Book 3 Chapter 15: Introduction To Electricity

Question 1

What are the particles that make up a molecule referred to as?
A) Atoms
B) Neutrons
C) Protons
D) Electrons

Answer 1

A) Atoms

Question 2

An electric toaster has 9 amps flowing at 115 volts. What is the wattage?
A) 945 kW
B) 1.035 kW
C) 864.5 kW
D) 1.125 kW

Answer 2

B) 1.035 kW

Question 3

What amount of electrical current can cause death?
A) 200 milliamps
B) 300 milliamps
C) 250 milliamps
D) 150 milliamps

Answer 3

C) 250 milliamps

Question 4

What causes a fluorescent light to flicker on and off accompanied by a shimmering effect during lighting periods?
A) Low supply voltage
B) Too high a current draw
C) Wrong size lightbulb
D) Lamp life has been reached and needs to be replaced

Answer 4

D) Lamp life has been reached and needs to be replaced

Question 5

Which of the following are the common types of electric motor housings?
A) Open,drip proof housing
B) Splash-proof housing
C) Totally enclosed housing
D) All of the above

Answer 5

D) All of the above

Question 6

Which of the following agencies is not responsible for testing of appliances?
A) ASME
B) CSA
C) ULC
D) UL

Answer 6

A) ASME

Question 7

An open circuit is one in which:
A) The wire is bare
B) A switch is open
C) Voltage may exit
D) A switch is closed
E) The current flows through the resistance

Answer 7

B) A switch is open

Question 8

In accordance with the Electrical Code, circuits and appliances should be:
A) CGA approved
B) Connected to ground
C) Waterproof
D) NFPA approved
E) White

Answer 8

B) Connected to ground

Question 9

When an overload occurs on a system protected by a circuit breaker, the circuit breaker opens ___________ and must be closed ____________.
A) By itself, remotely
B) Manually, by itself
C) By itself, by itself
D) By itself, manually
E) Manually, manually

Answer 9

D) By itself, manually

Question 10

When a person receives an electrical shock, this shock can be lethal because of:
A) Current
B) Length of time the shock lasts
C) Resistance
D) Voltage
E) Ungrounded appliance

Answer 10

A) Current

Question 11

All receptacles that are outdoors, in bathrooms or supply power to water fed appliances are required to be protected by a/an:
A) Trap
B) GFI
C) Emergency stop
D) Fuse
E) Circuit breaker

Answer 11

B) GFI

Question 12

The buildup of electrical pressure on an object which does not flow is called:
A) Static electricity
B) Corporeal electricity
C) Metaphysical electricity
D) Juminal electricity
E) Dynamic electricity

Answer 12

A) Static electricity

Question 13

What is the wattage in an electrical circuit when 5 amps of current flow under a pressure of 24 volts?
A) 0.2083 watts
B) 240 watts
C) 4.8 watts
D) 120 watts
E) 90 watts

Answer 13

D) 120 watts

Question 14

An electric grinder uses 45 watts for 3 hours. How much energy will show on an electric meter?
A) 1500 kWh
B) 0.135 kWh
C) 15 kWh
D) 0.07 kWh
E) 1350 kWh

Answer 14

B) 0.135 kWh

Question 15

The flow of electrons in a uniform direction is called?
A) Voltage drop
B) Direct current
C) Electrical current flow
D) Potential difference
E) Electromotive force

Answer 15

C) Electrical current flow

Question 16

Rubber, glass, plastic, and ceramics are examples of:
A) Convectors
B) Conductors
C) Neutrons
D) Circuits
E) Insulators

Answer 16

E) Insulators

Question 17

The white wire back to the generator in an electrical circuit is known as a ____________ wire.
A) Neutral
B) Hot
C) Cold
D) Brown
E) Black

Answer 17

A) Neutral

Question 18

A continuous, unbroken path from a current-producing device to a current-consuming device and back again to the current-producing source is a:
A) Circle
B) Generator
C) Ring
D) Route
E) Circuit

