Deck 32: Review of Electrical and Electronics Fundamentals

Question 1

Which of the following was a direct result of Benjamin Franklin' famous kite experiment?

A) discovery of static electricity
B) electron theory
C) conventional theory
D) lead acid battery

Answer 1

conventional theory

Question 2

Current flow is measured in:

A) amperes
B) watts
C) volts
D) ohms

Answer 2

amperes

Question 3

What is another way of saying charge differential?

A) resistance
B) current flow
C) voltage
D) wattage

Answer 3

voltage

Question 4

Resistance to current flow through a circuit is measured in:

A) watts
B) ohms
C) volts
D) amps

Question 5

Materials that inhibit the flow of electrons are known as:

A) capacitors
B) shells
C) insulators
D) conductors

Question 6

What is an atom with a deficit of electrons known as?

A) valance
B) ion
C) semiconductor
D) balanced

Question 7

Which of the following materials in NOT an insulator?

A) copper
B) rubber
C) glass
D) plastic

Question 8

Voltage is a measure of:

A) reluctance
B) resistance
C) potential difference
D) wattage

Question 9

What is resistance to the movement of magnetic lines of force known as?

A) flux density
B) reluctance
C) capacitance
D) magnetomotive force

Question 10

What is the correct term used to describe the positive terminal on a battery?

A) hot
B) live
C) cathode
D) anode

Question 11

What is the correct term used to describe the negative terminal on a battery?

A) cathode
B) anode
C) electrically neutral
D) dead

Question 12

Which of the following is NOT true of magnetic fields?

A) unlike poles attract
B) flux lines exit from the north pole
C) flux lines enter the south pole
D) flux density is lowest at the poles

Question 13

What is electromagnetic field force measured in?

A) flux density
B) magnetomotive force
C) applied voltage
D) lines of magnetic force

Question 14

Which of the following means the same thing as magnetomotive force?

A) flux density
B) ampere-turns
C) flux cycles
D) capacitance

Question 15

When current flow is created by moving a conductor through a magnetic field, it is known as:

A) thermoelectricity
B) photoelectricity
C) piezoelectricity
D) electromagnetic induction

Question 16

Which of the following is true of a lead acid battery?

A) produces DC chemically
B) produces AC chemically
C) induces DC
D) induces AC

Question 17

When a substance becomes electrified due to the application of pressure, what is the electrical principle known as?

A) induction
B) capacitance
C) piezoelectricity
D) thermoelectricity

Question 18

Who discovered the relationship between electrical potential, current flow, and resistance in an electrical circuit?

A) Ohm
B) Volta
C) Watt
D) Franklin

Question 19

A circuit in which there is only one path for current flow is known as:

A) parallel circuit
B) series circuit
C) energized circuit
D) series-parallel circuit

Question 20

Using the Ohm's law formula, how is amperage calculated?

A) voltage multiplied by resistance
B) voltage divided by current
C) resistance divided by voltage
D) voltage divided by resistance

Question 21

Which of the following describes an open circuit?

A) energized
B) switched on
C) closed
D) no current flow

Question 22

Which of the following describes a closed circuit?

A) energized
B) no current flow
C) switched off
D) open

Question 23

What happens to current flow in a series circuit if an additional load (resistance) is added?

A) it remains the same
B) it decreases
C) it increases
D) it ceases

Question 24

What happens to current flow in a parallel circuit if an additional path for current flow is added to the circuit?

A) it remains the same
B) it decreases
C) it increases
D) it ceases

Question 25

What will happen to the resistance of copper wire when it heats up?

A) remains the same
B) it decreases
C) it increases
D) permits greater current flow

Question 26

The sum of the voltage drops in an energized electrical circuit:

A) must equal source voltage
B) equals the rate of accomplishing work
C) equals the total power consumed
D) must be equivalent to amperage

Question 27

Which of the following is a common use of a capacitor on a truck electrical system?

A) temperature sensor
B) spike suppressor in digital circuit
C) GPS transponder
D) stepper transformer

Question 28

If the primary coil is energized in a transformer, what happens in the secondary coil if it is connected into a closed circuit?

A) nothing until it too is powered up
B) current flow is induced
C) nothing until the secondary circuit is open
D) nothing until primary coil de-energizes

Question 29

Which of the following is true of a semiconductor?

A) four electrons in outer shell
B) less than four electrons in outer shell
C) more than four electrons in outer shell
D) four electrons in inner shell

Question 30

In the words cathode and anode, what does ode mean?

A) positive
B) negative
C) terminal
D) resistance

Question 31

When a diode is in reverse bias, what does it do?

A) allows current flow in both directions
B) permits DC current flow only
C) switches AC to DC
D) blocks current flow

Question 32

A diode that is designed to block reverse bias current but only up to a specified voltage is known as?

A) blocking diode
B) photo diode
C) zener diode
D) small signal diode

Question 33

How many terminals does a transistor have?

A) one
B) two
C) three
D) four

Question 34

What type of transistor is often used as a driver switch in a circuit such as a truck ECM injector driver unit?

A) field effect transformer
B) small signal switching
C) MOSFET
D) power transistor

Question 35

When the emitter of one transistor is used to supply the base signal to a second transistor in a vehicle computer amplification circuit, the arrangement is known as:

A) Darlington pair
B) silicon controlled rectifier
C) siamese relay
D) thyristor

Question 36

In which of the following types of defective electrical circuits would you expect to measure the most current flow?

A) open circuit
B) high resistance circuit
C) short circuit
D) burned out load device

Question 37

A diode that tests showing high resistance in both directions is:

A) functioning properly
B) shorted
C) closed
D) open

Question 38

Using the binary system, if 0 = 0000 0000 and 1= 0000 0001, what does 0000 0100 equal?

A) 100
B) 4
C) 3
D) 2

Question 39

Which of the following is NOT an advantage of an LED over a light bulb element?

A) converts light directly to electricity
B) has no heat losses
C) produces more light with less current
D) longer service life

Question 40

When coils are used in the injector driver units in truck ECMs, which of the following best describes their role?

A) isolation transformers
B) ignition coils
C) step-down transformers
D) step-up transformers

Question 41

In a DC, 12 volt circuit supplying a single lightbulb, voltage drop across the load is measured at fractionally under 12 volts. When a second identically rated bulb is wired in series with this circuit, approximately how much voltage should dropped across each bulb?

A) 24 volts
B) 12 volts
C) 6 volts
D) 4 volts

Question 42

What happens to current flow if an electrical circuit is shorted?

A) it ceases
B) drops to nearly zero
C) divides between circuit and short path
D) increases

Question 43

What electrical principle is used to make a diesel engine exhaust system pyrometer function?

A) piezoelectric
B) thermoelectric
C) galvanic
D) photoelectric

Question 44

In the electron theory of electrical flow, which of the following is true?

A) electrons flow from positive to ground
B) electrons flow from negative to ground
C) electrons flow from negative to positive
D) electrons flow from anode to cathode

Question 45

Technician A says that piezoelectric effect is reversible. Technician B says that piezo actuators respond more slowly to inputs because they are required to build a magnetic field before a mechanical response results. Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 46

Technician A says that fiber optic technology has the potential to replace copper wires as electrical conductors. Technician B says that fiber optics have the potential to be used more extensively as communication buses in vehicles. Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B