1Air-entraining agents improve concrete's:ACompressive strengthBResistance to freeze–thaw damageCWeightDColourView AnswerDiscussWorkspaceReportSaveEasy
2Ready-mix concrete (RMC) is:ADry cement bagsBConcrete mixed by hand on siteCPrecast blocksDConcrete batched at a plant and delivered to siteView AnswerDiscussWorkspaceReportSaveEasy
3M20 concrete has a characteristic compressive strength of:A20 N/mm² at 7 daysB200 N/mm²C20 N/mm² at 28 daysD2 N/mm²View AnswerDiscussWorkspaceReportSaveEasy
4The slump test measures concrete's:AWorkabilityBCompressive strengthCSetting timeDDurabilityView AnswerDiscussWorkspaceReportSaveEasy
5Bleeding in concrete is:AColour changeBCracks formingCWater rising to the surface after placingDLoss of cementView AnswerDiscussWorkspaceReportSaveEasy