CPE 032

Question 1

An instrument that uses an LCD display typically capable of measuring voltage, current, and resistance.

Answer 1

Digital Multimeter (DMM)

Question 2

The pressure applied to the circuit, measured in volts.

Answer 2

Voltage (V)

Question 3

The flow of electricity through a conductor, measured in amperes.

Answer 3

Current (A)

Question 4

The opposition to the flow of current in a conductor, measured in ohms.

Answer 4

Resistance (Ω)

Question 5

A fundamental equation that relates voltage, current, and resistance in an electrical system, expressed as V = A x Ω.

Answer 5

Ohm’s Law

Question 6

An electric signal in which the current and voltage vary in a repeating pattern over time.

Answer 6

Alternating Current (AC)

Question 7

A steady electric current flowing in one direction, commonly stored in batteries.

Answer 7

Direct Current (DC)

Question 8

The impedance or resistance of the input jacks of a multimeter, affecting measurement results.

Answer 8

Input Impedance

Question 9

A device that measures AC or DC current without breaking the circuit by clamping around the conductor.

Answer 9

Clamp Meter

Question 10

The ability of a component to hold an electrical charge, usually stated in farads.

Answer 10

Capacitance

Question 11

A quick check to see if a circuit is complete, typically indicated by the meter’s tone.

Answer 11

Continuity

Question 12

A measure of the ‘Effective Value’ of an AC waveform, useful for calculating work done.

Answer 12

RMS (Root Mean Square)

Question 13

A feature in some multimeters that automatically selects the range with the best resolution for the measurement.

Answer 13

Auto Ranging

Question 14

A feature that retains the highest reading in a series of measurements.

Answer 14

Peak Hold

Question 15

The smallest increment of measurement that a multimeter can display.

Answer 15

Resolution

Question 16

Certifications that indicate a multimeter meets safety requirements for usage.

Answer 16

Safety Standards (UL, IEC)

Question 17

A meter that accurately measures AC voltage in environments with harmonics.

Answer 17

True RMS Meter

Question 18

A circuit configuration where devices are connected along a single path.

Answer 18

Series Circuit

Question 19

A circuit configuration where the same voltage is applied across multiple devices, with current flowing freely.

Answer 19

Parallel Circuit

Question 20

A semiconductor device that allows current to flow in only one direction.

Answer 20

Diode

Question 21

A unit of current equal to one-thousandth of an ampere.

Answer 21

Milliampere (mA)

Question 22

The basic unit of electric current.

Answer 22

Glossary Term: Ampere (A)

Question 23

The basic unit of resistance.

Answer 23

Glossary Term: Ohm (Ω)

Question 24

The unit of electrical pressure.

Answer 24

Glossary Term: Volt (V)

Question 25

A unit of frequency equal to one cycle per second.

Answer 25

Glossary Term: Hertz (Hz)

Question 26

The basic unit of capacitance; the ability to store electrical charge.

Answer 26

Glossary Term: Capacitance (F)

Question 27

The basic unit of electric current.

Answer 27

A, ampere or amp

Question 28

An electric signal in which the current and voltage vary in a repeating pattern over time; the most common type of voltage.

Answer 28

AC, alternating current

Question 29

A mechanical measuring device using a needle moving across a graduated scale or dial.

Answer 29

analog meter

Question 30

Auto-Power — Off Automatically shuts down unit after a certain amount of time to preserve battery life. Most meters with APO may be disabled or set to a certain amount of time before shutting off.

Answer 30

APO

Question 31

A DMM that automatically selects the range with the best resolution and accuracy in response to the sensed values.

Answer 31

auto ranging

Question 32

To adjust the meter measured value to a recognized artifact or standard.

Answer 32

calibration

Question 33

Ability of a component to hold an electrical charge, usually stated in microfarads.

Answer 33

capacitance

Question 34

Electronic component which stores energy and then discharges it rapidly; blocks DC and allows AC to pass through.

Answer 34

capacitor

Question 35

DMM with jaws that allow it to fit around a conductor to measure AC or DC current without breaking the circuit.

Answer 35

clamp-on —

Question 36

A connection between two conductors that allows a flow of current.

Answer 36

contact

Question 37

A continuous path for current flow in a closed circuit.

Answer 37

continuity

Question 38

The flow of an electrical charge through a conductor; measured in amperes or amps.

Answer 38

current

Question 39

Feature of a DMM that allows continued display of the last reading taken after probes have been removed.

Answer 39

data hold

Question 40

a direct, steady voltage; typically produced through electromagnetism, chemicals (batteries), light, heat or pressure.

Answer 40

DC, direct current

Question 41

Electronic device in circuits that allows current to flow easily in only one direction and blocks flow in the opposite direction.

Answer 41

diode

Question 42

An instrument that uses an LCD display typically capable of measuring voltage, current and resistance.

Answer 42

DMM, digital multimeter

Question 43

The basic unit of capacitance.

Answer 43

F, farad

Question 44

The number of cycles per second that a wave form repeats; measured in hertz. (Line voltage in the U.S. is 60 Hz.)

Answer 44

frequency

Question 45

A large conducting body (earth) used as a common return for fault current in a circuit.

Answer 45

ground

Question 46

One cycle per second; the unit of frequency.

