Test: Concrete Technology - 3 - Civil Engineering (CE) MCQ

Uniform rate of stress

Uniform rate of strain

Constant stress condition

Constant strain condition

Higher value of Poisson’s ratio

Lower value of Poisson’s ratio

The same value of Poisson’s ratio

All of the above depending upon the test conditions

Shrinkage in concrete

Propagation of bond and mortar cracks

Presence of macro and micro cracks

Use of aggregates

50%

20%

10%

5%

3 grades

5 grades

7 grades

10 grades

2

3

5

6

18 kN/m³

22 kN/m³

24 kN/m³

25 kN/m³

Sewage water

Sulphuric acid

Vegetable oil

Alcohol

Reduces its strength

Reduces its bond strength

Causes a large entrainment of air

All of the above

Grade designation

Maximum nominal size of aggregate

Minimum water-cement ratio

Batching, mixing placing and compaction techniques

Emptying the pores in the conventional concrete under vacuum and sucking the liquid sulphur in the pores

Mixing the sulphur powder as an ingredient of normal concrete and heating the cured concrete at high temperature

Applying a coating of molten sulphur on the surface of the concrete

Any of the above

Providing reinforcement bars

Incorporating fibres in the concrete

Polymer impregnation

All of the above

For reducing the dead weight of structures

For improving thermal insulation

In filler wall panels in multistorey buildings

For non load bearing and partition walls

Bloating clays with or without additives

Sintering fly ash

Using blast furnace slag

Any of the above

Is mortar or very fine concrete deposited by jetting it with high velocity on to the prepared surface

Is frequently more economical than conventional concrete

Is very useful for restoration and repair of the damaged concrete structures

All of the above

Is the technique of depositing very thin layers of mortar in each pass of nozzle than that available with the shotcrete

Mix is 1:3 to 1:4.5 with a water-cement ratio of about 0.30

Requires careful and skilful handling of nozzle for high quality finish work

All of the above

Gypsum

Calcium chloride

Calcium carbonate

None of the above

0.95 m³

0.85 m³

0.75 m³

0.65 m³

Alumina

Iron oxide

Silica

Alkalies

1 and 2

2 and 3

1 alone

1, 2 and