Which of the following is false about a compensated Thorpe tube?
a. Variable-orifice, constant-pressure flow-meter device
b. Calibrated in liters per minute at atmos-pheric pressure
c. Flow-control needle valve placed distal to the flow tube
d. Accuracy unaffected by changes in downstream resistance
ANS: B
The scale of the compensated Thorpe tube flowmeter is calibrated at 50 psig instead of at at-mospheric pressure.
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