Top 250+ Solved Metallurgy MCQ Questions Answer

From 91 to 105 of 239

Q. Spherical metal powders are usually produced by

a. Milling

b. Electrolytic process

c. Oxidation

d. Automization

e. Reduction

  • d. Automization

Q. In Brinell hardness testing the timer for loading is

a. 15 seconds

b. 1 second

c. 5 seconds

d. 1 minute

e. 2 seconds

  • a. 15 seconds

Q. The stainless steels owe their resistance to corrosion to the presence of

a. Chromium

b. Carbon

c. Sulphur

d. Manganese

e. Nickel

  • a. Chromium

Q. The effect of austenitic grain size development during heat treatment is

a. lower hardenability

b. greater toughness

c. lower internal stress

d. All of the above

e. Low specific heat of quenching oil

  • b. greater toughness

Q. Warping may be avoided when quenching a long slender piece of work by

a. Holding the work piece between clamps and pouring water on it

b. Hoding the work piece vertically over the quenching bath and plunging it straight

c. Pulling the piece from both ends

d. Holding the piece horizontally in adequate supports

e. None of the above

  • b. Hoding the work piece vertically over the quenching bath and plunging it straight

Q. Which of the following is not a hardening process?

a. Nitriding

b. Carburising

c. Cyaniding

d. Sphcroidizing

e. Induction hardening

  • d. Sphcroidizing

Q. The maximum percentage of carbon in austenite is

a. 2%

b. 2.70%

c. 1.70%

d. 0.07%

e. 0.70%

  • c. 1.70%

Q. Nichrome contains

a. Nickel, lead and zinc

b. Nickel and copper

c. Nickel and chromium

d. Nickel, copper and vanadium

e. Nickel, chromium and vanadium

  • c. Nickel and chromium

Q. Free cutting steels usually have sulphur content of

a. 0.02 percent

b. 0.21 percent

c. 2 percent

d. 10 percent

e. 0.002 percent

  • b. 0.21 percent

Q. Fusible plug for boilers consists of

a. Zinc, bismuth and tin

b. Lead, tin and mercury

c. Copper, lead and tin

d. Bismuth, lead and tin

e. Zinc, copper and lead

  • d. Bismuth, lead and tin

Q. Stellite contains

a. Nickel, zinc and aluminium

b. Nickel, copper and zinc

c. Cobalt, chromium and tungsten

d. Copper, tin and lead

e. Cobalt, vanadium and nickel

  • c. Cobalt, chromium and tungsten

Q. For producing cast iron pipes by centrifugal casting method the core used is

a. Wax core

b. Clay core

c. Metallic core

d. Sand core

e. No core is used

  • e. No core is used

Q. Mild steel has the structure of

a. BCC

b. Cubic

c. FCC

d. HCC

e. Orthorhombic

  • a. BCC

Q. Which of the following furnace is used to convert liquid pig iron into steel?

a. Open hearth furnace

b. Cupola

c. Converter

d. Induction arc furnace

e. Low specific heat of quenching oil

  • c. Converter

Q. Lowest melting point may be expected for

a. Brass

b. Lead

c. Zirconium

d. Copper

e. Aluminium

  • b. Lead
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