quiz 2 of process instrumentation

Question 1

What is the main characteristic of an ideal operational amplifier (op-amp)?

Answer 1

High input impedance

Question 2

Which of the following is an example of an active transducer?

Answer 2

Thermocouple

Question 3

What physical quantity does a piezoelectric sensor primarily measure?

Answer 3

Pressure

Question 4

What is the purpose of calibration?

Answer 4

Adjusting the instrument for accurate measurements

Question 5

What is the purpose of a voltage regulator in electronic circuits?

Answer 5

To stabilize the output voltage

Question 6

Which type of temperature sensor produces a voltage output proportional to the absolute temperature?

Answer 6

Thermocouple

Question 7

In electronic instrumentation, what is the purpose of signal conditioning?

Answer 7

-To amplify signals
-To filter noise
-To convert signals to digital form

Question 8

Why is calibration crucial in electronic instrumentation?

Answer 8

To ensure accurate and reliable measurements

Question 9

In electronic instrumentation, what are the primary considerations when choosing a communication interface for data transmission?

Answer 9

Data rate and noise immunity

Question 10

Which type of pressure gauge is commonly used in pneumatic systems to measure low pressures accurately?

Answer 10

Diaphragm pressure gauge

Question 11

What is the role of a pneumatic actuator in an automated system?

Answer 11

To produce mechanical motion

Question 12

How does a globe valve function in pneumatic control systems?

Answer 12

Controls fluid flow by adjusting a round disc perpendicular to the flow

Question 13

In pneumatic instrumentation, what is the function of a proportional controller?

Answer 13

Adjusts the flow of fluid based on a linear relationship with the error signal

Question 14

What physical quantity is commonly measured by a pneumatic transmitter?

Answer 14

Pressure

Question 15

What type of sensor is commonly used in pneumatic systems to detect the presence or absence of an object?

Answer 15

Proximity sensor

Question 16

What is the primary purpose of an air compressor in pneumatic systems?

Answer 16

To produce compressed air

Question 17

What is the basic function of a pneumatic logic gate in a pneumatic control system?

Answer 17

To perform logical operations on pneumatic signals

Question 18

In which industry is pneumatic instrumentation often used for various control and measurement applications?

Answer 18

Manufacturing and automation

Question 19

What is the purpose of a pneumatic pressure regulator in a pneumatic system?

Answer 19

To regulate the pressure of the compressed air

Question 20

Why are pneumatic filters essential in a pneumatic system?

Answer 20

To remove contaminants from the compressed air

Question 21

Instrument commonly used to measure and display electrical waveforms.

Answer 21

Oscilloscope

Question 22

What electronic component is often employed to convert a physical quantity into an electrical signal in a sensor?

Answer 22

Transducer

Question 23

Identify the electronic device characterized by high input impedance, low output impedance, and amplification capabilities.

Answer 23

Operational amplifier

Question 24

Identify the component responsible for storing electrical energy in an oscillator circuit.

Answer 24

Capacitor

Question 25

Name the type of temperature sensor that produces a voltage output proportional to the absolute temperature.

Answer 25

Thermocouple

Question 26

Identify the electronic device commonly used to amplify weak signals in communication systems.

Answer 26

Amplifier

Question 27

Name the process of converting an analog signal into a digital representation.

Answer 27

Analog-to-Digital conversion

Question 28

Instrument used to measure the electrical resistance of a circuit.

Answer 28

Ohmmeter

Question 29

What component controls the flow of current in a circuit?

Answer 29

Resistor

Question 30

It is a device in a pneumatic system that converts a variable signal into a proportional air pressure.

Answer 30

Pneumatic Transducer

Question 31

What type of valve is commonly used to control the rate of airflow in a pneumatic system?

Answer 31

Flow control valve

Question 32

What type of sensor is commonly used to measure the level of a liquid in a pneumatic system?

Answer 32

Float level sensor

Question 33

Device in a pneumatic system responsible for converting a pneumatic signal into an electrical signal.

Answer 33

Pneumatic-to-electric transducer

Question 34

It used to convert pneumatic signals into an analog electrical signal for further processing.

Answer 34

PI converter

Question 35

Component responsible for preventing excessive pressure in a pneumatic system

Answer 35

Pressure relief valve

Question 36

A temperature transmitter is calibrated to measure a temperature range of 20°C to 80°C, Calculate the temperature sensed by the transmitter if its output signal is 14 mA.

Answer 36

57.5 °C

Question 37

A pressure transducer has a calibrated range of 0 psi to 100 psi signal. Calculate the pressure sensed by the transducer if its output signal is 18 mA.

Answer 37

87.5 PSI

Question 38

A flow rate transmitter is calibrated to measure flow rates from 10 L/min to 50 L/min, alculate the flow rate sensed by the transmitter if its output signal is 15 mA.

Answer 38

37.5 L/min