Pesticides

Question 1

Most spray drifts consist of droplets having.

Answer 1

Diameters less than 200 microns

Question 2

The fall rate of a spray droplet is roughly to the (_________) of the droplets diameter.

Answer 2

Square

Question 3

In general, as air temperature increases the potential for spray drift also

Answer 3

Increases

Question 4

For any given set of Nozzles, increasing pump pressure will;

Answer 4

Increase spray drift potential

Question 5

Assuming all other spray systems variables, pump pressures, spray mix velocity are kept constant, the nozzle tip orifice diameter increases, the percentages of spray volume composed of small droplets

Answer 5

decrease

Question 6

A good ag pilot should be prepared to refuse for spray service at a particular time if he thinks it is a safety hazard, etc

Answer 6

True

Question 7

Spray drift only occurs ________ of the spray application

Answer 7

downwind

Question 8

One of the most resent navigation tools today is GPS. GPS stand for

Answer 8

Global positioning system

Question 9

Spray droplet size decreases as aircraft travel speed increases because

Answer 9

air shear action on spray droplets causes them to break up, making smaller droplets

Question 10

Who is responsible for ensuring the notification provision of the Workers Protection Standard?

Answer 10

The on-site field crew members

Question 11

In general, solid stream nozzles tend to generate

Answer 11

relatively coarse sprays, as do low-drift nozzles

Question 12

In order to double the spray out-put from a nozzle, pump pressure must be approzimately

Answer 12

Quadrupled (4x increase)

Question 13

Increasing the Ram-Air Spreader hopper feed rate will typically cause;

Answer 13

a decreased in swath width

Question 14

Microweather which ground level or within plant canopy weather conditions at or near the target site,

Answer 14

Affects all outdoor pesticide applications

Question 15

Unsatisfactory single-pass distribution patterns result from most ram-air devices if the target site application rate is either

Answer 15

Less than 50lbs. per acre
More than 250 lbs. per acre
Targeted ejection rate is more than 35 lbs. per second

Question 16

When ferrying to and from an application site it is recommended that the aircraft maintain a minimum altitude of

Answer 16

500 feet

Question 17

A boom discharge rate is typically expressed in

Answer 17

gallons per minute (gpm)

Question 18

a nozzle that generates spray droplets by causing the spray mix liquid to be flung outward from the center and passes through a rotating screen is called

Answer 18

rotary atomizers

Question 19

Resent findings of aerial drift research indicate that output from pattern nozzles are likely to;

Answer 19

emit drift-prone spray droplets unless the cone pattern tips have been configured to produce coarse spray droplets

Question 20

pesticides formulated as a dust are

Answer 20

particularly prone to off target movement

Question 21

Differential GPS utilizes

Answer 21

two GPS receivers

Question 22

To obtain a current copy of revisions of 14 CFR 137 that effect the application one should contact

Answer 22

Superintendent of Documents U.S. Government Printing Office
Washington, D.C. 20402

Question 23

According to 137, each aircraft in service must contain

Answer 23

a facsimile copy of the agricultural aircraft operation certificate

Question 24

Of the main shapes of spray boom, which is unlikely to cause turbulence and is preferred cross-section shape of an aerial spray boom?

Answer 24

Airfoil (wing-shaped)

Question 25

Application height is the distance between the nozzle tip and the target site

Answer 25

Which is 8 - 10 feet

Question 26

Atmospheric stability has an impact on drift potential,

Answer 26

stable air promotes spray drift

Question 27

Inlet vane repositioning is typically used to make;

Answer 27

major adjustments toward ram-air spreader swath uniformity

Question 28

Unless a spray plane is being set up exclusively for low volume work, hydraulic system pupming should generally have tubing diameter greater than 1 inch

Answer 28

they should have approximately 2 inch tubing

Question 29

Unless this will determine the swath width is to

Answer 29

do a pattern test

Question 30

The single most important factor effecting spray drift is;

Answer 30

Spray droplet size

Question 31

A surface active agent surfactant reduces the spray droplets dynamic surface tension, adding surfactant to a batch of spray turns out to be a good way to;

Answer 31

increase drift potential

Question 32

Under 137 an agriculture aircraft operator certificate remains valid and effective for;

Answer 32

until it is surrendered, suspended, or revoled

Question 33

The spray droplet spectrum of any nozzle tip is least altered by air shear when it's nozzle mounting angle;

Answer 33

corresponds to airflow direction

Question 34

The basic equipment required for DGPS during aerial application;

Answer 34

1) GPS mobile receiver 2) GPS antenna 3) lightbar 4) CPU

Question 35

Whenever both state and federal law supply specific provision governs aerial application

Answer 35

state law governs the issue

Question 36

These are 3 variables that influence that boom discharge rate

Answer 36

Nozzle tip size Total number of working nozzles on the boom At-nozzles spray pressure (pump-pressure)

Question 37

Needle-and-seat check valves tend to be less labor intensive to clear the clogs that diaphragm check valves these are examples of;

Answer 37

Nozzle Anti-Drip Devices

Question 38

The most energy efficient flight pattern

Answer 38

the racetrack pattern

Question 39

What influences application uniformity for very low application rates of dry products;

Answer 39

even flow through the metering gate

Question 40

Two variables that influence the treated area progress rate (apm);

Answer 40

swath width, speed of the aircraft as it passes over the target site

Question 41

For rotor aorcraft, boom length should be

Answer 41

80% of rotor span

Question 42

In almost every case boom length should not exceed;

Answer 42

75%

Question 43

WAAS was recently developed by the

Answer 43

Federal Aviation Agency (FAA)

Question 44

In general, the capacity of delivering comparably high boom outputs while working against a relativity low spray pressure makes the ___________ well suited for many aerial application equipment configuration

Answer 44

centrifugal pump

Question 45

Propwash displacement in fised wing aircraft is caused by propeller rotation producing a spiral slipstream about the fuselage, how does this effect the spray pattern;

Answer 45

moves particles from the right to the left

Question 46

Hydraulic piping and fittings should have a diameter of ________ for hugh volume

Answer 46

3 inches

Question 47

A typical onboard DGPS computer enable aerial guidance, waypoints, mapping, therefore

Answer 47

Flaggers are eliminated

Question 48

Pesticides moving offsite after contacting hot surfaces like bare soil and then evaporates with water is called

Answer 48

co-distillation

Question 49

For complete information on the process to follow to obtain a FAA pilot certificate for agriculture operations, refer to FAA advisory circular 137-1.A. You may obtain this form from the local

Answer 49

FSDO

Question 50

The best possible mounting configuration of a ram-air spreader is the one that causes the least turbulence. Having the smoothest airflow into, around, and out of the spreader performance and provides good application results.

Answer 50

True