Match the method of directional valve actuation with its description.

Description:
1. Involves air pressure and a pilot port.
2. Ideal for remote operations; uses solenoids.
3. Often used as an override.
4. Uses a device such as a cam.
5. Enabled by liquid from a pilot port.

Possible Answers:
A. 1. Pneumatic 2. Electrical 3. Manual 4. Mechanical 5. Hydraulic
B. 1. Hydraulic 2. Electrical 3. Manual 4. Mechanical 5. Pneumatic
C. 1. Pneumatic 2. Electrical 4. Mechanical
D. 2. Mechanical 3. Manual 4. Electrical

Pneumatic actuators use air pressure, electric actuators rely on electric motors, and hydraulic actuators involve incompressible fluids for directional valve actuation.

Explanation:

Pneumatic: Pneumatic actuators use air pressure and pilot ports for directional valve actuation. An example is a pneumatic solenoid valve that uses compressed air for control.

Electric: Electric actuators utilize electric motors to move valves. They are often used for remote operations and can have failsafe mechanisms.

Hydraulic: Hydraulic actuators involve incompressible fluids and sealed sliding pistons to control valve movements. They are known for their instantaneous response.

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