Question 1

DDT has been found to:&#10;A) cause frequent cases of acute toxicity among exterminators.&#10;B) accumulate in the tissues of many animals.&#10;C) cause a significant number of accidental deaths.&#10;D) persist in the environment.&#10;E) both accumulate in the tissues of many animals and persist in the environment.

Accepted Answer

DDT is known for its persistence in the environment and its ability to bioaccumulate in the tissues of animals, leading to ecological and health concerns.

Question 2

Lindane, mirex, and DDT all belong to a group of pesticides called:&#10;A) organophosphates.&#10;B) chlorinated hydrocarbons.&#10;C) carbamates.&#10;D) naturally occurring substances.&#10;E) None of these is correct.

Accepted Answer

Lindane, mirex, and DDT are all chlorinated hydrocarbons, which are a class of synthetic pesticides known for their persistence in the environment and bioaccumulation in the food chain.

Question 3

Pesticides are:&#10;A) always highly toxic to humans.&#10;B) all synthetic chemicals.&#10;C) always the best weapon against insect pests.&#10;D) All of these are correct.&#10;E) None of these is correct.

Accepted Answer

Pesticides are not always highly toxic to humans, not all are synthetic, and they are not always the best solution for pest control.

Question 4

Agent Orange is an example of a(n):&#10;A) insecticide.&#10;B) fumigant.&#10;C) herbicide.&#10;D) fungicide.&#10;E) None of these is correct.

Accepted Answer

Agent Orange is a herbicide that was used by the U.S. military during the Vietnam War to eliminate forest cover and crops.

Question 5

One of the concerns that surrounded the use of Agent Orange was that it:&#10;A) contained very small amounts of dioxin.&#10;B) was not effective because it evaporated rapidly.&#10;C) was a major cause of night blindness.&#10;D) was transported home on the clothing of military personnel.&#10;E) All of these are correct.

Accepted Answer

Agent Orange contained dioxin, a highly toxic compound, which was a major concern due to its harmful health effects.

Question 6

What type of chemical hazard results from incomplete combustion of petroleum-based chemicals and other organic substances?&#10;A) Polychlorinated biphenyls&#10;B) Polycyclic aromatic hydrocarbons&#10;C) Volatile organic compounds&#10;D) Persistent organic pollutants&#10;E) None of these is correct.

Accepted Answer

Polycyclic aromatic hydrocarbons (PAHs) are chemical hazards that result from incomplete combustion of petroleum-based chemicals and other organic substances.

Question 7

As with nerve gases, which type of pesticides act on the nervous system of insects and higher organisms by disrupting the transmission of nerve impulses?&#10;A) Organophosphates&#10;B) Carbamates&#10;C) Organochlorines&#10;D) Pyrethrins&#10;E) None of these is correct.

Accepted Answer

Organophosphates act on the nervous system by inhibiting the enzyme acetylcholinesterase, leading to the accumulation of acetylcholine and disrupting nerve impulse transmission, similar to nerve gases.

Question 8

According to a 2005 report from the Environmental Protection Agency, levels of what organochlorine pesticide are low or undetectable in the United States population, which reflects progress in the control of toxic chemicals?

A) Dieldrin
B) Diazinon
C) Benzene
D) Acephate
E) None of these is correct.

Accepted Answer

Dieldrin is an organochlorine pesticide, and the 2005 EPA report indicated that its levels were low or undetectable in the U.S. population, showing progress in controlling such toxic chemicals.

Question 9

What form of carbamate is used mainly as an herbicide?&#10;A) Carbaryl&#10;B) Metam sodium&#10;C) Thiocarbamate&#10;D) Dithiocarbamate&#10;E) None of these is correct.

Accepted Answer

Thiocarbamate is the form of carbamate that is used mainly as an herbicide.

Question 10