1 An undersized drain would experience what symptoms a It would carry too little drainage so there would be a lack of scrubbing b It may become air locked and impede the flow of discharge c Leftover solids may lead to a blockage d Higher velocity of flow 2 Fixture Units are based on what three factors 3 The minimum size of any regular WC fixture drain is a 2 b 3 c 4 d 4 A 3 horizontal branch can carry a maximum of how many WCs a 1 b 2 c 3 d 4 5 A 3 soil stack can carry a maximum of how many WCs a 2 b 3 c 4 PE glead me