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Q.1
Calcination of iron ores is done
To remove moisture
To remove carbonic acid
By roasting in heaps
All the above
Q.2
The size of mould for bricks, is generally kept
A little large to specified size
A little small to specified size
Equal to specified size
10% larger than specified size
Q.3
Plaster of Paris is obtained by calcining
Bauxite
Gypsum
Lime stone
None of these
Q.4
Which of the following is a mineral?
Basalt
Granite
Quartz
Syenite
Q.5
Which of the following timbers is suitable for making sports goods?
Mulberry
Mahogany
Sal
Deodar
Q.6
For one cubic metre of brick masonry, number of bricks required, is
400
425
450
500
Q.7
The maximum quantity of calcium chloride used as an accelerator in cement in percentage by weight of cement is
1
2
3
4
Q.8
The weight of a good quality brick when immersed in water for a period of 16 hours should not exceed the weight of dry brick
20 %
15 %
10 %
None of these
Q.9
The foliated structure is very common in
Sedimentary rocks
Igneous rocks
Metamorphic rocks
None of these
Q.10
The rocks formed by gradual deposition, are called
Sedimentary rocks
Igneous rocks
Metamorphic rocks
None of these
Q.11
Stones used for the construction of retaining walls must be
Soft
Hard
Light
Heavy
Q.12
Invar contains
12% of nickel
24% of nickel
30% of nickel
36% of nickel
Q.13
Seasoning of timber is done for
Increasing moisture content
Decreasing moisture content
Increasing strength of timber
None to these
Q.14
The initial setting time of lime-pozzolana, is
30 minutes
60 minutes
90 minutes
120 minutes
Q.15
Jhumb bricks are
Under burnt
Over burnt
Kutcha
None of these
Q.16
1200 kg
1500 kg
1800 kg
2000 kg
Q.17
The specific gravity of marble, is
2.50
2.60
2.66
2.72
Q.18
A good brick earth should contain:
About 20% to 30% of alumina
About 50% to 60% of silica
Not more than 5% of lime
All the above
Q.19
For preparing porcelains, the clay should be
Sufficiently pure
Of high degree of tenacity
Of good plasticity
All the above
Q.20
Granite is not suitable for ordinary building purpose because
it can not be polished
it is not a fire proof material
it is costly
it has less crushing strength
Q.21
The frog of the brick in a brick masonry is generally kept on
Bottom face
Top face
Shorter side
Longer side
Q.22
Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth?
Lime stone and alumina
Silica and alkalies
Alumina and iron
Alkalies and magnesium
Q.23
Good quality cement contains higher percentage of
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
Q.24
The cracks caused by shrinkage of the exterior surface of the wood exposed to atmosphere, are called:
Radial shakes
Heart shakes
Wind cracks
Twisted fibres
Q.25
The most commonly used synthetic abrasive is
Aluminium carbide
Boric acid
Silicon
All of these
Q.26
A bull nose brick is not used for
Rounding off sharp corners
Pillars
Decoration purpose
Arches
Q.27
The lime which contains mainly calcium oxide and slacks with water, is
Fat lime
Quick lime
Hydraulic lime
Poor lime
Q.28
Lacquer is
Oil paint
Distemper
Spirit varnish
None to these
Q.29
Bessemer process is used for the manufacture of
Pig iron
Cast iron
Wrought iron
Steel
Q.30
For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of
1 : 2
1 : 3
1 : 4
1 : 6
Q.31
Bullet proof glass is made of thick glass sheet sandwiched by a layer of
Steel
Stainless steel
High test plastic
Chromium plate
Q.32
Gypsum is a
Mechanically formed sedimentary rock
Igneous rock
Chemically precipitated sedimentary rock
Metamorphic rock
Q.33
Excess of alumina in brick earth makes the brick
Impermeable
Brittle and weak
To lose cohesion
To crack and warp on drying
Q.34
The main constituent which imparts hydraulicity to hydraulic lime is
Calcium oxide
Silica
Clay
Water
Q.35
Sandstone is a
(i) Sedimentary rock
(ii) Aqueous rock
(iii) Siliceous rock
Only (i)
Both (i) and (ii)
Both (i) and (iii)
All (i), (ii) and (iii)
Q.36
The most important tool in brick laying for lifting and spreading mortar and for forming joints is
Trowel
Square
Bolster
Scutch
Q.37
French polish is
Oil paint
Distemper
Spirit varnish
None to these
Q.38
If the iron ore contains clay as an impurity, the flux added during calcination, is
Clay
Lime stone
Argillaceous iron ore
All the above
Q.39
Which of the following sedimentary rocks changes into quartzite by metamorphic action?
Sand stone
Lime stone
Shale
Gypsum
Q.40
Non acid-resistant asbestos is:
Tremolite asbestos
Chrysotile asbestos
Amosite asbestos
None of these
Q.41
Bitumen completely dissolves in
Carbon bisulphide
Chloroform
Coal tar
All of these
Q.42
Brass is an alloy of
Copper and zinc
Zinc and lead
Tin and silver
Zinc and nickel
Q.43
The most fire resistant paints are:
Enamel paints
Aluminium paints
Asbestos paints
Cement paints
Q.44
Assertion A : Pure lime takes a long time to develop adequate strength.
Reason R : Pure lime has slow hardening characteristics.
Select your answer according to the coding system given below:
Both A and R is true and R is correct explanation of A
Both A and R is true and R is not a correct explanation of A
A is true but R is false
A is false but R is true
Q.45
Rapid hardening cement contains
Tri-calcium silicate
Tri-calcium aluminate
Tetra-calcium alumino-ferrite
Di-calcium silicate
Q.46
The amount of water used for one kg of distemper is
0.2 liter
0.4 liter
0.6 liter
0.8 liter
Q.47
For the manufacture of Portland cement, the proportions of raw materials used, are
Lime 63% ; silica 22% ; other ingredients 15%
Lime 22% ; silica 63% ; other ingredients 15%
Silica 40% ; lime 40% ; other ingredients 20%
Silica 70% ; lime 20% ; other ingredients 10%
Q.48
Galvanising means covering iron with a thin coat of
Tin
Zinc
Glaze
Coal tar
Q.49
Assertion A : Normally turpentine oil is recommended as thinner for indoor painting.
Reason R : Turpentine oil is costlier than other thinners.
Select your answer according to the coding system given below:
Both A and R is true and R is the correct explanation of A
Both A and R is true but R is not the correct explanation of A
A is true but R is false
A is false but R is true
Q.50
Assertion A : Paints with white lead base are not recommended for painting of iron works.
Reason R : Paints with white lead base do not check rusting of iron.
Select your answer according to the coding system given below:
Both A and R is true and, R is the correct explanation of A
Both A and R is true but R is not the correct explanation of A
A is true but R is false
A is false but R is true
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