Top 350+ Solved Engineering Materials MCQ Questions Answer
Q. Chromium when added as an alloying element to steels
a. Increases corrosion resistance
b. Increases red hardness
c. Refines the grain structure
d. Improves mechanical properties
e. Softens the material
Q. The essential gradient of any hardened steel is
a. Martensite
b. Cementite
c. Pearlite
d. Carbon
e. Austenite
Q. Which type of thermostat is generally used in applicances with heating elements?
a. Bimetallic
b. Magnetic
c. Clad metal
d. Ferromagenetic
e. None of the above
Q. In order to measure/detect materials by non-destructive testing the method generally used is
a. Mossbanser effect
b. Thermochemic point
c. Infrared radiometer
d. Liquid crystallography
e. Acoustic emission
Q. The defect blow hole in castings is caused due to
a. Hard ramming
b. Excessive moisture
c. Improper venting
d. Excessive carbouacious material
e. Any of the above
Q. Spring steels should have high resistance to
a. Shocks
b. Fatigue
c. Corrosion
d. Deformation
e. All of the above
Q. The theory of failure generally applied in case of brittle materials is
a. Maximum shear stress theory
b. Maximum principal stress theory
c. Theory of superposition
d. Maximum strain energy theory
e. Maximum shear strain energy theory
Q. All of the following are destructive tests on materials EXCEPT
a. Charpy test
b. Tensile test
c. Cupping test
d. Fatigue test
e. Shore's scleroscope hardness test
Q. If steel is quenched in oil the structure obtained is
a. Acicular
b. Troosite
c. Pearlite
d. Sorbite
e. Martensite
Q. Which of the following is p-type semi-conductor?
a. Selenium
b. Silicon doped with phosphorous
c. Silicon doped with gallium
d. All of the above
e. None of the above
Q. The amount of energy expended by the action of external force in deforming an elastic body is known as
a. Elastic energy
b. Deformation energy
c. Strain energy
d. Work done
e. Potential energy
Q. When the atomic magnetic moments are randomly oriented in a solid, its magnetic behaviour is termed as
a. polycrystalline
b. anti-ferromagnetic
c. paramagnetic
d. semi-magnetic
e. None of the above
Q. Plastic are
a. Good conductors of heat and bad conductors of electricity
b. Good conductors of heat as well as electricity
c. Bad conductors of heat and good conductors of electricity
d. Bad conductors of heat as well as electricity
e. Semi-conductors
Q. Which of the following does not contain copper as one of the alloying elements?
a. Monel metal
b. Perminivar
c. Nichrome
d. Manganin
e. All of the above