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This set of Metallurgy Multiple Choice Questions & Answers (MCQs) focuses on Metallurgy Set 9
Q1 | In grey cast iron, carbon is present in the form of
- Cementite
- Flakes
- Powder
- Spheroids
- None of the above
Q2 | Which of the following affects the hardenability of steel?
- Austenitic composition
- Austenitic grain size
- Amount, nature and distribution of undissolved or insoluble particles in austenite
- All of the above
- Low specific heat of quenching oil
Q3 | Electric process for steel making is used in which of the following steel plant?
- Bhilai
- Bokaro
- Durgapur
- TISCO
- None of the above
Q4 | In a diamagnetic material the effect of an applied magnetic field is that
- A net dipole moment is induced in the material
- There is a net reduction in flux density
- The induced magnetism is in opposition to applied field
- All of the above
- None of the above
Q5 | In tool steel the percentage of silicon is usually restricted to
- 1 percent
- 2 percent
- 0.5 percent
- 0.2 percent
- 5 percent
Q6 | The highest rate of quenching is possible in
- Cold furnace
- Oil
- Air
- Water
- Hot furnace
Q7 | There are 14 atoms in a unit cell of
- Body centred cubic space lattice
- Face centred cubic space lattice
- Close packed hexagonal space lattice
- All of the above
- None of the above
Q8 | Coarse grained steels
- Are less tough
- Are less liable to distortion
- Have poor machinability
- Have leser depth hardening power
- None of the above
Q9 | Normal mercury thermometer can be used upto
- 300?C
- 500?C
- 100?C
- 800?C
- 212?C
Q10 | During heat treatment the formation of thick layer of scale on the surface of steel articles is mainly due to
- oxidation
- excessive hardness
- Low specific heat of quenching oil
- coarse grain structure
- reduction
Q11 | Ultimate tensile strength is least in case of
- Cast iron
- Mild steel
- Wrought iron
- High carbon steel
- Low carbon steel
Q12 | An instrument which is used for measuring temperature variations by change in a metallic resistance is called a
- thermo-generator
- Thermo-galvanometer
- Thennocouple
- Thermopile
- Bolometer
Q13 | White metal contains
- Mercury and zinc
- Copper, zinc and mercury
- Lead and copper
- Lead and bismuth
- Lead and zinc
Q14 | For acid resistance cast iron should have silicon percentage of
- 1 percent
- 15 percent
- 10 percent
- 25 percent
- 2 percent
Q15 | Which of the following gives granular fracture?
- Steel
- Wrought iron
- Cast iron
- All of the above
- None of the above
Q16 | The crystal structure of alpha iron is
- BCC
- FCC
- HCC
- Cubic
- None of the above
Q17 | Which of the following operation on grey cast iron will result in the production of white cast iron?
- Rapid heating
- Tumbling
- Tempering
- Shot peening
- Rapid cooling
Q18 | A solder consists of
- Tin and antimony
- Tin and white metal
- Lead and tin
- Zinc and lead
- Zinc and tin
Q19 | Ferrites are a sub-group of
- Ferromagnetic materials
- Ferrimagnetic materials
- Diamagnetic materials
- Paramagnetic materials
- None of the above
Q20 | Which of the following material is added to cast iron to obtain nodular cast iron?
- Chromium
- Copper
- Magnesium
- Manganese
- Molybdenum
Q21 | Pure iron has the structure of
- Ferrite
- Pearlite and austenite
- Pearlite
- Austenite
- Pearlite, austenite and ferrite
Q22 | A hardness value of 1400 BHN can be expected in case of
- Cementite
- Ferrite
- Pearlite
- All of the above
- None of the above
Q23 | During first charge in cupola the time taken by material to melt is approximately
- 2
- 5 to 6 hours
- 10 minutes
- 1 hour
- Half an hour
Q24 | Chromium percentage in cutlery stainless steel is
- 11 - 13 percent
- 18 - 20.5 percent
- 6 - 8 percent
- 15 - 18 percent
- 8 - 10 percent
Q25 | Percentage of carbon is least in case of
- Pig iron
- Wrought iron
- Malleable iron
- Cast iron
- Steel