Book 3: 5-15 - "Introduction to Electricity" Flashcards
In regards to electrical circuits a short circuit is:
Select one:
A. A not to tall circuit
B. The opposite of a long circuit
C. A short cut for the electrons to ground
D. The circuit in a closed space
E. A circuit of minimum length
C. A short cut for the electrons to ground
What is the lowest amount of electrical current that can cause death?
Select one:
A. ¼ amp
B. ¾ amp
C. ½ amp
D. 1/8 amp
E. 1 amp
A. ¼ amp
Which of the following suggestions is not helpful in preventing excessively bad lighting conditions?
Select one:
A. New lamps should be of the same wattage, type, colour, and voltage as the burned out lamps
B. Where lights are in hard-to-reach locations replace all lamps when one needs replacement
C. Always replace flashing fluorescent lamps as soon as possible otherwise flashing will destroy the starter
D. Replace lamps only when requested
E. Replace blackened or discolored lamps even though they may still be burning
D. Replace lamps only when requested
An appliance is rated at 2000 watts and 24 volts. What is the current flowing through its element?
Select one:
A. 5.50 A
B. 103.5 A
C. 10.43 A
D. 83.33 A
E. 4.35 A
D. 83.33 A
[Amps = Watts / Volts]
A _____ is the smallest identifiable particle of a substance.
Select one:
A. Electron
B. Neutron
C. Molecule
D. Proton
E. Atom
C. Molecule
An electric kettle has 5 amps flowing at 110 volts. What is the wattage?
Select one:
A. 115 W
B. 110 W
C. 42 W
D. 1035 W
E. 550 W
E. 550 W
[Power (wattage) = voltage x amperes]
Calculations for wattage are made by multiplying the:
Select one:
A. Wattage by the amperage
B. Resistance by the amperage
C. Voltage by the resistance
D. Voltage by the wattage
E. Voltage by the amperage
E. Voltage by the amperage
An electric iron uses 1260 watts for 2 hours. What will this show on an electric meter?
Select one:
A. 10.43 kWh
B. 83.33 kWh
C. 0.425 kWh
D. 2.25 kWh
E. 2.52 kWh
E. 2.52 kWh
[ Energy(kWh) = power(wattage) x time(hours) ]
An electric toaster uses 1500 watts for 1½ hours. What will this show on an electric meter?
Select one:
A. 10.43 kWh
B. 2.25 kWh
C. 0.425 kWh
D. 2.52 kWh
E. 83.33 kWh
B. 2.25 kWh
[ Energy(kWh) = power(wattage) x time(hours) ]
A two-way wall switch controls lighting outlets at:
Select one:
A. Two different locations
B. A stairway
C. One location
D. Other out-of-the-way locations
E. Two entrances to a room
C. One location
The centre of the atom consists of an arrangement of:
Select one:
A. Protons carrying a positive charge
B. Protons carrying a negative charge
C. Neutrons carrying a negative charge
D. Electrons carrying a positive charge
E. Neutrons carrying a positive charge
A. Protons carrying a positive charge
Any device that limits the number of amperes to a predetermined flow is called a/an:
Select one:
A. Motor
B. Over current device
C. Alternator
D. Switch
E. Generator
B. Over current device
Each molecule, in turn, is made up of smaller particles called:
Select one:
A. Electrons
B. Protons
C. Atoms
D. Molecules
E. Neutrons
C. Atoms
An electric toaster has 9 amps flowing at 115 volts. What is the wattage?
Select one:
A. 42 W
B. 110 W
C. 1035 W
D. 115 W
E. 550 W
C. 1035 W
[ Power (wattage) = voltage x amps ]
One type of over current device is the:
Select one:
A. Alternator
B. Switch
C. Motor
D. Fuse
E. Generator
D. Fuse
The following are all types of electric motors except:
Select one:
A. Open
B. Drip proof
C. Splash proof
D. Dust proof
E. Totally enclosed
D. Dust proof
Which of the following is not one of the four important things that every good lighting system must provide?
Select one:
A. Light free from objectionable shadows
B. Large coverage area
C. Sufficient quantity of light
D. The right kind of light
E. Light free from glare
B. Large coverage area
Arranged in circles, or shells, around the protons are:
Select one:
A. Positive charges called protons
B. Negative charges called neutrons
C. Negative charges called protons
D. Positive charges called electrons
E. Negative charges called electrons
E. Negative charges called electrons
The Canadian organization specializes in testing fuel-fired equipment is the:
Select one:
A. ULC
B. CSA
C. NFPA
D. CGA
E. ASME
D. CGA
An electric toaster is rated at 1200 watts and 115 volts. What is the current flowing through its element?
Select one:
A. 10.43 A
B. 83.33 A
C. 103.5 A
D. 5.50 A
E. 4.35 A
A. 10.43 A
[ Amps = wattage / voltage ]
The device that compares the current leaving the electrical panel to that returning is the:
Select one:
A. Fuse
B. Circuit breaker
C. Ground fault circuit interrupter
D. Wattmeter
E. Switch
C. Ground fault circuit interrupter
Not all substances possess a free electron and do not have electron flow or current, they are called non-conductors or insulators such as:
Select one:
A. Gold
B. Plastics
C. Steel
D. Copper
E. Aluminum
B. Plastics
The Canadian organization that’s purpose is to eliminate or reduce fires started by faulty wiring and inferior electric products is the:
Select one:
A. ASME
B. ULC
C. UL
D. NFPA
E. CSA
B. ULC
What is the wattage when 3.5 amperes flow under a pressure of 12 volts?
Select one:
A. 42 W
B. 110 W
C. 1035 W
D. 550 W
E. 115 W
A. 42 W
