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WorksheetsChapter 1: Cement
Total questions: 25
Worksheet time: 25mins
Why is natural cement used very limitedly?
Brown in Colour
Standard consistency is not met with
Sets too quickly
Particle size is too fine
What is the average particle size of cement?
15 microns
45 microns
75 microns
100 microns
What is the meaning of soundness of cement?
Ability to flow when mixed
Ability to make ringing noise when struck
Ability to form strong and sound structure
Ability to retain volume after setting
Time elapsed from the instance of adding water until paste ceases to behave as fluid is called:
Initial setting time
Final setting time
Intermediate setting time
Absolute setting time
Which of the below mentioned is not a result of field test performed on cement?
There should not be any lumps
It should feel cold when you put your hand in bag of cement
The colour should be blackish grey
It should not be gritty when rubbed with finger
Which equipment is used to test setting time of cement?
Core cutter
Vibrator
Universal testing machine (UTM)
Vicat apparatus
What is the initial setting time of cement?
1 hour
30 minutes
15 minutes
30 hours
Use of coarser cement particles leads to:
Low durability
Higher strength
Low consistency
Higher soundness
Wet cement can cause severe skin burns if not washed off with water immediately.
True
False
Green cement is:
Green coloured cement
Cement mixed with plant products
Cement mixed with recycled materials
Cement mixed with green algae
What is the depth the needle in Vicat apparatus should penetrate into the cement paste in
consistency test?
33-35 cm from bottom of mould
33-35 mm from top of mould
33-35 cm from top of mould
33-35 mm from bottom of mould
What is the most dominant constituent of cement?
Silica
Lime
Magnesia
Alumina
Nowadays, wet method of cement manufacturing is used.
True
False
In the figure below, what does ‘a’ represents?
Combustion chamber
Wash mill
Kiln
Dryer
What is ‘b’ and its function?
Water-plasticity
Lime-strength
Sulphur-soundness
Gypsum-control setting
How is the argillaceous material used in manufacture of cement stored?
Silos
Basins
Bags
Storage tanks
Which one of the below is rarely used as fuel in burning stage of wet process of cement
manufacturing?
Wood
Gas
Pulverised coal
Fuel oil
How much does a bag of cement weigh?
1 kg
25 kg
50 kg
35 kg
What is released during the production of clinker?
CaCO3
CO2
Ca(OH)2
CO
Which one of the below is not a feature of cement Kiln?
Employs alternate fuels
Natural alkaline environment
High temperature
Portable
Which of the following is not an advantage of rapid hardening cement?
Faster construction
Short curing period
Light in weight
Higher final setting time
What property does air-entraining cement provides?
Workability
Soundness
Fineness
Strength
What does grade 33 cement indicate?
Tensile strength of 33 kN/m2
Tensile strength of 33 N/mm2
Compressive strength of 33 kN/m2
Compressive strength of 33 N/mm2
Ordinary Portland cement (OPC) has been classified into how many grades?
2
3
10
5
After how many days is strength of cement is tested and graded according to the result?
7 days
28 days
1 day
14 days