Answer 18

E) Circuit

Question 19

A device which has a primary and secondary winding, which is used to either step down or step up voltage in a circuit, is called a:
A) Switch
B) Circuit breaker
C) Transformer
D) Fuse
E) Wall receptacle

Answer 19

C) Transformer

Question 20

The most basic safety device used to prevent damage to electrical equipment and supply systems is the:
A) Circuit breaker
B) Resistor
C) Ground wire
D) Switch
E) Fuse

Answer 20

E) Fuse

Question 21

If the power dissipated by a resistor is 1.2 kW when supplied with 110 volts, the amperage will be _____ amperes.
A) 10.909
B) 19.006
C) 132
D) 1320
E) 91.666

Answer 21

A) 10.909

Question 22

The reduction in voltage across a resistor or load in an electrical circuit is known as the:
A) Wattage
B) Voltage drop
C) Conductive loss
D) Amperage draw
E) Resistance

Answer 22

B) Voltage drop

Question 23

In fluorescent lighting systems, starting the light frequently may cause:
A) Blinking of the lamps
B) Colour and brightness differences within the lamp
C) Blackening at the end of the lamps
D) The ends of the lamps to stay lit
E) Short lamp life

Answer 23

E) Short lamp life

Question 24

A material that will not carry an electrical current is called a/an:
A) Circuit
B) Switch
C) Ampere
D) Conductor
E) Insulator

Answer 24

E) Insulator

Question 25

Negatively charged particles rotating about the center of an atom are called? A) Protons B) Molecules C) Neutrons D) Electrons E) Shell

Answer 25

D) Electrons

Question 26

To avoid fake or unsafe electrical equipment, you should ensure it is certified by: A) CSA B) CBC C) ASA D) AMA

Answer 26

A) CSA

Question 27

What causes a fluorescent light to flicker on & off accompanied by a shimmering effect during lighting periods? A) Lamp life has been reached and needs to be replaced B) Socket pins bent C) Wrong size light bulb D) Too high a current draw E) Low supply voltage

Answer 27

A) Lamp life has been reached and needs to be replaced

Question 28

Arranged in circles, or shells, around the protons are: A) Negative charges called electrons B) Negative charges called neutrons C) Positive charges called electrons D) Negative charges called protons E) Positive charges called protons

Answer 28

A) Negative charges called electrons

Question 29

Most house circuits and may appliances have a special grounding wire leading to the cold water piping system that serves the purpose of: A) Returning the current to the source B) Providing an alternate path for the current C) Completing the circuit D) Supplying the current to the circuit E) Conducting any stray current to ground

Answer 29

E) Conducting any stray current to ground

Question 30

An electric toaster has 9 amps flowing at 115 volts. What is the wattage? A) 1035 W B) 550 W C) 42 W D) 115 W E) 110 W

Answer 30

A) 1035 W

Question 31

What is the lowest amount of electrical current that can cause death? A) 1/8 amp B) 3/4 amp C) 1 amp D) 1/4 amp E) 1/2 amp

Answer 31

D) 1/4 amp

Question 32

Each molecule, in turn, is made up of smaller particles called: A) Protons B) Molecules C) Atoms D) Neutrons E) Electrons

Answer 32

C) Atoms

Question 33

Electrical energy is measured and billed for in: A) Kilolitre hours (kLh) B) Kilowatt hours (kWh) C) Kiloamp hours (kAh) D) Kilovolt hours (kVh) E) Kilogram hours (kgh)

Answer 33

B) Kilowatt hours (kWh)

Question 34

All matter is composed of tiny particles called: A) Electrons B) Neutrons C) Protons D) Molecules E) Atoms

Answer 34

D) Molecules

Question 35

Manufacturers are not allowed to offer their electrical motors for safe unless the appliances have been labeled by the: A) NFPA B) ASME C) ULC D) UL E) CSA

Answer 35

E) CSA

Question 36

One type of overcurrent device is the: A) Switch B) Motor C) Generator D) Alternator E) Fuse

Answer 36

E) Fuse