The critical pressure at which the latent heat of vaporisation of steam becomes zero is __________ Kg/cm2.
273.15
225.65
100.03
373.15
- The most abundant metal present in the earth's crust is;
- Function of fusible plug in a boiler is to
- Thermit welding uses the following energy source.
- The most important consideration in value engineering is the
- Glass reacts with
- Flue gases pass through the following boiler accessories in a high pressure natural circulation boiler.A.…
- Fog is an example of colloidal system of
- With increase in temperature, the electrical conductivity of semiconductors
- __________ is a non volatile film forming constituent of a paint.
- Temperature attained in soldering of metals is about __________ °C.
- Secondary hardening in steels arises out of the
- Cold working of a material results in increase in hardness, which is termed as the __________ hardening.
- Viscoelastic behaviour is observed in __________ materials.
- Hot & cold working of material causes its __________ deformation.
- Silicon percentage in silicon steel used for electrical equipments is about
- In the acid Bessemer process, the hot metal should have the following composition.
- __________ is used for tying the steel columns to concrete foundation.
- Drills are usually made of
- Cascade control is
- Boiling point of water gets lowered at high altitudes (e.g., hills), because
- Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded…
- A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.°K…
- A solar cell converts the sunlight directly into __________ energy.
- Electrolytic reduction cell used for conversion of calcined Al2O3 to Al is a carbon lined furnace operating…
- Which of the following is not an ore of copper?
- What is the range of tempering temperature (°C) for most of the materials?
- For an ideal gas, Cp - Cv is
- For a first order chemical reaction, the concentration of the reactant decreases __________ with time.
- During sensible cooling of air, its wet bulb temperature
- Cold cracking in the heat affected zone of a high strength steel weld can take place because of the