Pick up the correct statement from the following:
Plastics have generally low melting point
The coefficient of thermal expansion of plastics is about three times than that of steel
The acoustical boards prepared by impregnating fibre-glass with phenolic resins has absorption coefficient of about 0.67
All the above
Correct Answer :
D. All the above
Related Questions
Study the following statements. (i) Hydraulic lime is suitable for white washing, (ii) Fat lime is suitable for whitewashing, (iii) Hydraulic lime is suitable for making mortar, (iv) Fat lime is suitable for making mortar. The correct answer is
(i) and (iv)
(ii) and (iii)
(i) and (ii)
(iii) and (iv)
Pick up the synthetic resin from the following:
Urea resin
Phenolic resin
Resorcinol resin
All of these
The type of bond provided in brick masonry for carrying heavy loads is
Single Flemish bond
Double Flemish bond
English bond
Zigzag bond
Jhumb bricks are
Under burnt
Over burnt
Kutcha
None of these
Plastics are compounds of carbon with element
Hydrogen
Nitrogen
Oxygen
All of these
According to IS specifications, the compressive strength of ordinary Portland cement after three days should not be less than
7 MPa
11.5 MPa
16 MPa
21 MPa
Bitumen is generally obtained from
Organic material
Synthetic material
Petroleum product
Coal
Glazing of clay products, is done
To improve their appearance
To protect them from atmospheric effect
To protect them from corrosive action
All the above
The stone suitable for rubble masonry should be.
Hard
Tough
Heavy
Light
Wrought iron is manufactured from pig iron by
Refining
Pudding
Shingling
All the above
A queen closer is a
Brick laid with its length parallel to the face or direction of wall
Brick laid with its breadth parallel to the face or direction of wall
Brick having the same length and depth as the other bricks but half the breadth
Brick with half the width at one end and full width at the other
Laterite is a/an
Volcanic rock
Argillaceous rock
Calcareous rock
Siliceous rock
Teak wood is suitable for
Sports articles
Furnitures
Railway sleepers
All the above
Pick up the polymineralic rock from the following:
Quartz sand
Pure gypsum
Magnesite
Granite
To give a brilliant finish, the type of varnish used, is
Water varnish
Spirit varnish
Turpentine varnish
Oil varnish
Which of the following is a mineral?
Basalt
Granite
Quartz
Syenite
Rocks formed due to alteration of original structure due to heat and excessive pressure are called
Sedimentary rocks
Igneous rocks
Metamorphic rocks
None of these
The rocks formed from molten magma, are called
Sedimentary rocks
Igneous rocks
Metamorphic rocks
None of these
Pick up the correct statement from the following:
For thin structures subjected to wetting and drying, the water cement ratio should be 0.45
For mass concrete structures subjected to wetting and drying, the water ratio should be 0.55
For thin structures which remain continuously under water, the watercement ratio by weight should be 0.55
All the above
The usual percentages of clay and metal in cermet are:
50%, 50%
60%, 40%
70%, 30%
80%, 20%
Which of the following sedimentary rocks changes into quartzite by metamorphic action?
Sand stone
Lime stone
Shale
Gypsum
Cast iron contains carbon approximately
1.5% to 5.5%
0.05% to 1.75%
0.250 %
None to these
Good quality stones must
Be durable
Be free from clay
Resist action of acids
All the above
In a mortar, the binding material is
Cement
Sand
Surkhi
Cinder
The main constituent of fly-ash, is
Aluminium oxide
Silica
Ferrous oxide
All of these
Minimum of 40% of iron, is available in
Magnetite
Red haematite
Limonite
Black band
Linseed oil is used in paints as
Thinner
Vehicle
Base
Drier
Which one of the following is an air binding material?
Gypsum
Acid-resistant cement
Quick lime
All of these
Pick up the correct statement from the following:
Plastics have generally low melting point
The coefficient of thermal expansion of plastics is about three times than that of steel
The acoustical boards prepared by impregnating fibre-glass with phenolic resins has absorption coefficient of about 0.67
All the above
The variety of pig iron used for the manufacture of steel by Bessemer process, is
Bessemer pig
Grey pig
White forge pig
Mottled pig