0
1
1/2
1/3
A. 0
Clamping methods
Electrodes
Current
Filler material
Aluminium
Copper
Titanium
Stainless steel
Graphite
Lead sulphide
Lead
Both (B) & (C)
Tensile
Fatigue
Impact
None of these
Nickel, cobalt & chromium
Tungsten, chromium & cobalt
Manganese, chromium & cobalt
Tungsten, molybdenum & nickel
Medium carbon steel
High carbon steel
Cast iron
Wrought iron
Carburising
Nitriding
Cyaniding
Annealing
Zirconia
Alumina
Bakelite
Tungsten carbide
Wetness
Mass flow rate
Both 'a' & 'b'
Neither 'a' nor 'b'
Malleable iron
Grey cast iron
Chilled cast iron
White cast iron
Stiffness
Malleability
Creep resistance
Tensile strength
Conductor
Insulator
Semi-conductor
None of these
Magnesite
Chrome
Silica
Fireclay
273.15
225.65
100.03
373.15
Blow down valve
Blow off cock
Fusible plug
Safety valve
The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3
Approximately 80% of the aluminium deposited on the cathode comes from cryolite
Sodium is deposited along with aluminium, but is immediately vaporised
Anode effect sets in when the cryolite concentration goes below 40%.
Asbestos cement
Steel
Cement concrete
Stoneware
90% tungsten carbide and 10% cobalt
70% aluminium oxide & 30% silica
30% nickel, 15% chromium & 55% tungsten
65% tungsten & 35% zirconium
Decreases
Increases
Remain same
May increase or decrease; depends on the altitude where snow melts
723
959
1147
1493
Processing of thermosetting plastics is ideally done by injection moulding
Processing of thermoplastics is ideally done by compression moulding
Mass production of seamless pipes are done by electrical resistance welding (ERW)
Stretch forming is a process of cold drawing
Free electrons
Ions
Conduction electrons
Holes
Beryllium
Zirconia
Alumina
Magnesia
Motion of dislocations
Stretching of atomic bonds
Breakage of atomic bonds
None of the above
Stainless steel
Reinforced cement concrete
Cast iron
Asbestos cement
Filmwise condensation gives a lower heat transfer rate than the dropwise condensation
Suitable coating or vapour additive is used to promote film wise condensation
If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it
Reynolds number of condensing liquid is based on its mass flow rate
nλ = 2d Sin θ
λ = d Sin 2θ
λ = 2d Sin 2θ
nλ = d Sin θ
Fire-fighting
Cooling
Drinking
Evaporation to produce steam
Soft
Hard
Tough
Ductile & malleable
<100
>100
About 273
About 373