Irrigation Systems Standards Quiz
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Questions and Answers

Which organization initiated the formulation of the national standard for pressurized irrigation systems?

  • Bureau of Agriculture and Fisheries Standards (BAFS)
  • Philippine Council for Agriculture, Aquaculture and Forestry and Natural Resources Research and Development (PCAARRD)
  • Agricultural Machinery Testing and Evaluation Center (AMTEC) (correct)
  • Bureau of Agricultural and Fisheries Engineering (BAFE)
  • What is the primary role of the Bureau of Agriculture and Fisheries Standards (BAFS) according to the provided text?

  • To endorse standards for approval by the DA Secretary
  • To test the quality of agricultural and fisheries products
  • To develop standard specifications and test procedures for agricultural machinery and equipment (correct)
  • To fund agricultural research and development projects
  • Which Republic Act is also known as the Agricultural and Fisheries Mechanization Law of 2013?

  • Republic Act 2013
  • Republic Act 10301
  • Republic Act 10602
  • Republic Act 10601 (correct)
  • Which of the following best describes the use of “shall” in the context of this standard?

    <p>It indicates mandatory requirements for conformity.</p> Signup and view all the answers

    According to the document, who is responsible for the approval of the standard?

    <p>The DA Secretary</p> Signup and view all the answers

    What is the system capacity, $Q$, calculated as?

    <p>$q \times N$</p> Signup and view all the answers

    What body is responsible for setting the rules for the structure and drafting of international standards?

    <p>Bureau of Philippine Standards (BPS)</p> Signup and view all the answers

    What does the term 'TDH' represent in the pump power calculation?

    <p>Total dynamic head</p> Signup and view all the answers

    What is the primary focus of the project that initiated this standard?

    <p>Enhancement of nutrient and water use efficiency through standardization of engineering support systems for precision farming</p> Signup and view all the answers

    What is crucial for the pump power requirement calculation?

    <p>The pump efficiency</p> Signup and view all the answers

    What does the word should indicate in the context of this document?

    <p>A recommended option among several possibilities.</p> Signup and view all the answers

    In designing a sprinkler system, which of these is included in the 'map of design'?

    <p>The system layout indicating mains and laterals</p> Signup and view all the answers

    What is a factor in determining the sprinkler type?

    <p>Jet trajectory and operating pressure</p> Signup and view all the answers

    What does the variable 'w' represent in the sprinkler application rate formula?

    <p>The portion of the circle receiving water (degrees)</p> Signup and view all the answers

    A sprinkler system has 100 sprinklers, each with a discharge of 0.05 m³/h. What is the total system capacity, Q?

    <p>5 m³/h</p> Signup and view all the answers

    What is the purpose for calculating the sprinkler’s application rate?

    <p>To not exceed the soil's infiltration rate.</p> Signup and view all the answers

    According to the sprinkler characteristics table, what is the approximate discharge of a sprinkler with nozzle diameters of 4.76 x 3.97 mm at a pressure of 345 kPa?

    <p>0.68 L/s</p> Signup and view all the answers

    Using the system capacity formula provided, if a system has 3 laterals operating at a time, with 10 sprinklers per lateral, and each sprinkler has a discharge of $0.00028 m^3/s$, what is the system capacity in m³/h?

    <p>30.24 m³/h</p> Signup and view all the answers

    What is the maximum allowed total pressure variation in the laterals, expressed as a percentage of the design pressure?

    <p>±10%</p> Signup and view all the answers

    What is the first component to consider when calculating Total Dynamic Head for a sprinkler system?

    <p>Sprinkler operating pressure</p> Signup and view all the answers

    What is a key consideration when selecting pipe sizes for mains and laterals, if the lateral runs up or downhill?

    <p>Adjusting the allowance for the difference in elevation when determining head variation.</p> Signup and view all the answers

    What should be considered when determining the friction loss in the main line?

    <p>The position of the lateral that gives the highest friction loss.</p> Signup and view all the answers

    What percentage of the sum of all standard heads is added to account for fittings in Total Dynamic Head calculation?

    <p>10%</p> Signup and view all the answers

    What is the maximum recommended velocity in the main line?

    <p>2 m/s</p> Signup and view all the answers

    Which element is NOT directly a component of Total Dynamic Head but is considered in system design?

    <p>Pump efficiency</p> Signup and view all the answers

    In the pump power requirement equation, what does 'Q' represent?

    <p>System capacity</p> Signup and view all the answers

    What is the maximum allowable friction loss in the laterals, expressed as a percentage of the average pressure?

    <p>20%</p> Signup and view all the answers

    What is the approximate wetted diameter of a sprinkler with a nozzle size of 6.35 x 3.97 mm at a pressure of 276 kPa?

