TEXAS PESTICIDE APPLICATOR UPDATED FINAL
EXAM QUESTIONS AND ANSWERS SURE A+
✔✔How is LD 50 used?
a. LD 50 is used with other tests to place pesticides in a " toxic category" and give them
a "signal word."
b. LD 50 is used to compare the toxicity of different chemicals.
c. LD 50 is used to tell how a chemical acts and how sensitive different organs within an
animal or human might be. - ✔✔a. LD 50 is used with other tests to place pesticides in a
" toxic category" and give them a "signal word."
✔✔LC 50 means "lethal _________ fifty." It refers to the amount of chemical in the air
that caused half of the test animals to die when they inhaled it. - ✔✔Concentration
✔✔Six milligrams per kilogram (mg/kg) is equal to __________ parts per million. -
✔✔six
✔✔What signal word must be on the label for pesticides classified as "relatively non-
toxic"
a. CAUTION!
b. DANGER!
c. WARNING! - ✔✔a. CAUTION!
✔✔What signal word must be on the label for pesticides classified as "Highly toxic"?
a. CAUTION!
b. DANGER!
c. WARNING! - ✔✔b. DANGER!
,✔✔What signal word must be on the label for pesticides classified as "Slightly toxic"?
a. CAUTION!
b. DANGER!
c. WARNING! - ✔✔a. CAUTION!
✔✔What signal word must be on the label for pesticides classified as "moderately
toxic"?
a. CAUTION
b. DANGER
c. WARNING - ✔✔c. WARNING
✔✔The toxicity of a substance is its ability to cause injury, while __________ is the risk
or chance that harm will come from using the pesticide. - ✔✔hazard
✔✔Is a highly toxic material always very hazardous?
a. No, if a highly toxic material is handled properly it could actually pose low risk or
hazard.
b. Yes, no matter how it is handled a highly toxic material is always hazardous. - ✔✔a.
No, if a highly toxic material is handled properly it could actually pose low risk or hazard.
✔✔Which of the statements below is not true about a pesticide deposit?
a. A deposit is pesticide that remains on treated surfaces right after application.
b. Pesticide deposits may or may not be seen easily.
c. Most deposits remain on surfaces for a very long time. - ✔✔c. Most deposits remain
on surfaces for a very long time.
✔✔Which of the statements below is not true about a pesticide residue?
a. Some residues may remain for months or years.
b. Residue information is required for each crop you treat.
c. residues are found only on target crops and surfaces. - ✔✔Residues are found only
on target crops and surfaces.
✔✔A __________ is the maximum amount of pesticide residue allowed on a harvested
crop, set by the EPA. - ✔✔Tolerance
✔✔Can a harvested crop contain more than the set tolerance of a pesticide and still be
legally sold?
a. No, it cannot be legally sold
b. Yes, it may be sold if it is not condemned or seized.
c. Yes, it may be sold if it is identified as contaminated. - ✔✔No, it cannot be legally
sold.
✔✔What margin of safety ("safety factor") does the EPA use to set tolerances?
a. 10 times
, b. 100 times
c. 1,000 times - ✔✔b. 100 times
✔✔Food may have no residues at all because the residues may have degraded or the
crop may have been treated with a minimum dose of a pesticide. T/F - ✔✔True
✔✔Soil and plant surfaces may contain pesticide residue even when they are not
directly sprayed with the pesticide. T/F - ✔✔True
✔✔EPA sets two kinds of tolerances: __________ __________ tolerances for
pesticides that indirectly contact food; and tolerances for pesticides applied directly for
food. - ✔✔Negligible residue, finite
✔✔"Preslaughter interval" or "preharvest interval" refers to the ____________ number
of days allowed between the last pesticide application and the slaughter or harvest day.
a. least
b. most - ✔✔Least
✔✔No pesticide my be bought, sold or used in the U.S. until it has federal registration
for the product, the use and the label. T/F - ✔✔True
✔✔Sometimes even small environmental changes can greatly reduce the chances of
survival for fish and wildlife. T/F - ✔✔True
✔✔When a pesticide evaporates and moves off target, this is called __________
__________ - ✔✔Vapor drift
✔✔Which of these additional factors does not influence drift?
a. Particle size
b. Pollution
c. Nozzle design and orientation
d. Temperature - ✔✔b. Pollution
✔✔Which of these additional factors does not influence drift?
a. Humidity
b. Height of release
c. Wind speed and direction
d. Reentry interval - ✔✔Reentry interval
✔✔Why should honeybees be protected?
a. Because they are the most important beneficial insect
b. Because poisoned bees are more dangerous to people and animals
EXAM QUESTIONS AND ANSWERS SURE A+
✔✔How is LD 50 used?
a. LD 50 is used with other tests to place pesticides in a " toxic category" and give them
a "signal word."
b. LD 50 is used to compare the toxicity of different chemicals.
c. LD 50 is used to tell how a chemical acts and how sensitive different organs within an
animal or human might be. - ✔✔a. LD 50 is used with other tests to place pesticides in a
" toxic category" and give them a "signal word."
