Occurs higher in the electro-chemical series of metals
Is exemplified by magnesium plate
Is much cheaper than the cathodic base material to be guarded against corrosion
All (A), (B) & (C)
D. All (A), (B) & (C)
Arsenides of heavy metals
Antimonides of heavy metals
Arsenides & antimonides of heavy metals
Iron, cobalt and nickel
Nickel
Cobalt
Vanadium
Platinum
Product yields and quality cannot be achieved in continuous process, because of long residence time
Sales demand of product is not steady
Same equipment cannot be used for several processes of the same nature
All (A), (B) & (C)
Sequence of operation to be performed
Progress of work performed
Authorisation of work to be performed
Balancing of load on machines
Water
Steam
Foam
Nitrogen
Internal energy
Enthalpy
Entropy
Temperature
Promotes graphite module formation
Improves its ductility
Does not promote graphite flakes formation
Increases the fluidity of molten metal
180°
212°
32°
273°
d1/2
d-1/2
d
d-1
Case carburising
Tempering
Normalising
Annealing
Are magnetised by eddy currents only
Are non-magnetic and cannot be magnetised
Are magnetised in direction opposite to the magnetic field
Can be magnetised in one direction only
Re0.5, Re0.8
Re0.8, Re-0.5
Re0.8, Re0.5
Re-0.8, Re0.5
Providing support for the tubes
Improving heat transfer
Both 'a' & 'b'
Preventing the fouling of tubes & stagnation of shell side fluid
Dislocation climb
Cross-slip
Twinning
Recrystallisation
Nickel
Vanadium
Molybdenum
Chromium
μ , α and θ all have units of m/s
μ , α and θ all have units of m2/s
α and θ have units of m2/s, while μ has unit of m/s
α and θ have units of m/s, while μ has unit of m2/s
Cast iron
Hypo-eutectoid steel
Hyper-eutectoid steel
Eutectoid steel
Neutral
Ideal
Buffer
Zero pH
Mass
Volume
Surface area
All 'a', 'b' & 'c'
Inversely with thermal conductivity
Directly with heat transfer co-efficient
Directly with thermal conductivity
Inversely with the dimension of the solid
Decreases with the increase of concentration of the solute
Increases with the increase of concentration of the solute
Remains constant
Is unity at infinite dilution
Length of the pipe
Diameter of the pipe
Density of the fluid
Velocity of the fluid
Same
Slightly less
Slightly more
Much more
9.5 : 1
12.5 : 1
15.5 : 1
18.5 : 1
Sorbite
Bainite
Martensite
Troostite
1.5
3
5
7
Suppresses any stress concentration produced in the parts
Enhances the yield point of the material
Introduces a compressive layer on the surface
Produces a better surface finish
Dry air
Pure oxygen
Moisture
Sunlight
TNT
CMC
RDX
Lead azide
Malleable
Nodular
Ductile
Grey