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
lime 63% ; silica 22% ; other ingredients 15%
lime 22% ; silica 63% ; other ingredients 15%
silica 40% ; lime 40% ; other ingredients 20%
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
Sulphur
Carbon
Phosphorus
Silicon
3. Phosphorus
33. Due to attack of dry rot, the timber
Cracks
Shrinks
Reduces to powder
None of these
3. Reduce to Powder
34. Which one of the following is acid resistant asbestos:
Actinolite asbestos
Amosite asbestos
Anthophyllite asbestos
All the above
4. All the above
35. Kaolin is chemically classified as
Metamorphic rock
Argillaceous rock
Calcareous rock
Siliceous rock
2. Argillaceous rock
36. The plastics made from cellulose resin
Are as clear as glass
Are tough and strong
Possess excellent electrical properties
All the above
4. All the above
37. Bitumen in
Solid state, is called asphalt
Semi fluid state, is called mineral tar
Fluid state, is called petroleum
All the above
4. All the above
38. The main constituent of fly-ash, is
Aluminium oxide
Silica
Ferrous oxide
All of these
4. All of these
39. Wrought iron contains carbon about
1.5% to 5.5%
0.5% to 1.75%
0.1% to 0.25%
None to these
3. 0.1% to 0.25%
40. Depending on the chemical composition and mechanical properties, iron may be classified as
Cast iron
Wrought iron
Steel
All of these
4. All of these
