8. The slump of a fresh concrete mix determines: (a) the likelihood of bleeding (b) the likelihood of segregation (c) the ease of placement (d) the amount of mixing water 9. Segregation occurs in: (a) very wet mixes (b) very dry mixes (c) mixes with a great amount of fine particles (d) none of the above 10. What type of cement is often used in a moderate sulphate environment? (a) Type10 or GU (b) Type 50 or HS (c) Type 30 or HE (d) Type 20 or MS (e) Type 40 or LH 11. The dynamic modulus of elasticity of concrete: (a) Is equal to the elastic modulus (b) Is higher than the elastic modulus (c) Is lower than the elastic modulus (d) Cannot be related to the elastic modulus 12. How can concrete be protected from frost damage? (a) By specifying a low w/c (b) By using durable aggregates (c) By using air entrainers (d) All of the above 13. What material is produced in a blast furnace? (a) Steel (b) Iron ore (c) Pig iron (d) Carbon steel (e) None of the above