1) Increase of carbon content in steel results in

Increase in hardness

Increase in malleability

Increase in strength

Increase in ductility

 

Correct Answer (A)

 

 

3) Which one of the following is the capacity of a metal to withstand destruction under the action of external loads?

Strength

Ductility

Toughness

Stiffness

 

Correct Answer (A)

 

 

4) Which one of the following is the resistance of a metal to elastic deformation ?

Strength

Toughness

Stiffness

Ductility

 

Correct Answer (C)

 

 

5) Which one among the following properties of a metal is the power of return to its original shape after deformation when the load is removed?

Stiffness

Malleability

Ductility

Elasticity

 

Correct Answer (D)

 

 

6) Which one of the following properties of a metai has the ability to change its shape without destruction under the influence of external forces?

Elasticity

Malleability

Plasticity

Stiffness

 

Correct Answer (C)

 

 

7) Which one among the following properties of a metal is the property by which resistance is offered to fracture by repeated bending or twisting?

Brittleness

Malleability

Stiffness

Toughness

 

Correct Answer (D)

 

8) Which one of the following properties is most essential for the metals in the process of casting, welding, brazing and soldering ?

Tenacity

Fusibility

Malleability

Plasticity

 

Correct Answer (B)

 

9) Metals possess physical and mechanical properties. Which one of the foliowing is a physical property of metals?

Fusibility

Malleability

Ductility

Tenacity

 

Correct Answer (A)

 

10) Rust is formed from iron and which other element?

Hydrogen

Oxygen

Nitrogen

Sulphur

 

Correct Answer (B)

 

11) Which of these metals is liquid at room temperature? *

5 points

Lithium

Osmium

Beryllium

Mercury

 

Correct Answer (B)

 

12) In its simplest form, bronze is an alloy of which metals?

Copper, tin and lead

Copper and tin

Copper and zinc

Copper, zinc and nickel

 

Correct Answer (B)

 

13) The ability of a metal to be drawn into wire is a measure of its

Ductility

Malleability

Hardness

Toughness

 

Correct Answer (A)

 

14) Most metals have

High ionization energies

Low electronegativities

High electronegativities

Small atomic radii

 

Correct Answer (B)

 

15) Metals which burn on exposure to air are best stored

Under vinegar

Under alcohol

Underwater

Under kerosene

 

Correct Answer (D)

 

16) Galvanized metals have been covered with a thin sheet of

Chromium

Zinc

Copper

Tin

 

Correct Answer (B)

 

17) Which metal is most abundant in Earth’s crust?

Aluminium

Iron

Copper

Sodium

 

Correct Answer (A)

 

18) The chief chemical property of aluminium is that it is

Soft

Brittle

Tough

Strong

 

Correct Answer (A)

 

19) Gun metal is an alloy of copper

lead and nickel

lead and zinc

tin and zinc

zinc and nickel

 

Correct Answer (C)

 

20) Generally, bearing bushes are made of

Brass

Gun metal

White metal

Copper

 

Correct Answer (B)

 

 

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