11The effectiveness–NTU method is useful when:AThere is no flowBAll temperatures are knownCOnly radiation occursDOutlet temperatures are unknownView AnswerDiscussWorkspaceReportSaveEasy
13Fouling in heat exchangers:AIncreases heat transferBReduces pressure dropCHas no effectDReduces the overall heat-transfer coefficientView AnswerDiscussWorkspaceReportSaveEasy
14The Grashof number is important in:AForced convection onlyBConductionCRadiationDNatural (free) convectionView AnswerDiscussWorkspaceReportSaveEasy
15The Prandtl number is the ratio of:ABuoyancy to viscous forcesBConvective to conductive heat transferCMomentum diffusivity to thermal diffusivityDInertial to viscous forcesView AnswerDiscussWorkspaceReportSaveEasy