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B.Tech Civil Cement — practice questions

Explore 23 free Cement questions in B.Tech Civil Civil Engineering. Open each question or exercise to read its content, reference answers and available explanation.

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Cement questions and exercises with answers

Showing questions 1–23 of 23.

In the wet process of Portland cement manufacture, the rotary kiln operates with a hottest-zone temperature of approximately:Read the answer and worked solution →The size range of the fused clinker mass produced in the rotary kiln, as given in the source, is:Read the answer and worked solution →Per the source, when grinding clinker to produce Portland cement, the percentage of gypsum added by weight is:Read the answer and worked solution →According to Table 1.1 (Oxide Composition Limits) of OPC, the permissible CaO content lies in the range:Read the answer and worked solution →Per IS 269-1989, the insoluble residue percentage by mass in ordinary Portland cement shall not be greater than:Read the answer and worked solution →In Bogue's compound notation used for Portland cement, the symbol 'C' stands for:Read the answer and worked solution →Tetracalcium aluminoferrite, in Bogue's compound notation, is written as:Read the answer and worked solution →C3S and C2S together typically constitute the cement strength because their share of total cement is:Read the answer and worked solution →Which Bogue compound, on reaction with water, is mainly responsible for the EARLY strength of concrete?Read the answer and worked solution →The chief hydration product 'Tobermorite Gel' described in the source is commonly known as:Read the answer and worked solution →For complete hydration of Portland cement, the total water required as a percentage of cement weight is approximately:Read the answer and worked solution →The compressive strength figure in the BIS designation '53 Grade OPC' refers to the minimum 28-day strength of:Read the answer and worked solution →Under the ASTM classification, the cement Type used 'when high early strength is required (Rapid Hardening Cement)' is:Read the answer and worked solution →Under the ASTM classification, the Type used when 'high sulphate resistance is required' is:Read the answer and worked solution →The cement most ideally suited for mass concrete construction such as dams, per the source, is:Read the answer and worked solution →Air entraining cement is used principally to improve the resistance of concrete to:Read the answer and worked solution →The minimum specific surface (by Blaine air permeability) prescribed for Ordinary Portland Cement (33 Grade OPC, IS-269-1989) is:Read the answer and worked solution →Per Table 1.5, the soundness of Ordinary Portland Cement tested by the Le Chatelier method must not exceed:Read the answer and worked solution →Per Table 1.5, the maximum permitted FINAL setting time of Ordinary Portland Cement is:Read the answer and worked solution →Flip the cards and match each Bogue compound symbol to its full name.Read the answer and worked solution →Pick the item that does not belong with the other three.Read the answer and worked solution →Type each cement-compound or admixture abbreviation as it appears.Read the answer and worked solution →Balance the Bogue calcium silicate hydration: tricalcium silicate plus water → C-S-H gel plus calcium hydroxide.Read the answer and worked solution →

Worked practice questions

In the wet process of Portland cement manufacture, the rotary kiln operates with a hottest-zone temperature of approximately:

  1. About 800 degree C
  2. About 1500 degree C
  3. About 1200 degree C
  4. About 2000 degree C
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Correct answer: B. About 1500 degree C

1. §1.2 (d) states: 'The temperature in the hottest part of the kiln is about 1500 degree C resulting in the slurry getting converted into a fused mass of 3 mm to 20 mm size known as clinker.' 2. The other options are out of the named range. _Source: IGNOU ET-522 Block-1 Unit-1 Cement, §1.2(d), p. 6_

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The size range of the fused clinker mass produced in the rotary kiln, as given in the source, is:

  1. 1 mm to 5 mm
  2. 20 mm to 50 mm
  3. 3 mm to 20 mm
  4. 50 mm to 100 mm
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Correct answer: C. 3 mm to 20 mm

1. §1.2(d): clinker is a 'fused mass of 3 mm to 20 mm size'. 2. The Key Words at §1.12 confirm: 'Clinker: Fused mass of 3 mm to 20 mm size.' _Source: IGNOU ET-522 Block-1 Unit-1 Cement, §1.2(d) and §1.12, pp. 6 and 17_

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Per the source, when grinding clinker to produce Portland cement, the percentage of gypsum added by weight is:

  1. 2 to 3 percent
  2. 1 to 2 percent
  3. 5 to 7 percent
  4. 10 to 12 percent
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Correct answer: A. 2 to 3 percent

1. §1.2 (Wet process, e): 'Finally this clinker is ground in a ball mill with 2 to 3 percent of gypsum to produce portland cement.' 2. Gypsum is added to prevent the flash set otherwise caused by C3A reacting violently with water (§1.5 d). _Source: IGNOU ET-522 Block-1 Unit-1 Cement, §1.2(e) and §1.5(d), pp. 6 and 8_

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More Civil Engineering topics

GATE Civil — Core TopicsStrength of MaterialsAggregatesTesting of ConcreteConcreting EquipmentWorkability of Fresh ConcreteConcrete Mix DesignSpecial Concrete