Hardening of steel is not possible, unless it is heated __________ critical point.
Above the highest
Above the lowest
Between the first & second
Between the second & third
- Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative…
- Cold cracking in the heat affected zone of a high strength steel weld can take place because of the
- Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.
- In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb…
- Out of the following, the most malleable material is
- Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid…
- The capacity of a spring to store energy is called the spring form co-efficient. Stiffness of a spring…
- Silicon percentage in acid resistant cast iron is about
- Brittleness induced due to the presence of sulphur in steel can be reduced by adding
- Leakage in a cooking gas cylinder is detected by
- Optical activity is a/an __________ property.
- Which of the following phenomenon will exhibit the minimum heat transfer?
- In the blast furnace, incorporation of water vapour in the blast gives the following effect.
- The majority charge carriers in p-type silicon are
- Blow off cock is provided in steam boiler to
- Which of the following is the most suitable abrasive for grinding high tensile strength materials?
- Glycerine is used as a coolant in cooling of some engines instead of water, because
- The most important requirement for aluminium industry is the availability of cheap
- __________ is the most suitable lubricant for drawing mild steel wires?
- Thermodynamic cycle involved in the working of a thermal power plant is the __________ cycle.
- Runge-Kutta method is used to solve a/an
- A material subjected __________ must have high resilience.
- Fibre glass is a composite material of
- Wrought iron is not
- Lead is poured into the joint between two- __________ pipes.
- __________ iron is produced by the annealing of white cast iron.
- Pick out the wrong statement.
- Addition of __________ to steel does not impart hardness.
- Brazing is the joining of metals
- __________ wire is never used for making the heating element.