Question

Diggy
A farmer's irrigation system has plastic and metal pipes. He built it with a total of 4,271
pipes. If he used 1,753 plastic pipes, how many metal pipes did be use​

Answer 1

Answer:

INTRODUCTION

Irrigation system installations consist of various pipes, fittings, valves and

other equipment depending on the kind of system and the type of

installation. Most installations have the same structure, and thus a relatively

small range of equipment can meet the requirements of a whole region.

Irrigation equipment can be divided into:

• pipes;

• pipe connector fittings;

• flow control devices;

• filters;

• fertigation equipment;

• water emitters;

• automation equipment;

• operation equipment;

• water-lifting devices.

The main characteristics of the irrigation equipment are:

• material, e.g. galvanized steel, rigid PVC, etc.;

• size, i.e. the nominal diameter (DN) of the ISO metric range in

millimetres (16–160 mm) and/or of the BSP threaded range in inches

( –4 inches);

• type of joint, e.g. threaded, quick coupling, solvent welded, etc.;

• working pressure PN (nominal pressure) or PR (pressure rating) in

bars, e.g. 6.0 bars;

• national and/or international standards conformed to, e.g. DIN, ISO,

BS, ASTM, EN.

The working pressure of a pipe or a fitting is the maximum internal

water pressure to which the pipe or the fitting is subjected continuously in

ordinary use, with certainty that failure of the pipe will not occur. It is

specified as nominal pressure (PN) or pressure rating (PR).