141 S3 Generators

1. What is the primary principle behind an AC power generator?

• a) Electromagnetism
• b) Electrostatics
• c) Thermal expansion
• d) Chemical reaction

2. What is a basic component of an AC generator?

• a) Transformer
• b) Solar cell
• c) Winding (loop of conductor)
• d) Battery

3. How is the output voltage of a simple generator transferred to an external circuit?

• a) Using fuses
• b) Through slip rings and brushes
• c) Using transformers
• d) Via batteries

4. What are slip rings in a generator typically made from?

• a) Copper
• b) Steel
• c) Carbon
• d) Aluminum

5. What kind of generator is used when only small amounts of power are required?

• a) Three-phase generator
• b) Solar generator
• c) Simple AC generator
• d) Wind turbine generator

6. How many electrical windings does a three-phase generator have?

• a) 2
• b) 3
• c) 4
• d) 5

7. What is the angular separation between the windings of a three-phase generator?

• a) 90º
• b) 120º
• c) 180º
• d) 360º

8. Which component in a three-phase generator helps induce an emf into the windings?

• a) Stator
• b) Rotor
• c) Shaft
• d) Bearings

9. What is the role of the DC exciter coil in a generator?

• a) It produces voltage directly
• b) It cools the system
• c) It magnetizes the rotor
• d) It controls speed

10. Why are most electric power systems generated as three-phase power instead of single-phase?

• a) Higher power transmission cost
• b) Easier maintenance
• c) Greater capacity for the same size generator
• d) Lower maintenance cost