General Science | Chemistry | Alloys
General Science | Chemistry | Alloys
1. Galvanized iron is coated with
Aluminium
Galena
Silver
Zinc
Correct Answer
Wrong Answer
2. Aluminium surface is often 'Anodized'. This means the deposition of a layer of
Chromium Oxide
Aluminium Oxide
Nickel Oxide
Zinc Oxide
Correct Answer
Wrong Answer
3. Out of the following which is not an alloy?
Steel
Brass
Bronze
Copper
Correct Answer
Wrong Answer
4. The plates of galvanized iron remains protected from rust because the existence of
Lead
Chromium
Zinc
Bung
Correct Answer
Wrong Answer
5. Alloy of which metal is used to make aeroplane and parts of the compartment of the train?
Copper
Iron
Aluminium
None of these
Correct Answer
Wrong Answer
6. Mercury metal mixture is
High colour alloy
Carbon mixed alloy
Mercury mixed alloy
Highly resisting alloy for malfriction
Correct Answer
Wrong Answer
7. Which one of the following metals does not form amalgam?
Zinc
Copper
Magnesium
Iron
Correct Answer
Wrong Answer
8. Solder used in soldering metal pieces consists of any alloy of
Tin and Zinc
Tin and Lead
Tin, Zinc and Copper
Tin, Lead and Zinc
Correct Answer
Wrong Answer
9. Bronze is an alloy of
Copper and Tin
Copper and Silver
Copper and Zinc
Copper and Lead
Correct Answer
Wrong Answer
10. Bronze is an alloy of copper and
Tin
Aluminium
Silver
Nickel
Correct Answer
Wrong Answer
11. Percentage of Silver in German Silver is
1%
5%
0%
None of these
Correct Answer
Wrong Answer
12. Which one of the following elements is not present in the German Silver?
Copper
Aluminium
Zinc
Nickel
Correct Answer
Wrong Answer
13. Which of the following alloys has a maximum percentage of Copper?
Brass
Bronze
German Silver
Gun Metal
Correct Answer
Wrong Answer
14. Which metal exists as a common component in Brass, Bronze and German Silver?
Antimony
Copper
Tin
Zinc
Correct Answer
Wrong Answer
15. Brass is a combination of what metals?
Copper and Nickel
Copper and Tin
Copper and Zinc
Copper + Zinc and Nickel
Correct Answer
Wrong Answer
16. Which pair of following is of Copper alloys?
Brass and invar
Bronze and Nichrome
Brass and Bronze
None of the above
Correct Answer
Wrong Answer
17. Brass gets fade colour in air due to the presence of
Oxygen
Hydrogen sulphide
Carbon dioxide
Nitrogen
Correct Answer
Wrong Answer
18. Combination of which substance in the alloy renders stainless steel non-magnetic?
Carbon
Chromium
Nickel
Molybdenum
Correct Answer
Wrong Answer
19. To make the steel hard requires increase in
The quantity of Carbon
The quantity of Manganese
The quantity of Silicon
The quantity of Chromium
Correct Answer
Wrong Answer
20. Which of the following elements is added to iron to produce steel which can resist high temperature, have high hardness and abrasion resistance?
Aluminium
Chromium
Nickel
Tungsten
Correct Answer
Wrong Answer
21. The important metal used with iron to make it rust free
Aluminium
Carbon
Chromium
Tin
Correct Answer
Wrong Answer
22. Steel is further processed to obtain stainless steel by adding some element. Which one of the following is not used for this purpose?
Carbon
Silicon
Manganese
Nickel
Correct Answer
Wrong Answer
23. The important metal used with iron produce stainless steel is
Aluminium
Chromium
Tin
Carbon
Correct Answer
Wrong Answer
24. Which of the following elements are included in stainless steel?
Chromium, Nickel and Iron
Nickel, Iron and Carbon
Iron, Chromium, Manganese and Carbon
Iron, Zinc, Chromium and Carbon
Correct Answer
Wrong Answer
25. What is mixed with iron to make stainless steel?
Nickel and Copper
Zinc and Tin
Nickel and Tin
Chromium and Nickel
Correct Answer
Wrong Answer
26. How much carbon does steel contain?
0.1-2%
7-10%
10-50%
Zero
Correct Answer
Wrong Answer
27. In the case of rusting, the weight of iron
Increases
Decreases
Remains the same
Uncertain
