Pick up the correct statement from the following:
Slaked lime contains calcium hydroxide
Quick lime contains calcium oxide
Slaked lime may be obtained from quick lime
All the above
Correct Answer :
D. All the above
Related Questions
The property by virtue of which lime sets under water, is known as
Slacking
Setting
Hydraulicity
Calcining
Which of the following is a rock?
Quartz
Mica
Gypsum
None of the above
Calcination of iron ores is done
To remove moisture
To remove carbonic acid
By roasting in heaps
All the above
Le-Chatelier's device is used for determining the
Setting time of cement
Soundness of cement
Tensile strength of cement
Compressive strength of cement
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
For construction of structures under water, the type of lime used, is
Hydraulic lime
Fat lime
Quick lime
Pure lime
Pick up the incorrect statement from the following:
Plastics are chemical resistant
Plastics are durable
Plastics are ductile
Plastics are excellent electric insulators
A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than
10 %
15 %
20 %
25 %
In order of increasing percentage of silica, the correct sequence is
Sandy clay, calcareous clay, pure clay
Calcareous clay, pure clay, sandy clay
Pure clay, sandy clay, calcareous clay
None of these
Sandstone is a (i) Sedimentary rock (ii) Aqueous rock (iii) Siliceous rock The correct answer is
Only (i)
Both (i) and (ii)
Both (i) and (iii)
All (i), (ii) and (iii)
Slacking of lime is affected by
Keeping it exposed to air
Immersing the lime in water
Crushing the lime lumps
None of these
Based on flow quality, the sequence of pipes is
A.C. pipes, G.I. pipes, C.I. pipes, PVC pipes
C.I. pipes, G.I. pipes, A.C. pipes, PVC pipes
C.I. pipes, G.I. pipes, PVC pipes, A.C. pipes
None of these
Slump test for concrete is carried out, to determine
Strength
Durability
Workability
Water content
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 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
Bullet proof glass is made of thick glass sheet sandwiched by a layer of
Steel
Stainless steel
High test plastic
Chromium plate
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
The vehicle used in case of enamel paints is usually
Linseed oil
Water
Varnish
None of the above
The presence of original rounded surface on the manufactured piece of timber, is called
Wane
Torn grain
Diagonal grain
Chipmark
Stones used for the construction of retaining walls must be
Soft
Hard
Light
Heavy
The compound of Portland cement which contributes to the strength after two to three years is
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra-calcium alumino ferrite
Pick up the correct statement from the following:
Corrugated sheet iron is made by passing plain sheets between grooved rollers
Strength and stiffness of corrugated sheets are considerably increased
Corrugated sheets are generally used on slanting roofs
All the above
Cast iron contains carbon approximately
1.5% to 5.5%
0.05% to 1.75%
0.250 %
None to these
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
Pick up the correct statement from the following:
The low voltage porcelain is prepared by wet process
The high voltage porcelain is prepared by dry process
The low voltage porcelain is prepared by dry process
None of the above
Veneering means
Carving out designs on timber planks
Chemically treating timber planks
Thick layer of superior wood glued to inferior wood
Thin layer of superior wood glued to inferior wood
Pick up the correct statement regarding low heat cement from the following:
It possesses less compressive strength
Its initial setting time is about one hour
Its final setting time is about 10 hours
All the above
Cast iron is used for
Structural works in beams
Small sized water pipes
Columns and struts
None to these
Minimum required water cement ratio for a workable concrete, is
0.30
0.40
0.50
0.60
Specific gravity for most of the building stones lies between
1.5 to 2.0
2.0 to 2.5
2.5 to 3.0
3.0 to 3.5