    <p>31 m</p> Signup and view all the answers

    What is the purpose of the 'Map of Design', according to the content?

    <p>To indicate the position of mains, laterals, and flow direction</p> Signup and view all the answers

    According to the content, what should be considered when sizing components like fittings and pipes?

    <p>Parameters computed during the system design</p> Signup and view all the answers

    According to the provided text, what is NOT a required component to be sized or selected based on system design?

    <p>Ground anchors for the pump</p> Signup and view all the answers

    What is the purpose of the 'shed for the power components' mentioned in the text?

    <p>To protect the power components from the elements</p> Signup and view all the answers

    What is a key disadvantage of plastic pipes in comparison to steel threaded pipes?

    <p>They suffer from continuous creep strength issues.</p> Signup and view all the answers

    In what length are steel threaded pipes typically supplied?

    <p>Random lengths of 6 m</p> Signup and view all the answers

    What is the typical lifespan of welded hot-dip galvanized steel pipes when buried in soil?

    <p>Between 10-15 years</p> Signup and view all the answers

    What is a key advantage of quick coupling light steel pipes?

    <p>They are lightweight and easy to install or remove.</p> Signup and view all the answers

    What is the typical working pressure range (PN) of quick coupling light steel pipes?

    <p>12.0 to 20.0 bars</p> Signup and view all the answers

    What is the primary use of quick coupling aluminum pipes in sprinkler irrigation setups?

    <p>Moveable lateral lines above ground</p> Signup and view all the answers

    How do quick coupling aluminum pipes compare in weight to the light steel pipes?

    <p>About half the weight</p> Signup and view all the answers

    What are the common nominal diameter sizes (DN) available for quick coupling light steel pipes?

    <p>70, 76 and 89 mm</p> Signup and view all the answers

    What is the total irrigation time in hours if a single lateral is used per set, given a set time of 3.93 hours, 42 sets, and a move time of 1 hour?

    <p>207</p> Signup and view all the answers

    If two laterals are used per set, and the irrigation time per day is 17.8 hours with 21 total sets, approximately how many days of irrigation are required?

    <p>7</p> Signup and view all the answers

    What is the system capacity, given 2 center pivots (Nc), 16 sections per center pivot (Ns), and a sprinkler flow rate of 3.24 m³/hr (q)?

    <p>103.68 m³/hr</p> Signup and view all the answers

    Given a lateral length of 195 m, a Hazen-Williams coefficient (C) of 120, and the specified pipe dimensions, what is the total friction loss (Hf) before adjustment?

    <p>9.37 m</p> Signup and view all the answers

    What is the average pressure head (Ha) given a design pressure (Hd) of 9.81 m, a friction loss (hf) of 3.56 m, and a lateral length of 195 m?

    <p>29.1 m</p> Signup and view all the answers

    Study Notes

    Philippine National Standard for Design of a Pressurized Irrigation System – Part A: Sprinkler Irrigation

    • This standard outlines minimum requirements, criteria, and procedures for designing sprinkler irrigation systems, both periodic-move and continuous-move types.
    • The standard references other relevant documents, including PNS/BAFS/PAES 217:2017, for irrigation water requirements.
    • Key terms include average pressure, design pressure, distribution uniformity, irrigation period, and sprinkler irrigation.
    • Sprinkler spacing is a crucial design factor, with guidelines provided for various wind speeds (e.g., up to 10 km/hr, 10-15 km/hr, above 15 km/hr).
    • The recommended spacing is a percentage of the wetted diameter.
    • Sprinkler systems (set systems, periodic-move systems, and continuous-move systems) are detailed with various operating principles (hand-move systems, side-roll systems, end-tow systems, centre-pivot systems, and linear-move systems).
    • Materials for mainlines, submainlines, and laterals are covered in annex B.
    • Several design criteria are presented that account for various factors like crop types, soil types, and irrigation water sources, and the recommended standards to adhere to.
    • Data Requirements are detailed including topographic map specifications, land features, water resources data, and soil characteristics.
    • Final design procedures are provided encompassing sprinkler spacing, system capacity, pipe size selection, total dynamic head, pump and power selection, etc.
    • Formulas for various calculations are detailed to support design considerations such as net depth of water application (dnet), irrigation frequency (If), gross depth of water application (dgross) and preliminary system capacity (Qprelim).
    • Annexes provide additional information on sprinkler types, recommended materials, and specific computations crucial for sprinkler system design.

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    Description

    Test your knowledge on the national standards for pressurized irrigation systems. This quiz covers key organizations, regulations, and technical terms related to agricultural mechanization. Assess your understanding of the Agricultural and Fisheries Mechanization Law and its implications for irrigation design.

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