3.5 Part 2 DC Sources

What is the typical specific gravity range of the electrolyte in a Ni-Cd cell?

• 1.15 - 1.20
• 1.24 - 1.30
• 1.30 - 1.40

What material is used to form the cathode in a Ni-Cd cell?

• Nickel Hydroxide (Ni(OH)₂)
• Cadmium (Cd)
• Lead Dioxide (PbO₂)

What is the main advantage of Ni-Cd cells over lead-acid cells?

• Lower Cost
• Higher Charge/Discharge Rates
• Smaller Physical Size

Which process is used to form the porous baseplates in a Ni-Cd cell?

• Electroplating
• Sintering
• Anodizing

What role does the separator play in a Ni-Cd cell?

• Facilitates ion flow
• Enhances electron flow
• Prevents short circuits

What is the primary electrolyte used in Ni-Cd cells?

• Sulfuric Acid (H₂SO₄)
• Potassium Hydroxide (KOH)
• Sodium Hydroxide (NaOH)

What is the disadvantage of Ni-Cd cells compared to lead-acid cells?

• Shorter Operational Life
• Lower Voltage Output per Cell
• Higher Risk of Overcharging

What is the color of the positive plate in a fully charged lead-acid cell?

• Clear slate grey
• Deep chocolate brown
• Light blue

What causes sulphation in a lead-acid cell?

• Prolonged charging
• Not fully charging the cell periodically
• Adding too much electrolyte

What is the recommended level of electrolyte above the top of the plates in a lead-acid cell?

• 5-10 mm
• 10-15 mm
• 20-25 mm