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Chapter 3: Concrete

Total questions: 20

Worksheet time: 20mins

Name
Class
Date
1.

he 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 ________

a)

Proportioning of reinforcement

b)

Proportioning of concrete

c)

Proportioning of cement

d)

Proportioning of water

2.

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.

a)

Minimum void method

b)

Maximum void method

c)

Water-cement ratio method

d)

Water-cement ratio method

3.

The strength of well compacted concrete with good workability is depend only on the _________

a)

Water content

b)

Cement content

c)

Water-cement ratio

d)

Water-soaked ratio

4.

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

a)

Curing

b)

Mixing

c)

Grouting

d)

Watering

5.

The concrete having bulk density between 5 kN/m3 to 18 kN/m3 is known as _________

a)

Coloured concrete

b)

Lightweight concrete

c)

No-fines concrete

d)

Heavyweight concrete

6.

The sound absorption of light weight concrete is _________

a)

Medium

b)

Bad

c)

Good

d)

Cannot say

7.

The _________ is used to measure the workability of concrete mixture which is commonly used in the field.

a)

Vee-bee test

b)

Slump test

c)

Compaction factor

d)

Workability test

8.

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

a)

Compaction factor test

b)

Vee-bee test

c)

Rotating table test

d)

Slump cone test

9.

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

a)

Increases

b)

Decreases

c)

Shrink

d)

Contract

10.

Concrete can be formulated with high tensile strength, but always has lower compressive strength.

a)

True

b)

False

11.

Which type of machine does the figure below represents?

a)

Purifier

b)

Water tank

c)

Electric Cement Mixer

d)

Harvesting machine

12.

How many components are mainly used to prepare concrete?

a)

5

b)

3

c)

2

d)

4

13.

As water cement ratio increases, ________ also increases.

a)

Compressive strength

b)

Tensile strength

c)

Bleeding

d)

Workability

14.

Which component of concrete gives it desired compressive strength?

a)

Water

b)

Cement

c)

Aggregates

d)

Admixture

15.

Which process comes after batching in manufacture process?

a)

Transportation

b)

Placing

c)

Mixing

d)

Compacting

16.

In small works, concrete is transported using:

a)

Conveyer belts

b)

Pumps

c)

Pans

d)

Buckets

17.

The figure above represents a:

a)

Low slump

b)

Normal slump

c)

Shear slump

d)

Collapse slump

18.

Workability reduces with time.

a)

True

b)

False

19.

Higher the cement content,

a)

Higher aggregates

b)

Lower workability

c)

Higher strength

d)

Lower strength

20.

The size of commonly used specimen for compression test is:

a)

50×30 mm

b)

150x150x150 mm

c)

150x50x50 mm

d)

150×150 mm