Top 250+ Solved Metallurgy MCQ Questions Answer
Q. The highest percentage of chrommium that can be added to steel is usually
a. 18 percent
b. 25 percent
c. 15 percent
d. 50 percent
e. 12 percent
Q. Eutectoid steel has a structure of
a. Martensite
b. Bainite
c. Sorbite
d. Nickel
e. A combination of all above
Q. The flux used in blast furnace while melting iron ore is
a. Bauxite
b. Carbon
c. Oxygen
d. Sodium chloride
e. Lime stone
Q. Galvanising layer usually provides protection in the range of water
a. 7 to 14
b. Complete protection is provided
c. 1 to 7
d. 1 to 14
e. 6 to 11
Q. Ferrite is
a. Low specific heat of quenching oil
b. Present in abundance in high carbon steel
c. Soft and ductile
d. Hardenable under rapid cooling
e. Amorphous and brittle
Q. If a sample of steel shows unsymmetrical deformation of a piece in quenching, the probable cause could be
a. Impure quenching oil
b. Low specific heat of quenching oil
c. Excessive proportion of alloying elements
d. Non-uniform heating or cooling
e. Low temperature during heating
Q. Attack of steel is increased by
a. Salt solution below a paint coat
b. Invisible moisture film present prior to painting
c. Graphite in the priming coat
d. Loose rust and partially removed mill scale
e. All of the above
Q. Which allotropic form of iron is magnetic at room temperature?
a. Alpha iron
b. Beta iron
c. Gamma iron
d. Delta iron
e. All of the above
Q. Persence of lead in brass improves
a. Malleability
b. Hardenability
c. Ductility
d. Fatigue resistance
e. Machining properties
Q. Which of the following is a noble metal?
a. Aluminium
b. Chromium
c. Stainless steel
d. Nickel
e. Platinum
Q. Which of the following form of iron is produced as a result of annealing of white cast iron?
a. Wrought iron
b. Spheroidal iron
c. Nodular iron
d. Malleable iron
e. Grey iron
Q. Which colour of heat represents the highest temperature?
a. Low specific heat of quenching oil
b. White
c. Salmon
d. Dry cherry
e. Blood red
Q. The tensile strength of nodular iron may be of the order of
a. 500 kg/cm2
b. 100 kg/cm2
c. 1000 kg/cm2
d. 2000 kg/cm2
e. 4000 kg/cm2
Q. During heat treatment, deformation and volume changes can be minimised by
a. slowly cooling in the martensitic range
b. using surface hardening when possible
c. using alloy steels least prone to such changes
d. Any of the above
e. Low specific heat of quenching oil