Top 250+ Solved Metallurgy MCQ Questions Answer
Q. Bronze is an alloy
a. Copper, lead and tin
b. Copper, zinc and tin
c. Copper, zinc and tin
d. Zinc, nickel and tin
e. Nickel, aluminium and copper
Q. Which of the following material does not have hexagonal close packed structure?
a. Alpha iron
b. Zinc
c. Magnesium
d. Cadmium
e. Titanium
Q. The minimum carbon percentage required in steel so that it may respond to hardening by heat treatment is
a. 0.02 percent
b. 0.08 percent
c. 0.2 percent
d. 0.8 percent
e. Low specific heat of quenching oil
Q. In grey cast iron, carbon is present in the form of
a. Cementite
b. Flakes
c. Powder
d. Spheroids
e. None of the above
Q. Which of the following affects the hardenability of steel?
a. Austenitic composition
b. Austenitic grain size
c. Amount, nature and distribution of undissolved or insoluble particles in austenite
d. All of the above
e. Low specific heat of quenching oil
Q. Electric process for steel making is used in which of the following steel plant?
a. Bhilai
b. Bokaro
c. Durgapur
d. TISCO
e. None of the above
Q. In a diamagnetic material the effect of an applied magnetic field is that
a. A net dipole moment is induced in the material
b. There is a net reduction in flux density
c. The induced magnetism is in opposition to applied field
d. All of the above
e. None of the above
Q. In tool steel the percentage of silicon is usually restricted to
a. 1 percent
b. 2 percent
c. 0.5 percent
d. 0.2 percent
e. 5 percent
Q. The highest rate of quenching is possible in
a. Cold furnace
b. Oil
c. Air
d. Water
e. Hot furnace
Q. There are 14 atoms in a unit cell of
a. Body centred cubic space lattice
b. Face centred cubic space lattice
c. Close packed hexagonal space lattice
d. All of the above
e. None of the above
Q. Coarse grained steels
a. Are less tough
b. Are less liable to distortion
c. Have poor machinability
d. Have leser depth hardening power
e. None of the above
Q. During heat treatment the formation of thick layer of scale on the surface of steel articles is mainly due to
a. oxidation
b. excessive hardness
c. Low specific heat of quenching oil
d. coarse grain structure
e. reduction
Q. Ultimate tensile strength is least in case of
a. Cast iron
b. Mild steel
c. Wrought iron
d. High carbon steel
e. Low carbon steel