MCQs on Engineering Materials with answer

1 -           Which of the following material has maximum ductility?

A.    Mild steel

B.    Copper

C.    Nickel

D.    Aluminium

      Answer= A

               

2 -           Shock resisting steels should have

A.    low wear resistance

B.    low hardness

C.    low tensile strength

D.    toughness

Answer= D

3 -           Cast iron is a

A.    ductile material

B.    malleable material

C.    brittle material

D.    tough material

Answer= C

4 -           Malleable cast iron is produced

  

A.    by adding magnesium to molten cast iron

B.    by quick cooling of molten cast iron

C.    from white cast iron by annealing process

D.    none of these

Answer= C

5 -           Brass is an alloy of

A.    copper and zinc

B.    copper and tin

C.    copper, tin and zinc

D.    none of these

Answer= A

6 -           When the steel is normalized, its

A.    yield point increases

B.    ductility decreases

C.    ultimate tensile strength increases

D.    all of these

Answer= D

7 -           Silicon when added to copper improves

A.    machine ability

B.    hardness

C.    hardness and strength

D.    strength and ductility

Answer= C

8 -           Cast iron is manufactured in

                  A.            blast furnace

                  B.            cupola

                  C.            open hearth furnace

                  D.            bessemer converter

Answer= B

9 -           The lower critical point for all steels is

                  A.            600°C     B.            700°C

                  C.            723°C     D.            913°C

Answer= C

10 -         Hematite iron ore contains iron about

A.    30%        B.            45%

C.    55%        D.            70%

Answer= D