A sharp-crested rectangular weir of length Steve Gibbs @The Saylor

Question 22 / 33: A sharp-crested, rectangular weir of length 18 ft and height of 1 ft exhibits a head of 3 inches of water. Calculate the water flow in ft³/s and assume that the head of velocity approach is small.

A 0.75 ft3/s

B 0.75 ft3/min

C 7.5 m3/hr

D 0.075 ft3/s

E 0.75 gal/min

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Explanation:

This is the type of engineering calculation for which you are not expected to remember the formula. If you work with weirs everyday, you may learn to remember the formula. For this calculation, we simply refer to the Civil Engineering Portal resource on "Weirs" listed in section 2.3.1.and apply the appropriate formula, Q=0.333*(b -nh)*[(h+h₀)^(3/2)-h₀^(3/2)].

Quiz Home Page

https://www.jobilize.com/thermal-fluid-systems-mcq-quiz-by-dr-steve-gibbs

Thermal-Fluid Systems ME303

Author:

Dr.Steve GibbsProfessor

The Saylor Foundation

USA

Access: Public Instant Grading

Attribution: Dr. Steve Gibbs. Thermal-Fluid Systems. The Saylor Academy 2014, http://www.saylor.org/courses/me303/

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