Basic Electricity

Question 1

AC is the term that refers to a current that ______ at regular intervals of time and that has altermatelt ____________ and _________ values.

Answer 1

reverses, positive, negative

Question 2

DC is a term that refers to current that flows in _____ direction

Answer 2

one

Question 3

Batteries produce _______ current through chemical reaction

Answer 3

direct

Question 4

Power system generators produce _______ current by cuting lines of magnetic force with a rotating conductor

Answer 4

alternate

Question 5

One complete AC wave is called a?

Answer 5

Cycle

Question 6

The acronym for alternating current is?

Answer 6

AC

Question 7

The acronym for direct current is?

Answer 7

DC

Question 8

The power grid in the USA operates the ____ system at ____ cycles by design.

Answer 8

AC, 60

Question 9

In a 60hz system, AC completes 60 cycles in…

Answer 9

one second

Question 10

The acronym CPS in an AC circuit stands for?

Answer 10

cycles per second

Question 11

one compete AC cycle is equivalent to _____ degrees.

Answer 11

360

Question 12

AC three phase power originates from the power plant _______

Answer 12

generator

Question 13

AC three phase rotation originates from the power plant _______

Answer 13

generator

Question 14

DC power _____ be connected directly to the AC power grid.

Answer 14

cannot

Question 15

DC power can be converted to AC power through a device called an?

Answer 15

inverter

Question 16

AC power can be converted to DC power through a device called an?

Answer 16

rectifier

Question 17

AC circuits have an _______ sine wave and _____ since wave.

Answer 17

AC and voltage

Question 18

AMPs are the measure of electical _______.

Answer 18

current

Question 19

The symbol for current is?

Answer 19

I

Question 20

The opposition of current flow, which converts electic energy into heat is called?

Answer 20

resistance

Question 21

The symbol of resistance is?

Answer 21

R

Question 22

The practical unit of electical pressure that will produce a current of one amp against a resistance of one ohm is called a what?

Answer 22

Volt

Question 23

The symbol for voltage is?

Answer 23

V

Question 24

What are the primary components of impedance?

Answer 24

inductive reactance, capacitive reactance and resistance

Question 25

What is the symbol of impedance?

Answer 25

Z

Question 26

The oppostion offered to the flow of AC by the inductance or capacitance of a part is called______ and is measured in ______?

Answer 26

reactance, ohms

Question 27

The process by which an electrical conductor becomes electified when near a separate charged body's magnetic field is called?

Answer 27

inductance

Question 28

What is the square root of 3? | This value is used to convert single phase voltage to 3 phase voltage

Answer 28

1.732

Question 29

When the condition across an open circuit is such that the voltage sine wave on one side matches the voltage sine wave on the other side in frequency and without phase angle difference with respect to all respective AC phases, the systems are considered to be in__________?

Answer 29

synchronization

Question 30

Apparent power consists of _____ power and _______ power and is expressed in ________.

Answer 30

active, reactive, MVA

Question 31

Reactive power is expressed as ______ and ________ do real work.

Answer 31

VAR, does not

Question 32

The number of cycles occurring in a given of time in an electric current is called?

Answer 32

Frequency

Question 33

The expression of cycles per second is commonly termed?

Answer 33

Hertz

Question 34

MW is________?

Answer 34

directional

Question 35

MVAR is ______?

Answer 35

directional

Question 36

AMPS are________?

Answer 36

bi-directional

Question 37

Amps are measured in normal AC power grids, expressed in the form of a total current value, inlcude both ______ and ______ amps

Answer 37

active and reactive

Question 38

Can reactive amps overload a facility, since they do not do real work?

Answer 38

Yes

Question 39

MVAR flows from the stronger _______ source ot eh weaker ________ source regardless of _______ transformation

Answer 39

MVAR, MVAR, Voltage

Question 40

MVAR flows from the _________ source to the ________ sink

Answer 40

voltage, voltage