What is the difference between a hydraulic and a pneumatic system?

What will be an ideal response?


Pneumatic systems use a fluid that is compressible and hydraulic systems use a fluid that is virtually incompressible. Pneumatic – Air or other gas & Hydraulics – water, oil, or glycol solution.

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Which of the following edgers can be installed mechanically?

a. wood b. vertical bricks c. concrete curb d. metal

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Potting mix should be high in perlite, sand, or coarse vermiculite to improve drainage

Indicate whether the statement is true or false

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Form tolerances require a reference to a datum.

Answer the following statement true (T) or false (F)

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Which refrigerant will likely become scarce after the year 2020?

A) HCFC-123 B) HFC-410A C) HFC-134a D) Ammonia

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