FERROUS & NON - FERROUS ALLOYS SET 02

FERROUS & NON - FERROUS ALLOYS SET 02

1. Cast iron can be easily obtained in:
a) Cupola
b) Bessemer converter
c) Open hearth furnace
d) Blast furnace
 

Answer: a
 

Explanation: Iron from its pig iron form is converted to cast iron in a cupola. As pig iron is very weak in strength hence it can not be used for practical purpose.
 

2. Wrought iron can be easily obtained by processing iron ore in:
a) Cupola
b) Bessemer converter
c) Pudding furnace
d) Blast furnace
 

Answer: c
 

Explanation: Iron from its pig iron form is converted to wrought iron in pudding furnace. As pig iron is very weak in strength hence it cannot be used for practical purpose.
 

3. Steel can be easily obtained in:
a) Cupola
b) Blast furnace
c) Pudding furnace
d) Bessemer converter
 

Answer: d 

Explanation: Iron from its pig iron form is converted to steel in Bessemer converter.As pig iron is very weak in strength hence it can not be used for practical purpose.
 

4. Red hardness of an alloy steel can be improved using
a) Tungsten
b) Vanadium
c) Manganese
d) Titanium
 

Answer: a
 

Explanation: Red hardness means capability of material to retain hardness at high temperature. Tungsten has a very high melting point and is used to improve red hardness.
 

5. Abrasion resistance of an alloy steel can be improved using
a) Tungsten
b) Vanadium
c) Manganese
d) Titanium
 

Answer: d
 

Explanation: Titanium has very high abrasive resistance property. Titanium is used to improve abrasive resistance of base metal in an alloy.
 

6. Wear resistance of an alloy steel can be improved using
a) Tungsten
b) Vanadium
c) Manganese
d) Titanium
 

Answer: c
 

Explanation: Manganese has very high wear resistance property. Magnesium is alloyed with base metal to increase its wear resistance property.
 

7. Corrosion resistance of an alloy steel can be improved using
a) Tungsten
b) Vanadium
c) Chromium
d) Titanium
 

Answer: c
 

Explanation: Chromium has very high corrosion and oxidation resistance property. Chromium is alloyed with base metal to increase its corrosion resistance.
 

8. Tensile strength of an alloy steel can be improved using
a) Nickel
b) Vanadium
c) Manganese
d) Titanium
 

Answer: a
 

Explanation: Nickel can improve tensile strength as well as toughness of alloy steel. It is alloyed with base metal in small quantity.
 

9. Which of the following induces fine grain distribution in alloy steel?
a) Nickel
b) Vanadium
c) Manganese
d) Titanium
 

Answer: b
 

Explanation: Vanadium induces fine grain distribution in alloy steel. It helps in improving uniformity in the base metal.
 

10. Alloy of copper and zinc is known as :
a) Brass
b) Bronze
c) Duralium
d) Nichrome
 

Answer: a
 

Explanation: Brass contains 50% copper and 50% zinc. Brass is the alloy of copper and zinc. It has good property of corrosion resistance.