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Fundamentals Midterm Written Practice Exam

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Early College Electrical Technology Quiz on Fundamentals Midterm Written Practice Exam, created by Kris Salmons on 19/02/2018.
Kris Salmons
Quiz by Kris Salmons, updated more than 1 year ago
Kris Salmons
Created by Kris Salmons almost 7 years ago
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Resource summary

Question 1

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

Question 2

Question
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].
Answer
  • Ampere
  • Farad
  • Ohm
  • Volt
  • Henry
  • Watt
  • Hertz

Question 3

Question
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 ______________.
Answer
  • Insulators
  • Semiconductors
  • Conductors

Question 4

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

Question 5

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

Question 6

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

Question 7

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

Question 8

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

Question 9

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

Question 10

Question
Ohm's Law is: _________ = ____________ x _____________
Answer
  • E = I x R
  • R = E x I
  • I = R x E

Question 11

Question
How many ohms are equal to 20 kΩ?
Answer
  • 2,000
  • 20,000
  • 200,000
  • 2,000,000

Question 12

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

Question 13

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

Question 14

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

Question 15

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

Question 16

Question
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 ____________.
Answer
  • 100 times the source voltage
  • The source voltage
  • 3 times the source voltage
  • Negative source voltage

Question 17

Question
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 _______________.
Answer
  • Increase
  • Decrease
  • Stays the same

Question 18

Question
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 _______________.
Answer
  • Different
  • The same
  • Unable to be determined from the information given

Question 19

Question
The metric value 16 mA can be expressed as _______________.
Answer

Question 20

Question
86,000 expressed in scientific notation equals ____________.
Answer

Question 21

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

Question 22

Question
Mega is what relation to kilo?
Answer
  • 10 times
  • 100 times
  • 1000 times
  • 1,000,000 times

Question 23

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

Question 24

Question
The metric prefix µ is normally associated with ______________ measurements.
Answer
  • extremely small
  • small
  • large
  • extremely large

Question 25

Question
Resistance is the opposition to electrical current.
Answer
  • True
  • False

Question 26

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

Question 27

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

Question 28

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

Question 29

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

Question 30

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

Question 31

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

Question 32

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

Question 33

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

Question 34

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

Question 35

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

Question 36

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

Question 37

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

Question 38

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

Question 39

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

Question 40

Question
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?
Answer
  • 19 V
  • 26.7 V
  • 14.3 V
  • 45.7 V

Question 41

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

Question 42

Question
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 ____________.
Answer
  • 327 mA
  • 22.3 mA
  • 36.3 mA
  • 27.6 A

Question 43

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

Question 44

Question
The voltage drop across any resistor or combination of resistors in a series circuit equals:
Answer
  • 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

Question 45

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

Question 46

Question
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 _______________.
Answer
  • 40 mA
  • 60 mA
  • 160 mA
  • 20 mA

Question 47

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

Question 48

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

Question 49

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

Question 50

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

Question 51

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

Question 52

Question
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)
Answer
  • 1.80
  • 3.24
  • 6.72
  • .012

Question 53

Question
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)
Answer
  • .133
  • .074
  • .036
  • 20
  • .243
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