Stainless steel resists corrosion due to
Carbon
Sulphur
Vanadium
Chromium
Correct Answer :
D. Chromium
Related Questions
A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than
10 %
15 %
20 %
25 %
The type of bond provided in brick masonry for carrying heavy loads is
Single Flemish bond
Double Flemish bond
English bond
Zigzag bond
Plastics are compounds of carbon with element
Hydrogen
Nitrogen
Oxygen
All of these
Steel contains carbon approximately
1.50% to 5.6%
0.05% to 1.75%
0.25 %
None to these
Asbestos is
Corrugated sheet used for roofing
An incombustible fire proof material
An organic substance
All the above
Which of the following timbers is suitable for making sports goods?
Mulberry
Mahogany
Sal
Deodar
Good quality cement contains higher percentage of
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
Gypsum consists of
H₂S and CO₂
CaSO4 and H₂O
Lime and H₂O
CO₂ and calcium
Vanadium steel is generally used for
Railway switches and crossing
Bearing balls
Magnets
Axles and springs
Expansion Joints in masonry walls are provided in wall lengths usater than
10 m
20 m
30 m
40 m
Which of the following should be used for hearting of thicker walls?
Headers
Stretchers
Brick bats
Queen closer
The filler used in plastic bitumen, is
Shale powder
Talc powder
Asbestos powder
Plastic powder
The commonly used base for iron and steel work, is
Red lead
Zinc white
White lead
Titanium white
Seasoning of timber is done
To make it water proof
To paint its surface
To increase its temperature
To remove water
Age of a tree may be ascertained by
Radius of its stem
Circumference of its stem
Number of branches
Number of annual rings
The normal curing period for lime mortar, is:
1 day
3 days
7 days
10 days
Generally wooden moulds are made from
Ply wood
Shishum wood
Deodar wood
Teak wood
Ultimate strength to cement is provided by
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
The softest rock is
Marble
Diamond
Talc
Quartz
Which of the following stone is best suited for construction of piers and abutments of a railway bridge?
Granite
Sand stone
Lime stone
Quartzite
Good quality stones must
Be durable
Be free from clay
Resist action of acids
All the above
Seasoning of timber is done for
Increasing moisture content
Decreasing moisture content
Increasing strength of timber
None to these
The variety of pig iron used for manufacture of wrought iron, is
Bessemer pig
Grey or foundry pig
White forge pig
Mottled pig
The initial setting time of lime-pozzolana, is
30 minutes
60 minutes
90 minutes
120 minutes
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)
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
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
For one cubic metre of brick masonry, number of bricks required, is
400
425
450
500
The size of mould for bricks, is generally kept
A little large to specified size
A little small to specified size
Equal to specified size
10% larger than specified size
Pick up the correct statement from the following:
Steel produced by open hearth process is milder than that obtained by the Bessemer process
Engineers prefer open hearth steel for structural purpose as it is more homogenous
Basic Bessemer process is suitable for converting poor ore containing a large proportion of sulphur and phosphorus into steel
All the above