For high grade instruments the steel preferred to, is
Cast steel
Bessemer steel
Mild steel
Whitworth compressed steel
Correct Answer :
A. Cast steel
Related Questions
Bitumen felt is used for
Water proofing
Damp proofing
Both (A) and (B)
Neither (A) nor (B)
Stainless steel contains
18% of chromium and 8% nickel
8% of chromium and 18% of nickel
12% of chromium and 36% of nickel
36% of chromium and 12% of nickel
The presence of original rounded surface on the manufactured piece of timber, is called
Wane
Torn grain
Diagonal grain
Chipmark
Plywood has the advantage of
Greater tensile strength in longer direction
Greater tensile strength in shorter direction
Same tensile strength in all directions
None of the above
A well seasoned timber may contain moisture up to
4 to 6 %
6 to 8 %
8 to 10 %
10 to 12 %
First class timber has an average life of
Less than one year
1 to 5 years
5 to 10 years
More than 10 years
Bitumen emulsion is
A liquid containing bitumen in suspension
A paint
Used as anti-corrosive paint
All the above
Quick lime (or caustic lime)
Is obtained by the calcination of pure lime stone
Has great affinity to moisture
Is amorphous
All the above
Refractory bricks are
Neutral refractory bricks
Acid refractory bricks
Basic refractory bricks
All the above
Mastic asphalt is generally used for
Damp proof course
Water proof layer
Partition walls
Both (A) and (B)
Ultimate strength to cement is provided by
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
Minimum required water cement ratio for a workable concrete, is
0.30
0.40
0.50
0.60
Lime putty
Is made from hydraulic lime
Is made by adding lime to water
Can be used only upto three days
All of above
The base material for distemper, is
Chalk
Lime
Lime putty
Cement wash
The steel used in R.C.C. work is
Stainless steel
Mild steel
High carbon steel
Wrought iron
Chlorite, a green colour mineral is mainly derived from the decomposition of
Augite
Biotite
Hornblende
All of these
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
In brick masonry the bond produced by laying alternate headers and stretchers in each course is known as
English bond
Double Flemish bond
Zigzag bond
Single Flemish bond
Which of the following stone is best suited for construction of piers and abutments of a railway bridge?
Granite
Sand stone
Lime stone
Quartzite
The most valuable timber may be obtained from
Chir
Shishum
Sal
Teak
The most important constituent of varnish, is
Drier
Solvent
Resin
All the above
The most durable varnish is
Water varnish
Spirit varnish
Turpentine varnish
Oil varnish
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
Dorry's testing machine is used for
Crushing test of stone
Hardness test of stone
Impact test of stone
Water absorption test
Pick up the correct statement from the following:
The percentage of absorption for firebricks varies from 5 to 10
The percentage of silica in silica bricks is to the extent of about 95 to 97 percent
Roughly 1 to 2 percent of lime in silica bricks is added to act as binding material
All the above
Plastic asphalt is
Used as a water proofing layer over roof
A mixture of cement and asphalt
A natural asphalt
A refinery product
Good quality cement contains higher percentage of
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
Due to attack of dry rot, the timber
Cracks
Shrinks
Reduces to powder
None of these
Pick up the correct statement from the following:
Lime is available in Free State
Lime is available by dissolving calcium carbonate in water
Lime is available by calcining calcium carbonate at 900°C
Lime is nothing but calcium chloride
Slate is formed by metamorphic action on
Shale
Lime stone
Sand stone
Granite