141 S24 B

What is the function of a step-up transformer in a power station arrangement?

• a) It decreases voltage
• b) It increases current
• c) It increases voltage
• d) It decreases current

Why is it advantageous to have smaller current when transmitting electricity over long distances?

• a) It reduces losses due to resistance
• b) It reduces the voltage
• c) It requires thicker cables
• d) It increases costs

What is the primary purpose of a step-down distribution transformer near the customer?

• a) To increase voltage
• b) To decrease current
• c) To lower voltage
• d) To lower current

What determines the limit of a transformer's rating?

• a) The voltage it handles
• b) The current it handles
• c) The heat generated in the transformer
• d) The primary voltage

Transformers are rated in:

• a) Watts
• b) Amperes
• c) Volt-Amps (VA)
• d) Ohms

What does the "k" stand for in "kVA" and "M" in "MVA" when rating transformers?

• a) Kilo (1,000)
• b) Million (1,000,000)
• c) Kilowatt
• d) Megawatt

What does the VA rating of a transformer indicate?

• a) The voltage it can handle
• b) The load it can deliver without overheating
• c) The current it can handle
• d) The primary voltage

The VA rating is the same for which sides of the transformer?

• a) Primary and Secondary
• b) Primary only
• c) Secondary only
• d) None of the above

How does a transformer control or limit the possible output current level?

• a) By increasing the voltage
• b) By reducing the voltage
• c) By limiting the heat generated
• d) By decreasing the winding size

What is the primary function of a transmission or power transformer?

• a) To supply electricity to households
• b) To distribute power to industrial premises
• c) To transmit power between high-voltage networks
• d) To supply power to small appliances