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Cement

Course: Concrete Technology — Practice MCQs, solutions, formulas & past entrance questions.

Courses › Concrete Technology › Cement

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Chapter:

cement (Click to view content)

1. In order to prevent this rapid reaction ___ is added to clinker.

C₄AF Gypsum Water Extra cement

Gypsum

In order to prevent this rapid reaction gypsum is added to clinker. Gypsum, C3A&water react to form relatively insoluble Calcium-Sulfo-Aluminates.

Hint Answer

2. The development of first 28 days strength is on account of hydration of ______

C₂S C₃S C₃A C₄AF

C₃S

Higher C₃S?higher early strength-higher heat generation (roads, cold environments). Higher CS?lower early strength-lower heat generation (dams).

Hint Answer

3. The blended meal is sieved and fed into a rotating dish called a ___

Clinker Kiln Granulator Raw meal

Granulator

The blended meal is sieved and fed into a rotating dish called a granulator, water weighing about 12% of meal being added at same time.

Hint Answer

4. What is composition of making Mortar?

P.C. + Water P.C. + Water + Sand P.C. + Water + Sand + Gravel Water + Sand + Gravel

P.C. + Water + Sand

Mortar is a mixture of 3 materials i.e. cement, water and sand (P.C. + sand + water = Mortar), used in building for holding bricks or stones toger.

Hint Answer

5. What is percentage of cement produced in dry process?

85% 70% 75% 80%

75%

In this process, calcareous material and argillaceous material are ground separately to fine powder in absence of water and n are mixed toger in desired proportions. Dehydration zone requires a somewhat shorter distance than wet process.

Hint Answer

6. When chalk is used ___

It is finely broken up and dispersed in water in a wash mill It has to be blasted, then crushed, usually in two progressively smaller crushers It is sieved and fed into a rotating dish called a granulator The raw materials are crushed and fed into a grinding mill, where they are dried and reduced into fine powder

It is finely broken up and dispersed in water in a wash mill

When chalk is used, it is finely broken up and dispersed in water in a wash mill. Similarly, clay is also broken up and mixed with water, usually in a similar wash mill.

Hint Answer

7. As materials pass through kiln ir temperature is rised upto ____

1300-1600 °C 1100-1500 °C 1300-1500 °C 1100-1600 °C

1300-1600 °C

1300-1600 �C is best range to melt raw materials for a healty PC. Below 1300 �C materials whcih we added to make PC won?t melt perfectly and result will be unhealty PC.

Hint Answer

8. Cement is a material with adhesive and cohesive properties.

True False

True

Cement is a material with adhesive and cohesive properties which make it capable of bonding mineral fragments into a compact whole.

Hint Answer

9. The slurry with desired lime content passes into _____

Clinker Rotary kiln Slurry tank Cement silo

Rotary kiln

The slurry with desired lime content passes into rotary kiln up to 8 m in diameter and length 230m.

Hint Answer

10. Which compound is liberates higher heat?

C₂S C₃S C₃A C₄AF

C₃S

C3S having a faster rate of reaction accompanied by greater heat generation developes early strength of paste.

Hint Answer

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All Chapters

View all Chapter and number of question available From each chapter from Concrete-Technology

Cement

Types of Cement and Testing of Cement

Types of Cement and Testing of Cement

Aggregates and Testing of Aggregates

Aggregates and Testing of Aggregates

Water

Admixtures and Construction Chemicals

Admixtures and Construction Chemicals

Fresh Concrete

Strength of Concrete

Strength of Concrete

Elasticity, Creep and Shrinkage

Elasticity, Creep and Shrinkage

Durability of Concrete

Durability of Concrete

Testing of Concrete

Testing of Concrete

Concrete Mix Design

Concrete Mix Design

Quality Control

Quality Control

Special Concrete and Concreting Methods

Special Concrete and Concreting Methods

IS Codes Related to Cement and Concrete

IS Codes Related to Cement and Concrete

Repair Technology for Concrete Structures

Repair Technology for Concrete Structures

Concrete Technology Important Questions

Concrete Technology Important Questions

Topics

This Chapter cement consists of the following topics

Cement

In order to prevent this rapid reaction ___ is added to clinker.

The development of first 28 days strength is on account of hydration of ______

The blended meal is sieved and fed into a rotating dish called a ___

What is composition of making Mortar?

What is percentage of cement produced in dry process?

When chalk is used ___

As materials pass through kiln ir temperature is rised upto ____

Cement is a material with adhesive and cohesive properties.

The slurry with desired lime content passes into _____

Which compound is liberates higher heat?

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