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ABE 2 First Exam > Module 9: Sprayers > Flashcards

Module 9: Sprayers Flashcards

1
Q

application of chemicals to control weeds, pests and diseases

A

chemical control

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2
Q

most common method of controlling various pests and diseases in crop prod sys

A

chemical control

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3
Q

chemicals that are usually applied mechanical sprayers

A
  • herbicides
  • insecticides
  • fungicides
  • plant nutrients
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4
Q

basic functions of sprayer

A
  • break the liquid into droplets of effective size
  • distrib the spray solution uniformly
  • regulate the spraying rate

BDR

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5
Q

basic components of sprayer

A
  1. chem supply : tank
  2. energy sources : pump and pressure chamber
  3. atomizer : nozzles
  4. control device : cut-off valve
  5. conductors : flexible hose and rigid lance
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6
Q

hand operated sprayers

A
  • compression sprayer
  • knapsack sprayer
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7
Q

power operated sprayers

A
  • power knapsack
  • portable power
  • ultra low volume
  • agri robot power
  • self propelled
  • boom
  • tractor mounted
  • tractor trailer type
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8
Q

most popular way of applying chemicals is thru the use of what?

A

knapsack sprayer

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9
Q

pipe or tube of varying cross-sectional area and used to direct or modify the flow of fluids

A

sprayer nozzle

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10
Q

used to control the rate of flow, speed, direction, mass, shape, and/or the pressure of the stream that emerges from it

A

sprayer nozzle

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11
Q

main part of a sprayer that atomizes the liquid to fine particles by the application of high pressure

A

sprayer nozzle

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12
Q

2 classification of nozzle according to the number of nozzle HOLE

A
  1. single hole nozzle - one hole on a nozzle tip on top of a spray rod
  2. multi-hole nozzle - two or more holes on a nozzle tip on top of a spray rod
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13
Q

2 classification of nozzle according to the number of nozzle HEAD

A
  1. single head nozzle
  2. multi-head nozzle
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14
Q

3 classification of nozzle according to the nozzle SHAPE

A
  1. tip
  2. disc
  3. cap
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15
Q

2 classification of nozzle according to the spray pattern

A
  1. cone type
  2. fan type
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16
Q

2 classification of nozzle according to the spray pattern

best suited for spraying crops because it produces a spray in which droplets approach the leaves from several angles

A

cone type

17
Q

2 classification of nozzle according to the spray pattern

operates in high pressure and requires small orifice opening

A

cone type

18
Q

2 classification of nozzle according to the spray pattern

best suited for spraying flat surfaces as in the application of herbicides

A

fan type

19
Q

2 classification of nozzle according to the spray pattern

low pressure and requires large orifice opening

A

fan type

20
Q

the sprayer nozzle performance is dependent on?

A

hydraulic energy

21
Q

the higher the pressure, the ________ the droplets

A

smaller

22
Q

the higher the pressure, the _______ the flow rate

A

higher

23
Q

the higher the pressure, the wider the spray angle

true or false

A

true

24
Q

principle of creating hydraulic energy

A

pressure is created by adding air to a container with a fixed volume of liquid

air <——> liquid

25
Q

pressure is created by adding air to a container with a fixed volume of liquid

this principle is observed in??

A

compression sprayer

26
Q

pressure is created by adding liquid to a container with a fixed volume of air

A

knapsack sprayer

27
Q

sprayer calibration

for a given sprayer, the following factors should be determined

A
  1. nozzle discharge at different pumping rates (L/min)
  2. effective working width or swath (m)
  3. walking speed (m/min)
  4. application rate (L/ha)
28
Q

low-cost, hand-held device for chemical
application designed for controlled droplet application and electrostatic charging of spray liquid

A

electrostatic ultra-low volume-controlled
droplet application (ULV-CDA)

ABE 2 First Exam (11 decks)

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