Answer 46

H, hertz

Question 47

A signal with a frequency which is an integer multiple of the fundamental frequency (60Hz); may damage or degrade the performance of electrical devices.

Answer 47

harmonics

Question 48

Diminishes power quality; caused by non-linear loads such as variable speed motor drives, electronic lighting ballasts and computers.

Answer 48

harmonic distortion

Question 49

Total opposition to current flow; includes resistance, capacitance and reactance.

Answer 49

impedance

Question 50

Any device which consumes power in a circuit.

Answer 50

load

Question 51

DMM that requires the user to manually select the range, using the meter’s dial.

Answer 51

manual ranging

Question 52

Feature that allows a meter to capture and store the highest and lowest readings during a specific measurement.

Answer 52

min/max

Question 53

The basic unit of resistance, specified as equal to that of a conductor in which one amp of current is produced by one volt of potential across its terminals.

Answer 53

ohm

Question 54

Signal amplitudes or frequencies above the specified limits of the instrument; typically displayed as ―OL‖ on the display of a DMM.

Answer 54

OL, overload

Question 55

Feature of DMM that allows retention of highest reading in a series of measurements.

Answer 55

peak hold

Question 56

The positive or negative direction of DC voltage or current.

Answer 56

polarity

Question 57

Increments in value that can be displayed by a DMM; the greater the resolution the more precise the readout.

Answer 57

resolution

Question 58

Opposition to current; measured in ohms.

Answer 58

resistance

Question 59

Automatically shuts down unit not in use to preserve battery life.

Answer 59

Sleep mode

Question 60

Any connection that has relatively low resistance or any resistance between two points below a preselected threshold. Typically, this is unintended.

Answer 60

short

Question 61

DMM that has the True RMS feature, allowing for accurate measurement of AC voltage in environments with harmonics (see harmonics).

Answer 61

True RMS meter

Question 62

The unit of electrical pressure; one volt is the potential difference needed to cause one amp of current to pass through one Ohm of resistance.

Answer 62

V, volt

Question 63

SSI MSI LSI VLSI ULSI GSI

Answer 63

– Small Scale Integration – Medium Scale Integration – Large Scale Integration – Very Large Scale Integration – Ultra Large Scale Integration – Gigascale Integration

Question 64

is the portion of an electronic structure that protects an electronic/electrical element and its environment from each other.

Answer 64

electronic package

Question 65

is the bridge that interconnects the ICs and other components into a system-level board to form electronic products.

Answer 65

Packaging

Question 66

Function of Electronic package

Answer 66

Signal Distribution Power Distribution Heat Dissipation Circuit Support And Protection

Question 67

THT SMT DIP

Answer 67

Through Hole Technology Surface Mount Technology Dual in-line Package

Question 68

is an electronic device package with a rectangular housing and two parallel rows of electrical connecting pins.

Answer 68

Dual in-line Package (DIP)

Question 69

The pins are drawn in an L shape from both sides of the body, the materials include plastic and ceramic. In addition to being used for memory LSI, SOP is also widely used in circuits such as ASSP that is not too large. The pin pitch is 1.27mm and the number of pins is from 8 to 44.

Answer 69

SOP/SOIC/SO (Small Outline Package) SMT

Question 70

The leads are led out from four sides in an L-shape, the materials are ceramic, metal and plastic, among which, plastic packaging accounts for the vast majority. The pin pitches include 1.0mm, 0.8mm, 0.65mm, 0.5mm, 0.4mm, 0.3mm and other specifications. The maximum number of pins of 0.65mm package is 304.

Answer 70

QFP (Quad Flat Package) SMT

Question 71

LQFP

Answer 71

(Flat Quad Flat Pack): The height of the IC packaging body is 1.4 mm

Question 72

TQFP

Answer 72

(Thin Quad Flat Pack): Height is 1.0mm

Question 73

PQFP

Answer 73

(Plastic Quad Flat Package): PQFP package has a small pitch and a very small pin. Generally, large-scale or very large-scale integrated circuits use this IC packaging, and the pin count is generally above 100

Question 74

CQFP

Answer 74

(Ceramic Quare Flat Package): Ceramic version of PQFP

Question 75

BQFP

Answer 75

(Quad Flat Package with Bumper): This package has protrusions (cushions) at the four corners to prevent bending deformation of the pins during shipping. The pin pitch is 0.635mm, and the number of pins is from 84 to 196

Question 76

The four sides of this IC packaging are equipped with electrode contacts. Due to the absence of leads, the mounting area is smaller than QFP and the height is lower than QFP. The number of electrode contacts is generally from 14 to 100, the materials are ceramic and plastic. When there is an LCC mark, it is basically a ceramic QFN, of which the spacing of electrode contacts is 1.27 mm. Plastic QFN has different pin pitches of 0.65mm, 0.5mm, and 1.27mm, this package is also known as PLCC

Answer 76

QFN/LCC (Quad Flat Non-leaded Package) SMT

Question 77

Spherical bumps are formed on the back surface of the printed substrate to replace the lead, and the LSI chip is mounted on the front surface of the PCB board, and then sealed by a molding resin or a potting method, the pins can exceed 200. The package body can be made smaller than QFP and the BGA does not have to worry about pin deformation problems like QFP.

Answer 77

BGA (Ball Grid Array Package) SMT