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Cement and Aggregate Properties Quiz

Total questions: 40

Worksheet time: 20mins

Name
Class
Date
1.

The specific gravity of Ordinary Portland Cement is about:

a)

2.25

b)

2.75

c)

3.15

d)

3.50

2.

Initial setting time of OPC (IS Code requirement) should not be less than:

a)

10 min

b)

20 min

c)

30 min

d)

60 min

3.

Final setting time of OPC should not exceed:

a)

3 hrs

b)

6 hrs

c)

10 hrs

d)

24 hrs

4.

Normal consistency of cement paste is:

a)

10-15%

b)

20-25%

c)

26-33%

d)

40-50%

5.

Fineness of cement is tested using:

a)

Vicat apparatus

b)

Blaine's Air Permeability test

c)

Le Chatelier test

d)

Los Angeles abrasion test

6.

The main compound responsible for early strength in cement is:

a)

C2S

b)

C3S

c)

C3A

d)

C4AF

7.

The compound responsible for high heat of hydration in cement is:

a)

C3S

b)

C3A

c)

C2S

d)

C4AF

8.

Rapid hardening cement is rich in:

a)

C2S

b)

C3S

c)

C4AF

d)

MgO

9.

The main ingredient of Portland cement is:

a)

Lime

b)

Silica

c)

Alumina

d)

Iron oxide

10.

White cement is produced by reducing:

a)

Silica

b)

Alumina

c)

Iron oxide

d)

Magnesium

11.

The soundness of cement is tested by:

a)

Vicat apparatus

b)

Le Chatelier apparatus

c)

Blaine apparatus

d)

Pycnometer

12.

Setting time of cement is determined by:

a)

Blaine apparatus

b)

Vicat apparatus

c)

Pycnometer

d)

Los Angeles machine

13.

Specific gravity of cement is determined by:

a)

Vicat apparatus

b)

Pycnometer

c)

Blaine apparatus

d)

U-tube

14.

Sulphate resisting cement is recommended for:

a)

Cold regions

b)

Marine structures

c)

Road pavements

d)

Decorative works

15.

The compressive strength of OPC after 28 days should not be less than:

a)

16 MPa

b)

22 MPa

c)

33 MPa

d)

53 MPa

16.

The impact value test determines resistance to:

a)

Gradual loads

b)

Abrasion

c)

Toughness

d)

Weathering

17.

Los Angeles Abrasion test measures:

a)

Crushing resistance

b)

Impact resistance

c)

Abrasion resistance

d)

Water absorption

18.

The maximum aggregate impact value for wearing surface should not exceed:

a)

20%

b)

30%

c)

40%

d)

50%

19.

Water absorption of good quality aggregate should not exceed:

a)

0.1-2%

b)

2-5%

c)

5-10%

d)

10-15%

20.

Specific gravity of aggregates usually lies between:

a)

1.5-2.0

b)

2.6-2.9

c)

3.0-3.5

d)

3.5-4.0

21.

Flakiness index is the percentage of particles:

a)

Length > 1.8×mean size

b)

Thickness < 0.6×mean size

c)

Width > 2×mean size

d)

Length < 0.5×mean size

22.

Elongation index is the percentage of particles:

a)

Length > 1.8×mean size

b)

Thickness < 0.6×mean size

c)

Width > 1.5×mean size

d)

Length < 0.5×mean size

23.

Angularity index measures:

a)

Sphericity

b)

Sharpness/shape of aggregate

c)

Fineness modulus

d)

Workability

24.

High flakiness and elongation index leads to:

a)

Improved workability

b)

Poor workability

c)

Higher strength

d)

Lower porosity

25.

Angular aggregates provide:

a)

Less voids

b)

More strength

c)

Better workability

d)

Smooth surface

26.

Rounded aggregates provide:

a)

More strength

b)

Better workability

c)

Higher crushing resistance

d)

Higher impact resistance

27.

Fine aggregates are those which pass through:

a)

2.36 mm sieve

b)

4.75 mm sieve

c)

10 mm sieve

d)

20 mm sieve

28.

Fineness modulus of fine aggregate lies between:

a)

2.0-3.5

b)

4.0-6.0

c)

6.0-8.0

d)

8.0-10.0

29.

A higher angularity index indicates:

a)

More rounded particles

b)

More angular particles

c)

Less voids

d)

Smoother surface

30.

The strength of concrete depends most on:

a)

Shape of aggregate

b)

Size of aggregate

c)

Water-cement ratio

d)

Fineness modulus

31.

The void ratio in well-graded aggregates is:

a)

High

b)

Low

c)

Maximum

d)

Negligible

32.

Aggregate crushing test is conducted using:

a)

Compression machine

b)

Impact machine

c)

Los Angeles machine

d)

Pycnometer

33.

The maximum size of aggregate for RCC work is generally:

a)

10 mm

b)

20 mm

c)

30 mm

d)

50 mm

34.

The effect of high-water absorption in aggregates:

a)

Increases strength

b)

Reduces durability

c)

Improves workability

d)

Improves density

35.

Angular aggregates are preferred in:

a)

Mass concrete

b)

High strength concrete

c)

Decorative concrete

d)

Pavement topping

36.

Which index indicates flat and thin particles?

a)

Elongation index

b)

Flakiness index

c)

Angularity index

d)

Impact index

37.

Soundness test of aggregates checks:

a)

Durability against weathering

b)

Impact resistance

c)

Crushing strength

d)

Water absorption

38.

Specific gravity of fine aggregate is measured by:

a)

Pycnometer test

b)

Le Chatelier test

c)

Vicat test

d)

Blaine test

39.

Slump test measures:

a)

Strength

b)

Workability

c)

Durability

d)

Soundness

40.

Low heat cement is used for:

a)

Pavements

b)

Dams

c)

Floors

d)

Mortar