Q1) Air flows at 20°C through a 6cm pipe. A square-edged orifice plate with the diameter ratio, β=0.4 is choosen to meter the flow rate. A pressure drop of 250cm H2O is measured at the flange taps with an upstream pressure of 93.7 kPa absolute. Take discharge coefficient C , as 0.60±1.0% . Assume that dimensions are known to within 0.025mm, the systematic uncertainty in pressure is 0.25cm H2O and the pressure drop shows a standard deviation of 0.5cm in 20 readings. Upstream pressure is constant. In the flow measurement, determine the followings; a) The flow rate.
Q1) Air flows at 20°C through a 6cm pipe. A square-edged orifice plate with the diameter ratio, β=0.4 is choosen to meter the flow rate. A pressure drop of 250cm H2O is measured at the flange taps with an upstream pressure of 93.7 kPa absolute. Take discharge coefficient C , as 0.60±1.0% . Assume that dimensions are known to within 0.025mm, the systematic uncertainty in pressure is 0.25cm H2O and the pressure drop shows a standard deviation of 0.5cm in 20 readings. Upstream pressure is constant. In the flow measurement, determine the followings; a) The flow rate.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Q1) Air flows at 20°C through a 6cm pipe. A square-edged orifice plate with the diameter ratio, β=0.4 is choosen to meter the flow rate.
A pressure drop of 250cm H2O is measured at the flange taps with an upstream pressure of 93.7 kPa absolute. Take discharge coefficient C , as
0.60±1.0% . Assume that dimensions are known to within 0.025mm, the systematic uncertainty in pressure is 0.25cm H2O and the pressure drop shows a standard deviation
of 0.5cm in 20 readings. Upstream pressure is constant. In the flow measurement, determine the followings;
a) The flow rate.
b) The systematic uncertainty
c) The random uncertainty
d) The total uncertainty
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