Top 250+ Solved Metallurgy MCQ Questions Answer

From 1 to 15 of 239

Q. Heating elements of electrical heaters are made of

a. Nichrome

b. Tungsten

c. Invar

d. Nicheloy

e. Phosphor bronze

  • a. Nichrome

Q. Which of the following element does not impart hardness to steel?

a. Copper

b. Nickel

c. Silicon

d. Chromium

e. None of the above

  • a. Copper

Q. The property which enables metals to be drawn into wire is known as

a. Plastic deformation

b. Ductility

c. Malleability

d. Elastic deformation

e. Straining

  • b. Ductility

Q. Endentor used in Vickers hardness testing machine is

a. Diamond square-based pyramid

b. 10 mm dia ball

c. 15 mm dia ball

d. 25 mm dia ball

e. Conical indentor with 120? apex angle

  • a. Diamond square-based pyramid

Q. When steel is made from phosphatic iron, it is likely to be

a. Hard

b. Ductile

c. Brittle

d. Tough

e. Malleable

  • c. Brittle

Q. Compressive strength is highest in case of

a. Mild steel

b. Wrought iron

c. High carbon steel

d. Cast iron

e. Low carbon steel

  • c. High carbon steel

Q. In nodular iron, graphite is present in the form of

a. Powder

b. Flakes

c. Needles

d. Spheroids

e. Prisms

  • d. Spheroids

Q. Which hardening process is generally not used for steels?

a. Age hardening

b. Pack carburising

c. Induction hardening

d. Nitriding

e. Cyanidin

  • a. Age hardening

Q. The flux used in brazing is usually

a. Common salt

b. Lime

c. Borax

d. Alum

e. None of the above

  • c. Borax

Q. The electrical conductivity of ferrites is

a. Very high as compared to that of ferromagnetic materials

b. Greater than that of ferromagnetic materials

c. Equal to that of ferromagnetic materials

d. Very low as compared to that of ferromagnetic materials

e. Less than that of ferromagnetic materials

  • e. Less than that of ferromagnetic materials

Q. For normalizing, steel is heated to

a. 900?C

b. 30?C to 60?C above critical temperature

c. 700?C

d. 100?C below critical temperature

e. Critical temperature

  • b. 30?C to 60?C above critical temperature

Q. Steel recommended for induction hardening should have

a. Rough surface

b. Fine grains

c. Low electrical and thermal conductivity

d. Coarse grains

e. Low alloy content

  • b. Fine grains

Q. Major constituent of phosphor bronze is

a. Zinc

b. Copper

c. Phosphorous

d. Aluminium

e. Lead

  • b. Copper

Q. Which of the following material is used for permanent magnets?

a. Duralumin

b. Elnivar

c. Delta metal

d. Invar

e. Alnico

  • e. Alnico

Q. If the steel at room temperature is magnetic, the presence of which constituent can be ruled out?

a. Ferrite

b. Pearlite

c. Austenite

d. Cementite

e. None of the above

  • c. Austenite
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