Final Review

Question 1

What is the term for electrical charge at rest

Answer 1

Electrostatic

Question 2

What is required to form magnetic domain

Answer 2

Magnetic moments

Question 3

How many electrons in a coulomb

Answer 3

6.28x 10^18

Question 4

To calculate the EMax value of a sine wave, divide the RMS value by the ( ) or multiply RMS by ( )

Answer 4

Sine of 45°, square root of 2

Divide by .707. Times by .707

Question 5

Voltage is the measurement of difference in

Answer 5

Charge between 2 poles

Question 6

An emf Maintains the difference in charge

Answer 6

True

Question 7

Symbol for electrical charge

Answer 7

Q

Question 8

When checking polarity on an AC circuit red goes to hot and black goes to negative

Answer 8

False

Question 9

ELI the ICE man

Answer 9

Inductance: voltage leads current
Capacitive: current leads voltage
Both by 90°

Question 10

A lock can have more than one key

Answer 10

No

Question 11

Amount of mA to kill you

Answer 11

100-200

Question 12

Inductance is the opposition of

Answer 12

Change in current

Question 13

Thermocouple use heat to generate electricity

Answer 13

True

Question 14

Gas burners can have built in ______ ignition system

Answer 14

Piezo-based

Question 15

If the amperage reading is lower then your clamp on ammeters capability, you can loop the single conductor through the clamp to take a reading

Answer 15

True

Question 16

Polarity is not a factor when using an ohmmeter

Answer 16

True

Question 17

Polarity is not important when measuring ac current

Answer 17

True

Question 18

What is the voltage rating class 0 electrical gloves

Answer 18

Up to 1000

Question 19

One alternation occurs within 180 degrees of an electrical sine wave

Answer 19

True

Question 20

The time required for on alternation to complete is also known as a period

Answer 20

False

Question 21

Theee phase wires are white black and blue

Answer 21

False

Question 22

Single conductors have a max load of 80% of the rated 15A

Answer 22

True

Question 23

Fuse rating can be greater than 125% of the smallest wire or component in the circuit

Answer 23

True

Question 24

Fuses allow 3x their rated current for a few seconds for surging of motors

Answer 24

True

Question 25

What pole do flux lines leave and then enter

Answer 25

Leave through the north and enter through the south

Question 26

Megohmmeter is used to

Answer 26

Check wire insolation