Top 350+ Solved Engineering Materials MCQ Questions Answer
Q. Cold shuts are
a. Saturation of pores in bricks
b. Saturation of pores in metals by subsituting materials different from parent materials
c. Defects in castings due to two streams of metal which are too cold to fuse properly
d. Forging defects due to improper heating of materials
e. None of the above
Q. The property of metal when the recovery after unloading is complete but not instantaneous is
a. Plsticity
b. Visco elasticity
c. An elasticity
d. Inelasticity
e. Elasticity
Q. Cast irons are generally specified by
a. Hardness
b. Carbon percentage
c. Tensile strength
d. Iron percentage
e. Process of manufacture
Q. Identify the incorrect statement
a. Hot working performed on the metals is in a plastic state
b. Much greater pressures are needed for ot working than for cold working
c. When material is cold worked the resulting change in material shape brings about marked changes in the grain structure
d. Structural changes in cold working are grain fragmentation and lattice distortion
e. Residual stresses are set up in cold working
Q. Galvanizing is generally done on
a. Low carbon steels
b. Cast iron
c. Non-ferrous metals
d. Non-metallic substances
e. None of the above
Q. A Babitt is
a. A cutectic of iron and iron phosphide
b. A gadget for measuring volume
c. A measure of magnetic induction produced in a material
d. None of these
e. Antimony bearing lead or tin alloy
Q. Which of the following colour of light has the least wavelength?
a. Violet
b. Green
c. Blue
d. Orange
e. Red
Q. The process in which steel is heated 20? to 40?C below the lower critical temperature, held there for a prolonged period and then allowed to cool slowly in the furnace is known as
a. Annealing
b. Tempering
c. Normalising
d. Austempering
e. Spheroidising
Q. The fine grained steel
a. Are brittle
b. Are lighter
c. Are doctile
d. Have more tendency to distort
e. None of the above
Q. An atom containing an odd number of electrons is said to be
a. Hypermagnetic
b. Paramgnetic
c. Ferromagnetic
d. Diamagnetic
e. Dielectric
Q. For heavy loads in aircraft bearings the material used with lead to reduce the risk of scizure is
a. Silver
b. Copper
c. Iron
d. Tin
e. Zinc
Q. The raw material for mini steel plants is
a. Iron ore
b. Pig iron
c. Grey iron
d. CI and steel scrap
e. None of the above
Q. Which type of electron pair exists in a semi-conductor?
a. Ionic
b. Non-ionic
c. Homopolr
d. Hetropolar
e. None of the above
Q. A body which is permanently deformed is said to have undergone
a. Elastic deformation
b. Limit of elastic deformation
c. Uniform deformation
d. Non-uniform deformation
e. None of the above
Q. In Charpy impact test, the specimen is held as a
a. cantilever
b. simply supported beam
c. fixed beam
d. hinged beam
e. None of the above