Due to attack of dry rot, the timber
Cracks
Shrinks
Reduces to powder
None of these
Correct Answer :
C. Reduces to powder
Related Questions
Wrought iron is manufactured from pig iron by
Refining
Pudding
Shingling
All the above
For sanitary pipes and chemical stonewares,
Salt glazing is used
Lead glazing is used
Opaque glazing is used
None of these
Glazing is used to make earthenware
Hard
Soft
Porous
Impervious
The curved swellings from the growth of layers or wounds left after branches are cut off in an irregular manner are known as
Knots
Rindgalls
Burls
None of these
The variety of pig iron used for manufacture of wrought iron, is
Bessemer pig
Grey or foundry pig
White forge pig
Mottled pig
Non acid-resistant asbestos is:
Tremolite asbestos
Chrysotile asbestos
Amosite asbestos
None of these
The ratio of the thickness of web to that of flange of steel rolled structural beams and channels is
Less than 1
Equal to 1
Greater than 1
Less than 1 in beams but greater than 1 in channels
Three basic raw materials which are needed in large quantities for production of steel are
Iron ore, coal and sulphur
Iron ore, carbon and sulphur
Iron ore, coal and lime stone
Iron ore, carbon and lime stone
The compound of Portland cement which reacts immediately with water and also sets first is
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
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
Dry rot
Cracks the timber
Reduces the strength of timber
Reduces the timber to powder
Spoils the appearance of timber
Sand stone is
Sedimentary rock
Metamorphic rock
Igneous rock
Volcanic rock
Addition of pozzolana to ordinary Portland cement increases
Bleeding
Shrinkage
Permeability
Heat of hydration
A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than
10 %
15 %
20 %
25 %
Ultimate strength to cement is provided by
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
A queen closer is a
Brick laid with its length parallel to the face or direction of wall
Brick laid with its breadth parallel to the face or direction of wall
Brick having the same length and depth as the other bricks but half the breadth
Brick with half the width at one end and full width at the other
The rock generally used for roofing, is
Granite
Basalt
Slate
Pumice
Polymerization helps to improve the property of
Strength
Rigidity
Elasticity
All of these
The rocks having alumina or clay as their major constituents are known as
Siliceous rocks
Argillaceous rocks
Calcareous rocks
Sedimentary rocks
Mastic asphalt is
Acid resisting material
Non-corrosive material
Corrosive material
Heating-resisting material
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
For the manufacture of stainless steel, steel is mixed with
Chromium
Nickel
Tungsten
None of these
Fibre boards can be
Distempered
Painted
Painted and distempered
Used for furniture
For one cubic metre of brick masonry, number of bricks required, is
400
425
450
500
Number of bricks required for one cubic metre of brick masonry is
400
450
500
550
Minimum required water cement ratio for a workable concrete, is
0.30
0.40
0.50
0.60
Plastic bitumen is generally used for
Road pavements
Expansion joints
Crack fillings
None to these
In arches, stratified stones are placed so that their planes are
Parallel
Perpendicular
Radial
None of these
Which of the following is a rock?
Quartz
Mica
Gypsum
None of the above
Good quality cement contains higher percentage of
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite