Top 350+ Solved Engineering Materials MCQ Questions Answer
Q. Selenium is
a. Intrinsic semi-conductor
b. Extrinsic semi-conductor
c. P-type semi-conductor
d. N-type semi-conductor
e. None of the above
Q. Which of the following is not a semi-conductor?
a. Silicon
b. Tetraethyl lead
c. Gallium Arsenide
d. Germanium
e. All of the above
Q. The main constituent of dynamite is
a. Sulphur
b. Oxygen
c. Nitroglycerine
d. Potassium chlorate
e. Sodium nitrate
Q. To chck the performance of a substance in deep drawing, the test usually conducted is
a. Charpy test
b. Fatigue test
c. Cupping test
d. Tensile test
e. Izod test
Q. Which of the following is the characteristic of ceramic materials?
a. Malleability and ductility
b. Hardness and brittleness
c. Elasticity and plasticity
d. Porosity and flexibility
e. None of the above
Q. Sheradising process is used for
a. Cold working on metals
b. Heat treatment of steels
c. Machining metals
d. Heat treatment of high speed steels
e. Surface coating
Q. Nichrome are alloys of
a. Nickel, chromium and aluminium
b. Nickel, chromium
c. Nickel, chromium and silver
d. Nickel, chromium and iron
e. Nickel, chromium and copper
Q. Identify the incorrect statement
a. The greatest error in Briuell hardness measurements occur in measuring the diameter of specimen
b. Harder the material, greater the elastic recovery after deformation
c. Owing to elastic recovery, the radius of curvature of the indentation will be larger than that of the spherical indentor
d. None of the above
e. Resilience
Q. The modulus of elasticity E, the bulk modulus of elasticity K and the Poisson's ratio are related by the relation
a. K = (1 +
b. E = K (1 -
c. E = 3K (1 - 2
d. E = K (2 +
e. E = 2K (1 +
Q. Phenol and formaldehyde are polymerised to a resultant product known as
a. PVC
b. Bakelite
c. Polyester
d. None of the above
e. Semi-conductors
Q. In pack-carburising carbon is supplied
a. In the form of charcoal
b. Through gas
c. In the form of hydrocarbons
d. In the form of calcium carbide
e. In the form of graphite
Q. Identify the incorrect statement, if any
a. Dislocations in real crystals are generally straight lines which are generally in same plane
b. Dislocations in real crystals are rarely straight lines and rarely lie in a single plane
c. A dislocation is the linear lattice defect that is responsible for nearly all aspects of the plastic deformation of metals
d. The strain field at the dislocation results in a different intensity
e. The strain field at the dislocation results in a different intensity
Q. Brinell hardness number for soft brass is usually in the range
a. 300-450
b. 50-70
c. 10--50
d. 80-150
e. 150-300
Q. Compressve strength of wood is usually
a. Zinc
b. Maximum at 45? to the direction of grains
c. More along the grains
d. Equal in all directions
e. More across the grains
Q. Fatigue cracks in metals normally start at
a. Centre of the specimen
b. Surface of the specimen
c. Any spot in the specimen
d. Ends of the specimen
e. Core of the specimen