The presence of sand in brick earth prevents:
Cracking of bricks
Shrinkage of bricks
Warping of bricks
None of these
Correct Answer :
C. Warping of bricks
Related Questions
The maximum quantity of calcium chloride used as an accelerator in cement in percentage by weight of cement is
1
2
3
4
Good quality stones must
Be durable
Be free from clay
Resist action of acids
All the above
If P is the percentage of water required for normal consistency, water to be added for determination of initial setting time, is
0.70 P
0.75 P
0.80 P
0.85 P
Iron ore may contain
Carbon
Silicon
Phosphorus and manganese
All the above
The initial setting time of hydraulic lime, is
30 minutes
60 minutes
90 minutes
120 minutes
Study the following statements. (i) Hydraulic lime is suitable for white washing, (ii) Fat lime is suitable for whitewashing, (iii) Hydraulic lime is suitable for making mortar, (iv) Fat lime is suitable for making mortar. The correct answer is
(i) and (iv)
(ii) and (iii)
(i) and (ii)
(iii) and (iv)
Gypsum consists of
H₂S and CO₂
CaSO4 and H₂O
Lime and H₂O
CO₂ and calcium
A stone is rejected if it absorbs water more than
5 %
10 %
15 %
20 %
Duco is one of the patent forms of
Emulsion paints
Plastic paints
Bituminous paints
Cellulose paints
Rapid hardening cement attains early strength due to
Larger proportion of lime grounded finer than normal cement
Lesser proportion of lime grounded coarser than normal cement
Lesser proportion of lime grounded finer than normal cement
Excess percentage of gypsum
Polymerization helps to improve the property of
Strength
Rigidity
Elasticity
All of these
The nominal size of the modular brick is
190 mm × 90 mm × 80 mm
190 mm × 190 mm × 90 mm
200 mm × 100 mm × 100 mm
200 mm × 200 mm × 100 mm
The minimum compressive strength of 1st class bricks should be
75 kg/cm2
90 kg/cm2
100 kg/cm2
120 kg/cm2
A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than
10 %
15 %
20 %
25 %
Based on its dry weight, a freshly felled tree may contain water
25 %
50 %
75 %
100 %
The rocks which are formed due to pouring of magma at the earth's surface are called
Plutonic rocks
Hypabyssal rocks
Volcanic rocks
Igneous rocks
The coefficient of hardness of stones used in road work should be greater than
10
12
15
17
Slump test for concrete is carried out, to determine
Strength
Durability
Workability
Water content
The kiln which may work throughout the year, is
Clamp
Bull's kiln
Hoffman's kiln
None of these
The pressure acting on the stones in stone masonry construction should be
Along the direction of bedding planes
At 45° to the direction of bedding planes
At 60° to the direction of bedding planes
Perpendicular to the direction of bedding planes
Pick up the correct statement from the following:
Rusting is caused due to combined action of air, moisture and carbon dioxide
During rusting, first ferrous bicarbonates are formed
On further oxidation ferrous bicarbonates get converted to ferric bicarbonates
All the above
Due to attack of dry rot, the timber
Cracks
Shrinks
Reduces to powder
None of these
Pick up the correct statement from the following:
Styrene resin is produced from ethylene which is made from petroleum
Styrene resin is light in weight
Styrene resin transmits ultraviolet waves of light
All the above
A rock contains only one mineral. It is called
Homogeneous
Non-homogeneous
Monomineralic
Polymineralic
Bitumen may be dissolved in
Carbondioxide
Water
Sodium chloride
Carbon disulphide
Stones used for the construction of retaining walls must be
Soft
Hard
Light
Heavy
Sapwood consists of
Innermost annular rings around the pith
Portion of timber between heartwood and cambium layer
Thin layers below the bark
Thin fibre which extends from the pith outwards and holds the annular rings together
Fibre boards can be
Distempered
Painted
Painted and distempered
Used for furniture
Lime putty
Is made from hydraulic lime
Is made by adding lime to water
Can be used only upto three days
All of above
Chemically, marble is known as
Metamorphic rock
Argillaceous rock
Calcareous rock
Siliceous rock