Plastics are compounds of carbon with element
Hydrogen
Nitrogen
Oxygen
All of these
Correct Answer :
D. All of these
Related Questions
Steel contains carbon approximately
1.50% to 5.6%
0.05% to 1.75%
0.25 %
None to these
Pick up the incorrect statement from the following:
Plastics are chemical resistant
Plastics are durable
Plastics are ductile
Plastics are excellent electric insulators
The fire clay contains pure
Lime
Oxide of iron
Hydrated aluminium silicate
Magnesium
The most commonly used retarder in cement is
Gypsum
Calcium chloride
Calcium carbonate
None of the above
As per IS specifications, the maximum final setting time for ordinary Portland cement should be
30 minutes
1 hour
6 hours
10 hours
Cross cut saw is used for
Cutting soft stones
Cutting hard stones
Cutting large blocks of stones
Dressing stones
The tendency of a stone is, to split along:
Texture
Fracture
Cleavage
Structure
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)
Pick up the correct statement from the following:
The plywoods do not split or crack due to changes in atmosphere
The commercial plywoods are available upto 150 cm wide and upto 300 cm long
The plywoods possess uniform tensile strength in all directions
All the above
For high grade instruments the steel preferred to, is
Cast steel
Bessemer steel
Mild steel
Whitworth compressed steel
The wedging is adopted for quarrying costly stratified rock such as
Laterite
Marble
Limestone
All the above
Seasoning is
A process of removing sap
Creosoting
Painting with sodium silicate
Coating with tar
The most valuable timber may be obtained from
Chir
Shishum
Sal
Teak
Pick up the correct statement from the following:
The theory of formation of concrete is based on the phenomena of formation of voids
The bulking of sand is taken into account while volumetric proportioning of the aggregates
The dry sand and the sand completely flooded with water, have practically the same volume
All the above
Granite is not suitable for ordinary building purpose because
It cannot be polished
It is not a fire proof material
It is costly
It has less crushing strength
The lime which contains mainly calcium oxide and slacks with water, is
Fat lime
Quick lime
Hydraulic lime
Poor lime
If the ore impurities is
Clay, lime stone is used as flux
Lime stone, clay is used as flux
Quartz, lime stone and argillaceous iron ores are used as flux
All the above
Rapid hardening cement attains early strength due to
Larger proportion of lime grounded finer than normal cement
Lesser proportion of lime grounded coarser than normal cement
Lesser proportion of lime grounded finer than normal cement
Excess percentage of gypsum
Sapwood consists of
Innermost annular rings around the pith
Portion of timber between heartwood and cambium layer
Thin layers below the bark
Thin fibre which extends from the pith outwards and holds the annular rings together
The main constituent of cement which is responsible for initial setting of cement is
Di-calcium silicate
Tri-calcium silicate
Tri-calcium aluminate
All of the above
The type of steel used for precision levelling staff, is
Titanium steel
Carbon steel
Invar
Stainless steel
Inner part of a timber log surrounding the pitch, is called
Sapwood
Cambium layer
Heart wood
None to 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
Basalt is
Sedimentary rock
Metamorphic rock
Extrusive igneous rock
Intrusive igneous rock
A good quality stone absorbs water less than
5 %
10 %
15 %
25 %
Bulking of sand is caused due to
Surface moisture
Air voids
Viscosity
Clay contents
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)
A pug mill is used for
Softening brick earth
Moulding brick earth
Tempering brick earth
Providing brick earth
The cracks which extend from bark towards the sap wood in the cross section of a tree, are called
Radial shakes
Star shakes
Heart shakes
Cup shakes
Pick up the correct statement from the following:
Roasting is not necessary if iron ore is an oxide
Impurities float on the molten iron as slag
The slag contains lime about 45%
All the above