The method of addition polymerization is used for obtaining:
Polystyrene
Polypropylene
Polyvinylchloride
All of these
Correct Answer :
D. All of these
Related Questions
The proportions of lime and sand in the mortar normally used in brick construction are
1 : 2
1 : 4
1 : 6
1 : 8
Bitumen is generally obtained from
Organic material
Synthetic material
Petroleum product
Coal
The portion of the brick without a triangular corner equal to half the width and half the length, is called
Closer
Queen closer
King closer
Squint brick
Pick up the polymineralic rock from the following:
Quartz sand
Pure gypsum
Magnesite
Granite
Chemically, marble is known as
Metamorphic rock
Argillaceous rock
Calcareous rock
Siliceous rock
The sequence of refractory materials according to increasing melting points is:
Dolomite, Magnesia, Bauxite, Chromites
Bauxite, Chromites, Dolomite, Magnesia
Magnesia, Bauxite, Dolomite, Chromites
None of these
Pick up the correct statement from the following:
The substance which consists of one primary chemical, is known as monomer
The polymer consists of thousands of monomers joined together
The polymer molecule is called macro-molecule
All the above
After storage, the strength of cement
Decreases
Increases
Remains same
May increase or decrease
The most commonly used base for timber painting, is
Red lead
Zinc white
White lead
Titanium white
Pick up the correct statement from the following:
Solder material is an alloy which melts at a temperature above 400°C
Brazing is done at temperature above 600°C to 1100°C
Brazing joint is stronger than the solder joint
All the above
Hydraulic lime is obtained by
Burning of lime stone
Burning of kankar
Adding water to quick lime
Calcination of pure clay
Knots in timber are
Defects caused by crushing fibres
Splits radiating from the centre
Speckled strains
Signs of branches cut off
Water paint is a
White wash
Colour wash
Whiting
All the above
Pick up the correct statement from the following:
Rust is due to formation of oxides
Cast iron oxidises less
Steel oxidises most
All the above
Pick up the correct statement from the following:
Steel produced by open hearth process is milder than that obtained by the Bessemer process
Engineers prefer open hearth steel for structural purpose as it is more homogenous
Basic Bessemer process is suitable for converting poor ore containing a large proportion of sulphur and phosphorus into steel
All the above
The cast iron when heated to red heat with powdered red haematite in an oven for increasing its toughness, is converted to
Grey cast iron
White cast iron
Mottled cast iron
Toughed cast iron
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
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
A prime coat is given to steel work with
An oxide of iron paint
A mixture of white lead and lead paint
A special paint
Cement paint
The base material for distemper, is
Chalk
Lime
Lime putty
Cement wash
Slump test for concrete is carried out, to determine
Strength
Durability
Workability
Water content
Stones used for rubble masonry must be
Soft
Hard
Light
Heavy
Which of the following metamorphic rocks has the most weather resisting characteristics?
Marble
Quartzite
Slate
Lime stone
Number of bricks required for one cubic metre of brick masonry is
400
450
500
550
Cast iron is used for
Structural works in beams
Small sized water pipes
Columns and struts
None to these
Pick up the correct statement from the following:
Corrugated sheet iron is made by passing plain sheets between grooved rollers
Strength and stiffness of corrugated sheets are considerably increased
Corrugated sheets are generally used on slanting roofs
All the above
The most commonly used synthetic abrasive is
Aluminium carbide
Boric acid
Silicon
All of these
Veneering means
Carving out designs on timber planks
Chemically treating timber planks
Thick layer of superior wood glued to inferior wood
Thin layer of superior wood glued to inferior wood
If the ore impurities is
Clay, lime stone is used as flux
Lime stone, clay is used as flux
Quartz, lime stone and argillaceous iron ores are used as flux
All the above
The portion of the brick cut across its width and having its length equal to that of a full brick, is known as
Closer
Queen closer
King closer
Prince closer