### QUIZ CORNER: Why doesn’t ketchup flow out of an upside down container?

Ketchup is a non-Newtonian liquid that exhibits a high viscosity at rest that becomes lower when stressed for a time.

### Quiz Corner: How changes in pressure and temperature affect process gas

The pressure of a gas increased from 4 bar to 5 bar. Its temperature increased from 25 C to 55 C. Approximately how much was the gas compressed or expanded?

### QUIZ CORNER: How Much Pressure Can a 150 Lb. Flange Withstand?

Approximately how much pressure can a 150 lb. flange withstand?

A. 60 PSIG

B. 150 PSIG

C. 180 PSIG

D. 270 PSIG

### QUIZ CORNER: Which Is More Important for Flow Measurement — Repeatability or Accuracy?

Good measurement requires both repeatability and accuracy — but good accuracy generally means good repeatability.

### QUIZ CORNER: How to Calculate Orifice Plate Flow Rate

An orifice plate is designed to generate a differential pressure of 1,000 mm of water column at a full scale flow rate of 100 liters per minute.

### QUIZ CORNER: How Flow Turndown Affects Measurement Range

What is the additional measurement range in which a flowmeter can accurately measure flow if its turndown is improved from 50-to-1 to 100-to-1?

### QUIZ CORNER: Affinity Laws for Centrifugal Pump Loads

Using the Affinity Laws, what is the approximate flow and pressure generated when a variable speed drive operates the pump motor at 70 percent speed?

### QUIZ CORNER: Why Was a Control Valve Installed Upstream of a Flowmeter?

My initial gut reaction is that whoever designed the piping had little or no instrumentation background. Further, all of the instrumentation work performed in conjunction with the installation is suspect.

### QUIZ CORNER: Why Was the Flowmeter Installed in the Middle of Straight Run?

My initial gut reaction is that this piping installation was laid out by a piping designer with minimal or no input from an instrumentation engineer or instrument designer.

### QUIZ CORNER: Which Flowmeters Measure Inferentially?

Which of the following flowmeters infer the flow of fluid passing through the flowmeter? A. Coriolis mass; B. Magnetic; C. Orifice plate; D. Oscillating piston; E. Oval gear; F.  Thermal; G. Turbine; H. Venturi; I.  Vortex shedder …