04-BS-11
Worked solutions to 14 past sittings (2013–2019), 102 questions. Pick a sitting, or start from a topic below.
- December 2019
- December 2018
- May 2018
- December 2017
- May 2017
- December 2016
- May 2016
- December 2015
- May 2015
- December 2014
- May 2014
- December 2013
- May 2013
- Undated paper
Topics across the sittings
Topics that come up in more than one sitting, taken from the headings of our worked solutions. A topic counts once per sitting.
- Density (9 sittings): December 2019 Q1 · December 2018 Q1 · May 2018 Q1 · December 2017 Q1 · May 2017 Q2 · December 2016 Q1 · December 2014 Q1 · May 2014 Q3 · May 2013 Q2
- ASTM Grain Size (3 sittings): May 2017 Q5 · December 2015 Q2 · May 2013 Q7
- Atomic Radius (3 sittings): December 2014 Q1 · December 2013 Q2 · Undated paper Q1
- Diffusion (3 sittings): May 2017 Q3 · May 2016 Q5 · May 2013 Q3
- Full Tensile-Test Workup (3 sittings): May 2016 Q1 · December 2015 Q3 · December 2014 Q2
- Annealing (2 sittings): May 2018 Q3 · May 2014 Q2
- ASTM Grain Size Number (2 sittings): May 2018 Q6 · Undated paper Q3
- BCC Molybdenum (2 sittings): December 2014 Q1 · Undated paper Q1
- Be–Si Eutectic System (2 sittings): December 2016 Q3 · December 2013 Q3
- Borosilicate Glass Design (2 sittings): May 2018 Q7 · May 2014 Q8
- CaO Coordination Number (2 sittings): December 2018 Q5 · May 2014 Q7
- Cold Work (2 sittings): May 2018 Q3 · May 2014 Q2
- Concrete Curing (2 sittings): December 2016 Q7 · May 2013 Q8
- Copper Half-Cell Potential (2 sittings): December 2016 Q5 · May 2013 Q5
- Crystallinity (2 sittings): May 2018 Q2 · May 2014 Q4
Questions by sitting
December 2019
- Question 1: Miller Indices from a Unit-Cell Sketch; FCC Rhodium Lattice Constant and Density
- Question 2: Tensile Test — Yield Strength, Tensile Strength, Modulus, %RA, %EL
- Question 3: Mass Loss on Heating a Sand–Sodium-Metasilicate Brick; Brick Manufacturing
- Question 4: Primary Bonding in Solids; Materials Selection for an Aircraft Wing
- Question 5: TTT Diagram Reading for 1035 Steel; Maximum Crack Size in a Pressure Vessel
- Question 6: Polyacrylonitrile Molecular Weight Averages; Stress-Relaxation Life of a Fastener
- Question 7: Corrosion — True/False Analysis, Galvanized Steel, and Weld Decay in Stainless Steel
December 2018
- Question 1: BCC Vanadium Lattice Constant and Density; Grain-Boundary Types
- Question 2: PVC–PE Copolymer, Plastic Processing Methods, and Chloroprene Rubber Crosslinking
- Question 3: Tensile Test of a Magnesium-Alloy Bar — Full Mechanical-Property Workup
- Question 4: Heat-Treated Microstructures in 0.45%C Steel; Season Cracking and Dezincification in Brass; Weld Decay
- Question 5: CaO Coordination Number; Porosity/Grain Size in Ceramics; Weibull Statistics
- Question 6: NDT for Welded Pipe Cracks; Headlight Filament Forensics; Worn Carburized Gear
- Question 7: Reading the Diffusivity–Temperature Chart; Phosphorus Diffusion into a Silicon Wafer
May 2018
- Question 1: Silver Crystal Structure, Density, and Planar Packing
- Question 2: Polymer Molecular Weight, Crystallinity, and Thermoplastic vs. Thermoset Processing
- Question 3: Cold Work and Annealing — Hardness Response of Brass
- Question 4: Galvanic Concentration Cell and Carbon Diffusion in Steel
- Question 5: Fiber-Reinforced Composite Load Sharing and Minimum Radius Ratio for CN 4
