Chlorinated Hydrocarbons Have ____ Toxicity for Sensitive Organisms and Remain

question 72

Multiple Choice

Chlorinated hydrocarbons have ____ toxicity for sensitive organisms and remain in the soil for a _______ time.

• A) High; long
• B) High; short
• C) Low; short
• D) Low; long
• E) Medium; long

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Definitions:

Spur Gears

Cylindrical gears with teeth projecting radially and having edges parallel to the axis, used to transmit motion between parallel shafts in machinery.

Pinion

A small gear that engages with a larger gear or rack, often used to convert rotational motion to linear motion or vice versa.

Mechanical Advantage

The factor by which a mechanism multiplies the force put into it, enabling the lifting or moving of heavier loads with less effort.

Pitch Diameters

The effective diameter of a screw thread, halfway between the crests and roots, used in measuring and specifying thread sizes.