TXST ATMS 25' Flashcards by Justin Wood

Centrifugal force can overturn a boom sprayer during operation when 1) the center of gravity moves higher, 2) the points where the wheels contact the ground narrow, and 3) ____.

travel speed increases

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To double the flow rate, increase the pressure by a factor of _____.

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A PTO shaft rated for 540 rpm has _____ splines.

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Liquid in the spray tank can be agitated by _____.

all of the above

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As spray nozzle tips wear, the rate of flow ____.

increases

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Most sprayers use _____ when a quick shut-off is needed.

check valves

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Common types of strainers include all the following except _____.

sump strainers

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Spray pumps are rated by _____.

flow in GPM / LPM at a specified speed & pressure

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Nozzle tips with the longest expected wear life are manufactured from _____.

ceramic

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Pumps should have a reserve capacity of _____ to allow for wear.

10 – 20 %

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At the end of each spraying season, nozzle tips and screens should be _____.

removed, cleaned and stored in diesel fuel

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Variable rate application (VRA) spraying involves three major control components.

rotators

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The formula for effective field capacity is (speed X width) / 8.25. A boom sprayer with 20’ total boom width travelling at 3.25 mph has an effective field capacity of _____.

7.87 acres / hour

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A_____ pump is NOT a positive displacement pump.

centrifugal

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Select a nozzle screen that has a mesh opening that is _____.

slightly smaller than the nozzle tip

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Recommended service for a sprayer includes _____.

all the above

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Boom sprayers are generally designed to operate at _____ psi.

10 - 80

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Consider spray angle & pattern, composition and ____ when selecting nozzle tips.

discharge rate

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When calibrating sprayers, replace any nozzle that _____.

all the above

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When estimating Hp needs for spraying applications, allow a pump efficiency factor of _____.

50 – 60 %

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Variable rate application (VRA) technology does not use _____ maps.

isobar

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To apply 3 pints of pesticide per acre in 11 gallons of spray, must add _____ gallons of pesticide to a 300-gallon tank.

10.22

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Do not use _____ to clean nozzle tips.

wire or metal objects

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When spraying agricultural / horticultural crops, the best shape for field efficiency is _____.

rectangular

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Orifice shape on a spray nozzle determines _____.

all of the above

Agricultural sprayers generally use _____ pumps.

roller

In the formula GPM = (GPA X MPH X W) / 5940, the number 5940 is _____.

the square feet in an acre

Self-tapping screws attaching the nozzle holders to the spray boom are probably _____.

Tek™ screws

As spray pressure increases, _____.

average droplet size decreases to a limit

A boom sprayer moving at 3.5 mph can theoretically spray _____ acres per hour.

5.09

Agricultural sprayers are calibrated based on _____.

gallons per acre

Common examples of pesticide exposure do not include _____.

orbital

When reviewing SDS data for a particular pesticide, LD50 data is found in the _____.

health hazard data

PVC pipe connections are made with a special _____.

cement

PVC connections should be cleaned chemically with an appropriate _____.

solvent

Typically, _____ is not a factor in determining the kind of PVC pipe to use.

brand

Using a_____ generally results in better PVC connections.

primer

PVC connections can be mechanically cleaned with _____.

sandpaper

Slip fittings for PVC tubing are available in the same configurations as for _____ pipe.

galvanized

PVC connections will cure in approximately _____.

15 – 20 seconds

The wastewater runoff produced by residential systems is called _____.

effluent

SDS is the acronym for _____.

safety data sheets

A factor that generally does not require sprayers to be recalibrated is _____.

use of PVC piping

Septic tanks are connected to _____ with runs of PVC pipe.

field disposal systems

Surface application systems are generally the final component of rural _____.

aerobic treatment units

PVC pipe is popular because it is NOT _____.

heavy

PVC pipe is well-suited for all the following uses except _____.

hot water

Perform a _____ test to determine the rate of water absorption into soil.

percolation

A horticultural crop producer pays a base rate of $1.03 per thousand gallons of water (TGAL); the bill for 6 months of minimum usage will be _____.

6.18

In water measurement, 1000 gallons of water (TGAL) equals _____ cubic feet and covers _____ acre feet. One gallon = 0.133 cubic feet, one acre-foot = 326,000 gallons.

1336.0, 0.36 or 133.68, 0.00306

A horticultural irrigation system applies 12 gpm; the grower applies _____ gallons in 30 days if the system runs for 10 minutes every 5 days.

