Lesson 2 - Electrical Energy Sources

Question 1

Which of the following is not a method that can be employed to force electrons out of their valance ring producing electrical current?

Answer 1

Cold air

Question 2

Which of the following is an effect or type of activity it can be produced by electrical energy?

Answer 2

Heat
Light
Magnetism
Pressure

Question 3

Chemical electricity is a type of an electricity or electrical charge that can be created by rubbing one type of material against a different type of material.

Answer 3

False

Question 4

Friction is a source of ____ electricity.

Answer 4

Static

Question 5

The chemical source of electricity is best represented in our daily lives by the

Answer 5

Battery

Question 6

Which image represents a 2 cell battery?

Answer 6

+
———
___
______
—
-

Question 7

What determines individual cell voltage of a battery?

Answer 7

The metals used for each plate

Question 8

When aluminum and silver are used for battery cell, the aluminum will be the negative electrode

Answer 8

True

Question 9

Batteries are divided into what two categories?

Answer 9

Primary cell and Secondary cell

Question 10

Which type of battery cell can be recharged several times?

Answer 10

Secondary cell

Question 11

____ is generated any time current flows?

Answer 11

Heat

Question 12

Copper and aluminum need less energy to move electrons therefore, these types of material are commonly used for conductors

Answer 12

True

Question 13

Which of the following is an application where heat from electricity is a desired outcome?

Answer 13

Electric clothes dryer
Iron
Space heater
Toaster

Question 14

Thermal electricity is heat generated by electricity

Answer 14

False

Question 15

A ___ is very common in gas appliances, such as water heaters.

Answer 15

Thermocouple

Question 16

Electricity created by stress or pressure in a material is called?

Answer 16

Piezoelectric

Question 17

Light has small particles of energy called photons.

Answer 17

True

Question 18

A photo cell is a device that operates on which photoelectric effect?

Answer 18

Photoconductive

Question 19

Incandescent lamps use poor conductors that become hot from ____ and glow red or even white hot.

Answer 19

Conducting current

Question 20

Which of the following is not a type of light producing device?

Answer 20

Photo- eye

Question 21

How many filaments are in a three-way light bulb?

Answer 21

2

Question 22

Which diagram correctly illustrates the correct polarity and current flow through the circuit?

Answer 22

D

Question 23

Under underwriting, a cable can cause the insulation for the cable to __?

Answer 23

Deteriorate

Question 24

The ____ of a conductor is the maximum current conductor can carry safely without exceeding its temperature rating?

Answer 24

Ampacity

Question 25

The NEC requires branch circuit conductors to have an ampacity greater than are equal to the non-continuous load plus ____ of the continuous load.

Answer 25

125%