Metallurgy Set 5

Mechanical Engineering

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This set of Metallurgy Multiple Choice Questions & Answers (MCQs) focuses on Metallurgy Set 5

Q1 | Which of the following is usually made of dead mild steel?
  • Flanges
  • Shafts
  • Spades
  • Gears
  • Fish plates
Answer: Flanges
Q2 | The fastest cooling rate is achieved when steel is quenched in
  • Brine
  • Soldering
  • Oil
  • Water
  • Air
Answer: Brine
Q3 | An operation on steel aimed at softening the steel to improve machinability is known as
  • Annealing
  • Cold working
  • Softening
  • Temperature
  • Shot blasting
Answer: Annealing
Q4 | Which of the following material can bear sudden and excessive shocks better?
  • White iron
  • Pig iron
  • Wrought iron
  • All have same shock bearing capacity
  • Cast iron
Answer: Wrought iron
Q5 | The process for steel making used at TISCO, Jamshedpur is
  • Duplex process
  • Open hearth process
  • Bessemmer process
  • L-D process
  • Electric process
Answer: Duplex process
Q6 | In Brinell hardness testing the minimum thickness of the specimen should be
  • More than 10 times the depth of impression
  • Less than 10 times the depth of impression
  • Less than 5 times the depth of impression
  • Thickness of specimen has no relevance to the depth of impression
  • Equal to 10 times the depth of impression
Answer: More than 10 times the depth of impression
Q7 | Vicker's hardness number of diamond could be of the order of
  • 8000
  • 800
  • 4000
  • 15000
  • 12000
Answer: 8000
Q8 | Carbon percentage in cutlery stainless steel is
  • 1.35 to 1.65 percent
  • 1.1 to 1.35 percent
  • 1 percent
  • 0.76 to 0.80 percent
  • 0.25 to 0.30 percent
Answer: 0.25 to 0.30 percent
Q9 | The crystal structure of gamma iron is
  • BCC
  • Combination of all above
  • ACP
  • Cubic
  • FCC
Answer: FCC
Q10 | High carbon steels intended to be quenched in water should have manganese percentage less than
  • 1.5 percent
  • 0.5 percent
  • 2 percent
  • 1 percent
  • No manganese percent
Answer: 0.5 percent
Q11 | A fine grained steel will have the number of grains per square centimeter as
  • 100 to 150
  • 150 to 1000
  • 16 to 56
  • 3 to 16
  • 56 to 100
Answer: 3 to 16
Q12 | Uniformity of zinc coating on pipes is tested by
  • Dipping the sample in water
  • Dipping the sample for 10 minutes in calcium hydroxide solution
  • Dipping the sample for 1 minute in conc, hydrochloric acid
  • Dipping the sample for 1 minute in neutral copper sulphate solution
  • By passing electric current for 1 hour
Answer: Dipping the sample for 1 minute in neutral copper sulphate solution
Q13 | Which of the following materials are usually most ductile?
  • Amorphous
  • Face centred cubic lattice
  • Non-metallic
  • Body centred lattice
  • Hexagonal close-packed lattice
Answer: Face centred cubic lattice
Q14 | In grey cast iron, free graphite is in the form of
  • Fine powder
  • Needles
  • Nodules
  • Crystals
  • Flakes
Answer: Flakes
Q15 | Volume of air required to melt one ton of cast iron in a cupola at N.T.P. is roughly
  • 10000 cubic metres of air
  • 10 cubic metres of air
  • 100000 cubic metres of air
  • 100 cubic metres of air
  • 1000 cubic metres of air
Answer: 100 cubic metres of air
Q16 | The property of a metal when the recovery after unloading is complete but not instantaneous is
  • 9
  • Viscoelasticity
  • Inelasticity
  • Anelasticity
  • creep
Answer: Anelasticity
Q17 | Standard electrical resistance are made of
  • Invar
  • Manganin
  • Tungsten
  • Phosphor bronze
  • Constantan
Answer: Constantan
Q18 | A chisel for cutting steel plates is usually
  • Hardened and tempered
  • Annealed
  • Hardened
  • Tempered
  • Tempered and annealed
Answer: Hardened and tempered
Q19 | Cracks of a vertical nature and dark coloured fissures in a sample of hardened steel indicate that
  • Steel has not been properly heated
  • Steel has been burned
  • Steel contains excessive alloying elements
  • Steel has been properly hardened
  • Steel has achieved maximum possible hardness in accordance with the carbon percentage
Answer: Steel has been burned
Q20 | Which of the following material is viscoelastic in properties?
  • Graphite
  • Rubber
  • Glass
  • Cork
  • None of the above
Answer: Rubber
Q21 | Brinell hardness of nitrided surface may be of the order of
  • More than 600
  • 200 to 250
  • 300 to 450
  • 150 to 200
  • 100
Answer: More than 600
Q22 | If a medium carbon hardened steel shows pearlite structure it may be concluded that
  • Steel contains impurities
  • Presence of cementite
  • Steel has been quenched in oil
  • Steel has been quenched in water
  • Steel has been slowly cooled in furnace
Answer: Steel has been slowly cooled in furnace
Q23 | Alpha brass is a (an)
  • Inermediate phase
  • Interstitial compound
  • Substitutional solid solution
  • None of the above
  • 2.10%
Answer: Substitutional solid solution
Q24 | Which of the following is a non-destructive test?
  • Tensile test
  • Cupping test
  • Charpy test
  • X-ray test
  • Izod Impact test
Answer: X-ray test
Q25 | For each ton of pig iron produced in blast furnace, the quantity of coke required would be roughly
  • 0.5 ton
  • 0.25 ton
  • 1.4 ton
  • 1.9 ton
  • 0.1 ton
Answer: 1.4 ton
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