineering MCQs on building materials with explanation | Basic civil engineering interview questions which were asked in various construction companies and government PWD, GATE, PSU civil engineering jobs interviews. Also get these civil engineering interview questions and answers pdf for free.

31. For the manufacture of Portland cement, the proportions of raw materials used, are

  1. lime 63% ; silica 22% ; other ingredients 15%

  2. lime 22% ; silica 63% ; other ingredients 15%

  3. silica 40% ; lime 40% ; other ingredients 20%

  4. silica 70% ; lime 20% ; other ingredients 10%.

1. lime 63% ; silica 22% ; other ingredients 15%

32. Brittleness of cold is due to an excess of

  1. Sulphur

  2. Carbon

  3. Phosphorus

  4. Silicon

3. Phosphorus

33. Due to attack of dry rot, the timber

  1. Cracks

  2. Shrinks

  3. Reduces to powder

  4. None of these

3. Reduce to Powder

34. Which one of the following is acid resistant asbestos:

  1. Actinolite asbestos

  2. Amosite asbestos

  3. Anthophyllite asbestos

  4. All the above

4.  All the above

35. Kaolin is chemically classified as

  1. Metamorphic rock

  2. Argillaceous rock

  3. Calcareous rock

  4. Siliceous rock

2. Argillaceous rock

36. The plastics made from cellulose resin

  1. Are as clear as glass

  2. Are tough and strong

  3. Possess excellent electrical properties

  4. All the above

4. All the above

37. Bitumen in

  1. Solid state, is called asphalt

  2. Semi fluid state, is called mineral tar

  3. Fluid state, is called petroleum

  4. All the above

4. All the above

38. The main constituent of fly-ash, is

  1. Aluminium oxide

  2. Silica

  3. Ferrous oxide

  4. All of these

4.  All of these

39. Wrought iron contains carbon about

  1. 1.5% to 5.5%

  2. 0.5% to 1.75%

  3. 0.1% to 0.25%

  4. None to these

3. 0.1% to 0.25%

40. Depending on the chemical composition and mechanical properties, iron may be classified as

  1. Cast iron

  2. Wrought iron

  3. Steel

  4. All of these

4. All of these



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