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    CIV 2213 - Fluid Mechanics II At-Home Test No. 1 Date & Start Time: Time Allowed

    Uploaded by

    shan singh
    This document provides instructions and questions for an at-home test in Fluid Mechanics II being administered by the University of Guyana's Department of Civil Engineering. The test contains 8 questions and is to be completed individually within 1 hour. Students are to show their work and submit their responses in PDF format through Moodle by the deadline. Late submissions will be penalized.

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    CIV 2213 - Fluid Mechanics II At-Home Test No. 1 Date & Start Time: Time Allowed

    Uploaded by

    shan singh
    160 views3 pages
    This document provides instructions and questions for an at-home test in Fluid Mechanics II being administered by the University of Guyana's Department of Civil Engineering. The test contains 8 questions and is to be completed individually within 1 hour. Students are to show their work and submit their responses in PDF format through Moodle by the deadline. Late submissions will be penalized.

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    2213 civ

    Original Title

    CIV 2213_AHT 1_2021_Rev

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    This document provides instructions and questions for an at-home test in Fluid Mechanics II being administered by the University of Guyana's Department of Civil Engineering. The test contains 8 questions and is to be completed individually within 1 hour. Students are to show their work and submit their responses in PDF format through Moodle by the deadline. Late submissions will be penalized.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    160 views3 pages

    CIV 2213 - Fluid Mechanics II At-Home Test No. 1 Date & Start Time: Time Allowed

    Uploaded by

    shan singh
    This document provides instructions and questions for an at-home test in Fluid Mechanics II being administered by the University of Guyana's Department of Civil Engineering. The test contains 8 questions and is to be completed individually within 1 hour. Students are to show their work and submit their responses in PDF format through Moodle by the deadline. Late submissions will be penalized.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 3

    University of Guyana

    Faculty of Engineering & Technology


    Department of Civil Engineering
    Semester II: 2020 – 2021

    CIV 2213 – Fluid Mechanics II

    At-Home Test No. 1

    Date & Start Time: May 20, 2021 (11:15 am.)

    Time Allowed: 1 Hour

    Instructions & Information:

    1. This is an individual assessment, work independently.

    2. Any indication of plagiarism will be dealt with on a case by case basis and consequent grading

    will be done at the Instructor’s discretion.

    3. THREE (3) pages and EIGHT (8) questions constitute a complete question paper. You are

    responsible for checking that your question paper is complete.

    4. You are required to answer ALL questions.

    5. A 10% per hour penalty will be applied to late submissions.

    6. Submissions must be handwritten in a clear, coherent and concise manner. However, you

    are required to submit in PDF format.

    7. The submission must be made via Moodle. Any submission made via email will NOT be

    graded.

    8. If doubt exists as to the interpretation of any question, a clear statement must be provided

    upon which assumptions are made.

    9. In calculations, show all steps clearly in your working. Partial credit is available for each

    question.

    10. The initial submission of the test will take precedence.

    11. The use of an electronic calculator (non-programmable) is permitted.

    Page 1 of 3
    Questions:

    1. Water flows through a pipe 25 mm in diameter at a velocity of 6 m/s. Determine whether

    the flow will be laminar or turbulent assuming that the dynamic viscosity of water is taken as

    1.30 × 10−3 kg/ms and its mass density as 1000 kg/m3 . If oil of specific gravity 0.9 and

    dynamic viscosity 9.6 × 10−2 kg/ms is pumped through the same pipe, what type of flow will

    occur? [5 Marks]

    2. A patient recovering from surgery is being given fluid intravenously. The fluid has a density of

    1030 kg/m3 , and 9.5 × 10−4 m3 of it flows into the patient every six hours. Find the mass

    flow rate. [4 Marks]

    3. In your kitchen, the sink is 2 ft × 18 in.× 12 in. deep. You are filling it with water at the rate

    of 4 gpm. How long will it take (in min) to half fill the sink? [4 Marks]

    4. The ventilating fan of the bathroom of a building has a volume flow rate of 30 L/s and runs

    continuously. If the density of air inside is 1.20 kg/m3 , determine the mass of air vented out

    in one day. [4 Marks]

    5. A garden hose attached with a nozzle is used to fill a 20 gal. bucket. The inner diameter of

    the hose is 1 in and it reduces to 0.5 in at the nozzle exit. If the average velocity in the hose

    is 8 ft/s, determine:

    a) The volume and mass flow rates of water through the hose,

    b) How long it will take to fill the bucket with water, and

    c) The average velocity of water at the nozzle exit.

    [8 Marks]

    Page 2 of 3
    6. The aorta carries blood away from the heart at a speed of about 40 cm/s and has a radius of

    approximately 1.1 cm. The aorta branches eventually into a large number of tiny capillaries

    that distribute the blood to the various body organs. In a capillary, the blood speed is

    approximately 0.07 cm/s, and the radius is about 6 × 10−4 cm. Treat the blood as an

    incompressible fluid, and use these data to determine the approximate number of capillaries

    in the human body. [5 Marks]

    7. A rice farmer needs to fill her 150 m × 400 m field with water to a depth of 7.5 cm in 1 hr.

    How many 37.5 cm diameter supply pipes are needed if the average velocity in each must be

    less than 2.5 m/s? [5 Marks]

    8. A room has a volume of 120 𝑚3 . An air-conditioning system is to replace the air in this room

    every twenty minutes, using ducts that have a square cross section. Assuming that air can be

    treated as an incompressible fluid, find the length of a side of the square if the air speed within

    the ducts is:

    a) 3.0 m/s and

    b) 5.0 m/s.

    [5 Marks]

    Page 3 of 3

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