Engineering Materials Objective Questions with Answers - Set 01 - ObjectiveBooks

Engineering Materials Objective Questions with Answers - Set 01

Practice Test: Question Set - 01

1. Which one of the following metals would work-harden more quickly than the others?
    (A) Copper
    (B) Brass
    (C) Lead
    (D) Silver

2. Iron-carbon alloys containing carbon ________ 4.3% are known as hyper-eutectic cast irons.
    (A) Equal to
    (B) Less than
    (C) More than
    (D) None of these

3. Bell metal contains
    (A) 70% copper and 30% zinc
    (B) 90% copper and 10% tin
    (C) 85 - 92% copper and rest tin with little lead and nickel
    (D) 70 - 75% copper and rest tin

4. The temperature required for full annealing in hypereutectoid steel is
    (A) 30° C to 50° C above upper critical temperature
    (B) 30° C to 50° C below upper critical temperature
    (C) 30° C to 50° C above lower critical temperature
    (D) 30° C to 50° C below lower critical temperature

5. The composition of silver solder is
    (A) Silver, copper, zinc
    (B) Silver, tin, nickel
    (C) Silver, lead, zinc
    (D) Silver, copper, aluminium

6. When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.
    (A) Equal to
    (B) Less than
    (C) More than
    (D) None of these

7. Pipes for bicycle frames are made of
    (A) Cold rolled steel
    (B) Hot rolled steel
    (C) Forged steel
    (D) Cast steel

8. The charge of the blast furnace consists of
    (A) Calcined ore (8 parts), coke (4 parts) and limestone (1 part)
    (B) Calcined ore (4 parts), coke (1 part) and limestone (8 parts)
    (C) Calcined ore (1 part), coke (8 parts) and limestone (4 parts)
    (D) Calcined ore, coke and limestone all in equal parts

9. The following element can't impart high strength at elevated temperature
    (A) Manganese
    (B) Magnesium
    (C) Nickel
    (D) Silicon

10. The percentage carbon content in wrought iron is about
    (A) 0.02
    (B) 0.1
    (C) 02
    (D) 0.4

11. Heavy duty leaf and coil springs contain carbon of the following order
    (A) 0.2%
    (B) 0.5%
    (C) 0.8%
    (D) 1.0%

12. The silicon steel is widely used for
    (A) Connecting rods
    (B) Cutting tools
    (C) Generators and transformers in the form of laminated cores
    (D) Motor car crankshafts

13. Blast furnace produces following by reduction of iron ore
    (A) Cast iron
    (B) Pig iron
    (C) Wrought iron
    (D) Malleable iron

14. For a steel containing 0.8% carbon
    (A) There is no critical point
    (B) There is only one critical point
    (C) There are two critical points
    (D) There can be any number of critical points

15. Nickel in steel
    (A) Improves wear resistance, cutting ability and toughness
    (B) Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties
    (C) Improves cutting ability and reduces hardenability
    (D) Gives ductility, toughness, tensile strength and anti-corrosion properties

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