Chemical Engineering — Test 22
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Question 1
An oxidation process is accompanied with decrease in the____________________?
Question 2
With decrease in the grain size of a material, its creep resistance___________________?
Question 3
Austempering of steel requires it to be heated to 875°C followed by sudden cooling to 250- 525°C, thereby changing austenite to___________________?
Question 4
What is the percentage of chromium in 18-4-1 high speed steel ?
Question 5
Electrometallurgical methods of metal extraction is normally used for those metals___________________?
Question 6
Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________________ kJ ?
Question 7
Hydrogen can be ________________?
Question 8
Air standard Otto cycle is more efficient than the diesel cycle for the same__________________?
Question 9
Percentage of argon (by volume) in dry atmospheric air is about________________?
Question 10
_____________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C ?