- Question 6: ASTM Grain Size Number and Hall–Petch Yield Strength
- Question 7: Borosilicate Glass Design and Cermets
December 2017
- Question 1: FeO Rock-Salt Structure, Packing Factor, Density, and Wustite Semiconductivity
- Question 2: Activation Energy for Interstitial Diffusion from Two Temperatures
- Question 3: Melt Index and Molecular Weight; PTFE Degree of Polymerization
- Question 4: Tensile Test of 7075-T5 Aluminum Alloy — Full Property Workup
- Question 5: 1080 Steel Heat-Treatment True/False; Weld Decay in 304 Stainless Piping
- Question 6: Pb–Sn Lever Rule; Coherent Precipitates; Age-Hardening Alloy Selection
- Question 7: Solidification Defects; Chvorinov's Rule for a Bronze Casting
May 2017
- Question 1: Schmid’s Law; Loading of a Nickel Wire
- Question 2: Cesium Chloride — Structure, Density, and X-ray Verification
- Question 3: Diffusion — Units of $D$ and a Ceramic Barrier Lifetime
- Question 4: Molecular Weights of a Polypropylene Sample
- Question 5: ASTM Grain Size; Strain Hardening and Annealing of Aluminum
- Question 6: Heat Treatment of a 0.45% Carbon Steel; Jominy Test; Casting Porosity
- Question 7: Ceramics, Glasses, and Composites
December 2016
- Question 1: BCC Chromium — Density, Unit-Cell Sketch, Interplanar Spacing
- Question 2: Bridge-Cable Wire Count; Measuring Yield Strength and Poisson’s Ratio
- Question 3: Be–Si Eutectic System — Diagram and Solidification Paths
- Question 4: Stress Relaxation of a Nylon Band; Load Sharing in a Glass/Nylon Composite
- Question 5: Copper Half-Cell Potential; Electroplating Current and Time
- Question 6: Centre-Cracked Panel — Critical Crack Length and Fatigue Life
- Question 7: Concrete Curing; Identifying an Unknown Hardenability Lot
May 2016
- Question 1: Full Tensile-Test Workup, Aluminum Alloy Bar
- Question 2: Modulus of Semicrystalline Nylon; Porosity of an Oil-Impregnated Bearing
- Question 3: Critical Radius Ratio for 4-Fold Coordination; FCC Lead Lattice Constant and Atomic Densities
- Question 4: Pb-Sn Eutectic Phase Diagram — Lever-Rule Analysis of a 30% Sn and an 80% Sn Alloy
- Question 5: Carbon Diffusion Flux in FCC Iron; Creep and Diffusion
- Question 6: Corrosion-Rate Reasoning; Weld Sensitization; Concentration Cells
- Question 7: 1080 Steel Misconceptions; X-ray Inspection Limits; Fracture Diagnosis; Age-Hardened Rivet Design
December 2015
- Question 1: Cold-Drawn Copper Wire Design; Dislocations in Cold Rolling
- Question 2: Substitutional Solid Solutions; ASTM Grain Size; Fatigue Failure
- Question 3: Full Tensile-Test Workup
- Question 4: Ti BCC→HCP Volume Change; the Charpy Impact Test
- Question 5: TTT Diagram Reading & Isothermal Anneal Design; Critical Crack Size
- Question 6: Polyacrylonitrile Molecular Weight & Degree of Polymerization
- Question 7: Corrosion Statements; Galvanized Steel; Weld-Zone Attack on Stainless Steel
- Question 8: Al-Si Casting Alloy Phase Diagram; Polymer Modulus vs. Temperature
May 2015
- Question 1: Miller Indices of Planes A & B; FCC Rhodium Density
- Question 2: True Strain Derivations & the Brinell Hardness Test
- Question 3: Brick Mass Loss on Dehydration; How Bricks Are Made
- Question 4: Ethylene–Propylene Copolymer Molecular Weight; Fastener Stress Relaxation Life
