E = 2G (1 + v)
E = G (1 + v)
E = G (1 + v)/2
E = 2G (1 + 2v)
A. E = 2G (1 + v)
Alloy steel
Grey cast iron
Mild steel
High carbon steel
SiO2
Al2O3
MnO2
P
Flatness
Angle
Rotor balancing
Roughness
Storm
Rain
Clear weather
Cold wave
<100
>100
About 273
About 373
110
85
60
45
Makes it usable in almost all magnetic circuits where alternating current is used
Increases its electrical resistivity and decreases the hysteresis loss
Is present upto 5% & 4% respectively when used in transformers & motor armatures
All 'a', 'b' & 'c'
Complete unity of command exists in a line organisation
Line organisation is net suitable for expansion and growth of an industry
In line and staff organisation, line executes and staff directs
None of these
Both specific humidity & dry bulb temperature increases
Both specific humidity & dry bulb temperature decreases
Specific humidity decreases & dry bulb temperature increases
Specific humidity increases & dry bulb temperature decreases
Steel
Glass wood
Copper
Fireclay bricks
Aluminium
Stainless steel
Brass
Copper
Composition
Temperature
Both (A) & (B)
Neither (A) nor (B)
PCl5
Quick lime
CaCl2
Concentrated H2SO4
A fine, highly dislocated and strong martensite
Fine dispersions of inter-metallic of Fe, Ni, Ti etc
Fine dispersions of alloy carbides in a ferrite matrix
Fine dispersions of C nucleated on dislocations in austenite
Wetness
Mass flow rate
Both 'a' & 'b'
Neither 'a' nor 'b'
Reduced chance of gas porosity
Greater dimensional stability of the casting
Uniform flow of molten metal into the mould cavity
Less sand expansion type of casting defect
1 : 1
1 : 2
2 : 1
1 : 4
TNT
CMC
RDX
Lead azide
Case carburising
Tempering
Normalising
Annealing
5
10
20
35
Nitrogen oxides
Hydrocarbons
Both 'a' & 'b'
Carbon monoxide
Stellite
High speed steel
Cermet
Alnico
Both annealing and normalising release the internal stresses of the material besides improving the mechanical properties
Low carbon steel does not respond to the heat treatment for hardening of the material, hence it is subjected to case hardening or surface hardening processes like cyaniding, carburising, nitriding etc., which produces high carbon outer layers resulting in increase of surface hardness
Induction hardening and flame hardening techniques are also used for surface hardening
Martempering of a material is a hardening process
Runner
Cylinder
Mold
None of these
Impact
Torsion
Hardness
Charpy
Slip
Fracture
Winning
Dislocation
Decrease gradually
Increase gradually
Increase rapidly
Remain constant
Same
Slightly less
Slightly more
Much more
Alumina
Alkali oxide
Lime & Magnesia
None of these