Electrical

Question 1

Voltage

Answer 1

Difference in electrical potential between two points (no change in load)

Question 2

Current

Answer 2

Flow of electric charge; dependent on load

Question 3

Frequency

Answer 3

Cycles/Sec; US is 60 Hz

Question 4

Apparent Power

Answer 4

Power is the rate that energy is moved

Question 5

Difference between real and apparent power?

Answer 5

Real is what we consume and apparent is what we demand

Question 6

Leading pf

Answer 6

Current leading voltage; capacity; CAPACITY TO LEAD (electric)

Question 7

Lagging pf

Answer 7

Current lagging voltage: Inductive: INDUCED LAG (magnetic)

Question 8

Impedance

Answer 8

The opposition a circuit presents to current

Question 9

Why do we have transformers?

Answer 9

To transfer to one voltage to another

Question 10

What does less current mean in terms of voltage?

Answer 10

Less voltage drop over a distance and a more efficient power transfer

Question 11

What are the sources of primary energy used in power plants?

Answer 11

Coal, Nuclear, Natural Gas, Hydro

Question 12

What are the key components on the path from power plant to facilities?

Answer 12

Power Plant (Generation), Transmission Lines, Power Substation, Distribution

Question 13

Looped v Radial System Configurations?

Answer 13

Looped - redundancy and isolation of faults (GOAL)
Radial - simple and cheap

Question 14

Overhead Distribution Advantages/Disadvantages

Answer 14

Adv: Less expensive, easy access, straightforward
Disadv: Obstructions

Question 15

Underground Distribution Advantages and Disadvantages

Answer 15

Adv: Hidden, Less exposed, more capacitance
Disadv: Expensive, Digging hazard