Pick up the correct statement from the following:
Melamine is obtained from calcium carbide
Formaldehyde is prepared synthetically from methane
The melamine when reacted with formaldehyde forms the melamineformaldehyde resin
All the above
Correct Answer :
D. All the above
Related Questions
Rocks formed due to alteration of original structure due to heat and excessive pressure are called
Sedimentary rocks
Igneous rocks
Metamorphic rocks
None of these
Pegmatite is a/an
Intrusive igneous rock
Extrusive igneous rock
Sedimentary rock
Metamorphic rock
Quartzite, a metamorphic stone is
Hard
Brittle
Crystalline
All the above
A first class brick when immersed in cold water for 24 hours should not absorb water more than
15 %
20 %
22 %
25 %
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
The percentage of alumina in a good brick earth lies between
5 to 10 %
20 to 30 %
50 to 60 %
70 to 80 %
Shingle is
Decomposed laterite
Crushed granite
Water bound pebbles
Air weathered rock
Galvanising means covering iron with a thin coat of
Tin
Zinc
Glaze
Coal tar
Pig iron obtained from the furnace which is properly provided with fuel at a very high temperature, is called
Bessemer pig
Grey or foundry pig
White or forge pig
Mottled pig
Granite is not suitable for ordinary building purpose because
It cannot be polished
It is not a fire proof material
It is costly
It has less crushing strength
A stone is rejected if it absorbs water more than
5 %
10 %
15 %
20 %
Ultimate strength to cement is provided by
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
Pick up the correct statement from the following:
The average crushing strength of hand moulded bricks is 6000 t/m2
The average tensile strength of hand moulded brick is 200 t/m2
The average shearing strength of hand moulded brick is 600 t/m2
All the above
The commonly used thinner in oil paints, is
Naphtha
Turpentine
Both (a) and (b)
None the these
Pick up the correct statement from the following:
The phenol is carbolic acid
The phenol is either extracted from coal-tar or prepared from benzene
Phenol reacts with formaldehyde, to form phenol formaldehyde resin
All the above
Lime concrete is generally used for
Wall foundations
Flooring at ground level
Both (A) and (B)
Neither (A) nor (B)
Pick up the volcanic rock from the following:
Granite
Dolerite
Basalt
All the above
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
A mortar joint in masonry which is normal to the face of wall is known as
Bed joint
Wall joint
Cross joint
Bonded joint
In a rock calcium carbonate predominates. State whether it is:
Siliceous rock
Argillaceous rock
Calcareous rock
None of these
If water required for 1 bag of cement is 30 litres, the water cement ratio is:
0.40
0.50
0.60
None of these
The PVC doors and windows are preferred as they are
Rust proof
Rot proof
Water proof
All of these
Pick up the correct statement from the following:
In stone arches, the stones are placed with their natural beds radial
In cornices, the stones are placed with their natural beds as vertical
In stone walls, the stones are placed with their natural beds as horizontal
All the above
Based on its dry weight, a freshly felled tree may contain water
25 %
50 %
75 %
100 %
In the cement the compound quickest to react with water, is
Tri-calcium aluminate
Tetra-calcium alumino-ferrite
Tri-calcium silicate
Di-calcium silicate
Permanent magnets are made of high carbon steel and
15% of cobalt
20% of cobalt
35% of cobalt
45% of cobalt
The rocks which are formed due to cooling of magma at a relatively shallow depth from the earth's surface are called
Plutonic rocks
Hypabyssal rocks
Volcanic rocks
Igneous rocks
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
Knots in timber are
Defects caused by crushing fibres
Splits radiating from the centre
Speckled strains
Signs of branches cut off
Pug mill is used for
Preparation of clay
Moulding of clay
Drying of bricks
Burning of bricks