Ozone

question 131

Multiple Choice

Ozone

• A)dissociates to O and O₂ by absorbing UV energy.
• B)is formed by the combination of oxygen atoms with O₂ molecules.
• C)can be destroyed by chlorine atoms that result from the decomposition of chlorocarbons in the stratosphere.
• D)All of the.
• E)None of the.

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Definitions:

Wedge Brakes

An air foundation brake system in which an air chamber forces a wedge between brake shoes forcing them into a brake drum to effect retarding force. Wedge brakes are usually actuated on both sides (unlike S-cam brakes) and so have higher theoretical braking efficiencies.

Maintenance Costs

The expenses associated with keeping an item, equipment or property in its best operating condition, including repairs, replacements, and routine check-ups.

Dry Cement

A powdery substance made by calcining lime and clay, used with water to make concrete, mortar, or plaster.

Dry Bulk Pressure Hopper

A container designed for transporting dry bulk materials, utilizing pressurized air to aid in the unloading process.