433A Pneumatic Systems 5

Question 1

What is the formula for calculating the theoretical force output of a pneumatic cylinder?

Accepted Answer

Force = Pressure × Piston Area

Answer

Force = Pressure × Volume

Answer

Force = Flow Rate × Pressure

Answer

Force = Bore Diameter × Stroke Length

Question 2

What is the purpose of a shuttle valve in a pneumatic circuit?

Accepted Answer

To automatically select the higher of two pressure signals and pass it to the output, functioning as a pneumatic OR gate

Answer

To shuttle air between two compressors

Answer

To transport components between stations

Answer

To create alternating pressure pulses

Question 3

What is the most common cause of premature pneumatic cylinder seal failure?

Accepted Answer

Contaminated or unlubricated air supply, causing seal drying and abrasive wear

Answer

Operating at the rated pressure

Answer

Using the correct bore size

Answer

Mounting the cylinder horizontally

Question 4

How does a pneumatic booster (air amplifier) increase pressure?

Accepted Answer

By using a large-area piston driven by supply pressure to compress air in a smaller cylinder to a higher pressure

Answer

By heating the air

Answer

By adding more air from a second compressor

Answer

By reducing the volume of the air tank

Question 5

What safety feature must be included when a pneumatic cylinder supports a vertical load?

Accepted Answer

A mechanical locking device or holding valve to prevent the load from falling if air pressure is lost

Answer

A larger bore cylinder

Answer

Faster speed controls

Answer

Additional mufflers on the exhaust

Question 6

What is the advantage of using polyurethane tubing over nylon tubing in pneumatic systems?

Accepted Answer

Greater flexibility, better abrasion resistance, and smaller bend radius

Answer

Higher pressure rating

Answer

Lower cost

Answer

Higher temperature capability