Basalt is
Sedimentary rock
Metamorphic rock
Extrusive igneous rock
Intrusive igneous rock
Correct Answer :
C. Extrusive igneous rock
Related Questions
Lime stones are generally known as
Aqueous rocks
Sedimentary rocks
Stratified rocks
All the above
For filling cracks in masonry structures, the type of bitumen used, is
Cut-back bitumen
Bitumen-emulsion
Blown bitumen
Plastic bitumen
Pick up the correct statement from the following:
For thin structures subjected to wetting and drying, the water cement ratio should be 0.45
For mass concrete structures subjected to wetting and drying, the water ratio should be 0.55
For thin structures which remain continuously under water, the watercement ratio by weight should be 0.55
All the above
The commonly used lime in white washing, is
White lime
Fat lime
Hydraulic lime
Quick lime
To retard the initial setting time of cement, the compound responsible, is
Tri-calcium silicate
Gypsum
Di-calcium silicate
Tri-calcium aluminate
Plywood is made from
Common timber
Bamboo fibre
Teak wood only
Asbestos sheets
Pick up the correct statement from the following:
Acid test is done to find out the weathering quality of stones
Attrition test is done to find out the rate of wear of stones which are used in road construction
Crushing test is done to find out the compressive strength of the stone
All the above
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
Pick up the correct statement from the following:
The percentage of absorption for firebricks varies from 5 to 10
The percentage of silica in silica bricks is to the extent of about 95 to 97 percent
Roughly 1 to 2 percent of lime in silica bricks is added to act as binding material
All the above
Vanadium steel is generally used for
Railway switches and crossing
Bearing balls
Magnets
Axles and springs
The melting point of silica is:
1570°C
1630°C
1730°C
1850°C
Proper amount of entrained air in concrete results in (i) Better workability (ii) Better resistance to freezing and thawing (iii) Lesser workability (iv) Less resistance to freezing and thawing The correct answer is
(i) and (ii)
(i) and (iv)
(ii) and (iii)
(iii) and (iv)
Shingle is
Decomposed laterite
Crushed granite
Water bound pebbles
Air weathered rock
The PVC doors and windows are preferred as they are
Rust proof
Rot proof
Water proof
All of these
Plastic bitumen is generally used for
Road pavements
Expansion joints
Crack fillings
None to these
The property by virtue of which lime sets under water, is known as
Slacking
Setting
Hydraulicity
Calcining
The portion of a brick cut to form angles other than right angles in plan, is known as
Queen closer
King closer
Closer
Squint brick
Iron ore may contain
Carbon
Silicon
Phosphorus and manganese
All the above
A heavy stone is suitable for
Arches
Rubble masonry
Roads
Retaining walls
The type of bond provided in brick masonry for carrying heavy loads is
Single Flemish bond
Double Flemish bond
English bond
Zigzag bond
Knots in timber are
Defects caused by crushing fibres
Splits radiating from the centre
Speckled strains
Signs of branches cut off
Asphalt is obtained from
Petroleum distillation
Bitumen distillation
Plastic distillation
None of these
The steel used for the manufacture of rails, is
Bessemer steel
Mild steel
Cast steel
Stainless steel
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
For the manufacture of plywood, veneers are placed so that grains of adjacent veneers
Run at right angles
Parallel
Inclined at 45°
Inclined at 60°
Pick up the correct statement from the following:
Alexander Parkes, a Scottish chemist prepared a hard material by mixing camphor and alcohol with nitro cellulose and called it, as Parkesite
Dr. L. Bakeland, a Belgian scientist prepared a product known as Bakelite
Pollark, an Austrian scientist prepared a substance from urea and formaldehyde and called it Plastic
All the above
With increase in moisture content, the bulking of sand
Increases
Decreases
First increases to a certain maximum value and then decreases
First decreases to a certain minimum value and then increases
The timber having maximum resistance against white ants, is obtained from
Chir
Shishum
Sal
Teak
Porcelain is used as:
Sanitary wares
Electric insulators
Storage vessels
Reactor chambers
Pick up the correct statement from the following:
The free quartz suddenly expands at a temperature lower than 600°C
The lime stone resists fire upto about 800°C and at higher temperature it splits into CaO and CO2
The sand stone with silicates resist a fire in a better way
All the above