Top 350+ Solved Engineering Materials MCQ Questions Answer
Q. Cast iron containing 6.6% carbon is
a. Black in colour containing only pearlite
b. Black in colour containing only ferrite
c. Gray in colour containing pearite and ferrite only
d. Whitish containing cementite only
e. None of the above
Q. The main alloy for corrosion resistance in stainless steel is
a. Manganese
b. Carbon
c. Vanadium
d. Cobalt
e. Chromium
Q. A steel having ferrite and pearite is
a. Soft
b. Hard
c. Ductile
d. (A) and (B) above
e. (A) and (C) above
Q. Which variety of copper has the best mechanical strength?
a. Annealed copper
b. Hard drawn copper
c. Cast copper
d. Soft copper
e. None of the above
Q. Brinell hardness number for nitrided steel is in the range
a. 60 to 80
b. 100 to 150
c. 300 to 450
d. 700 to 800
e. 200 to 300
Q. Diamagnetic materials are
a. Only slightly magnetised
b. Strongly magnetised
c. Magnetised with eddy currents only
d. Magnetised in a direction opposite to that of the applied field
e. None of the above
Q. Gamma iron has
a. Body centred space lattice structure containing 6 atoms
b. Body centred space lattice structure containing 10 atoms
c. Face centred space lattice structure with 8 atoms
d. Face centred space lattice structure with 14 atoms
e. None of the above
Q. Silicon steel is widely used in
a. Chemical industry
b. For cutting tools
c. Electrical industry
d. For making leaf prings
e. For nuts and bolts
Q. The tendency for brittle fracture increases with
a. Increasing temperature
b. Decreasing strain rate
c. Appreciable plastic deformation before fracture
d. Appreciable plastic deformation during propagation of the crack
e. None of the above
Q. Preheating of material to be welded is necessary in case of
a. Non-ferrous materials
b. Cast iron
c. Stainless steel
d. Carbon steel
e. High speed steel
Q. Steel balls for ball bearings are generally made of
a. Carbon chrome steel
b. Stainless steel
c. Cast steel
d. Nodular cast iron
e. Free carbon steel
Q. The process of reheating the hardened steel to some temperature below the critical range, followed by any rate of cooling is known as
a. Spheroidising
b. Normalising
c. Tempering
d. Annealing
e. Austempering
Q. Delta iron occurs at temperature in the range of
a. Room temperature to 600?C
b. 600?C to critical temperature
c. Between 800?C and 1200?C
d. Between 1400?C and 1530?C
e. None of the above
Q. Which process is used primarily to obtain surface finish
a. Swaging
b. Electroforming
c. Shining
d. Broaching
e. Parkerizing