Top 250+ Solved Metallurgy MCQ Questions Answer
Q. If a medium carbon hardened steel shows pearlite structure it may be concluded that
a. Steel contains impurities
b. Presence of cementite
c. Steel has been quenched in oil
d. Steel has been quenched in water
e. Steel has been slowly cooled in furnace
Q. Alpha brass is a (an)
a. Inermediate phase
b. Interstitial compound
c. Substitutional solid solution
d. None of the above
e. 2.10%
Q. Which of the following is a non-destructive test?
a. Tensile test
b. Cupping test
c. Charpy test
d. X-ray test
e. Izod Impact test
Q. For each ton of pig iron produced in blast furnace, the quantity of coke required would be roughly
a. 0.5 ton
b. 0.25 ton
c. 1.4 ton
d. 1.9 ton
e. 0.1 ton
Q. Warping of articles during heat treatment may be due to
a. internal stresses in the article before heating
c. Low specific heat of quenching oil
d. non-uniform cooling
e. non-uniform heating
Q. In eddy current heating of steel, if the depth of heating is to be increased
a. Voltage should be high
b. Some resisting material must be applied on the surface of article to be heated
c. Frequency must be low
d. Time of heating should be high
e. Frequency must be high
Q. The percentage of carbon in cold rolled steel sheets is around
a. 2.10%
b. 0.01%
c. 0.80%
d. 0.10%
e. 1.10%
Q. In a specimen of hardened steel, hard and soft spots indicate
a. Presence of pearlite
b. Fre carbon
c. Presence of cementite
d. Uneven heating
e. Non-uniform composition of steel
Q. A steel piece after hardening is heated to 300?C and then cooled in oil. The property imparted to the steel piece will be
a. Hardness
b. Annealing
c. Low specific heat of quenching oil
d. Toughness
e. Softness
Q. Killed' steel is
a. Steel with less than normal percentage of carbon
b. Steel which has been shaped on a power hammer
c. That steel which is deoxidised in the ladle with silicon and aluminium
d. Steel with more than normal percentage of carbon
e. Steel that has lost its properties due to excessive alloying
Q. Which of the following metal has the lowest specific gravity?
a. Cast iron
b. Monal metal
c. Copper
d. Bronze
e. Magnesium
Q. The crystal structure of most of the common metals is
a. Hexagonal
b. Cubic
c. Orthorhombic
d. Any of the above
e. None of the above
Q. Iron ore which is grey to black in colour and is hard and magnetic, is known as
a. Hematite
b. Siderite
c. Ironite
d. Limonite
e. Magnetite
Q. The slowest cooling rate is achieved when steel is quenched in
a. mixture of water
b. Air
c. Brine
d. fused salt
e. Hardened and tempered