Engineering Materials Set 2

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This set of Engineering Materials Multiple Choice Questions & Answers (MCQs) focuses on Engineering Materials Set 2

Q1 | Which of the following is a composite material?
  • Y-alloy
  • High speed steel
  • Tungsten carbide
  • Fibre reinforced plastic
  • None of the above
Q2 | A material which undergoes no deformation till its yield point is reached and then it flows at a constant stress is known as
  • Rigid plastic
  • Elastic
  • Rigid
  • Plastic
  • Elastic-plastic
Q3 | In carbon steel castings
  • The percentage of carbon is less than 1.7%
  • The percentage of carbon is between 1.7% to 2%
  • The percentage for alloying elements is controlled
  • (A) and (C) above
  • (B) and (C) above
Q4 | Nickel is used in
  • cutting tools
  • automatic voltage regulators
  • electrodes of thermionic valves
  • pressure sensitive elements
  • None of the above
Q5 | In order to improve machinability of steels, the treatment generally done is
  • Cyniding
  • Tempering
  • Spheroidising
  • Annealing
  • Normalising
Q6 | Induction hardening is the process of
  • Electrical hardening process
  • Hardening surface for wear resistance
  • Hardening the core
  • Selective hardening
  • Uniform hardening
Q7 | Troosite" is obtained when
  • Quenching steel during transformation
  • A fully hardened steel is finally drawn at about 677?C
  • Steel is rapidly quenched in oil
  • When alloy steels are rapidly quenched in water
  • None of the above
Q8 | The semi-conductors have electrical conductivities of the following order (ohm-cm-1)
  • 10?20
  • 10?15
  • 10?3
  • None of the above
Q9 | Cast iron containing 6.6% carbon is
  • Black in colour containing only pearlite
  • Black in colour containing only ferrite
  • Gray in colour containing pearite and ferrite only
  • Whitish containing cementite only
  • None of the above
Q10 | The main alloy for corrosion resistance in stainless steel is
  • Manganese
  • Carbon
  • Vanadium
  • Cobalt
  • Chromium
Q11 | A steel having ferrite and pearite is
  • Soft
  • Hard
  • Ductile
  • (A) and (B) above
  • (A) and (C) above
Q12 | Which variety of copper has the best mechanical strength?
  • Annealed copper
  • Hard drawn copper
  • Cast copper
  • Soft copper
  • None of the above
Q13 | Brinell hardness number for nitrided steel is in the range
  • 60 to 80
  • 100 to 150
  • 300 to 450
  • 700 to 800
  • 200 to 300
Q14 | Diamagnetic materials are
  • Only slightly magnetised
  • Strongly magnetised
  • Magnetised with eddy currents only
  • Magnetised in a direction opposite to that of the applied field
  • None of the above
Q15 | Gamma iron has
  • Body centred space lattice structure containing 6 atoms
  • Body centred space lattice structure containing 10 atoms
  • Face centred space lattice structure with 8 atoms
  • Face centred space lattice structure with 14 atoms
  • None of the above
Q16 | Silicon steel is widely used in
  • Chemical industry
  • For cutting tools
  • Electrical industry
  • For making leaf prings
  • For nuts and bolts
Q17 | Moh's scale of hardness has the range
  • 10--15
  • 1--5
  • 1--3
  • 1--10
  • 5--10
Q18 | The tendency for brittle fracture increases with
  • Increasing temperature
  • Decreasing strain rate
  • Appreciable plastic deformation before fracture
  • Appreciable plastic deformation during propagation of the crack
  • None of the above
Q19 | Preheating of material to be welded is necessary in case of
  • Non-ferrous materials
  • Cast iron
  • Stainless steel
  • Carbon steel
  • High speed steel
Q20 | Steel balls for ball bearings are generally made of
  • Carbon chrome steel
  • Stainless steel
  • Cast steel
  • Nodular cast iron
  • Free carbon steel
Q21 | The process of reheating the hardened steel to some temperature below the critical range, followed by any rate of cooling is known as
  • Spheroidising
  • Normalising
  • Tempering
  • Annealing
  • Austempering
Q22 | Delta iron occurs at temperature in the range of
  • Room temperature to 600?C
  • 600?C to critical temperature
  • Between 800?C and 1200?C
  • Between 1400?C and 1530?C
  • None of the above
Q23 | Which process is used primarily to obtain surface finish
  • Swaging
  • Electroforming
  • Shining
  • Broaching
  • Parkerizing
Q24 | In normalising steel is heated 40-50 C
  • Above the upper transformation range
  • Above the lower transformation range
  • Below the lower transformation range
  • Above room temperature
  • Below the upper transformation range
Q25 | Which of the following metals has high tendency to get work hardened?
  • Lead
  • Silver
  • Brass
  • Aluminium
  • Copper