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1. Which State of India is the highest producer of cement?

  1. Uttar Pradesh
  2. Uttarakhand
  3. Gujrat
  4. Madhya Pradesh

Answer: (4) Madhya Pradesh

-> China is largest producer
-> India is second largest producer of cement
-> Madhya Pradesh highest producer state of India (about 23%)

2. Which of the following cement should be kept dry to attain its strength?

  1. Hydraulic Cements
  2. Non Hydraulic Cements
  3. Plaster Cements
  4. Both (2) and (3)

Answer: (2) Non Hydraulic Cements

-> Hydraulic Cements required hardness materials such as water (common)
-> Non hydraulic cements: doesn’t require any hardeners to attain strength

3. What are the general components of non hydraulic cements, except?

  1. Lime
  2. Gypsum
  3. Silicones
  4. Oxychloride

Answer: (3) Silicones

Explanation: Basic components of cements are
-> Hydraulic cement: limestone, clay and gypsum
-> Non Hydraulic cement: lime, gypsum plaster, and oxychloride

4. Statement (S1): Lime is also called limestone
Statement (S2): Limestone is called calcium oxide

  1. Both S1 and S2 are correct
  2. Both S1 and S2 are not correct
  3. S1 is correct but S2 is not correct
  4. S1 is not correct but S2 is correct

Answer: (2) Both S1 and S2 are not correct

Correct Statements:
-> S1: Lime is produced by burning the limestone (naturally occurring) in a kiln. So, both are different
-> S2: Limestone is called calcium carbonate (CaCO3) while lime is called to be quicklime or calcium oxide (CaO)

5. Non hydraulic cements hardens because of carbonation of lime with

  1. Atmospheric oxygen
  2. Atmospheric carbon dioxide
  3. Atmospheric nitrogen
  4. All of the above

Answer: (2) Atmospheric carbon dioxide

Explanation: Non hydraulic cements take a longer time to harden because of the slow carbonation reaction with carbon dioxide.

6. Hydraulic Cements hardens because of chemical reaction between anhydrous cement powder with

  1. Oxygen
  2. Nitrogen
  3. Dihydrogen monoxide
  4. Carbon dioxide

Answer: (3) Dihydrogen monoxide

Explanation: The chemical name of water is dihydrogen monoxide.

7. Who is known as the inventor of Portland cement?

  1. William Portland
  2. William Wordworth
  3. William Shatner
  4. William Aspdin

Answer: (4) William Aspdin

Explanation: Portland cement was patented by William Aspdin in 1824. The name of Portland cement was on Portland stone,  Dorset, England.

8. Which is true for general components of cement?

  1. Highest amount of lime
  2. Highest amount of Silica
  3. Lowest amount of lime
  4. Lowest amount of Alumina

Answer: (2) Highest amount of silica

Explanation: General composition of cement is about:

-> Lime (Calcium oxide): 60 to 65%
->  Silica: 17-25%
-> Alumina: 3-8%
-> Magnesia: 1-3%
-> Sulfur trioxide: ~1%

9. The range of lime (CaO) is within ______ in Portland cement.

  1. 30 – 35%
  2. 35 – 55%
  3. 60 – 65%
  4. 70 – 75%

Answer: (3) 60 – 65%

10. The main components of Portland cement are:

a. Aluminum oxide  b. Calcium oxide  c. Magnesium oxide  d. Silicon oxide

  1. a and b are correct
  2. b and d are correct
  3. a and d are correct
  4. b and c are correct

Answer: (2) b and d are correct

Explanation: Four main components of portland cement are:
-> Tricalcium silicate (3CaO · SiO2)
-> Dicalcium silicate (2CaO · SiO2)
-> Tricalcium aluminate (3CaO · Al2O3)
-> Tetra-calcium aluminoferrite (4CaO · Al2O3· Fe2O3)Check our dedicated post to find out the composition of different types of cement.

11. Which of the following are the chemical components of portland cement, except:

  1. Silicon oxide
  2. Calcium oxide
  3. Ferric oxide
  4. Cuprous oxide

Answer: (4) Cuprous oxide

Explanation: Chemical composition of each compound in portland cement are:-> Silicon oxide (SiO2):  ~21%
-> Calcium oxide (CaO): ~ 60%
-> Aluminum oxide (Al2O3): ~7%
-> Ferric Oxide (Fe2O3): 1 to 6%
-> Magnesium oxide (MgO): ~3% (impurity to ferric oxide)
-> Sulfur trioxide: 1 to 2.5%.

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