High precision components with complex cavities and sharp features
Components of large size
Porosity free components
Components of such alloys whose constituents do not form alloys readily
C. Porosity free components
Zinc, copper & nickel
Cobalt, chromium & tungsten
Zinc, aluminium & nickel
Nickel, cobalt & vanadium
Mild steel
Concrete
Cast iron
Asbestos cement
Decreasing the surface area of the electrodes
Increasing the concentration of zinc sulphate solution
Increasing the surface area of the electrodes
Increasing the concentration of copper sulphate solution
Convection heat transfer by stirring the fluid and cleaning the heating surface
Conduction heat transfer by reduction in the material thickness and increase in the thermal conductivity
Radiation heat transfer by increasing the temperature and reducing the emissivity
None of these
Geothermal energy is a non-conventional source of energy
Mass is converted into energy in both nuclear fission & fusion reaction
Inhalation of mercury vapour is not harmful for human beings
Inhalation of arsenic causes cancer
370
340
320
300
Precipitation of fine alloy carbides at high temperatures
Refinement of ferrite grain size by working
Decomposition of retained austenite upon heat treatment
Precipitation of complex inter-metallic upon heat treatment
4
6
8
12
10
20
30
40
Grashoff number
Grashoff number & Reynolds number
Reynolds number
Grashoff number & Prandtl number
Temperature - entropy
Temperature - pressure
Enthalpy - entropy
Enthalpy-pressure
2
3
0.8
6
5
1.25
2.5
3.75
More
Equal
Less
Double
Thermal
Electrical
Mechanical
Chemical
The continuous adjustment of the set point index of an automatic control loop by a primary (master) controller
Used when changes in process conditions cause serious upsets in the controlled variable
Useful to control flow from temperature
All 'a', 'b' & 'c'
Air filter
Fuel injector
Exhaust silencer
Battery
Mild steel
Copper
Cast iron
Wrought iron
Specific fuel consumption is very low due to the use of heavy water
Fuel cost is much lower than that used in pressurised water or boiling water reactor
Heavy water is used both as coolant as well as moderator
Both 'b' & 'c'
Increase
Decrease
Remain same
May increase or decrease; depending on the type of metal
Face centred cubic (fcc)
Body centred cubic (bcc)
Orthorhombic
Cubic
Immobility of dislocation
Strain-ageing
Increase in Young's modulus
Strain hardening
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
Borosilicate glass
Silica glass
Soda lime glass
None of these
Suppress martensite transformation
Enhance its working performance in sub zero atmosphere
Reduce the retained austenite in hardened steel
Induce temper brittleness after its hardening
Nickel
Vanadium
Molybdenum
Chromium
Period increases
Period decreases
Group increases
Both 'b' & 'c'
Boring
Counter boring
Drilling
Enlarging
1 : 1
1 : 2
2 : 1
1 : 4
Red
Extended
Super
Extreme