🔍 Key Concepts

• Look at the central cup with a small orifice at the bottom draining into the 60 cc beaker – what kind of property is commonly measured by timing how long a fixed volume takes to flow out? • Notice the constant-temperature bath around the center device and the thermometers/temperature coils – which type of test must tightly control temperature: viscosity, flow rate in a pipe, vapor pressure, or flash point? • Think about which of the options is normally associated with a calibrated cup and timed discharge rather than a closed pressure vessel or a flash point tester.

💭 Think About

• Ask yourself: Is this setup designed to measure pressure, flash point, or the time for a liquid to drain through a small opening? • Compare the illustration to what you would expect for a Reid vapor pressure analyzer or a Pensky-Martens cup – would those usually be open to a beaker like this or more like a sealed or lidded vessel? • Which instrument from the choices is most closely linked to controlling bath temperature and measuring a timed outflow volume (60 cc)?

✅ Before You Answer

• Verify which instrument is used to measure viscosity by timing the outflow of a fixed volume of liquid from a calibrated cup. • Check whether a Reid vapor pressure analyzer or Pensky-Martens cup would normally discharge into an open 60 cc beaker like the illustration shows. • Confirm that a true flow meter is usually installed in-line in piping to monitor system flow, not in a bench-top bath with a small calibrated cup like this.