Bitumen is generally obtained from
Organic material
Synthetic material
Petroleum product
Coal
Correct Answer :
C. Petroleum product
Related Questions
If P is the percentage of water required for normal consistency, water to be added for determination of initial setting time, is
0.70 P
0.75 P
0.80 P
0.85 P
Portland cement manufactured from pure white chalk and clay but free from iron-oxide, is known as
Quick setting cement
Rapid hardening cement
White cement
Low heat Portland cement
The steel used for rails under heavy traffic and on sharp curves, is
Nickel steel
Chrome steel
Manganese steel
Vanadium steel
Pick up the correct statement from the following:
Bull's trench kiln a trench excavated in ground
Hoffman's kiln is constructed over ground
Tunnel Kiln is constructed as a tunnel
All the above
Chlorite, a green colour mineral is mainly derived from the decomposition of
Augite
Biotite
Hornblende
All of these
The silica is used for preparing
Silica bricks
Coke oven
Lining for glass furnaces
All of these
Percentage of silica in a good brick earth lies between
5 to 10 %
20 to 30 %
50 to 60 %
70 to 80 %
The slump recommended for mass concrete is about
25 mm to 50 mm
50 mm to 100 mm
100 mm to 125 mm
125 mm to 150 mm
Sand stone is
Sedimentary rock
Metamorphic rock
Igneous rock
Volcanic rock
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:
Air bubbles in casting produce a dull sound by tapping their surfaces lightly with a hammer
Cupola furnace is used for the manufacture of cast iron
Red short iron is of no value for welding purpose
All the above
Wrought iron is manufactured from pig iron by
Refining
Pudding
Shingling
All the above
For the manufacture of stainless steel, steel is mixed with
Chromium
Nickel
Tungsten
None of these
Depending on the chemical composition and mechanical properties, iron may be classified as
Cast iron
Wrought iron
Steel
All the above
According to IS 399-1963, the weight of the timber is specified at
8% moisture content
10% moisture content
12% moisture content
14% moisture content
The constituent of cement which is responsible for all the undesirable properties of cement is
Di-calcium silicate
Tri-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
Glazing is used to make earthenware
Hard
Soft
Porous
Impervious
Plastic bitumen is generally used for
Road pavements
Expansion joints
Crack fillings
None to these
Age of a tree may be ascertained by
Radius of its stem
Circumference of its stem
Number of branches
Number of annual rings
Minimum thickness of wall where single Flemish bond can be used is
Half brick thick
One brick thick
One and a half bricks thick
Two bricks thick
Proper amount of entrained air in concrete results in (i) Better workability (ii) Better resistance to freezing and thawing (iii) Lesser workability (iv) Less resistance to freezing and thawing The correct answer is
(i) and (ii)
(i) and (iv)
(ii) and (iii)
(iii) and (iv)
Pick up the correct statement from the following:
Acid test is done to find out the weathering quality of stones
Attrition test is done to find out the rate of wear of stones which are used in road construction
Crushing test is done to find out the compressive strength of the stone
All the above
Duco is one of the patent forms of
Emulsion paints
Plastic paints
Bituminous paints
Cellulose paints
The filler used in plastic bitumen, is
Shale powder
Talc powder
Asbestos powder
Plastic powder
Pick up the correct statement from the following:
In basic Bessemer process, the steel heats the converter
In open-hearth process, the furnace heats the steel
In Siemens process, the impurities of pig iron are oxidised by the oxygen of the ore
All the above
A stone is rejected if it absorbs water more than
5 %
10 %
15 %
20 %
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
Fibre glass
Retains heat-longer
Has a higher strength to weight ratio
Is shock proof and fire retardant
All the above
Snowcrete is one of the patent forms of
Distempers
Water proof cement paints
Enamel paints
Cellulose paints
For melting one tonne of cast iron
700 m3 air is required
20 kg limestone is required
One quintal coke is required
All the above