Deck 2: Cement and Brick Earth - Properties and Testing

Question 1

What is the average particle size of cement?

A)15 microns
B)45 microns
C)75 microns
D)100 microns

Answer 1

15 microns

Question 2

What is the meaning of soundness of cement?

A)Ability to flow when mixed
B)Ability to make ringing noise when struck
C)Ability to form strong and sound structure
D)Ability to retain volume after setting.

Answer 2

Ability to retain volume after setting.

Question 3

Time elapsed from the instance of adding water until paste ceases to behave as fluid is called:

A)Initial setting time
B)Final setting time
C)Intermediate setting time
D)Absolute setting time

Answer 3

Initial setting time

Question 4

Which of the below mentioned is not a result of field test performed on cement?

A)There should not be any lumps
B)It should feel cold when you put your hand in bag of cement
C)The colour should be blackish grey
D)It should not be gritty when rubbed with finger

Question 5

Which equipment is used to test the setting time of cement?

A)Core cutter
B)Vibrator
C)Universal testing machine (UTM)
D)Vicat apparatus

Question 6

What is the initial setting time of cement?

A)1 hour
B)30 minutes
C)15 minutes
D)30 hours

Question 7

Use of coarser cement particles leads to:

A)Low durability
B)Higher strength
C)Low consistency
D)Higher soundness

Question 8

Green cement is:

A)Green coloured cement
B)Cement mixed with plant products
C)Cement mixed with recycled materials
D)Cement mixed with green algae

Question 9

What is the depth the needle in Vicat apparatus should penetrate into the cement paste in consistency test?

A)33-35 cm from bottom of the mould
B)33-35 mm from top of the mould
C)33-35 cm from top of the mould
D)33-35 mm from bottom of the mould

Question 10

What is the most dominant constituent of cement?

A)Silica
B)Lime
C)Magnesia
D)Alumina

Question 11

Deficiency of lime in cement leads to:

A)Unsound cement
B)Disintegration of cement
C)Quick setting of cement
D)Exp

Question 12

What effect does calcium sulphate have on cement?

A)Retards setting action
B)Acts as flux
C)Imparts colour
D)Reduces strength

Question 13

Which of the following adds a quick-setting property to cement?

A)Magnesium oxide
B)Silicon dioxide
C)Iron oxide
D)Aluminium oxide

Question 14

Which of the following imparts greenish grey colour to cement?

A)Calcium silicate
B)Calcium aluminate
C)Calcium aluminate ferrite
D)Calcium carbonate

Question 15

Excess of Alkali in cement results in:

A)Dry cement paste
B)Efflorescence
C)Less plasticity
D)Unsound cement

Question 16

What function does iron oxide perform in cement?

A)Increases strength
B)Makes cement sound
C)Increases setting time
D)Acts as flux

Question 17

What is the abbreviation of PPC?

A)Perfect Portland Cement
B)Portland Produced Cement
C)Portland Pozzolana Cement
D)Productive Portland Cement

Question 18

Which of the following is not an advantage of rapid hardening cement?

A)Faster construction
B)Short curing period
C)Light in weight
D)Higher final setting time

Question 19

How many types of cement are there based on the ability to set in presence of water?

A)2
B)3
C)4
D)5

Question 20

What property does air-entraining cement provide?

A)Workability
B)Soundness
C)Fineness
D)Strength

Question 21

How many constituents are there in the brick earth?

A)5
B)4
C)6
D)8

Question 22

Which one of the below is the most important ingredient in the brick earth?

A)Alumina
B)Lime
C)Silica
D)Magnesia

Question 23

In what form should lime be present in the brick earth?

A)Paste
B)Lump
C)Clinker
D)Powder

Question 24

Excess of oxides of iron makes the brick:

A)Red in colour
B)Black in colour
C)Dark blue in colour
D)Yellow in colour

Question 25

What happens to raw bricks if an excess of alumina is present?

A)Becomes hard
B)Becomes brittle
C)Decay
D)Shrinkage