A main switchboard for an AC electrical...

Question 1 of 270705eccefa4bacbc34ba4d48473

A main switchboard for an AC electrical distribution system is different from a main switchboard for a DC distribution system in that it will be provided with which of the following meters?

Back

Question 1 of 27070

Study area:

A main switchboard for an AC electrical distribution system is different from a main switchboard for a DC distribution system in that it will be provided with which of the following meters?

No Illustration

This question does not have an illustration

🔍 Key Concepts

• Difference between AC (alternating current) and DC (direct current) behavior • Which quantities are unique or especially important to measure in AC systems but not typically present in DC systems • Normal instrumentation on both AC and DC switchboards (what do they have in common?)

💭 Think About

• Ask yourself: Which of these four measurements is only meaningful or normally needed when the current or voltage is changing direction periodically? • Which meters would you expect to find on both AC and DC systems to monitor load and system health? • For the remaining meter types, which one directly relates to the alternation rate of the AC waveform?

✅ Before You Answer

• Identify which quantities (current in amps, voltage in volts, power in kilowatts) are common to both AC and DC systems. • Decide which single quantity listed depends on the concept of cycles per second (Hertz, Hz). • Before choosing, confirm that your selected meter would have no practical reading on a pure DC system.