The steel used for rails under heavy traffic and on sharp curves, is
Nickel steel
Chrome steel
Manganese steel
Vanadium steel
Correct Answer :
C. Manganese steel
Related Questions
According to ISI, bitumen is classified into
2 grades
4 grades
8 grades
10 grades
Expansion Joints in masonry walls are provided in wall lengths usater than
10 m
20 m
30 m
40 m
The type of steel used for precision levelling staff, is
Titanium steel
Carbon steel
Invar
Stainless steel
Softer variety of steel may be obtained by
Cementation process
Crucible process
Bessemer process
Open hearth process
Crushing strength of a good building stone should be more than
50 MPa
100 MPa
150 MPa
200 MPa
German silver is an alloy of
Zinc, lead and nickel
Silver, gold and lead
Copper, nickel and zinc
Copper, brass and zinc
Due to attack of dry rot, the timber
Cracks
Shrinks
Reduces to powder
None of these
The normal consistency of ordinary Portland cement is about
10 %
20 %
30 %
40 %
The weight of 1 m3 of brick earth, is about
1200 kg
1500 kg
1800 kg
2000 kg
Putty is
Made with finely powdered chalk and linseed oil
Used for fixing glass panes
Softened by a solution of pearl ash and quick-lime soaked in water
All the above
Minimum required water cement ratio for a workable concrete, is
0.30
0.40
0.50
0.60
As per IS specifications, the maximum final setting time for ordinary Portland cement should be
30 minutes
1 hour
6 hours
10 hours
Ultimate strength to cement is provided by
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
The method of addition polymerization is used for obtaining:
Polystyrene
Polypropylene
Polyvinylchloride
All of these
Strength of cement concrete primarily depends upon
Quality of water
Quantity of aggregate
Quantity of cement
Water-cement ratio
Sewer pipes are made of
Earthen ware
Stone ware
Refractory clay
All the above
Initial setting of cement is caused due to
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
Stucco paints are suitable for
Stone masonry
Brick walls
Both (A) and (B)
Neither (A) nor (B)
The ultimate tensile strength of structural mild steel is about
160 N/mm²
260 N/mm²
420 N/mm²
520 N/mm²
The colour of statuary marble used for sculptor's work, is
Red
Blue
White
Green
Excess of alumina in brick earth makes the brick
Impermeable
Brittle and weak
To lose cohesion
To crack and warp on drying
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
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
The steel used in R.C.C. work is
Stainless steel
Mild steel
High carbon steel
Wrought iron
Acrylic sheets
Possess 10 to 17 times greater breakage resistance than that of glass of equivalent thickness
Are generally unaffected by most household detergents
Possess the light transmission rate of 93%
All the above
Invar contains
12% of nickel
24% of nickel
30% to nickel
36% of nickel
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
The percentage of alumina and silica in good fire clay vary respectively is
25, 75
30, 70
35, 65
All of these
Which one of the following polymers is obtained from condensation polymerization?
Phenol formaldehyde
Carbamide
Melamine-formaldehyde
All of these
Quick lime is
Calcium carbonate
Calcium oxide
Calcium hydroxide
None of the above