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Fundamentals Midterm Written Practice Exam

Beschreibung

Early College Electrical Technology Quiz am Fundamentals Midterm Written Practice Exam, erstellt von Kris Salmons am 19/02/2018.
Kris Salmons
Quiz von Kris Salmons, aktualisiert more than 1 year ago
Kris Salmons
Erstellt von Kris Salmons vor etwa 6 Jahre
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Zusammenfassung der Ressource

Frage 1

Frage
The most commonly accepted theory regarding electricity says that an electric current is a flow of ___________ through a conductor.
Antworten
  • Protons
  • Electrons
  • Neutrons

Frage 2

Frage
The unit of measurement for: ... electrical current is [blank_start]Ampere[blank_end]. ... resistance against current flow is [blank_start]Ohm[blank_end]. ... electrical force, or pressure, is [blank_start]Volt[blank_end]. ... electrical power, or energy used, is [blank_start]Watt[blank_end].
Antworten
  • Ampere
  • Farad
  • Ohm
  • Volt
  • Henry
  • Watt
  • Hertz

Frage 3

Frage
All materials give at least some amount of resistance to the flow of electricity. However, the resistance given by some metals is very small and we say that these metals are good ______________.
Antworten
  • Insulators
  • Semiconductors
  • Conductors

Frage 4

Frage
There is a mathematical relationship between the voltage, the current, and the resistance in an electrical circuit. This relationship is called _____________'s Law.
Antworten
  • Lenz
  • Ohm
  • Tesla

Frage 5

Frage
Choose the correct prefix to make this statement true: 1,500,000 V = 1.5 ___ V.
Antworten
  • m
  • k
  • M
  • µ

Frage 6

Frage
Choose the correct prefix to make this statement true: 0.003 A = 3.0 ___A.
Antworten
  • m
  • k
  • M
  • µ

Frage 7

Frage
Choose the correct prefix to make this statement true: 2,200 Ω = 2.2 ___Ω.
Antworten
  • m
  • k
  • M
  • µ

Frage 8

Frage
Name the component represented by this schematic symbol shown.
Image:
Q9fig (binary/octet-stream)
Antworten
  • Battery
  • Fuse
  • Diode
  • Resistor

Frage 9

Frage
Name the component represented by the schematic symbol shown.
Image:
Q10fig (binary/octet-stream)
Antworten
  • Ground
  • Battery
  • Fuse
  • Resistor

Frage 10

Frage
Ohm's Law is: _________ = ____________ x _____________
Antworten
  • E = I x R
  • R = E x I
  • I = R x E

Frage 11

Frage
How many ohms are equal to 20 kΩ?
Antworten
  • 2,000
  • 20,000
  • 200,000
  • 2,000,000

Frage 12

Frage
Energy that is being stored for possible use is technically, or scientifically, known as _____________ energy.
Antworten
  • Potential
  • Kinetic
  • Quantum

Frage 13

Frage
In electricity, power in Watts is equal to current times _____________.
Antworten
  • Voltage
  • Resistance
  • Power

Frage 14

Frage
A series circuit has _____________ path(s) for current to follow.
Antworten
  • No
  • One
  • Many

Frage 15

Frage
If current is measured in two different parts of a series circuit, the two measurements will be _____________.
Antworten
  • Slightly different
  • The same
  • Very different

Frage 16

Frage
In a series circuit consisting of one voltage source and three resistors, the sum of all the voltage drops across the three resistors will be equal to ____________.
Antworten
  • 100 times the source voltage
  • The source voltage
  • 3 times the source voltage
  • Negative source voltage

Frage 17

Frage
In a series circuit consisting of one voltage source and three resistors, if the resistance of one of the resistors is increased, the voltage drop across it will _______________.
Antworten
  • Increase
  • Decrease
  • Stays the same

Frage 18

Frage
In a series circuit consisting of one voltage source and two resistors, if the values of the resistors are equal, we can assume that their voltage drops will be _______________.
Antworten
  • Different
  • The same
  • Unable to be determined from the information given

Frage 19

Frage
The metric value 16 mA can be expressed as _______________.
Antworten

Frage 20

Frage
86,000 expressed in scientific notation equals ____________.
Antworten

Frage 21

Frage
In engineering notation, 82,000 is expressed as shown.
Image:
Q22 (binary/octet-stream)
Antworten
  • True
  • False

Frage 22

Frage
Mega is what relation to kilo?
Antworten
  • 10 times
  • 100 times
  • 1000 times
  • 1,000,000 times

Frage 23

Frage
Scientific notation is the most widely used form of technical notation in electronics.
Antworten
  • True
  • False

Frage 24

Frage
The metric prefix µ is normally associated with ______________ measurements.
Antworten
  • extremely small
  • small
  • large
  • extremely large

Frage 25

Frage
Resistance is the opposition to electrical current.
Antworten
  • True
  • False

Frage 26

Frage
A 100 kΩ +/- 10% resistor is color coded ___________________.
Antworten
  • brown, green, black, gold
  • brown, black, yellow, silver
  • brown, black, yellow, gold
  • black, brown, yellow, silver

Frage 27

Frage
Which type of resistor is used for high-power applications?
Antworten
  • wire wound
  • carbon composition
  • surface mount
  • film

Frage 28

Frage
In the American Wire Gauge sizes, as the numerical value of AWG goes higher, the cross-sectional area of the wire _______________.
Antworten
  • goes higher
  • goes lower
  • stays the same

