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5th Class Power Engineering > Book 3 Chapter 15: Introduction To Electricity > Flashcards

Book 3 Chapter 15: Introduction To Electricity Flashcards

1
Q

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

A

A) Atoms

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2
Q

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

A

B) 1.035 kW

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3
Q

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

A

C) 250 milliamps

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4
Q

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

A

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

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5
Q

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

A

D) All of the above

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6
Q

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

A

A) ASME

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7
Q

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

A

B) A switch is open

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8
Q

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

A

B) Connected to ground

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9
Q

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

A

D) By itself, manually

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10
Q

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

A

A) Current

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11
Q

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

A

B) GFI

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12
Q

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

A

A) Static electricity

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13
Q

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

A

D) 120 watts

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14
Q

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

A

B) 0.135 kWh

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15
Q

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

A

C) Electrical current flow

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16
Q

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

A

E) Insulators

17
Q

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

A

A) Neutral

18
Q

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

A

E) Circuit

19
Q

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

A

C) Transformer

20
Q

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

A

E) Fuse

21
Q

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

A

A) 10.909

22
Q

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

A

B) Voltage drop

23
Q

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

A

E) Short lamp life

24
Q

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

A

E) Insulator

25
Q

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

A

D) Electrons

26
Q

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

A

A) CSA

27
Q

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

A

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

28
Q

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

A

A) Negative charges called electrons

29
Q

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

A

E) Conducting any stray current to ground

30
Q

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

A

A) 1035 W

31
Q

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

A

D) 1/4 amp

32
Q

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

A

C) Atoms

33
Q

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)

A

B) Kilowatt hours (kWh)

34
Q

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

A

D) Molecules

35
Q

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

A

E) CSA

36
Q

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

A

E) Fuse

5th Class Power Engineering (75 decks)

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