Stones used for the construction of retaining walls must be
Soft
Hard
Light
Heavy
Correct Answer :
D. Heavy
Related Questions
Calcination of iron ores is done
To remove moisture
To remove carbonic acid
By roasting in heaps
All the above
Jhumb bricks are
Under burnt
Over burnt
Kutcha
None of these
According to ISI, bitumen is classified into
2 grades
4 grades
8 grades
10 grades
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
French polish is
Oil paint
Distemper
Spirit varnish
None to these
Pug mill is used for
Preparation of clay
Moulding of clay
Drying of bricks
Burning of bricks
The low voltage porcelain is mainly used for
Switch block
Insulating tubes
Lamp sockets
All of these
Sewer pipes are made of
Earthen ware
Stone ware
Refractory clay
All the above
Stucco paints are suitable for
Stone masonry
Brick walls
Both (A) and (B)
Neither (A) nor (B)
The coefficient of hardness of stones used in road work should be greater than
10
12
15
17
The most fire resistant paints are:
Enamel paints
Aluminium paints
Asbestos paints
Cement paints
If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called
Bessemer pig
Grey or foundry pig
White or forge pig
Mottled pig
Bitumen felt is used for
Water proofing
Damp proofing
Both (A) and (B)
Neither (A) nor (B)
Pick up the correct statement from the following:
The lime in excess makes the cement unsound and causes the cement to expand and disintegrate
The silica in excess makes the cement stronger but its setting time also increases
The excess amount of alumina weakens the cement
All the above
The plywood
Has good strength along the panel only
Can be spilt in the plane of the panel
Has greater impact resistance to blows than ordinary wood
Cannot be bent more easily than ordinary wood of same thickness
Snowcrete is one of the patent forms of
Distempers
Water proof cement paints
Enamel paints
Cellulose paints
To retard the initial setting time of cement, the compound responsible, is
Tri-calcium silicate
Gypsum
Di-calcium silicate
Tri-calcium aluminate
Portland pozzolana cement possesses
Higher resistance to chemical attack
Lower heat of hydration
Lower shrinkage on drying
All the above
In order of increasing percentage of silica, the correct sequence is
Sandy clay, calcareous clay, pure clay
Calcareous clay, pure clay, sandy clay
Pure clay, sandy clay, calcareous clay
None of these
The most important tool in brick laying for lifting and spreading mortar and for forming joints is
Trowel
Square
Bolster
Scutch
The kiln which may work throughout the year, is
Clamp
Bull's kiln
Hoffman's kiln
None of these
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
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
Plastics are compounds of carbon with element
Hydrogen
Nitrogen
Oxygen
All of these
Good quality stones must
Be durable
Be free from clay
Resist action of acids
All the above
Sea sand used in structures causes
Dampness
Efflorescence
Disintegration
All of these
Plywood is obtained by gluing wooden sheets at
100 to 150 N/cm2
100 to 130°C
Both (A) and (B)
Neither (A) nor (B)
The minimum compressive strength of 1st class bricks should be
75 kg/cm2
90 kg/cm2
100 kg/cm2
120 kg/cm2
In paints, the pigment is responsible for
Durability
Colour
Smoothness
Glassy face
Wrought iron contains carbon about
1.5% to 5.5%
0.5% to 1.75%
0.1% to 0.25%
None to these