CHAPTER 15 Flashcards
(29 cards)
Arranged in circles, or shells, around the protons are:
Select one:
A.
Negative charges called neutrons
B.
Positive charges called protons
C.
Negative charges called protons
D.
Negative charges called electrons
E.
Positive charges called electrons
D.
Negative charges called electrons
An electric kettle is rated at 1000 watts and 230 volts. What is the current flowing through its element?
Select one:
A.
4.35 A
B.
5.50 A
C.
83.33 A
D.
10.43 A
E.
103.5 A
A.
4.35 A
The Canadian organization specializes in testing fuel-fired equipment is the:
Select one:
A.
NFPA
B.
ULC
C.
CGA
D.
CSA
E.
ASME
C.
CGA
In regards to electrical circuits a short circuit is:
Select one:
A.
A short cut for the electrons to ground
B.
A not to tall circuit
C.
The circuit in a closed space
D.
A circuit of minimum length
E.
The opposite of a long circuit
A.
A short cut for the electrons to ground
One type of over current device is the:
Select one:
A.
Fuse
B.
Motor
C.
Generator
D.
Switch
E.
Alternator
A.
Fuse
An electric kettle uses 850 watts for 30 minutes. What will this show on an electric meter?
Select one:
A.
2.52 kWh
B.
2.25 kWh
C.
0.425 kWh
D.
83.33 kWh
E.
10.43 kWh
C.
0.425 kWh
Power is measured in:
Select one:
A.
Volts
B.
Watts
C.
Amps
D.
Mhos
E.
Ohms
B.
Watts
Electrical energy is measured and billed for in:
Select one:
A.
Kilovolt hours (kVh)
B.
Kiloamp hours (kAh)
C.
Kilolitre hours (kLh)
D.
Kilowatt hours (kWh)
E.
Kilogram hours (kgh)
D.
Kilowatt hours (kWh)
Calculations for wattage are made by multiplying the:
Select one:
A.
Wattage by the amperage
B.
Voltage by the wattage
C.
Resistance by the amperage
D.
Voltage by the amperage
E.
Voltage by the resistance
D.
Voltage by the amperage
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 glare
B.
Light free from objectionable shadows
C.
The right kind of light
D.
Sufficient quantity of light
E.
Large coverage area
E.
Large coverage area
What causes a fluorescent light to flicker on & off accompanied by a shimmering effect during lighting periods?
Select one:
A.
Lamp life has been reached and needs to be replaced
B.
Wrong size light bulb
C.
Socket pins bent
D.
Low supply voltage
E.
Too high a current draw
A.
Lamp life has been reached and needs to be replaced
All matter is composed of tiny particles called:
Select one:
A.
Molecules
B.
Neutrons
C.
Protons
D.
Atoms
E.
Electrons
A.
Molecules
Any device that limits the number of amperes to a predetermined flow is called a/an:
Select one:
A.
Over current device
B.
Generator
C.
Motor
D.
Alternator
E.
Switch
A.
Over current device
An electric toaster has 9 amps flowing at 115 volts. What is the wattage?
Select one:
A.
550 W
B.
42 W
C.
110 W
D.
1035 W
E.
115 W
D.
1035 W
The device that compares the current leaving the electrical panel to that returning is the:
Select one:
A.
Wattmeter
B.
Circuit breaker
C.
Ground fault circuit interrupter
D.
Fuse
E.
Switch
C.
Ground fault circuit interrupter
Which of the following suggestions is not helpful in preventing excessively bad lighting conditions?
Select one:
A.
Always replace flashing fluorescent lamps as soon as possible otherwise flashing will destroy the starter
B.
Replace blackened or discolored lamps even though they may still be burning
C.
Replace lamps only when requested
D.
New lamps should be of the same wattage, type, colour, and voltage as the burned out lamps
E.
Where lights are in hard-to-reach locations replace all lamps when one needs replacement
C.
Replace lamps only when requested
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
An electric toaster is rated at 1200 watts and 115 volts. What is the current flowing through its element?
Select one:
A.
103.5 A
B.
4.35 A
C.
5.50 A
D.
10.43 A
E.
83.33 A
D.
10.43 A
Most house circuits and many appliances have a special grounding wire leading to the cold water piping system that serves the purpose of:
Select one:
A.
Completing the circuit
B.
Providing an alternate path for the current
C.
Returning the current to the source
D.
Supplying the current to the circuit
E.
Conducting any stray current to ground
E.
Conducting any stray current to ground
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.
Steel
B.
Aluminum
C.
Plastics
D.
Copper
E.
Gold
C.
Plastics
What is the lowest amount of electrical current that can cause death?
Select one:
A.
¾ amp
B.
¼ amp
C.
1 amp
D.
1/8 amp
E.
½ amp
B.
¼ amp
An electric kettle has 5 amps flowing at 110 volts. What is the wattage?
Select one:
A.
550 W
B.
42 W
C.
1035 W
D.
115 W
E.
110 W
A.
550 W
The following are all types of electric motors except:
Select one:
A.
Totally enclosed
B.
Dust proof
C.
Splash proof
D.
Open
E.
Drip proof
B.
Dust proof
A device called a transformer is used to change the electrical current from one _____ to another.
Select one:
A.
Resistance
B.
Amperage
C.
Voltage
D.
Wattage
E.
Value
C.
Voltage
