Rotameters: (A) Depend on laminar low for their accuracy, (B) Will only function when upright, (C) Are constant pressure drop-constant orifice devices, (D) Are not accurate below 1L/min
Answer is B. Rotameters are constant pressure drop-variable orifice devices. They are accurate at values as low as 200mL/min both laminar and turbulent flow determine their accuracy .