Crushing strength of a good building stone should be more than
50 MPa
100 MPa
150 MPa
200 MPa
Correct Answer :
B. 100 MPa
Related Questions
Smith's test of stones is performed to find out
The presence of soluble matter of stone
The compressive strength of the stone
The hardness of the stone
The toughness of the stone
For obtaining vinyl chloride acetate, the method used, is
Addition polymerization
Condensation polymerization
Co-polymerization
None of these
Which of the following represents a metamorphic rock? (i) Slate (ii) Shale (iii) Quartzite The correct answer is
Only (iii)
Both (i) and (iii)
Both (ii) and (iii)
All (i), (ii) and (iii)
The basic purpose of a retarder in concrete is
To increase the initial setting time of cement paste in concrete
To decrease the initial setting time of cement paste in concrete
To render the concrete more water tight
To improve the workability of concrete mix
The most common admixture which is used to accelerate the initial set of concrete is
Gypsum
Calcium chloride
Calcium carbonate
None of the above
Wrought iron contains carbon about
1.5% to 5.5%
0.5% to 1.75%
0.1% to 0.25%
None to these
Cast steel is manufactured by
Cementation process
Crucible process
Bessemer process
Open hearth process
Crushing strength of a first class brick should not be less than
3.5 N/mm²
7.0 N/mm²
10.5 N/mm²
14.0 N/mm²
Gypsum consists of
H₂S and CO₂
CaSO4 and H₂O
Lime and H₂O
CO₂ and calcium
Cast iron is used for
Structural works in beams
Small sized water pipes
Columns and struts
None to these
Pick up the metal refractory from the following:
Molybdenum
Tungsten
Zirconium
All of these
The variety of pig iron used for manufacture of wrought iron, is
Bessemer pig
Grey or foundry pig
White forge pig
Mottled pig
Teak wood is suitable for
Sports articles
Furnitures
Railway sleepers
All the above
Assertion A : Normally turpentine oil is recommended as thinner for indoor painting. Reason R : Turpentine oil is costlier than other thinners. Select your answer according to the coding system given below:
Both A and R is true and R is the correct explanation of A
Both A and R is true but R is not the correct explanation of A
A is true but R is false
A is false but R is true
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
Pozzolana (or surkhi) is used in lime
To impart hydraulicity
To prevent shrinkage
To decrease the cost of construction
To decrease the setting time
Pick up the correct statement from the following:
The heating of a material to redness in contact with air, is known as calcination
The property of lime by which it sets or hardens in damp places having no free circulation of air is called setting
The product that remains after calcination of limestone, is called lime
All the above
Chlorite, a green colour mineral is mainly derived from the decomposition of
Augite
Biotite
Hornblende
All of these
The material generally not used as extender in paints, is
Powdered silica
Gypsum
Talc
Zinc white
Glazing is used to make earthenware
Hard
Soft
Porous
Impervious
First class timber has an average life of
Less than one year
1 to 5 years
5 to 10 years
More than 10 years
Distemper is
A paint consisting of powdered chalk, pigments and water
A water proofing agent
A paint consisting of coloured cement and water
A drying agent
Hydraulic lime is obtained by
Burning of lime stone
Burning of kankar
Adding water to quick lime
Calcination of pure clay
The portion of the brick without a triangular corner equal to half the width and half the length, is called
Closer
Queen closer
King closer
Squint brick
The base material for distemper, is
Chalk
Lime
Lime putty
Cement wash
Dorry's testing machine is used for
Crushing test of stone
Hardness test of stone
Impact test of stone
Water absorption test
Which of the following has more fire resisting characteristics?
Marble
Lime stone
Compact sand stone
Granite
For a good building stone, its specific gravity should the greater than
1.5
1.7
2.2
2.7
Water paint is a
White wash
Colour wash
Whiting
All the above
Formula for quick lime, is
CaCO3
Ca(OH)2
CO3CO2
None to these