Material of construction of foundry crucible is
Lead
Stainless steel
Graphite
Cast iron
- While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen…
- Sub zero treatment of steel is done to
- Pick out the correct statement.
- __________ is not used as a material of construction in thermocouples.
- Mild steel has __________ crystal lattice structure.
- Gantt charts are used for streamlining the
- A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.°K…
- Cementite is in the lamellar form in the __________ phase of steel.
- Wrought iron does not have
- High relative humidity decreases the evaporative process and as the temperature is increased, the relative…
- Steels with high carbon equivalent have poor Weldability, because in these steels during welding
- The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and…
- High endurance limit of carburised machine parts is because of the fact that carburisation
- In TIG welding, thoriated tungsten electrodes are used, because it
- More than 95% of __________ is present in corundum.
- Viscoelastic behaviour is observed in __________ materials.
- A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer…
- Case hardening of a material is
- Speisses is a mixture of the following:
- With decrease in the grain size of a material, its creep resistance
- In an eutectic system, two elements are completely
- Absolute zero pressure can be attained at a temperature of
- Normalising does not __________ of a metal.
- Often earing defects are found during deep drawing operation, because the
- Water flow in the river during flood can be categorised as the __________ flow.
- Even though heat transfer co-efficient in boiling liquids is large, use of fins is advantageous, when…
- The material used for coating the welding electrode is termed as the
- Carbon supply in pack carburising process is in the form of
- The Al2O3 content of cryolite in Hall- Heroult cell is maintained between __________ percent.
- Factor of safety is the ratio of the __________ stress to the working stress.