Concrete Technology MCQs | Civil Engineering MCQs for Concrete Technology

Concrete Technology MCQs | Civil Engineering MCQs for Concrete Technology. best learning and study materials, reports, etc for Concrete. Must Read Now

Concrete Technology MCQs | Civil Engineering MCQs for Concrete Technology

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Which is the weakest concrete mix?





ANSWER = [D] 1:5:10

The correct answer for Which is the weakest concrete mix is 1:5:10.

Portland cement is manufactured by using which materials.





ANSWER= [D] Limestone, clay and gypsum
The correct answer for Portland cement is manufactured by using Limestone, clay and gypsum.

Detailed Explanation for Portland Cement is Manufacturing

Portland cement is the most common type of cement in general use around the world, used as a basic ingredient of concrete mortar, stucco and most non-speciality grout.

It developed from other types of hydraulic lime in England in the mid 19th century and usually originates from limestone.

It is a fine powder produced by heating materials in a kiln to form what is called clinker, grinding the clinker, and adding small amounts of other materials. Several types of Portland cement are available with the most common being called ordinary Portland cement (OPC) which is grey in colour, but a white Portland cement is also available.

Portland cement is manufactured by using Limestone, clay and gypsum.


Which of the following compound is responsible to control the strength and soundness of cement?





ANSWER= [A] CaO
The correct answer for Which of the following compound is responsible to control strengt h and soundness of cement is CaO.

______ of water by weight of cement is required for the complete chemical reaction of cement and occupy the space within gel pores





ANSWER = [D] 38 percent

The correct answer is 38 percent of water by weight of cement is required for the complete chemical reaction of cement and occupy the space within gel pores.

Ultimate strength to cement is provided by





ANSWER= [B] Di- calcium silicate
The correct answer for Ultimate strength to cement is provided by Di- calcium silicate.

The concrete cubes are prepared, cured, and tested according to Indian standard code number





ANSWER= [B] IS: 516
The correct answer for The concrete cubes are prepared, cured, and tested according to Indian standard code number is IS: 516.

The repair and rehabilitation of damaged or spalled concrete is done by removing the





ANSWER= [A] Loose concrete
The correct answer for The repair and rehabilitation of damaged or spalled concrete is done by removing the Loose concrete

Which of the following tests measures toughness of aggregates?





ANSWER= [D] Impact value test
Impact value test measures toughness of aggregates.

The compaction factor test for cement concrete determines its ______





ANSWER= [D] Workability
The compaction factor test for cement concrete determines its Workability.

Which of the following aggregates gives maximum strength in concrete





ANSWER= [D] Cubical aggregate


Cubical aggregates gives maximum strength in concrete



What percentage of bound water by weight of cement is required for chemical reaction with Portland cement compounds?





ANSWER = [B] 23%

23% percentage of bound water by weight of cement is required for chemical reaction with Portland cement compounds


The coarse sand has fineness modulus in the range of





ANSWER = [D] 2.9-3.2

The coarse sand has fineness modulus in the range of 2.9-3.2


The minimum compressive strength (MPa) of 53 grade Ordinary Portland Cement after 72 hours should not be less than





ANSWER = [C] 27

The minimum compressive strength (MPa) of 53 grade Ordinary Portland Cement after 72 hours should not be less than 27


Based on the heat released upon hydration, arrange the following four compounds of the cement (1. C3S, 2. C2S 3. C3A 4. C4AF) in descending order.





ANSWER = [B] 3, 1 ,4, 2

Based on the heat released upon hydration, arrange the following four compounds of the cement (1. C3S, 2. C2S 3. C3A 4. C4AF) in the descending order 3, 1 ,4, 2.


For complete hydration of cement, the w/c ratio needed is





ANSWER = [C] more than 0.35 but less than 0.45

For complete hydration of cement, the w/c ratio needed is more than 0.35 but less than 0.45


The approximate ratio between the strengths of cement concrete at 7 days and 28 days is





ANSWER = [B] 2/3

The approximate ratio between the strengths of cement concrete at 7 days and 28 days is 2/3


A splitting tensile test is performed on a cylinder of diameter ‘D’ and length ‘L’. If the ultimate load is ‘P’, then the splitting tensile strength of concrete is given by





ANSWER = [B] 2P/πDL

A splitting tensile test is performed on a cylinder of diameter ‘D’ and length ‘L’. If the ultimate load is ‘P’, then the splitting tensile strength of concrete is given by 2P/πDL


The split tensile strength of M15 grade concrete when expressed as a percentage of its compressive strength is





ANSWER = [A] 10 to 15%

The split tensile strength of M15 grade concrete when expressed as a percentage of its compressive strength is 10 to 15%


Shrinkage of concrete depends upon the

  1. Relative humidity of the atmosphere
  2. Passage of time
  3. Applied stress

Which of these statements is/are correct?





ANSWER = [A] 1 and 2

Shrinkage of concrete depends upon the relative humidity of the atmosphere and passage of time


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