Related Questions

The metals commonly used for electroplating are
A Gold, Sodium and Chromium
B Chromium, Copper and Nickel
C Nickel, Lead and Chromium
D Gold, Sodium and Potassium
Which of the following statements must be false? I. Debaters Y and C are never selected together. II. Debaters Z and B are never selected together . III. Debaters Z and D are never selected together .
A Only I
B Only II
C Only III
D All of these
City High School must put together a debating team consisting of four debaters.There are candidates of equal ability : X,Y and Z who are all seniors; and A,B,C and D who are all juniors..The school requires that there should be two seniors and two juniors in the team.It is also necessary that all of the debaters be able to work with one another. *Debaters Y and A cannot work together. *Debaters Z and C cannot work together. *Debaters A and B cannot work together. which of the following statements must be false? 1.Debaters Y and C are never selected together. 2.Debaters Z and D are never selected together. 3.Debaters Z and D are never selected together.
A Only I
B Only II
C Only III
D All of these
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
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
In the electroplating of gold, the electrolyte used is
A Gold chloride
B Gold nitrate
C Gold sulphate
D Potassium aurocyanide
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
(iv) I have never done any wrong, and will never.
A I have never done any wrong, and will never do.
Which of the following metals forms an amalgam with other metals?
A Tin
B Mercury
C Lead
D Zinc

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