For slaking of 10 kg of CaO, the theoretical amount of water is
2.2 kg
1.5 kg
3.2 kg
None of these
Correct Answer :
C. 3.2 kg
Related Questions
A first class brick when immersed in cold water for 24 hours should not absorb water more than
15 %
20 %
22 %
25 %
Asbestos is
Corrugated sheet used for roofing
An incombustible fire proof material
An organic substance
All the above
Gypsum consists of
H₂S and CO₂
CaSO4 and H₂O
Lime and H₂O
CO₂ and calcium
The yield strength and tensile strength of low carbon steel may be improved by the addition of
Manganese
Chromium
Nickel
Vanadium
The age of a tree can be known by examining
Cambium layer
Annular rings
Medullary rays
Heart wood
The property by virtue of which lime sets under water, is known as
Slacking
Setting
Hydraulicity
Calcining
Shingle is
Decomposed laterite
Crushed granite
Water bound pebbles
Air weathered rock
Pick up the polymineralic rock from the following:
Quartz sand
Pure gypsum
Magnesite
Granite
Based on flow quality, the sequence of pipes is
A.C. pipes, G.I. pipes, C.I. pipes, PVC pipes
C.I. pipes, G.I. pipes, A.C. pipes, PVC pipes
C.I. pipes, G.I. pipes, PVC pipes, A.C. pipes
None of these
Quartzite is a
Metamorphic rock
Argillaceous rock
Calcareous rock
Siliceous rock
Which one of the following is used for preparing porcelain?
Clay
Feldspar
Quartz
All of these
Slump test for concrete is carried out, to determine
Strength
Durability
Workability
Water content
The rocks formed by gradual deposition, are called
Sedimentary rocks
Igneous rocks
Metamorphic rocks
None of these
To retard the initial setting time of cement, the compound responsible, is
Tri-calcium silicate
Gypsum
Di-calcium silicate
Tri-calcium aluminate
Which of the following metamorphic rocks has the most weather resisting characteristics?
Marble
Quartzite
Slate
Lime stone
Pick up the correct statement from the following:
Plastics have generally low melting point
The coefficient of thermal expansion of plastics is about three times than that of steel
The acoustical boards prepared by impregnating fibre-glass with phenolic resins has absorption coefficient of about 0.67
All the above
Crushing strength of a good building stone should be more than
50 MPa
100 MPa
150 MPa
200 MPa
A good building stone should not absorb water more than
5 %
10 %
15 %
20 %
The main ingredient of a good quality brick earth, is
Magnesia
Lime
Silica
Alumina
During pudding
Molten metal is kept clear of the fuel
Carbon is converted into carbonic acid gas
Silicon forms a slag
All the above
Plastic bitumen is generally used for
Road pavements
Expansion joints
Crack fillings
None to these
Quick lime
Generates heat when added to water
Reacts with carbon dioxide
May be used for white-washing
All the above
Minimum required water cement ratio for a workable concrete, is
0.30
0.40
0.50
0.60
Plywood is made by bonding together thin layers of wood in such a way that the angle between grains of any layer to grains of adjacent layers is
0°
30°
45°
90°
The presence of original rounded surface on the manufactured piece of timber, is called
Wane
Torn grain
Diagonal grain
Chipmark
The stretcher bond in brick masonry can be used only when the thickness of wall is
90 mm
180 mm
190 mm
280 mm
Basalt is
Sedimentary rock
Metamorphic rock
Extrusive igneous rock
Intrusive igneous rock
Pick up the correct statement from the following:
The baked earth is called terra-cotta
The articles prepared from clay which is burnt at low temperature and cooled down slowly, are called earthen-ware
The articles prepared from refractory clays which as mixed with stone and crushed pottery, are called stone ware
All the above
Which one of the following polymers is obtained from condensation polymerization?
Phenol formaldehyde
Carbamide
Melamine-formaldehyde
All of these
The most valuable timber may be obtained from
Chir
Shishum
Sal
Teak