Related Questions

Electrodeposition of metals i.e. electroplating is never done on
A Metals
B Alloys
C Refractories
D Non-metals
Which of the following rectifiers have been used extensively in supplying direct current for electroplating?
A Copper oxide rectifiers
B Selenium rectifiers
C Mercury arc rectifiers
D Mechanical rectifiers
E None of the above
In the electroplating of gold, the electrolyte used is
A Gold chloride
B Gold nitrate
C Gold sulphate
D Potassium aurocyanide
Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances.
A Radioactive
B Organic
C Inorganic
D None of these
The building up of worn and undersized parts, subjected to repeated loads by electroplating is
A Best method
B Extremely hazardous
C Has no effect as regards fatigue strength
D Cheapest method
Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by
A Chemical coagulation
B Floatation & skimming
C Centrifugation
D Ultrafiltration
An important geometrical quantity in the cutting of metals which can be used as a criterion for machinability of metals is
A Cutting speed
B Feed rate
C Shear angle
D Tool geometry
What type of fusion welding process is used for welding sheet metals of all engineering metals (except Cu, Ag) in automobile and air craft industries, pipe and tubing production?
A Thermit welding
B Electroslag welding
C Resistance welding
D Submerged arc Welding
Which of the following metals forms an amalgam with other metals?
A Tin
B Mercury
C Lead
D Zinc
Ceramic nuclear metals compared to solid nuclear metals have
A higher melting points
B low strength at high temperature
C more chances of radiation damage
D poorer corrosion resistance

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