✔✔LC 50 means "lethal _________ fifty." It refers to the amount of chemical in the air
that caused half of the test animals to die when they inhaled it. - ✔✔Concentration
✔✔Six milligrams per kilogram (mg/kg) is equal to __________ parts per million. -
✔✔six
✔✔What signal word must be on the label for pesticides classified as "relatively non-
toxic"
a. CAUTION!
b. DANGER!
c. WARNING! - ✔✔a. CAUTION!
✔✔What signal word must be on the label for pesticides classified as "Highly toxic"?
a. CAUTION!
b. DANGER!
c. WARNING! - ✔✔b. DANGER!
,✔✔What signal word must be on the label for pesticides classified as "Slightly toxic"?
a. CAUTION!
b. DANGER!
c. WARNING! - ✔✔a. CAUTION!
✔✔What signal word must be on the label for pesticides classified as "moderately
toxic"?
a. CAUTION
b. DANGER
c. WARNING - ✔✔c. WARNING
✔✔The toxicity of a substance is its ability to cause injury, while __________ is the risk
or chance that harm will come from using the pesticide. - ✔✔hazard
✔✔Is a highly toxic material always very hazardous?
a. No, if a highly toxic material is handled properly it could actually pose low risk or
hazard.
b. Yes, no matter how it is handled a highly toxic material is always hazardous. - ✔✔a.
No, if a highly toxic material is handled properly it could actually pose low risk or hazard.
✔✔Which of the statements below is not true about a pesticide deposit?
a. A deposit is pesticide that remains on treated surfaces right after application.
b. Pesticide deposits may or may not be seen easily.
c. Most deposits remain on surfaces for a very long time. - ✔✔c. Most deposits remain
on surfaces for a very long time.
✔✔Which of the statements below is not true about a pesticide residue?
a. Some residues may remain for months or years.
b. Residue information is required for each crop you treat.
c. residues are found only on target crops and surfaces. - ✔✔Residues are found only
on target crops and surfaces.
✔✔A __________ is the maximum amount of pesticide residue allowed on a harvested
crop, set by the EPA. - ✔✔Tolerance
✔✔Can a harvested crop contain more than the set tolerance of a pesticide and still be
legally sold?
a. No, it cannot be legally sold
b. Yes, it may be sold if it is not condemned or seized.
c. Yes, it may be sold if it is identified as contaminated. - ✔✔No, it cannot be legally
sold.
✔✔What margin of safety ("safety factor") does the EPA use to set tolerances?
a. 10 times
, b. 100 times
c. 1,000 times - ✔✔b. 100 times
✔✔Food may have no residues at all because the residues may have degraded or the
crop may have been treated with a minimum dose of a pesticide. T/F - ✔✔True
✔✔Soil and plant surfaces may contain pesticide residue even when they are not
directly sprayed with the pesticide. T/F - ✔✔True
✔✔EPA sets two kinds of tolerances: __________ __________ tolerances for
pesticides that indirectly contact food; and tolerances for pesticides applied directly for
food. - ✔✔Negligible residue, finite
✔✔"Preslaughter interval" or "preharvest interval" refers to the ____________ number
of days allowed between the last pesticide application and the slaughter or harvest day.
a. least
b. most - ✔✔Least
✔✔No pesticide my be bought, sold or used in the U.S. until it has federal registration
for the product, the use and the label. T/F - ✔✔True
✔✔Sometimes even small environmental changes can greatly reduce the chances of
survival for fish and wildlife. T/F - ✔✔True
✔✔When a pesticide evaporates and moves off target, this is called __________
__________ - ✔✔Vapor drift
✔✔Which of these additional factors does not influence drift?
a. Particle size
b. Pollution
c. Nozzle design and orientation
d. Temperature - ✔✔b. Pollution
✔✔Which of these additional factors does not influence drift?
a. Humidity
b. Height of release
c. Wind speed and direction
d. Reentry interval - ✔✔Reentry interval
✔✔Why should honeybees be protected?
a. Because they are the most important beneficial insect
b. Because poisoned bees are more dangerous to people and animals
