Which stone provides the calcareous component required for the manufacture of cement?
1.Lime
2.Limestone
3.Marble
4.Granite
A good brick should not absorb more than what percent of water when soaked?
1.15%
2.20%
3.30%
4.10%
A good brick when dropped from the height of 1 metre can:
1.Shatter
2.Not break
3.Break into 2 halves
4.Develop small cracks
After how many days is the strength of cement is tested and graded according to the result?
1.7 days
2. 28 days
3.1 day
4.14 days
Excess of oxides of iron makes the brick:
1.Red in colour
2.Black in colour
3.Dark blue in colour
4.Yellow in colour
Grade 43 OPC is used widely for:
1.High rise buildings
2.Plastering
3.House construction
4.Finishing works
Grade 43 OPC shall be rejected if it remains in bulk storage in the factory for:
1.More than 3 months
2. More than 1 month
3.More than 6 months
4.More than 4 months
How is the argillaceous material used in the manufacture of cement stored?
1.Silos
2.Basins
3.Bags
4.Storage tanks
How many constituents are there in the brick earth?
1.5
2.4
3.6
4. 8
How many major ingredients are present in the composition of cement?
1.8
2.5
3.10
4.6
How many methods of moulding brick earth are there?
1.3
2.5
3.2
4.4
How many types of cement are there based on the ability to set in presence of water?
1.2
2.3
3.4
4.5
How many types of the brick earth are there?
1.3
2.5
3.2
4.6
How much does a bag of cement weigh?
1.1 kg
2.25 kg
3.50 kg
4.35 kg
How much maximum percentage by mass of performance improvers can be added in grade 33 OPC?
1.0.5
2. 1
3.5
4.0.1
In the same figure in question 2, what is ‘b’ and its function?
1.Water-plasticity
2.Lime-strength
3.Sulphur-soundness
4.Gypsum-control setting
In what form should lime be present in the brick earth?
1.Paste
2.Lump
3.Clinker
4.Powder
Loamy, mild or sandy clay has __________ percentage of alkali?
1.5%
2.1%
3.4%
4.0%
Ordinary Portland cement (OPC) has been classified into how many grades?
1.2
2.3
3.10
4.5
Sulphur in cement is present in what amount?
1.0.5 – 6 g
2.1 – 2.5%
3.0.5 – 6%
4.1 – 2.5g
The depression provided in the face of a brick during its manufacturing is called:
1.Frog
2.Furrow
3.Groove
4.Scallop
The meaning of slop moulded bricks is:
1.Sand sprinkled inside mould
2.Insufficiently moulded bricks
3.Brittle and slimy bricks
4.Mould dipped in water
The presence of which of the below renders clay totally unsuitable for brick manufacture?
1.Kallar
2.Kankar
3. Hay
4.Lime
The process of kneading brick earth is called:
1.Pugging
2.Blending
3.Ramming
4.Tamping
The ratio of percentage of alumina to iron oxide in OPC 43 grade is:
1.3.5
2.0.66
3.0.1
4.0.05
Water proof cement is prepared by mixing ordinary cement with:
1.Resins
2.Water repellent chemicals
3.Sulpho-aminate
4.Metal stearates
What function does iron oxide perform in cement?
1.Increases strength
2.Makes cement sound
3.Increases setting time
4.Acts as flux
What happens to raw bricks if an excess of alumina is present?
1.Becomes hard
2.Becomes brittle
3.Decay
4.Shrinkage
What is the abbreviation of PPC?
1.Perfect Portland Cement
2.Portland Produced Cement
3.Portland Pozzolana Cement
4.Productive Portland Cement
What is the advantage of using precalciner?
1.Fine grained cement
2. Larger clinker size
3.Fuel efficiency
4.Sound cement
What is the harmful effect of presents of alkali in brick earth on bricks?
1.Discolourises bricks
2.Efflorescence
3.Porous bricks
4.Flaking
What is the recommended size of a brick?
1.20x10x10cm
2.20x9x9cm
3.19x9x9cm
4.19x8x8cm
What property does air-entraining cement provide?
1.Workability
2.Soundness
3.Fineness
4.Strength
Which is the most commonly employed drying method in India?
1.Hot floor drier
2.Tunnel drier
3.Natural drying
4.Blow drying
Which of the below is used to sound proof bricks?
1.Gypsum
2.Terracotta
3.Plastics
4.Ceramic
Which of the following bricks is not preferred?
1.Sharp-edged
2.Clamp burned
3.Sound-proofed
4.Kiln burned
Which of the following cannot be added in 33 grade OPC after burning stage?
1.Gypsum
2.Water
3.Colouring Agents
4.Clay
Which of the following is not a chemical change that takes place in the brick earth during burning?
1.Dehydration
2.Vitrification
3.Oxidation
4.Reduction
Which of the following is not a pozzolanic material?
1.Fly ash
2. Silica fume
3.Cinder
4.Slag
Which of the following is not an advantage of rapid hardening cement?
1.Faster construction
2.Short curing period
3.Light in weight
4.Higher final setting time
Which of the following leads to the formation of small pores in brick?
1.Iron pyrites
2.Pebbles
3.Organic matter
4.Alkalis
Which of the following types of cement is used in marine structures?
1.Expanding cement
2.High alumina cement
3.Blast furnace slag cement
4.White cement
Which one of the below is not a feature of cement Kiln?
1.Employs alternate fuels
2.Natural alkaline environment
3.High temperature
4.Portable
Which one of the below is rarely used as fuel in burning stage of wet process of cement manufacturing?
1.Wood
2.Gas
3.Pulverised coal
4.Fuel oil
Which one of the below is the first step in the preparation of brick earth process?
1.Digging
2.Site selection
3.Cleaning
4.Unsoiling
Which one of the below is the most important ingredient in the brick earth?
1.Alumina
2.Lime
3.Silica
4.Magnesia
Which one of the following is not a part of pug mill?
1.Vertical shaft
2.Hub
3.Cutting blades
4.Timber base
Which pair of the compound and coloured cement mentioned below is wrong?
1.Iron oxide-yellow
2.Cobalt-black
3.Chromium oxide-green
4.Manganese dioxide-brown
Why do bricks become brittle when excess silica is present?
1.Pores are created
2.Flaking occurs
3.Thermal stability is lost
4.Cohesion is lost
Why is the process of weathering performed?
1.To remove organic matter
2.To prepare for next process
3.To improve plasticity
4.To dry clay