Higher pitch of the roof
A. (i) and (iii)
B. (i) and (iv)
C. (ii) and (iii)
D. (ii) and (iv)
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The method of addition polymerization is used for obtaining:
A. Polystyrene
B. Polypropylene
C. Polyvinylchloride
D. All of these
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Index number expressing the relative sizes of both coarse and fine aggregates, is called
A. Proportioning of aggregates
B. Fineness modulus
C. Grading of aggregates
D. None of these
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During smelting process, the combination of fuel in the furnace
A. Forms carbon dioxide
B. Carbon dioxide with carbon forms carbon mono-oxide
C. Carbon mono-oxide reacts with Fe2 O3 to form iron and liberates CO2
D. All the above
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Bituminous fells are used for
A. Covering A.C. sheets
B. Covering sloping roofs
C. D.P.C.
D. None to these
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The slag which floats on the surface of the molten iron generally contains
A. Lime (CaO) 45%
B. Silica (SiO2 ) 35%
C. Alumina (Al2 O3 ) 12% and MgO, CaSO4 , KMnO2 and FeO 8%
D. All the above
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Mastic asphalt is generally used for
A. Damp proof course
B. Water proof layer
C. Partition walls
D. Both (A) and (B)
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Vanadium steel is generally used for
A. Railway switches and crossing
B. Bearing balls
C. Magnets
D. Axles and springs
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Plastic bitumen is generally used for
A. Road pavements
B. Expansion joints
C. Crack fillings
D. None to these
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Lime concrete is generally used for
A. Wall foundations
B. Flooring at ground level
C. Both (A) and (B)
D. Neither (A) nor (B)
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The commonly used color pigment in paints, is
A. Ambers
B. Carbon black
C. Iron oxide
D. All the above
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The rocks having alumina or clay as their major constituents are known as
A. Siliceous rocks
B. Argillaceous rocks
C. Calcareous rocks
D. Sedimentary rocks
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The harmonious mixing of the clay ingredients, is known as
A. Weathering
B. Blending
C. Tempering
D. None of these
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The basic purpose of a retarder in concrete is
A. To increase the initial setting time of cement paste in concrete
B. To decrease the initial setting time of cement paste in concrete
C. To render the concrete more water tight
D. To improve the workability of concrete mix
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Rocks formed due to alteration of original structure due to heat and excessive pressure are called
A. Sedimentary rocks
B. Igneous rocks
C. Metamorphic rocks
D. None of these
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Which of the following is the purest form of iron?
A. Cast iron
B. Wrought iron
C. Mild steel
D. High carbon steel
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The most common admixture which is used to accelerate the initial set of concrete is
A. Gypsum
B. Calcium chloride
C. Calcium carbonate
D. None of the above
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Proper amount of entrained air in concrete results in
A. (i) and (ii)
B. (i) and (iv)
C. (ii) and (iii)
D. (iii) and (iv)
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Fibre glass
A. Retains heat-longer
B. Has a higher strength to weight ratio
C. Is shock proof and fire retardant
D. All the above
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The base material for distemper, is
A. Chalk
B. Lime
C. Lime putty
D. Cement wash
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