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
Correct Answer :
D. None of these
Related Questions
The main ingredient of a good quality brick earth, is
Magnesia
Lime
Silica
Alumina
As per IS specifications, the maximum final setting time for ordinary Portland cement should be
30 minutes
1 hour
6 hours
10 hours
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
Which of the following timbers is suitable for making sports goods?
Mulberry
Mahogany
Sal
Deodar
Seasoning of timber is done for
Increasing moisture content
Decreasing moisture content
Increasing strength of timber
None to these
French polish is
Oil paint
Distemper
Spirit varnish
None to these
Mild steel is used for
Structural works in beams, joints and girders
Small sized water pipes
Columns and struts
None of these
Geologically, marble is known as
Sedimentary rock
Igneous rock
Metamorphic rock
Stratified rock
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)
The rocks formed from molten magma, are called
Sedimentary rocks
Igneous rocks
Metamorphic rocks
None of these
Pick up the correct statement regarding low heat cement from the following:
It possesses less compressive strength
Its initial setting time is about one hour
Its final setting time is about 10 hours
All the above
Lime putty
Is made from hydraulic lime
Is made by adding lime to water
Can be used only upto three days
All of above
Bulking of sand is caused due to
Surface moisture
Air voids
Viscosity
Clay contents
Three basic raw materials which are needed in large quantities for production of steel are
Iron ore, coal and sulphur
Iron ore, carbon and sulphur
Iron ore, coal and lime stone
Iron ore, carbon and lime stone
Manganese steels
Are non-magnetic
Possess high electrical resistance
Possess low coefficient of expansion
All the above
Lime mortar is generally made with
Quick lime
Fat lime
Hydraulic lime
Plain lime
Acrylic is the name of
Cellulose resin
Alkyd resin
Methyl methacrylate
Cumarone-indene
Le-Chatelier's device is used for determining the
Setting time of cement
Soundness of cement
Tensile strength of cement
Compressive strength of cement
Fibre glass
Retains heat-longer
Has a higher strength to weight ratio
Is shock proof and fire retardant
All the above
Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth?
Lime stone and alumina
Silica and alkalies
Alumina and iron
Alkalies and magnesium
Putty is
Made with finely powdered chalk and linseed oil
Used for fixing glass panes
Softened by a solution of pearl ash and quick-lime soaked in water
All the above
The slag which floats on the surface of the molten iron generally contains
Lime (CaO) 45%
Silica (SiO2) 35%
Alumina (Al2O3) 12% and MgO, CaSO4, KMnO2 and FeO 8%
All the above
According to ISI, bitumen is classified into
2 grades
4 grades
8 grades
10 grades
Minimum required water cement ratio for a workable concrete, is
0.30
0.40
0.50
0.60
The weight of a good quality brick when immersed in water for a period of 16 hours should not exceed the weight of dry brick
20 %
15 %
10 %
None of these
Pick up the correct statement from the following:
The plastic bottles are made by the process of blowing
The application of thermo-setting resins on sheets of paper, is called laminating process
The plastic articles made by placing raw material in the desired moulds, is known as moulding process
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
The plastics made from cellulose resin
Are as clear as glass
Are tough and strong
Possess excellent electrical properties
All the above
Turpentine oil is used in paints as
Thinner
Vehicle
Base
Drier
The main constituent which imparts hydraulicity to hydraulic lime is
Calcium oxide
Silica
Clay
Water