Acid-resistant cement and gypsum are examples of _________ materials.
1.Air binding
2.Hydraulic binding
3.Autoclave binding
4.Sound binding
Circular finished stones are generally used for:
1.Pillar
2.Tombstone
3.Landscaping
4.Column
Common glass is mainly a mixture of ___________
1.Calcium silicate, potassium silicate and copper silicate
2.Sodium silicate, iron silicate and calcium silicate
3.Aluminium silicate, potassium silicate and iron silicate
4.Magnesium silicate, potassium silicate and zinc silicate
Dressing of stones is carried out to:
1.To provide employment to people
2.To make transport of stones to site easy and economic
3.To reduce water content of stone
4.To avoid further works on the stone
Dynamite is a more effective explosive than gelignite.
1.True
2.False
Fat lime is also called _________
1.Water lime
2.Pure lime
3.Impure lime
4.Lean lime
Ferric oxide gives a very light yellow tint to the glass while ferrous oxide imparts a green colour.
1.True
2.False
Fine sand is generally used for which of the following works?
1.Masonry
2.Concrete structures
3.Plastering
4.Grinding and polishing
Fire-resistant mortar is obtained by the addition of ____________ to the powder of fire-bricks.
1.Silica
2.Sodium silicate
3.Aluminous cement
4.Caustic soda
Glass can be made opaque by grinding the surface of the glass with _________
1.Mortar
2.Flint
3.Alcohol
4.Emery
he process of heating to redness in the presence of air is called __________
1.Hydraulicity
2.Setting
3.Roasting
4.Calcination
Heavy mortars have a bulk density equal to greater than _________
1.500 kg/m3
2.1000 kg/m3
3.1500 kg/m3
4.2500 kg/m3
How many types of dressings are there with respect to the place of work?
1.4
2.3
3.2
4.None
In order to develop hydraulicity, it is necessary to have _________ and _________ present in chemical combination with the limestone.
1.Alumina and carbon
2.Magnesium and carbon
3.Silica and carbon
4.Alumina and silica
In the silvering of glass, a thin coat of ______ is first applied on which silver is then deposited.
1.Tin
2.Zinc
3.Iron
4.Copper
Increase in volume of the sand due to the presence of moisture is called ___________ of sand.
1.Bulking
2.Normalising
3.Shrinkage
4.Titrating
Kankar is an impure limestone while white chalk is pure limestone.
1.True
2.False
Lime is obtained from the calcination of ___________
1.Lime-silica
2.Sandstone
3.Limestone
4.Lime-concrete
Lime mortar should be consumed within ___________ after its preparation.
1.2 days
2.14 days
3.36 days
4.36 hours
Litharge is _________
1.Lead trioxide
2.Lead sesquioxide
3.Lead dioxide
4.Lead monoxide
On the basis of the size of grains, the sand is classified into three categories – coarse, fine, and gravelly sand.
1.True
2.False
Quarry faced finished stones are also called:
1.Reticulated finish
2.Hammer faced finished
3.Rock faced stones
4.Plain finish
Sand is a fine grained component in soil.
1.True
2.False
Slaked lime is __________
1.Calcium oxide
2.Hydrated oxide of calcium
3.Calcium carbonate
4.Calcium silicate
Stones are obtained from rocks that are made up of:
1.Ores
2.Minerals
3. Chemical compounds
4.Crystals
The chemical composition of quick lime is ____________
1.CaS
2.CaO
3.MgO
4.MgS
The process of adding cement in order to improve the quality of lime mortar is known as __________
1.Gauging
2.Piling
3.Slaking
4.Reinforcing
The process of slow and gradual cooling of glass articles is known as _________
1.Pressing
2.Rolling
3.Annealing
4.Spinning
To detect the presence of organic impurities in sand, solution of ___________ is used.
1.Silver chloride
2.Sodium acetate
3.Sodium hydroxide
4.d) Calcium carbonate
What is sand blasting?
1.Process of making carvings on stone surface
2.Quarrying technique
3.Dressing type
4.Process of using sand to blast stone surface
What is sand composed of?
1.Silica
2.Silicon
3.Silicon oxide
4.Quartz
What is the colour of river sand?
1.Black
2.Brown
3.Grey
4.White
What is the colour of sea sand?
1.Blue
2.Light brown
3.Black
4.Red
What is the relation between LLR (Line of Least Resistance) and amount of explosives to be used?
1.Higher the LLR, higher the amount of explosive
2.Higher the LLR, lesser the amount of explosive
3.10% more explosive for every 1m of LLR
4.10% less explosive for every 1m of LLR
What is used to accelerate the process of rubbing in rubbed finish dressing?
1.Water
2.Water and sand
3.Clay
4.Pebbles
Which of the following ions causes the cement to set quickly?
1.Sulphate
2.Carbonate
3.Chloride
4.Nitrate
Which of the following is a hand tool used for quarrying?
1.Plier
2.Hammer
3.Quarrying wire
4.XSM
Which of the following is a raw material for common glass?
1.Lead dioxide
2.Potassium bicarbonate
3.Salt cake
4.Litharge
Which of the following is added to the glass in order to make its colour green?
1.Cobalt oxide
2.Magnesium dioxide
3.Sodium oxide
4.Chromium sesquioxide
Which of the following is added to the glass in order to make its colour violet?
1.Ferric oxide
2.Manganese dioxide
3.Tin oxide
4.Copper oxide
Which of the following is an autoclave binding material?
1.Quick lime
2.Hydraulic lime
3.Gypsum
4.Lime-silica
Which of the following is not a property of fat lime?
1.It readily hardens
2.The colour of fat lime is perfectly white
3.Fat lime slakes vigorously
4.Fat lime sets slowly in the presence of air
Which of the following is not a property of good sand?
1.Good sand should be chemically inert
2.It should be clean
3.It should not contain any organic matter
4.It must contain salts that can attract moisture from the atmosphere
Which of the following is not a property of the packing mortar used to pack oil wells?
1.It should be water-resistant
2.It should have low homogeneity
3.It should have resistance to subsoil water pressure
4.It should be able to form solid waterproof plugs in voids of rocks
Which of the following is not an explosive used for blasting?
1.Gelignite
2.Gunpowder
3.Flash powder
4.Nitrocellulose
Which of the following substances is not used as a decolorizer in the manufacturing of glass?
1.Potassium carbonate
2.Antimony oxide
3.Cobalt oxide
4.Manganese dioxide
Which type of mortar should be used for damp proof courses and cement concrete roads?
1.Lime mortar (1:2)
2.Lime mortar (1:3)
3.Cement mortar (1:2)
4.Lime cinder mortar (1:4)
X-ray shielding mortar is a lightweight mortar having a bulk density of less than 1500 kg/m3.
1.True
2.False
_______ is used to indicate pieces of broken glass or waste glass.
1.Sodium bicarbonate
2.Cullet
3.Decolorizer
4.Sand
_________ is adopted to prepare small quantities of lime mortar.
1.Grinding
2.Grilling
3.Pounding
4.Digging