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.

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Building & Construction Practice Test: Cement Concrete Construction

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25 Questions

1. The process of selection of relative proportions of cement, sand, course aggregate and water, so as to obtain a concrete of desired quantity is known as the ________

Proportioning of reinforcementProportioning of concreteProportioning of cementProportioning of water

2. _________ vibrators consists of the Steel Tube which is inserted in fresh concrete.

Internal vibratorsVibrating tableSurface vibratorsShutter vibrators

3. 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 concreteCement mortarCement slurryCement grouting

4. 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.

Stream WaterLake waterSea waterGround water

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

EconomicalNot recommendedCorrosion proofRecommended

6. One of the important effects of the collision is the formation of _______

ShineSlugCracksGases

7. The only drawback of lightweight concrete is that the ___________

Depth of carbonationDesalinationHeavy absorptionOxidation

8. For ordinary building works, the ___________ is formed and the concrete is conveyed in pans from hand to hand.

Conveyor beltBucketHuman ladderPump

9. For ________ mixing, all the material of concrete including water, are collected in a revolving drum and drummer is rotated for a certain period.

MachineRollerDrumHand

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

Rotating table testVee-bee testSlump cone testCompaction factor test

11. The presence of moisture in the sand _____________ the volume of the sand.

ContractShrinkDecreasesIncreases

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

M10 and M20M1.5 and M2.5M5 and M7.5M40 and M35

13. The ratio of the amount of water to the amount of cement by weight is termed as the _______

Cement-water ratioWater-cement ratioAggregate-sand ratioSand-aggregate ratio

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

Shutter vibratorsImmersion vibratorsSurface vibratorsInternal vibrators

15. In ________ method, the fineness modulus of sand and aggregate is determined by the standard tests.

Fineness modulus methodMaximum void methodMinimum void methodArbitrary method

16. The _________ are provided in expansion and contraction joints to transfer the load.

WaterbarsFillersDowelsJoint filler

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

LakeRiverSeaMineral

18. The ____________ is the most effective process of repairing concrete work which has been damaged due to enquiry work or other reasons.

VibratingPouringGroutingGuniting

19. The process of rolling, folding and spreading of the particle is known as the __________ of concrete.

WateringMixingGroutingCuring

20. ________ 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 methodMinimum void methodMaximum void methodArbitrary method

21. In _______ method of volumetric proportions, the proportions of cement, sand and coarse aggregate are fixed or beta really such as 1:2:4 or 1:3:6 etc.

Maximum void methodWater-cement ratio methodArbitrary methodMinimum void method

22. For _______ mixing, the materials are stacked on watertight platform, which may be either of wood, Brick or steel.

HandMixerRollerMachine

23. The ____________ is the simplest corrosion produced by means of chemical attack.

Chemical action theoryGalvanic action theoryElectrolytic theoryHigh temperature oxidation

24. Identify the given joint in Concrete Structures.

Vertical construction jointExpansion jointContraction JointWater tank joint

25. Form unimportant works, the consolidation of concrete is carried out by ___________ method which include Ramming, tamping, spading and slicing with suitable tools.

MachineVibratorRollerHand