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
B. Greater dimensional stability of the casting
Pewter
White
Babbitt
Gun
Kudremukh
Kolar
Khetri
Ramagundam
Inversely with thermal conductivity
Directly with heat transfer co-efficient
Directly with thermal conductivity
Inversely with the dimension of the solid
White
Cast
Wrought
Pig
Pitting
Corrosion
Erosion
None of these
Free chlorine
Bromine
Iodine
Potassium permanganate
Stainless steel
Graphite
Copper
Steel
Copper-lead alloys
Babbitts
Bronzes
Cermets
Increases
Decreases
Remain constant
Either (A) or (B), depends on the type of semi-conductor
Machinability
Corrosion resistance
Fluidity
Strength
Applies to elastic deformation
Applies beyond limit of proportionality in stress-strain curve
States that stress is inversely proportional to strain upto elastic limit
None of these
Very low which prevents their ignition by compression
Very high which prevents their ignition by compression
Zero
None of these
p
2 p
0.5 p
0.25 p
10 atm-1
105 atm-1
10 (dimensionless)
105 (dimensionless)
Volume
Pressure
Heat
None of these
1
1.4
1.5
Y = Cp/Cv
Can be determined only experimentally
Can be determined from the stoichiometry of the reaction
Cannot be zero
Can be fractional
Pipe roughness & pipe diameter
Fluid velocity
Type of flowing fluid
Both 'b' & 'c'
Induce stresses in it
Refine its grain structure
Reduce segregation
Improve its mechanical properties
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
Formability
Yield strength
Toughness
Resilience
90% tungsten carbide and 10% cobalt
70% aluminium oxide & 30% silica
30% nickel, 15% chromium & 55% tungsten
65% tungsten & 35% zirconium
25
45
65
20
Indeterminate
Zero
Infinity
Same as that at any other temperature
Cotton, silk and paper
Asbestos, glass, porcelain and mica
Rubber and polymeric resins
All refractory materials
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
Lack of free
Excess of
Decrease in
None of these
Used in I.C. engines as fuel
Liquefied & stored under cryogenic conditions
Produced by electrolysis of water
All (A), (B) & (C)
Creep
Fatigue
Endurance
Tensile
140
180
240
280