Engineering Materials 17

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Objective Questions and Answer: Engineering Materials 17

Subject: Engineering Materials 17

Part 17: Objective questions and answers of Engineering Materials


Q1. Maximum percentage of carbon in austenite is

a) 0.03%

b) 0.26%

c) 0.80%

d) 1.7%.


Q2. Corrosion resistance of steel is increased by addition of

a) Chromium and nickel

b) Sulphur, phosphorus, lead

c) Vanadium, aluminium

d) Tungsten, molybdenum, vanadium, chromium


Q3. In which of the following cases, consideration of creep is important

a) Flywheel of steam engine

b) Cast iron pipes

c) Cycle chains

d) Gas turbine blades


Q4. The most effective inhibitor of grain growth, when added in small quantities is

a) Carbon

b) Vanadium

c) Manganese

d) Cobalt


Q5. Depth of hardness of steel is increased by addition of

a) Nickel

b) Chromium

c) Tungsten

d) Vanadium


Q6. Railway rails are normally made of

a) Mild steel

b) Alloy steel

c) High carbon

d) Tungsten steel


Q7. Pick up the wrong statement

a) Aluminium in steel results in excessive grain growth

b) Manganese in steel induces hardness

c) Nickel and chromium in steel help in raising the elastic limit and improve the resilience and ductility

d) Tungsten in steels improves magnetic properties and hardenability


Q8. Pick up the wrong statement Nickel and chromium in steel help in

a) Providing corrosion resistance

b) Improving machining properties

c) Providing high strength at elevated temperatures

d) Raising the elastic limit


Q9. Machining properties of steel are improved by adding

a) Sulphur, lead, phosphorous

b) Silicon, aluminium, titanium

c) Vanadium, aluminium

d) Chromium, nickel


Q10. Eutectoid steel contains following percentage of carbon

a) 0.02%

b) 0.30%

c) 0.63%

d) 0.80%


Q11. The basic constituents of Hastelloy are

a) Aluminium, copper etc.

b) Nickel, molybdenum etc.

c) Nickel, copper, etc.

d) All of the above


Q12. Basic constituents of Monel metal are

a) Nickel, copper

b) Nickel, molybdenum

c) Zinc, tin, lead

d) Nickel, lead and tin


Q13. German silver is an alloy of

a) Silver and some impurities

b) Refined silver

c) Nickel, copper and zinc

d) Nickel and copper


Q14. Surveying tapes are made of a material having low coefficient of expansion and enough strength. The alloy used is

a) Silver metal

b) Duralumin

c) Hastelloy

d) Invar.


Q15. A cold chisel is made of

a) Mild steel

b) Cast iron

c) H.S.S.

d) High carbon


Q16. An engineer's hammer is made of

a) Cast iron

b) Forged steel

c) Mild steel

d) High carbon steel


Q17. Inconel is an alloy of

a) Nickel, chromium and iron

b) Nickel, copper

c) Nickel, chromium

d) Nickel, zinc


Q18. By severely deforming a metal in a particular direction it becomes

a) Ductile

b) Malleable

c) Homogeneous

d) Anisotropic.


Q19. Solder is an alloy consisting of

a) Tin, antimony, copper

b) Tin and copper

c) Tin and lead

d) Lead and zinc


Q20. Cyaniding is the process of

a) Dipping steel in cyanide bath

b) Reacting steel surface with cyanide salts

c) Adding carbon and nitrogen by heat treatment of steel to increase its surface hardness

d) Obtaining cyanide salts


Part 17: Objective questions and answers of Engineering Materials


Q1. Answer d

Q2. Answer a

Q3. Answer d

Q4. Answer b

Q5. Answer b

Q6. Answer c

Q7. Answer a

Q8. Answer b

Q9. Answer a

Q10. Answer d

Q11. Answer b

Q12. Answer a

Q13. Answer d

Q14. Answer d

Q15. Answer d

Q16. Answer d

Q17. Answer a

Q18. Answer d

Q19. Answer b

Q20. Answer c

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