Body centred cubic (bcc)
Hexagonal close packed (hcp)
Face centred cubic (fcc)
None of these
C. Face centred cubic (fcc)
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)
Elastic limit
Deflection value
Fatigue resistance
None of these
Its high melting temperature
Chances of cracking
Oxide film formation
Chromium carbide formation
Eutectic temperature
Lower critical temperature
Recrystallisation temperature
Upper critical temperature
Cementite
Pearlite
Martensite
Ferrite
Wet bulb temperature
Dry bulb temperature
Relative humidity
Specific humidity
Speed of the extruded material is same as that of ram speed
Redundant work is a function of the die angle
Relative motion between the billet surface and the container wall is always present
Hollow ram is used for indirect extrusion
Martensitic steels are less susceptible to pitting corrosion than austenitic steels
Pitting corrosion is usually very localised
Hydrogen embrittlement is facilitated by tensile stress
Stress corrosion cracking is facilitated by tensile stress
Number
Weight
Radius
None of these
1
4
18
23
Phosphate coating is used as an excellent base for paints & enamels
Phosphate coating is less corrosion resistant than chromate coating
The base metal to be electroplated is normally made the cathode of the electrolytic cell and coating metal is made the anode
Calorising is the process of coating steel with chromium
Hot temper
Hot hardness
Fatigue
Creep
Cresylic acid
Xanthaies
Pine oil
All 'a' 'b' & 'c'
Fatigue resistance
Tensile strength
Creep resistance
All (A), (B) & (C)
Chemical composition
Carbon content
Grain size
Alloying elements content
Diamagnetic
Ferromagnetic
Ferroelectric
Piezoelectric
Increases the reducing potential of the gas
Increases the flame temperature
No significant change occurs
Increases the hydrogen content in the metal
Charcoal
Calcium carbide
Hydrocarbon oil
Graphite
1 kg/cm2
1 bar
1 atmosphere
1 kilo Pascal
Decarburising
Alloying with cobalt
Purification
Alternate heating & cooling
Machinability
Density
Strength
Plastic deformation
α-rays
β-rays
Gamma rays & neutrons
Electrons
Low vapour pressure
Corrosive nature
High vapour pressure
High boiling point
Less than the wet bulb temperature
More than the wet bulb temperature
More than the dry bulb temperature
Equal to wet bulb temperature
N2O4
N2O
N2O5
N2O3
Weaker in tension but stronger in shear
Weaker in shear but stronger in tension
Stronger in both shear and tension
The lap joints are easily made
Same
Slightly less
Slightly more
Much more
Carbon dioxide
Carbon monoxide
Oxygen
Air
FeO
MgO
CaO
Iron
Copper
Titanium
Aluminium