Quiz

Question 1

Term used to refer to systems that combine computer controls,electrical components,and mechanical parts

Answer 1

Mechatronics

Question 2

Obtains relevant information from surrounding environment to manage or regulate the behavior of a device performing desired operations

Answer 2

Automatic Control Systems

Question 3

Automatic Control Systems generally consists of _________ to obtain information, a ___________ to make a decision and an ____________ to perform the actions that automate the operation

Answer 3

sensors, controller, actuator

Question 4

It is an integrated part that receives an electrical signal to create a physical movement to drive a mechanical device performing a certain action

Answer 4

Actuator

Question 5

Converts electric current to rotational motion

Answer 5

Electric motor

Question 6

Converts electric current to linear motion that opens or closes a valve

Answer 6

Solenoid valve

Question 7

Converts electric current to linear motion that extends or retracts piston

Answer 7

Electrohydraulic actuator

Question 8

Class of devices that measure significant parameters by using a variety of physical phenomena

Answer 8

Sensors

Question 9

Quantities in form of electrical variables (e.g. voltage, current) to represent measured physical quantities (e.g. temperature, pressure, light intensity), expressed in base-10 (decimal number system)

Answer 9

Analog data

Question 10

expressed in base-2 (binary number system), 0 or 1; off or on

Answer 10

Digital data

Question 11

Resolution of digital data depends on the number of __________, such that more __________ means more precision in the digitized measurement

Answer 11

bits

Question 12

Measure of the electric field’s potential, analogous to potential energy in gravitational field, sometimes referred to as “electromotive force” or emf

Answer 12

Voltage

Question 13

Defined as the time rate of flow of charge

Answer 13

Current

Question 14

Voltage source adds energy to the electrons causing them to flow from the ________ side towards the __________ side

Answer 14

negative, positive

Question 15

_________ side of the voltage source attracts the electrons, _________ side releases the electrons

Answer 15

Positive, negative

Question 16

Standard convention assumes that the current flows from the __________ side of the voltage source, opposite the flow of the electrons

Answer 16

positive

Question 17

Current describes the flow of ___________, not the electrons

Answer 17

positive charge

Question 18

Voltage and current in the circuit are constant (i.e. independent of time)

Answer 18

Direct current

Question 19

Voltage and current vary with time, usually sinusoidal

Answer 19

Alternating current

Question 20

It is a material property whose value is the slope of the resistor’s voltage-current curve

Answer 20

Resistance

Question 21

States that the electrical current flowing through a fixed linear resistance is directly proportional to the voltage applied across it, and also inversely proportional to the resistance

Answer 21

Ohm’s Law

Question 22

provides energy to the circuit

Answer 22

Voltage

Question 23

describes the flow of positive charge

Answer 23

Current

Question 24

consists of network of circuit elements that may dissipate or store energy

Answer 24

Load

Question 25

reference point in the circuit where voltage is assumed to be zero

Answer 25

Ground

Question 26

Dissipative element that converts electrical energy to into heat

Answer 26

Resistor

Question 27

For a 4-band resistor: the first two bands indicate _________, third band indicates _________,and the fourth band indicates ___________

Answer 27

digits, multiplier, tolerance

Question 28

For an ideal resistor, the voltage-current relationship is ________, and the resistance is ________

Answer 28

linear, constant

Question 29

A passive element that stores energy in the form of an electric field. This field is the result of a separation of electric charge.

Answer 29

Capacitor

Question 30

A passive energy storage element that stores energy in the form of a magnetic field

Answer 30

Inductor

Question 31

joules/coulomb

Answer 31

Volts

Question 32

coulomb/time

Answer 32

Current

Question 33

coulomb/volt

Answer 33

Capacitance (Farad)

Question 34

weber/ampere

Answer 34

Inductance (Henry)

Question 35

Code using symbols that refer to a number of items

Answer 35

Number system

Question 36

Uses the ten symbols (base 10 system)

Answer 36

Decimal number system

Question 37

Uses the two symbols (base 2 system)

Answer 37

Binary number system

Question 38

Numeric value of symbols in different positions

Answer 38

Place value

Question 39

number of digits in a binary number

Answer 39

Bits

Question 40

Uses the 8 symbols (base 8 system)

Answer 40

Octal number system

Question 41

Uses the 16 symbols (base 16 system)

Answer 41

Hexadecimal number system

Question 42

An element in a mechatronic or measurement system that detects the magnitude of a physical parameter and changes it into a signal that can be processed by the system

Answer 42

Sensor

Question 43

The active element of a sensor

Answer 43

Transducer

Question 44

Often referred to as resistive transducers or variable resistance transducers. Most frequently used for calculating different physical quantities like pressure, vibration, temperature, force, and displacement, which is characterized by changing resistance due to the effect of the environment

Answer 44

Resistive sensors

Question 45

Sensor resistance increases with increasing temperature

Answer 45

positive temperature coefficient

Question 46

Sensor resistance increases with decreasing temperature

Answer 46

negative temperature coefficient

Question 47

Sensor that has a resistive film sustained by a thin and flexible support. The entire structure is tightly attached to an object, and the deformation (tension and compression) of this object causes the deformation of the filament, in terms of length and cross section

Answer 47

Strain gauges

Question 48

Sensor used to measure force. Contains an internally flexural element, usually strain gauges. Usually connected to a bridge circuit to yield a voltage proportional to the load

Answer 48

Load cell

Question 49

Most straight forward resistive sensor

Answer 49

Potentiometers

Question 50

Also known as resistive photo detectors

Answer 50

Light-dependent resistors (LDR)

Question 51

Sensor exhibits a modification of material resistivity ρ caused by interaction with specific gases

Answer 51

Resistive gas sensors

Question 52

Sensors that can detect the nearness of a conductive material or a material with different dielectric property than the sensor’s electrodes

Answer 52

Capacitive sensors

Question 53

Convert light rays into electronic signals

Answer 53

Optical sensors

Question 54

Three common types of optical sensors

Answer 54

Through beam, Reflective, and Retro-reflective

Question 55

Sensors that transform change in temperature to current. Typical example is the thermocouple

Answer 55

Thermoelectric sensors

Question 56

It is the process of matching the output a sensor to a set of known reference values

Answer 56

Calibration of sensors

Question 57

Done by plotting two variables (dependent and independent) and generating a best fit line using n order polynomial equation. Can be implemented on spreadsheets

Answer 57

Polynomial method

Question 58

Difference between Maximum and Minimum value which can be sensed by the sensor

Answer 58

Range

Question 59

The smallest change which can be sensed by the sensor

Answer 59

Resolution

Question 60

Ratio of change in output to a unit change in the input

Answer 60

Sensitivity

Question 61

Difference between the Measured Value and True Value

Answer 61

Error

Question 62

It is inversely proportional to Error, i.e. How close the sensor reading is to the True Value

Answer 62

Accuracy

Question 63

Ability to give/reproduce accurate value repeatedly

Answer 63

Precision

Question 64

Time lag between the Input and Output

Answer 64

Response time

Question 65

Ratio between the magnitude of the signal and the noise at the output

Answer 65

Signal-to-noise ratio

Question 66

It should be compatible to use with a wide range of instruments

Answer 66

Interfacing

Question 67

Type of sensor with a temperature and humidity range of 0C- 50C and 20%-90%, respectively

Answer 67

DHT11

Question 68

Type of sensor with a temperature and humidity range of -40C- 80C and 0%-100%, respectively

Answer 68

DHT22