Top 350+ Solved Engineering Materials MCQ Questions Answer
Q. When a Ge-crystal is doped with phosphorous atom, it becomes
a. Photo sensitive
b. N-type semi-conductor
c. A ferite
d. An insulator
e. P-type semi-conductor
Q. The graphite rods in a nuclear pile
a. Furnish alpha beta particles
b. Furnish alpha particles
c. Furnish neutron to fission U235
d. Undergo combustion which triggers the fission reaction
e. Convert fast moving neutrons into thermal neutrons
Q. Bakelite is
a. a semi-conductor
b. uncombustible
c. a low resistance conducted
d. a polarised insulator
e. None of the above
Q. The material which undergo recoverable deformation and exhibit rubber like elsticity are called
a. Pure elastic materials
b. Elastomers
c. Rubbers
d. Creep-elastic
e. None of the above
Q. Cold worked components are generally subjected to
a. Annealing
b. Hardening
c. Shot peening
d. Tempering
e. Sherodising
Q. Figure of merit is used to
a. compare the efficiency of chermoelectric materials
b. measure the extent of doping of intrinsic semi-conductors
c. compare the extent of purity of semi-seonuctor materials
d. None of the above
e. None of the above
Q. An elastic behaviour of materials is expressed in terms of
a. Hysteresis loop area
b. Adiabatic time
c. Relaxation time
d. Isothermal time
e. Stress strain curve
Q. Metal spinning
a. Is done on symmetrical articles
b. Utilises point hard tools
c. Is done on unsymmetrical articles
d. Does not require dies
e. Is done at low speeds
Q. Trimming is a process associated with
a. Machining of metals
b. Press work
c. Electro plating
d. Polishing of metals
e. Forging
Q. The property by which a body returns to its original shape after the removal to the load is called
a. Softness
b. Plasticity
c. Elasticity
d. Ductility
e. Malleability
Q. The phenomenon of weld decay is found in
a. Cast iron
b. Bronze
c. Brass
d. Gun metal
e. Stainless steel
Q. Which of the following is the major constituent of corundum?
a. Carbon
b. SiO2
c. Diamond
d. MgCl2
e. Al2O3
Q. Which of the following material has highest specific gravity?
a. High carbon steel
b. Copper
c. Brass
d. Lead
e. Aluminium
Q. The operation of cutting out flat areas to some desired shape and which is generally the first step in a series of operations is known as
a. Lancing
b. Coining
c. Slitting
d. Curling
e. Blanking