The wedging is adopted for quarrying costly stratified rock such as
Laterite
Marble
Limestone
All the above
Correct Answer :
D. All the above
Related Questions
The percentage of alumina and silica in good fire clay vary respectively is
25, 75
30, 70
35, 65
All of these
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
For lime concrete,
Slump is 50 to 75 mm
Flexural strength at 90 days is 0.2 N/mm2
Compressive strength at 90 days is 1.5 N/mm2
All the above
The commonly used raw material in the manufacture of cement, is
Slate
Sand stone
Lime stone
Basalt
Pick up the correct statement from the following:
Hornblende mineral is brittle
Muscovite is also known as white mica and potash mica
Biotite is also known as black-mica
All the above
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
First class timber has an average life of
Less than one year
1 to 5 years
5 to 10 years
More than 10 years
Upto a maximum of 72% of iron, is available in
Magnetite
Limonite
Siderite
Iron pyrites
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
Good quality sand is never obtained from
River
Lake
Sea
Gravel powder
Percentage content of silica in window glass, is
40 to 45
50 to 55
60 to 65
70 to 75
The harmonious mixing of the clay ingredients, is known as
Weathering
Blending
Tempering
None of these
Stones used for ornamental work must be
Soft
Hard
Light
Heavy
Due to attack of dry rot, the timber
Cracks
Shrinks
Reduces to powder
None of these
The most fire resistant paints are:
Enamel paints
Aluminium paints
Asbestos paints
Cement paints
The timber having maximum resistance against white ants, is obtained from
Chir
Shishum
Sal
Teak
Pick up the rock which is not a sedimentary rock from the following:
Gravel
Sand stone
Gypsum
Dolerite
Non acid-resistant asbestos is:
Tremolite asbestos
Chrysotile asbestos
Amosite asbestos
None of these
Bitumen may be dissolved in
Carbondioxide
Water
Sodium chloride
Carbon disulphide
For preparing porcelains, the clay should be
Sufficiently pure
Of high degree of tenacity
Of good plasticity
All the above
Which of the following bricks are used for lining of furnaces?
Over-burnt bricks
Under-burnt bricks
Refractory bricks
First class bricks
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
The presence of sand in brick earth prevents:
Cracking of bricks
Shrinkage of bricks
Warping of bricks
None of these
Snowcrete is one of the patent forms of
Distempers
Water proof cement paints
Enamel paints
Cellulose paints
The percentage of alumina in a good brick earth lies between
5 to 10 %
20 to 30 %
50 to 60 %
70 to 80 %
Paints with white lead base are suitable for painting of
Wood work
Iron work
Both wood work and iron work
None of the above
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
Which of the following timbers is suitable for making sports goods?
Mulberry
Mahogany
Sal
Deodar
The lime which contains mainly calcium oxide and slacks with water, is
Fat lime
Quick lime
Hydraulic lime
Poor lime
Which of the following metamorphic rocks has the most weather resisting characteristics?
Marble
Quartzite
Slate
Lime stone