11Segregation in concrete means:AMixing of ingredientsBSeparation of coarse aggregate from the mortarCSetting of cementDCuringView AnswerDiscussWorkspaceReportSaveEasy
12The slump test measures concrete's:ACompressive strengthBSetting timeCDurabilityDWorkabilityView AnswerDiscussWorkspaceReportSaveEasy
13For a concrete mix with 400 kg of cement and a water–cement ratio of 0.45, the water required is:A400 kgB180 kgC220 kgD45 kgView AnswerDiscussWorkspaceReportSaveMedium
14Increasing the water–cement ratio generally:AIncreases durabilityBIncreases strengthCHas no effectDReduces strengthView AnswerDiscussWorkspaceReportSaveEasy
15Plasticisers are added to concrete to:AAdd colourBSpeed up settingCIncrease weightDImprove workability without adding waterView AnswerDiscussWorkspaceReportSaveEasy