5723Chemical EngineeringMedium
Principal alloying element in Elinvar (used for making hair springs for watches) is________?
AAluminium
BZinc
CCopper
DNickel
Correct answer
D. Nickel
Explanation
The correct answer is Nickel.
Correct answer
D. Nickel
Explanation
The correct answer is Nickel.
Chemically, mullite refractories is________?
Multiple effect evaporators ar used to________?
The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is________?
Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of________?
Tempering of a material does not improve its________?
Electrometallurgy is not involved in the extraction of ________ from its ore?