Name the type of cement from the following for canal linings:
Sulphate resisting cement
Rapid hardening cement
Quick setting cement
Pozzolana cement
Correct Answer :
A. Sulphate resisting cement
Related Questions
The portion of a brick cut to form angles other than right angles in plan, is known as
Queen closer
King closer
Closer
Squint brick
In the cement the compound quickest to react with water, is
Tri-calcium aluminate
Tetra-calcium alumino-ferrite
Tri-calcium silicate
Di-calcium silicate
Dorry's testing machine is used for
Crushing test of stone
Hardness test of stone
Impact test of stone
Water absorption test
A bull nose brick is not used for
Rounding off sharp corners
Pillars
Decoration purpose
Arches
Spirit varnish generally consists of
Oil, wax and resin
Alcohol, wax and turpentine
Pigment and synthetic resin
Spirit and shellac
Brass is an alloy of
Copper and zinc
Zinc and lead
Tin and silver
Zinc and nickel
Compared to mild steel, cast iron has (i) High compressive strength (ii) High tensile strength (iii) Low compressive strength (iv) Low tensile strength The correct answer is
(i) and (ii)
(ii) and (iii)
(iii) and (iv)
(i) and (iv)
Which of the following timbers is suitable for making sports goods?
Mulberry
Mahogany
Sal
Deodar
Cast steel is manufactured by
Cementation process
Crucible process
Bessemer process
Open hearth process
The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively:
15, 75, 10
75, 10, 15
10, 15, 75
10, 75, 15
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 specific gravity of marble, is
2.50
2.60
2.66
2.72
Durability of building stone is affected by its
Chemical composition
Texture
Resistance to atmosphere
All the above
Porcelain is used as:
Sanitary wares
Electric insulators
Storage vessels
Reactor chambers
Pick up the correct statement from the following:
Alexander Parkes, a Scottish chemist prepared a hard material by mixing camphor and alcohol with nitro cellulose and called it, as Parkesite
Dr. L. Bakeland, a Belgian scientist prepared a product known as Bakelite
Pollark, an Austrian scientist prepared a substance from urea and formaldehyde and called it Plastic
All the above
Plaster of Paris is obtained by calcining
Bauxite
Gypsum
Lime stone
None of these
The PVC doors and windows are preferred as they are
Rust proof
Rot proof
Water proof
All of these
Good quality stones must
Be durable
Be free from clay
Resist action of acids
All the above
Which one of the following is acid resistant asbestos?
Actinolite asbestos
Amosite asbestos
Anthophylite asbestos
All the above
Percentage content of silica in window glass, is
40 to 45
50 to 55
60 to 65
70 to 75
Crushing strength of a good building stone should be more than
50 MPa
100 MPa
150 MPa
200 MPa
The rocks which are formed due to cooling of magma at a considerable depth from earth's surface are called
Plutonic rocks
Hypabyssal rocks
Volcanic rocks
Igneous rocks
Mild steel is used for
Structural works in beams, joints and girders
Small sized water pipes
Columns and struts
None of these
For a good building stone, its specific gravity should the greater than
1.5
1.7
2.2
2.7
During pudding
Molten metal is kept clear of the fuel
Carbon is converted into carbonic acid gas
Silicon forms a slag
All the above
In a mortar, the binding material is
Cement
Sand
Surkhi
Cinder
A stone is rejected if it absorbs water more than
5 %
10 %
15 %
20 %
Slate is formed by metamorphic action on
Shale
Lime stone
Sand stone
Granite
Cement is said to be of good quality if
Its colour is not greenish grey
One feels cool by thrusting one's hand in the cement bag
A handful of cement thrown into a bucket of water does not float
None of these
Knots in timber are
Defects caused by crushing fibres
Splits radiating from the centre
Speckled strains
Signs of branches cut off