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
Correct Answer :
B. Grey or foundry pig
Related Questions
Bitumen emulsion is
A liquid containing bitumen in suspension
A paint
Used as anti-corrosive paint
All the above
In a rock calcium carbonate predominates. State whether it is:
Siliceous rock
Argillaceous rock
Calcareous rock
None of these
Dextrin is
Animal glue
Starch glue
Albumin glue
Rubber based adhesive
Pick up the correct statement from the following:
The distinct plane of division along which a stone can easily be split, is called natural bed of stone
The natural bed of sedimentary rocks is along the planes of stratification
The natural bed of igneous rocks is not defined
All the above
Quick lime is
Calcium carbonate
Calcium oxide
Calcium hydroxide
None of the above
Lime stones are generally known as
Aqueous rocks
Sedimentary rocks
Stratified rocks
All the above
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:
The percentage of absorption for firebricks varies from 5 to 10
The percentage of silica in silica bricks is to the extent of about 95 to 97 percent
Roughly 1 to 2 percent of lime in silica bricks is added to act as binding material
All the above
Cement paints usually
Contain hydrated lime
Contain 5% to 10% colour pigments
Contain 5% sodium chloride
All the above
Proper amount of entrained air in concrete results in (i) Better workability (ii) Better resistance to freezing and thawing (iii) Lesser workability (iv) Less resistance to freezing and thawing The correct answer is
(i) and (ii)
(i) and (iv)
(ii) and (iii)
(iii) and (iv)
The melting point of silica is:
1570°C
1630°C
1730°C
1850°C
Manganese steels
Are non-magnetic
Possess high electrical resistance
Possess low coefficient of expansion
All the above
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
Pick up the synthetic resin from the following:
Urea resin
Phenolic resin
Resorcinol resin
All of these
A bull nose brick is not used for
Rounding off sharp corners
Pillars
Decoration purpose
Arches
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
For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of
1 : 2
1 : 3
1 : 4
1 : 6
The trunk of tree left after cutting all the branches is known as
Log
Batten
Plank
Baulk
Crushing strength of a good building stone should be more than
50 MPa
100 MPa
150 MPa
200 MPa
Galvanising means covering iron with a thin coat of
Tin
Zinc
Glaze
Coal tar
The main constituent of cement which is responsible for initial setting of cement is
Di-calcium silicate
Tri-calcium silicate
Tri-calcium aluminate
All of the above
Percentage of carbon content in mild steel is
Less than 0.25
Between 0.25 and 0.7
Between 0.7 and 1.5
Greater than 1.5
The plastics made from cellulose resin
Are as clear as glass
Are tough and strong
Possess excellent electrical properties
All the above
The stones obtained by blasting are used as
Ballast in railways
Aggregates for concrete
Road metal
All the above
Slump test for concrete is carried out, to determine
Strength
Durability
Workability
Water content
Durability of building stone is affected by its
Chemical composition
Texture
Resistance to atmosphere
All the above
Bessemer process is used for the manufacture of
Pig iron
Cast iron
Wrought iron
Steel
Inner part of a timber log surrounding the pitch, is called
Sapwood
Cambium layer
Heart wood
None to these
Refractory bricks resist
High temperature
Chemical action
Dampness
All the above
If the iron ore contains clay as an impurity, the flux added during calcination, is
Clay
Lime stone
Argillaceous iron ore
All the above