Top 350+ Solved Engineering Materials MCQ Questions Answer
Q. Steel cannot be hardened unless it is heated
a. Between the first and second critical point
b. Above the middle critical point
c. Above the lowest critical point
d. Above the highest critical point
e. Between the second and third critical point
Q. Case hardening
a. Is done to get a soft ductile interior with a very hard surface
b. Is done to induce hardness in the core of materials
c. Is followed by tempering
d. Is allowed by carburizing
e. Is preceded by tempering
Q. High ratio of surface to mass tend to
a. Produce smaller depths of hardening
b. Produce non-uniformity in hardness on surface
c. Produce only chilled surfaces
d. Produce surface defects
e. Produce greater depth of hardening
Q. The machine used for determining tensile strength of steel is
a. Hydraulic jack
b. Hydraulic press
c. Mechanical press
d. Universal testing machine
e. None of the above
Q. Toughness of a material means
a. Stress relieving
b. Softening
c. Machinability
d. Strength
e. Fatigue resistance
Q. Blast furnace gas is
a. Used as fuel in a blast furnace
b. A by-product of blast furnace
c. A flue gas discharged to atmosphere
d. Used as a cooking gas
e. Highly poisonous
Q. Materials in order of reducing electrical conductivity are
a. Aluminium, Silver, Gold, Copper
b. Gold, Silver, Copper, Aluminium
c. Copper, Silver, Gold,Aluminium
d. Silver, Copper, Gold, Aluminium
e. None of the above
Q. The critical points for steels
a. Change the chemical composition of steel
b. Cause change in physical properties
c. Indicate the minimum temperature below which structural changes in steel are not possible
d. May change in number on heating or cooling
e. Occur at same temperature for all steels
Q. Grey iron
a. Has low ductility
b. Breaks with appreciable distortion
c. Has brittleness
d. Low compression strength
e. None of the above
Q. Crystal structure of a material is generally examined by
a. Microscope
b. Naked eye
c. Spectroscope techniques
d. X-rays and electron diffraction
e. Optical microscope
Q. If a solid cube is subjected to equal tensile stresses on all its faces the volumetric strain is n times the linear strain, where
a. n = 1
b. n = 2
c. n = 6
d. n = 3
e. n = 9
Q. The process of pulling a rod through series of decreasing diameters is known as
a. Wire drawing
b. Metal spinning
c. Trimming
d. Staking
e. Stretch forming
Q. Line imperfection in a crystal is called
a. Schottky defect
b. Frenkel defect
c. Edge dislocation
d. Any of the above
e. None of the above
Q. The process of polymerisation is associated with
a. Thermo-plastic
b. High speed steel
c. Cast iron
d. Non-ferrous material
e. Non-metallic materials