720

The irrigation method with the greatest application efficiency is _____.

subsurface

Considerations for selecting irrigation systems do not include _____.

brand availability

An irrigation system that does not minimize water usage is _____.

furrow

All pipe runs in an irrigation circuit should run from the _____ head in a circuit.

first

Measure _____ water pressure when irrigation water is flowing through the system.

dynamic

Irrigation water pressure is measured in _____.

psi

Schedule 40 PVC pipe is rated to withstand _____ applications than Sch 80 PVC.

lower water pressure

Schedule 40 PVC and Schedule 80 PVC have the same _____.

outside diameter

Schedule 40 PVC is well-suited for _____ projects.

irrigation

Schedule 40 PVC and Schedule 80 PVC tubing use the _____ fittings.

same

Schedule 40 PVC pipe comes in standard _____ lengths.

10-20’

Schedule 80 PVC pipe comes in standard _____ lengths.

10-20’

Schedule 40 PVC pipe is suitable for both_____ and gray water.

potable

Schedule 40 PVC pipe can easily be cut with a_____ or a hacksaw.

tubing cutter

If Sch 40 PVC is bent at a sharp angle, simply _____.

cut out the damaged section

Total static head is the _____ distance water must be raised for irrigation.

vertical

Electric motors have many advantages; _____ is not one of them.

short life span

Electric motors consume about _____ watts of electricity per hour of work.

746

Fractional horsepower motors have a power factor of _____.

1.2

Single-phase (1Ø) electric motors have a power factor of _____.

Three-phase (3Ø) motors have power factors in the _____ range.

0.8

Service factor (SF) is the amount of ___ an electric motor can tolerate on a continuous basis.

overload

_____ is not a common type of motor used in agricultural applications.

spin-start

Electric motors generally have either sleeve bearings or _____ bearings.

anti-friction

Electric motors with a two-wire service entrance conductor are generally _____.

single-phase

There are _____ in one acre.

43,560 square feet

Electric motors with grooved shafts often use a ____ to hold a pulley in place.

key

Wet electric motors should be dried _____ before reuse.

thoroughly

An unacceptable method of protecting electric motors from overload is _____.

unplugging when the conductor warms up

A section of land contains _____ acres.

640

Motor overloads are likely caused by any except _____.

belts too tight

A service factor of 1.25 indicates that a motor can tolerate _____.

25% overloading for an extended period

A grower’s electricity cost is 0.06/KWH. The cost of pumping 4500 gallons of water with a ¼ hp motor at a rate of 500 gallons / hour is _____

16.2 cents

Your operate your shallow irrigation well with a 1/3 hp motor @ 1750 rpm and 2’ pulley; to, turn your pump shaft at 875 rpm, you need a _____ pulley

4”

For this shallow well & pump, the replacement belt length if you switch to a 3” motor pulley and a 6” pump shaft pulley is _____.

38.4”

There are several common types of motor enclosures, not including _____.

vented proof

The signal word indicating a potentially hazardous condition that could result in death or serious injury is _____.

danger

You are a custom applicator and can purchase a used Wylie TW-90 self-propelled sprayer with a 46’ boom width for $81,500.00. You anticipate that the sprayer will pay for its purchase in 7 years. Allow a salvage value of $8150.00. If your custom rate is $3.00 per acre, you must spray approximately____ acres per year to own the sprayer in 7 years.

3500

The dealer will finance this sprayer for 5 years at 6% simple interest. If you pay off the sprayer in 5 years; each annual payment will be _____.

21190

A tractor and sprayer that cover 500 ft in 48 seconds is traveling _____ mph.

7.1

When transporting a self-propelled sprayer on a public road, always _____.

all the above

Always use ANSI approved eye protection _____.

any time you are working in chemical applications

Your subsurface irrigation system waters a herb planting; you 0.0582 cents per KWH to power your ¾ hp well pump, costing you ___ to apply 70 gallons of water in 24 hours.

0.78 cents

Safety words such as danger, duck, and watch out! are positioned near _____.

hazards

Motor horsepower is _____.

1 hp = 746 watts

A 4’ diameter pulley turning with a force of 500 lbs. develops _____ of torque.

2000 foot-pounds

A given field contains 326,570 square feet, or _____ acres.

7.5

Use an ASABE hand signal to tell the spray rig operator to lower the boom; _____.

point your arm & finger downward and making a circular motion

You use a 3 hp electric motor to pump municipal effluent from your storage lagoon onto your sod plantings. You will pay __ to apply 345K gallons of liquid to your sod in 16 hours through a side roll, when power costs you 0.009 cents

0.3456 cents

TXST ATMS 25' Flashcards

(100 cards)