The product (s) of roasting of a sulphide ore is (are)
Oxide only
Sulphate only
Oxide and sulphate
Dependent on temperature and partial pressure of oxygen & sulphur dioxide
Also checkout these categories
Selenium automation MCQ Physical Measurement MCQ General Biology MCQ Biological Classification MCQ Carboxylic Acids MCQ Computer Fundamental MCQ Series MCQ Hydraulics & Fluid Machineries MCQ Machine Input MI - set 1 MCQ Machine Design MCQ Average MCQ Phylum - Reptilia MCQ
- Annealing of cast iron
- One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C).…
- Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement.…
- __________ of grey cast iron produces white cast iron.
- The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation…
- Which of the following are considered applications of ultrasonic testing?
- Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal &…
- Dephosphorization of molten pig iron is favoured by
- Which of the following is prone to cup and cone fracture?
- Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)
- The delivery pressure of boiler feed water pump compared to the boiler steam pressure is
- Presence of nickel & chromium in steel does not raise its
- High speed steel tools retain their hardness upto a temperature of __________ °C.
- Notched bar test is used for testing the __________ of a material.
- The minimum carbon content in steel should be __________ percent for it to respond to a hardening treatment.
- Which of the following is the largest quantum of pressure?
- __________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C.
- Which of the following is an example of cathodic protection of metals against corrosion?
- The usual energy consumption in electric arc furnace steel making is __________ KWh/ton of steel.
- If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________…
- In the blast furnace, incorporation of water vapour in the blast gives the following effect.
- Recrystallisation temperature of steel is __________ °C.
- At 100% relative humidity, the dew point temperature of moist air is
- Which of the following materials has the least scrap value?
- Consideration of the creep is the most important in case of the
- __________ is a special constituent of chlorophyll without which photosynthesis is not possible.
- Spheroidising of a material is a/an __________ process.
- Tumbling is the process of improving the __________ of the materials/parts.
- The value of for air & most common gases can be safely assumed to be
- Potable water means the water used for