Pneumatics Quiz

What is the main difference between pilot-operated directional control valves and direct-operated valves?

• Pilot-operated valves have interchangeable parts, while direct-operated valves have unique parts.

• Pilot-operated valves have longer spools, while direct-operated valves have shorter spools.

• Pilot-operated valves use air signal to shift the spool, while direct-operated valves use return springs.

• Pilot-operated valves use electrical current, while direct-operated valves use mechanical force.

What is the advantage of using pilot-operated valves?

• They require no electrical current and can be used in explosive environments.

• They have shorter spools and are easier to maintain.

• They are more cost-effective than direct-operated valves.

• They have a higher working pressure capacity than direct-operated valves.

What is the function of a pilot in a 2-position valve?

• The pilot moves the valve spool against a spring and into the housing opposite the pilot.

• The pilot controls the flow of air from one port to another.

• The pilot maintains the spool position without maintaining pilot pressure.

• The pilot increases the working pressure capacity of the valve.

What is the purpose of using a pressure return in a pilot-operated valve?

• To increase the working pressure capacity of the valve.

• To return the valve to its normal position using air supply pressure.

• To maintain the spool position without maintaining pilot pressure.

• To exhaust the pilot pressure from the valve.