Top 350+ Solved Engineering Materials MCQ Questions Answer
Q. The product of a cupola known as
a. Malleable iron
b. Steel
c. Pig iron
d. Cast iron
e. Cast steel
Q. The process of production of articles having a soft ductile interior and a very hard surface, is known as
a. Hardening
b. Hardening and tempering
c. Case hardening
d. Hardening and annealing
e. None of the above
Q. The blast furnace uses the following as fuel
a. Blast furnace gas
b. Cooking coal
c. Producer gas
d. Coke
e. Coal
Q. If steel is cooled in still air, the structure obtained is
a. Acicular
b. Pearlite
c. Martensite
d. Sorbite
e. Troosite
Q. In reinforced conccrete, steel rods are used to increase
a. Tensile strength
b. Compressive strength
c. Shear strength
d. None of the above
e. Semi-conductors
Q. Lime stone acts as a flux in a cupola. It is generally added in the proportion
a. 30 kg of limestone per tonner of iron
b. One tonne of limestone per tonne of charge
c. 10 kg of limestone per tonne of iron
d. 500 kg of limestone per tonne of coke
e. 100 kg of limestone per tonne of iron
Q. Identify the correct statement
a. A metal which is brittle in tension may be ductile under hydrostatic compression
b. All materials undergo plastic deformation
c. In elastic materials yield stress and tensile strength are practically identical
d. A completely brittle material would not fracture at elastic limit
e. Brittleness is an important engineering consideration, because it allows the materials to redistribute localized stresses
Q. Which of the following is a composite material?
a. Y-alloy
b. High speed steel
c. Tungsten carbide
d. Fibre reinforced plastic
e. None of the above
Q. A material which undergoes no deformation till its yield point is reached and then it flows at a constant stress is known as
a. Rigid plastic
b. Elastic
c. Rigid
d. Plastic
e. Elastic-plastic
Q. In carbon steel castings
a. The percentage of carbon is less than 1.7%
b. The percentage of carbon is between 1.7% to 2%
c. The percentage for alloying elements is controlled
d. (A) and (C) above
e. (B) and (C) above
Q. Nickel is used in
a. cutting tools
b. automatic voltage regulators
c. electrodes of thermionic valves
d. pressure sensitive elements
e. None of the above
Q. In order to improve machinability of steels, the treatment generally done is
a. Cyniding
b. Tempering
c. Spheroidising
d. Annealing
e. Normalising
Q. Induction hardening is the process of
a. Electrical hardening process
b. Hardening surface for wear resistance
c. Hardening the core
d. Selective hardening
e. Uniform hardening
Q. "Troosite" is obtained when
a. Quenching steel during transformation
b. A fully hardened steel is finally drawn at about 677?C
c. Steel is rapidly quenched in oil
d. When alloy steels are rapidly quenched in water
e. None of the above
Q. The semi-conductors have electrical conductivities of the following order (ohm-cm-1)
a. 10?20
b. 10?15
c. 10?3
d. None of the above