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1.
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If the source voltage is lower than normal, the current will be lower than
normal.
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2.
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Power is equal to voltage multiplied by resistance.
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3.
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Electric energy used in homes is measured using:
a. | an ohmmeter. | c. | a kilowatthour meter. | b. | a
voltmeter. | d. | an
ammeter. |
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4.
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If 10 V is applied, in turn, to a 50-W resistor and a
100-W resistor, the current flow will be:
a. | the same through both resistors. | c. | directly proportional to the
resistance. | b. | greater through the 50-W resistor. | d. | greater through the 100-W resistor. |
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5.
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Which of the following is classified as a protective device?
a. | a pushbutton | c. | a circuit breaker | b. | a fuse | d. | both b and c |
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6.
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The symbol used to represent current is:
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7.
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The unit of measurement for the difference of potential between two points
is:
a. | the volt. | c. | the ampere. | b. | the ohm | d. | the PD. |
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8.
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An electric toaster is rated for 120 V and 10 A. Its power rating would
be:
a. | 1200 W. | c. | 1200 Wh. | b. | 1200 kWh. | d. | 1200 J. |
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9.
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Electrical conductors:
a. | have high resistance. | b. | use most of the energy available from the
source. | c. | complete the electron path from the source to the load. | d. | all of
these |
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10.
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Which of the following is an example of a load?
a. | an electrical wall outlet | c. | a hair dryer | b. | an extension
cord | d. | a
pushbutton |
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11.
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Apprentice A says that when taking measurements with a voltmeter and an ammeter,
the meters are both connected into the circuit in the same way. Apprentice B says the voltmeter
is connected in series and the ammeter is connected in parallel. Who is correct?
a. | Apprentice A only | c. | both Apprentice A and Apprentice B | b. | Apprentice B
only | d. | neither Apprentice A
nor Apprentice B |
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12.
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The ohmmeter is an instrument used to measure:
a. | voltage. | c. | current. | b. | resistance. | d. | energy. |
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13.
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Which of the following is an example of a voltage source?
a. | a battery | c. | a light bulb | b. | a switch | d. | copper wire
conductors |
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14.
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If the resistance of a circuit is higher than normal and the voltage is normal,
the current will be lower than normal.
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15.
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The force that causes the flow of electrons through a conductor is known
as:
a. | the resistance | c. | the current. | b. | the power. | d. | the voltage. |
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16.
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Other factors remaining constant, what would the effect on current flow be in a
given circuit if the applied voltage were doubled?
a. | it would be divided by two | c. | it would be divided by
four | b. | it would double | d. | it would remain the same |
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17.
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The coulomb is a unit of electrical charge.
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18.
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One ampere is equivalent to:
a. | one coulomb per second. | c. | one joule per
minute. | b. | one ohm per second. | d. | one joule per second. |
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19.
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An ohmmeter is the instrument used to measure current flow.
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20.
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Electric energy can be measured in:
a. | kilowatthours. | c. | watthours. | b. | joules. | d. | all of these |
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21.
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Voltage exists between two points and does not flow through a circuit as current
does.
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22.
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In a basic electrical circuit, the part that stores electric energy or changes
it into other forms is:
a. | the conductor(s). | c. | the load. | b. | the switch. | d. | the source. |
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23.
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A switch would be classified as:
a. | a load device. | c. | a protective device. | b. | a control device. | d. | a voltage
source. |
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24.
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The faster a lamp converts electric energy to light, the brighter the lamp and
the lower the wattage rating.
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25.
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Electron flow is based on the electron theory of matter and, therefore,
indicates the flow of current from negative to positive.
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26.
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Conventional current flow is opposite in direction to electron flow.
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27.
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Energy measurements are used in calculating the cost of electric energy.
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28.
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An electric dryer rated for 3000 W is operated for 5 hours. The amount of
energy used or converted is:
a. | 5 Wh. | c. | 5 kWh. | b. | 15,000 Wh. | d. | 15,000,000 kWh. |
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29.
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According to Ohm’s law current is equal to:
a. | Voltage divided by Resistance | c. | Voltage plus
Resistance | b. | Voltage minus Resistance | d. | Voltage multiplied by Resistance |
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30.
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Resistance is electrical pressure that causes electron flow in a circuit.
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31.
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The resistance of a conductor causes heat in the conductor when a current flows
through it.
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