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Concrete Technology Multiple Choice Questions | MCQs | Quiz

Concrete Technology Interview Questions and Answers
Pratice Concrete Technology questions and answers for interviews, campus placements, online tests, aptitude tests, quizzes and competitive exams.

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•   Portland Cement
•   Wet Process
•   Dry Process
•   Cement Hydration
•   Cement Types
•   Applications-Cement Types
•   Cement Testing
•   Standard Consistency Test
•   Setting Time Test
•   Chemical Composition Test
•   Aggregates Classification
•   Aggregates Source
•   Aggregates Strength
•   Aggregates Bulking
•   Aggregates Soundness
•   Thermal Properties
•   Aggregates Testing
•   Mechanical Properties
•   Water Quality
•   Sea Water Usuage
•   Admixtures
•   Damp Proofing Admixtures
•   Water Proofing Admixtures
•   Plasticizers
•   Accelerators & Retarders
•   Silica Fume
•   Agents
•   Concrete Repair System
•   ↓ Fresh Concrete ↓
•   Fresh Concrete Workability
•   Workability Measurement
•   Workability Tests
•   Manufacture Process
•   Fresh Concrete Curing
•   Water Cement Ratio
•   Gel Space Ratio
•   Concrete Maturity Concept
•   High Strength Concrete
•   Ultra High Strength
•   HPC
•   Elastic Properties
•   Creep
•   Factors Affecting Creep
•   Shrinkage
•   Factors Affecting Shrinkage
•   Shrinkage Types
•   Strength & Durability
•   Permeability
•   Mass Concrete
•   Compression Test
•   Hardened Concrete Curing
•   Concrete Flexural Strength
•   Ring Tension Test
•   Destructive Tests
•   Pulse Velocity Test
•   Cement Applications
•   Concrete Mix Design
•   American Concrete Method
•   Road Method of Mix Design
•   Pumpable Concrete
•   IS for Concrete Mix Design
•   Sampling
•   Impaction
•   Testing
•   Concrete Quality
•   Concrete Quality Factors
•   Quality Control Advantages
•   Concrete Construction
•   Special Concrete
•   Light Weight Concrete
•   Structural Light Weight
•   Aerated Concrete
•   High Density Concrete
•   Sulphur Infiltrated Concrete
•   Concrete Cloth
•   Cold Weather Concreting
•   Hot Weather Concreting
•   Mix Design
•   Various Testing Methods
•   Concrete Complexity
•   New Generation Plasticizer
•   Concrete IS Codes
•   Construction Defects
•   Distress Symptoms
•   Concrete Cracking
•   Destructive Testing
•   Non Destructive Testing
•   Cement Type Applications

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Concrete Technology Questions and Answers – New Generation Plasticizers

Posted on December 19, 2017 by Manish

This set of Concrete Technology Multiple Choice Questions & Answers (MCQs) focuses on “New Generation Plasticizers”.

1. What is plasticizers?
a) Which adds water for workability
b) Which reduces water for workability
c) Which decreases workability at the same water content
d) Which oxidizes water for workability
View Answer

Answer: b
Explanation: The organic substances or combinations of organic and inorganic substances, which allow a reduction in water content for the given workability, or give a higher workability at the same water content.

2. Which one is an anionic surfactants?
a) Polyglycol esters
b) Hydroxylated carboxylic acids
c) Lignosulphonates
d) Carbohydrates
View Answer

Answer: c
Explanation: Anionic surfactants such as lignosulphonates and their modifications and derivatives, salts of sulphonates hydrocarbons.

3. What is the amount used of plasticizers in cement by weight?
a) 0
b) .1-.4%
c) 1%
d) 1-2%
View Answer

Answer: b
Explanation: Plasticizers are used in the amount of 0.1% to 0.4% by weight of cement. Plasticizers or water reducers, and superplasticizers or high range water reducers, are chemical admixtures that can be added to concrete mixtures to improve workability.

4. What is the limitation of plasticizers?
a) A good plasticizer is one which does not cause air-entrainment in concrete > .1-.2%.
b) A good plasticizer is one which does not cause air-entrainment in concrete > 5%.
c) A good plasticizer is one which does not cause air-entrainment in concrete > 10-20%.
d) A good plasticizer is one which does not cause air-entrainment in concrete > 1-2%.
View Answer

Answer: d
Explanation: A good plasticizer is one which does not cause air-entrainment in concrete > 1-2%. Plasticizers or water reducers are chemical admixtures that can be added to concrete mixtures to improve workability.

5. At constant workability, what is the reduction in mixing water?
a) 1-2%
b) 50%
c) .1-.4%
d) 5-15%
View Answer

Answer: d
Explanation: At constant workability, the reduction in mixing water is expected to be of the order of 5% to 15%.

6. Where do we use plasticizers?
a) Where low degree of workability is required
b) Where medium degree of workability is required
c) Where high degree of workability is required
d) Where very low degree of workability is required
View Answer

Answer: c
Explanation: Where low degree of workability is required like Deep beams, column and beam junctions.

7. What is super plasticizers?
a) Which adds water for workability
b) Which reduces high range of water for workability
c) Which decreases workability at the same water content
d) Which oxidizes water for workability
View Answer

Answer: b
Explanation: The organic substances or combinations of organic and inorganic substances, which allow a high reduction in water content for the given workability at the same water content.

8. What is the allowed reduction of water with super plasticizers without reducing workability?
a) 10%
b) 20%
c) 30%
d) 40%
View Answer

Answer: c
Explanation: Super plasticizers permits reduction of water content about 30% without reducing the workability.

9. Is it possible to use w/c ratio as low as 5?
a) Yes
b) No
View Answer

Answer: b
Explanation: It is possible to use w/c ratio as low as 0.25 or even lower and yet to make flowing concrete to obtain strength of order 120Mpa or more.

10. What is the limitation of Carboxylic acids in High range water reducers?
a) 0
b) .1%
c) .2%
d) .3%
View Answer

Answer: b
Explanation: It is the standard value of limitation of Carboxylic acids in High range water reducers i.e. .1%.

Sanfoundry Global Education & Learning Series – Concrete Technology.

To practice all areas of Concrete Technology, here is complete set of 1000+ Multiple Choice Questions and Answers.

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Concrete Technology Questions and Answers – IS Codes Related to Cement and Concrete »

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