- Question 5: Reading the Diffusivity Chart; Phosphorus Diffusion Flux in Silicon
- Question 6: The Jominy Test; Isothermal Heat Treatments of Eutectoid Steel
- Question 7: NDT for Subsurface Weld Cracks; Headlight Filament Forensics; Toughening Ceramics
December 2014
- Question 1: BCC Molybdenum — Atomic Radius, Density, and Plane Spacing
- Question 2: 7075-T5 Aluminum — Full Tensile-Test Workup
- Question 3: Pb–Sn Lever Rule; Precipitate Coherency; Age-Hardening Candidates
- Question 4: PVC/PE Copolymer; Polymer Processing; Rubber Vulcanization
- Question 5: 1080 Steel Statements; Weld Decay in 304 Stainless Steel
- Question 6: Glass-Fibre Load Sharing in Nylon; Minimum Radius Ratio for CN=4
- Question 7: Casting Solidification Defects; Chvorinov's Rule
May 2014
- Question 1: Magnesium-Alloy Tensile Test — Full Stress–Strain Analysis
- Question 2: Cold-Worked Brass — Hardness vs. Cold Work and Annealing
- Question 3: BCC Vanadium — Lattice Constant and Density; Diffusion Factors
- Question 4: Thermoplastic Molecular Mass and Crystallinity
- Question 5: Cu Concentration Cell and Carbon Diffusion in FCC Iron
- Question 6: Heat Treatments for 0.45% C Steel; Brass and Stainless-Steel Corrosion
- Question 7: CaO Coordination Number; Porosity, Grain Size, and Weibull Statistics in Ceramics
- Question 8: Wood–Resin Composite; Borosilicate Glass Design; Sledgehammer Materials Selection
December 2013
- Question 1: Schmid's Law and a Nickel Wire Under Load
- Question 2: Silver — FCC Density, Atomic Radius, and Planar Packing
- Question 3: Be–Si Eutectic System — Solidification and Eutectic Fraction
- Question 4: Diffusion Activation Energy from Two Temperatures
- Question 5: Melt Index and PTFE Chain Statistics
- Question 6: Center-Cracked Panel — Fracture and Fatigue Life
- Question 7: Ceramic Strength, Glass Network Modifiers, and Composite Design
- Question 8: Heat Treatment of a 0.35%C Steel; Austempering; 2024 Aluminum Tempers
May 2013
- Question 1: Suspension Cable — Wire Count and Materials Testing
- Question 2: CsCl Crystal Structure, Lattice Constant, and Density
- Question 3: Diffusion — Units of D and an MgO Diffusion-Barrier Lifetime
- Question 4: Nylon Band Stress Relaxation and Glass/Nylon Composite Load Sharing
- Question 5: Copper Half-Cell Potential and Electroplating
- Question 6: Polypropylene Molecular Weight Averages and Degree of Polymerization
- Question 7: ASTM Grain Size and the Effects of Cold Work and Low-Temperature Annealing
- Question 8: Concrete Curing and Steel Hardenability/Jominy Correlation
Undated paper
- Question 1: BCC Molybdenum — Atomic Radius, Unit-Cell Sketch, Plane and Direction, Interplanar Spacing
- Question 2: True Strain from Gauge Length and Diameter; Validity During Necking; Brinell Hardness
- Question 3: Substitutional Solid Solutions; ASTM Grain Size Number; Recognising Fatigue Failure
- Question 4: Al–Si Casting Alloy — Solidification Range, Microstructure, Eutectic Fraction, Castability
- Question 5: Copper Wire Drawing — Penultimate Die Diameter for a Strength + Ductility Spec; Dislocations in Cold Rolling
- Question 6: Copolymer Molecular Weight; Modulus–Temperature Behaviour of Amorphous and Semicrystalline Polymers
- Question 7: Jominy Hardenability Test; Interpreting Four Heat Treatments on the TTT Diagram; Cryogenic Treatment