Concrete is a basic construction material that's made up of a paste and aggregates. The paste is made of water and portland cement, which coats the surface of the aggregates. The chemical reaction of hydration hardens the paste and forms concrete.  Concrete should have the following properties: Workability: The concrete mix should be easy to place and consolidate Strength: Concrete should be resistant to wear, freezing, thawing, and water tightness  Here are some other things to consider when working with concrete: Reinforced concrete This is one of the most common materials used in... Show more

Concrete is a basic construction material that's made up of a paste and aggregates. The paste is made of water and portland cement, which coats the surface of the aggregates. The chemical reaction of hydration hardens the paste and forms concrete. 

Concrete should have the following properties:
Workability: The concrete mix should be easy to place and consolidate
Strength: Concrete should be resistant to wear, freezing, thawing, and water tightness 

Here are some other things to consider when working with concrete:
Reinforced concrete
This is one of the most common materials used in construction. Steel rods, wire, or cables are embedded in the concrete to strengthen its structure and help it withstand strong forces like earthquakes.
Lightweight concrete
This concrete has improved insulation, thermal properties, and a reduced mass. It can still maintain strength and durability during construction.
Fiber-reinforced polymers (FRPs)
These are commonly used to strengthen concrete structures because they are lightweight, strong, and durable.
Precast concrete
This is a popular method used in construction. It's easy to use for small retaining walls, highway barriers, and wide commercial spaces.
Prestressed concrete
This type of concrete is tightly compacted during manufacture to reinforce it against tensile pressures that will occur in service. 

Concrete should also be able to withstand heavy loads. Concrete test results depend on the cement strength, water-cement ratio, and concrete quality. 

Cement Concrete Construction topics include: Cement concrete properties, steel corrosion in concrete, proportioning and curing concrete, water cement ratio, concrete types and joints.

Show less

Building & Construction Practice Test: Cement Concrete Construction

Time left 00:00

25 Questions

1. The use of reinforcement in the no-fines concrete is generally ________

Not recommendedEconomicalCorrosion proofRecommended

2. __________ vibrators are attached to the form work and the external centring of walls, column, etc.

Immersion vibratorsSurface vibratorsInternal vibratorsShutter vibrators

3. While placing concrete in hot weather, the aggregate should be _____________ to bring down the temperature of concrete.

Pre cooledWashedBurntHeated

4. The _________ is a mixture of cement and sand, the usual proposition being 1:3.

SlurryMortarGuniteGrout

5. For lean concrete bases and simple foundation for masonry walls ________ grades of concrete may be used.

M10 and M20M1.5 and M2.5M40 and M35M5 and M7.5

6. It is found that the ________ does not lead to the corrosion of reinforcement, provided that the concrete is dense and there is enough cover to the enforcement.

Ground waterLake waterSea waterStream Water

7. The strength of well compacted concrete with good workability is depended only on the _________

Water contentWater-cement ratioCement contentWater-soaked ratio

8. ________ method is based on the principle that the densest concrete is achieved by proportioning its aggregate in such a manner that the heaviest weight of concrete for same volume is obtained.

Water-cement ratio methodArbitrary methodMinimum void methodMaximum void method

9. The Unit Weight of no fines concrete is about ________ of the Unit Weight of conventional concrete.

2/31/23/43/2

10. What is minimum cement content for concrete permanently under sea water to avoid the corrosion of reinforcement?

5 N/m33 N/m35 kN/m33 kN/m3

11. The ________ are the gaps between two individual particles.

BubblesVoidsSpacesPores

12. In ________ Method, the voids of coarse aggregate and fine aggregate are determined separately.

Arbitrary methodOptimum void methodMinimum void methodMaximum void method

13. Identify the given joint in Concrete Structures.

Contraction JointExpansion jointWater tank jointVertical construction joint

14. A ___________ consists of a watertight pipe of diameter about 250 mm to 300 mm.

GroutBucketTremieHopper

15. The _________ is the simplest corrosion produced by means of a chemical attack.

Electro Chemical actionIndirect corrosionElectro osmosis processDirect corrosion

16. Cement concrete is prove to be more economical than _________

CopperAluminiumSteelSilica

17. The ________ water tends to develop dampness and inflorescence of the concrete structures.

LakeSeaRiverMineral

18. 1:2:4, 1:3:6, etc. Are used in which method of volumetric proposition.

Water-cement ratio methodArbitrary methodMinimum void methodFinesse modulus method

19. ___________ corrosion takes place at or near the room temperature when the metal comes into contact with moisture or with aqueous solutions of salt, acids or bases.

Dry corrosionGalvanic corrosionDirect corrosionElectrochemical corrosion

20. The _______ corrosion occurs when two dissimilar metals are in electrical contact with each other and exposed to an electrolyte.

Electrochemical corrosionDry corrosionHigh temperature oxidationGalvanic corrosion

21. The __________ is a mixture of cement, sand, pebbles or crushed rock and water, which, when placed in the skeleton of forms and are allowed to cure, becomes hard like a stone.

Cement slurryCement concreteCement mortarCement grouting

22. In ________ test, the workability of concrete is measured in the terms of internal energy required to compact the concrete fully.

Vee-bee testSlump cone testCompaction factor testRotating table test

23. __________ method is not in common use in case of placing concrete underwater.

TremieGunitingGroutingSpreading

24. As no-fines concrete has little or no ___________ in the fresh state, it requires long time for the removal of forms.

CohesionSwellingAdhesionShrinkage

25. Identify the given joint in Concrete Structures.

Vertical construction jointHorizontal construction jointWater tank jointExpansion construction joint