Name the electrical components represented by the symbols below:

here are the answers to the questions from the image:

2.3 List THREE advantages of a pneumatic system over a hydraulic system.

• Pneumatic systems use air, which is readily available and can be exhausted into the atmosphere without environmental concerns.
• Pneumatic systems are generally cleaner as there is no oil leakage.
• Pneumatic systems can operate at higher speeds.
• Air is compressible, which provides a cushioning effect, reducing shock.
• Pneumatic systems are less sensitive to temperature changes.

2.4 Give FIVE checks that must be carried out after servicing a hydraulic system.

• Check for correct fluid level.
• Check for leaks at all connections and seals.
• Check for correct operating pressure.
• Check for proper functioning of all components (e.g., cylinders, valves).
• Check for air in the system (bleeding if necessary).
• Check for correct temperature of the fluid during operation.
• Check for proper filtration.

3.1 Name the electrical components represented by the symbols below:

3.1.1

• Ammeter

3.1.2

• Battery (or DC power supply)

3.1.3

• Earth (or Ground)

3.1.4

• Voltmeter

3.2 State THREE consequences of wiring a three-pin electrical plug incorrectly.

• Risk of electric shock to the user.
• Damage to the appliance or electrical circuit.
• Risk of fire due to overheating or short circuits.
• The appliance may not function correctly or at all.

3.3 Name FOUR protective devices used in electrical circuits.

• Fuses
• Circuit breakers (e.g., Miniature Circuit Breakers - MCBs)
• Residual Current Devices (RCDs) or Earth Leakage Circuit Breakers (ELCBs)
• Surge protectors
• Grounding/Earthing (while not a device, it's a protective measure)