Frage 29

Frage
A 250 µA current flowing through a 4.7 kΩ resistor produces a _____________ voltage drop.
Antworten
  • 18.8 V
  • 53.2 V
  • 1.175 V
  • 1.175 mV

Frage 30

Frage
If 12 kΩ resistor carries the current of 12 mA, the resistor voltage drop is 1 V.
Antworten
  • True
  • False

Frage 31

Frage
Power rating for a resistor is mainly based on the physical size.
Antworten
  • True
  • False

Frage 32

Frage
If the voltage were suddenly switched on in the figure shown, ____________________.
Image:
Q33fig (binary/octet-stream)
Antworten
  • the current would be zero
  • the current would flow
  • the current would gradually decrease
  • the current would gradually decrease and then increase

Frage 33

Frage
If a 60 Ω resistor carries the current of 12 mA, what's the voltage drop?
Antworten
  • 0.72 volts
  • 7.2 volts
  • 720 volts
  • 72 volts

Frage 34

Frage
A 47 MΩ +/- 10% resistor is color coded ____________________.
Antworten
  • violet, blue, silver, gold
  • yellow, violet, blue, silver
  • yellow, violet, green, silver
  • yellow, violet, blue, gold

Frage 35

Frage
If a resistor of 2.2 MΩ is connected across a 1 kV source, current equals about ____________.
Antworten
  • 2.2 mA
  • 0.455 A
  • 45.5 µA
  • 0.455 mA

Frage 36

Frage
At constant voltage, resistance and current are ______________.
Antworten
  • directly proportional
  • similar to voltage
  • unrelated
  • inversely proportional

Frage 37

Frage
Which of the following terms is not a resistor rating?
Antworten
  • current
  • resistor tolerance
  • power rating
  • resistor value in ohms

Frage 38

Frage
If I = 27 mA and R = 4.7 Ω in the figure shown, the voltage equals _________________.
Image:
Q39fig (binary/octet-stream)
Antworten
  • 174 mV
  • 5.74 V
  • 127 mV
  • 7.8 V

Frage 39

Frage
If 12 V and 17 V sources are wired in series aiding, what is the total supply voltage?
Antworten
  • 29 V
  • 12 V
  • 17 V
  • 5 V

Frage 40

Frage
Three resistors are connected in series with a 60 V source. If VR1 = 19 V and VR2 = 14.3 V then what is the voltage drop across R3?
Antworten
  • 19 V
  • 26.7 V
  • 14.3 V
  • 45.7 V

Frage 41

Frage
A 15 kΩ +/- 5% resistor is color coded ___________.
Antworten
  • black, brown, yellow, silver
  • brown, black, yellow, silver
  • brown, black, yellow, gold
  • brown, green, orange, gold

Frage 42

Frage
If a 68 Ω, 33 Ω, 100 Ω, and 47 Ω resistor are connected in series with a 9 V battery supply, the current equals ____________.
Antworten
  • 327 mA
  • 22.3 mA
  • 36.3 mA
  • 27.6 A

Frage 43

Frage
If a 4.7 kΩ, a 5.6 kΩ, and a 10 kΩ resistor are in series, which resistor drops the most voltage?
Antworten
  • The 5.6 kΩ resistor
  • The 4.7 kΩ resistor
  • The 10 kΩ resistor
  • Cannot be determined from the given information

Frage 44

Frage
The voltage drop across any resistor or combination of resistors in a series circuit equals:
Antworten
  • the applied voltage across all resistors
  • the product of the circuit current times the resistance value
  • the ratio of the resistance values times the source voltage
  • all of the above

Frage 45

Frage
If 5 V and 16 V power supplies are connected in series aiding, what is the total voltage?
Antworten
  • 80 V
  • 16 V
  • 21 V
  • 24 V

Frage 46

Frage
If there is 100 mA of current flowing into a three-branch parallel circuit and two of the branch currents are 40 mA and 20 mA, the third branch current is _______________.
Antworten
  • 40 mA
  • 60 mA
  • 160 mA
  • 20 mA

Frage 47

Frage
If currents 5 A and 3 A enter a junction from two separate paths, how much current flows out of the junction?
Antworten
  • 8 A
  • 3 A
  • 2 A
  • 5 A

Frage 48

Frage
An open fault in one branch of a parallel circuit results in:
Antworten
  • increased circuit resistance
  • decreased power consumption
  • decreased current flow
  • all of these

Frage 49

Frage
If a 4.7 kΩ resistor and a 2.2 kΩ resistor are connected in parallel, the total resistance is ______________.
Antworten
  • 2200 Ω
  • 4700 Ω
  • greater than 2200 Ω
  • less than 2200 Ω

Frage 50

Frage
The total resistance of three parallel resistors equals the sum of the individual resistor values.
Antworten
  • True
  • False

Frage 51

Frage
Identify the rotary switch from the figure shown.
Image:
Q52fig (binary/octet-stream)
Antworten
  • (a)
  • (b)
  • (c)
  • (d)
  • (e)

Frage 52

Frage
Using the circuit shown, calculate the voltage drop across each resistor and the total circuit current. Round your answers to three significant figures.
Image:
Q53 (binary/octet-stream)
Antworten
  • 1.80
  • 3.24
  • 6.72
  • .012

Frage 53

Frage
Using the circuit in the figure shown, calculate each branch current, total circuit current, and the voltage drop across R3. Round your answers to three significant figures.
Image:
Q54fig (binary/octet-stream)
Antworten
  • .133
  • .074
  • .036
  • 20
  • .243
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