Skip to content

Course home

Question bank·6.1 Improving processes and products
Sign up

6.1 Improving processes and products

EasyMediumHard
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374
Question 18

A company makes inspection rods for use inside damp drainage pipes. Each rod contains 240 cm3 of material.

The material must:

  • have a tensile strength of at least 280 MPa
  • produce a rod with a mass no greater than 0.50 kg
  • not corrode in wet conditions
  • have the lowest possible material cost.
MaterialTensile strength (MPa\mathrm{MPa}MPa)Density (g/cm3\mathrm{g/cm^3}g/cm3)Corrodes in wet conditions?Cost per kg (£)
Fibreglass3001.9no4.50
Carbon-fibre composite6201.6no24.00
Low-carbon steel3507.8yes0.95
Poly(ethene)300.95no1.30

Which material should the company use?

Use the data and calculations to justify your answer.

[4]
Markscheme

6.1 Improving processes and products Questions

  1. GCSE
  2. /Chemistry
  3. /6.1 Improving processes and products

136 exam-style questions on OCR GCSE Chemistry 6.1 Improving processes and products, covering 6.1.1 Extracting metals industrially and by electrolysis, 6.1.2 Life cycle assessment and recycling, 6.1.3 Biological methods of metal extraction, 6.1.4 The Haber process and the production of fertilisers, 6.1.5 Alloys and their uses, 6.1.6 Corrosion and its prevention, 6.1.7 Comparing and selecting materials, and 6.1.8 Industrial conditions, rate and position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.

More questions