Pneumatic Systems Flashcards

What is the primary purpose of an air receiver tank in a pneumatic system?

Answer: To store compressed air and dampen pressure fluctuations

An air receiver tank stores a reserve of compressed air and smooths out pressure pulsations from the compressor.

Which type of pneumatic actuator produces rotary motion?

Answer: Vane-type air motor

A vane-type air motor converts compressed air pressure into continuous rotary mechanical motion.

A pneumatic system shows rapid pressure drop when no actuators are active. The most likely cause is:

Answer: System leaks in fittings or tubing

Rapid pressure loss at rest almost always indicates air leaks in fittings, tubing, or valve seals.

What does the ISO symbol for a normally-closed 3/2 directional control valve indicate?

Answer: 3 ports, 2 positions, exhaust blocked at rest

A 3/2 normally-closed valve has 3 ports and 2 positions, with the output port blocked (no flow) in its rest state.

Which maintenance task is performed MOST frequently on a compressed air system?

Answer: Draining moisture from receiver tanks and filters

Draining condensate from receiver tanks and filter bowls is a daily or shift-level task to prevent water damage to components.

In a pneumatic FRL unit, what does the 'L' stand for?

Answer: Lubricator

FRL stands for Filter, Regulator, Lubricator — the three conditioning components mounted in series at the air supply.

A double-acting cylinder requires a 4/2 directional control valve rather than a 3/2 valve because:

Answer: Both extend and retract ports must be independently controlled

A double-acting cylinder has two air ports (cap end and rod end), requiring a valve with separate supply and exhaust paths for each side.