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ire the flow of w ombone cooler under conditions such that the Francis formula, q C(L -0.2H)

ire the flow of w ombone cooler under conditions such that the Francis formula, q C(L -0.2H)

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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2-4. A sharp-edged rectangular weir was used to measure the flow of water from a trombone cooler under conditions such that the Francis formula, q = C(L - 0.2H)1 %3D may be applied. cent. The value of L was 8.0 in. with an estimated precision of +0.1 in. H was measured to be 4.0 in., but because of turbulence the precision of this measurement was estimated to be only +0.4 in. (a) What is the "maximum possible systematic error" in the calculated value of q? (b) What is the probable precision of the calculated value of q? (c) Express the calculated value of q in the proper and accepted form. (d) If the weir is to be calibrated at these conditions by collecting and weighing the water which flows over the weir in a period of approximately min, with what precision should the individual measurements be made if the desired precision of q is +0.5 per cent? For q in cubic feet per second and L and H in feet, C 3.33 3 per
Transcribed Image Text:2-4. A sharp-edged rectangular weir was used to measure the flow of water from a trombone cooler under conditions such that the Francis formula, q = C(L - 0.2H)1 %3D may be applied. cent. The value of L was 8.0 in. with an estimated precision of +0.1 in. H was measured to be 4.0 in., but because of turbulence the precision of this measurement was estimated to be only +0.4 in. (a) What is the "maximum possible systematic error" in the calculated value of q? (b) What is the probable precision of the calculated value of q? (c) Express the calculated value of q in the proper and accepted form. (d) If the weir is to be calibrated at these conditions by collecting and weighing the water which flows over the weir in a period of approximately min, with what precision should the individual measurements be made if the desired precision of q is +0.5 per cent? For q in cubic feet per second and L and H in feet, C 3.33 3 per
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