For testing compressive strength of cement, the size of cube used is
50 mm
70.6 mm
100 mm
150 mm
Correct Answer :
A. 50 mm
Related Questions
The sequence of refractory materials according to increasing melting points is:
Dolomite, Magnesia, Bauxite, Chromites
Bauxite, Chromites, Dolomite, Magnesia
Magnesia, Bauxite, Dolomite, Chromites
None of these
Seasoning is
A process of removing sap
Creosoting
Painting with sodium silicate
Coating with tar
Knots in timber are
Defects caused by crushing fibres
Splits radiating from the centre
Speckled strains
Signs of branches cut off
The frog of the brick in a brick masonry is generally kept on
Bottom face
Top face
Shorter side
Longer side
Le-Chatelier's device is used for determining the
Setting time of cement
Soundness of cement
Tensile strength of cement
Compressive strength of cement
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
The specific gravity of marble, is
2.50
2.60
2.66
2.72
Porcelain is used as:
Sanitary wares
Electric insulators
Storage vessels
Reactor chambers
Manganese steels
Are non-magnetic
Possess high electrical resistance
Possess low coefficient of expansion
All the above
A ferrous metal is
Cast iron
Wrought iron
Steel
All the above
With increase in moisture content, the bulking of sand
Increases
Decreases
First increases to a certain maximum value and then decreases
First decreases to a certain minimum value and then increases
Polymerization helps to improve the property of
Strength
Rigidity
Elasticity
All of these
Upto a maximum of 72% of iron, is available in
Magnetite
Limonite
Siderite
Iron pyrites
During pudding
Molten metal is kept clear of the fuel
Carbon is converted into carbonic acid gas
Silicon forms a slag
All the above
Whitworth compressed steel is obtained when molten steel is subjected to a pressure of
5 kg/mm2
9 kg/mm2
13 kg/mm2
15 kg/mm2
Seasoning of timber is done for
Increasing moisture content
Decreasing moisture content
Increasing strength of timber
None to these
Duco paints are
Plastic paints
Cellulose paints
Emulsion paints
Oil paints
The process of mixing clay, water and other ingredients to make brick is known as
Kneading
Moulding
Pugging
Drying
Pick up the correct statement from the following:
Blisters in the finished wrought iron, are caused due to the reaction between oxide of iron and carbon
The edges of a finished wrought iron are rough due to red shortage
Pig iron (charcoal) is manufactured from magnetic ore (Fe3O4)
All the above
Plywood is made from
Common timber
Bamboo fibre
Teak wood only
Asbestos sheets
The minimum compressive strength of 2nd class bricks should be
75 kg/cm2
90 kg/cm2
100 kg/cm2
120 kg/cm2
The most valuable timber may be obtained from
Chir
Shishum
Sal
Teak
Asbestos cement
Is brittle
Warps due to changes in humidity
Strength is lowered when saturated by water
All of the above
Jhumb bricks are
Under burnt
Over burnt
Kutcha
None of these
The timber having maximum resistance against white ants, is obtained from
Chir
Shishum
Sal
Teak
Pig iron is manufactured from the ores by
Dressing
Calcination and roasting
Smelting
All the above
Quick lime is (i) Slow in setting (ii) Rapid in slacking (iii) Good in strength The correct answer is
Only (i)
Only (ii)
Both (i) and (ii)
Both (ii) and (iii)
The rocks formed by gradual deposition, are called
Sedimentary rocks
Igneous rocks
Metamorphic rocks
None of these
Lime putty
Is made from hydraulic lime
Is made by adding lime to water
Can be used only upto three days
All of above
Turpentine oil is used in paints as
Thinner
Vehicle
Base
Drier