The Three Stable (I

question 251

Multiple Choice

The three stable (i.e.,nonvariable) gases in the atmosphere,in order of abundance from most to least,are

• A)oxygen,carbon dioxide,argon.
• B)nitrogen,oxygen,argon.
• C)carbon dioxide,argon,oxygen.
• D)oxygen,argon,nitrogen.

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Definitions:

Output Air Pressure

The pressure of air delivered from a compressor or a pressurized system, useful in various mechanical and pneumatic applications.

Drum Servo Brakes

A type of brake system that uses a servo mechanism to amplify the force applied by the driver, improving braking efficiency especially in heavy vehicles.

Self-energizing

Referring to a mechanism that uses the motion or force of its operation to increase its effectiveness without needing an external power source.

Secondary Shoes

Components of a drum brake system positioned to assist in braking, usually having less wear than primary shoes.