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Process Instrumentation > quiz 2 of process instrumentation > Flashcards

quiz 2 of process instrumentation Flashcards

1
Q

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

A

High input impedance

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2
Q

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

A

Thermocouple

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3
Q

What physical quantity does a piezoelectric sensor primarily measure?

A

Pressure

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4
Q

What is the purpose of calibration?

A

Adjusting the instrument for accurate measurements

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5
Q

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

A

To stabilize the output voltage

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6
Q

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

A

Thermocouple

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7
Q

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

A

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

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8
Q

Why is calibration crucial in electronic instrumentation?

A

To ensure accurate and reliable measurements

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9
Q

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

A

Data rate and noise immunity

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10
Q

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

A

Diaphragm pressure gauge

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11
Q

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

A

To produce mechanical motion

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12
Q

How does a globe valve function in pneumatic control systems?

A

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

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13
Q

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

A

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

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14
Q

What physical quantity is commonly measured by a pneumatic transmitter?

A

Pressure

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15
Q

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

A

Proximity sensor

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16
Q

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

A

To produce compressed air

17
Q

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

A

To perform logical operations on pneumatic signals

18
Q

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

A

Manufacturing and automation

19
Q

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

A

To regulate the pressure of the compressed air

20
Q

Why are pneumatic filters essential in a pneumatic system?

A

To remove contaminants from the compressed air

21
Q

Instrument commonly used to measure and display electrical waveforms.

A

Oscilloscope

22
Q

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

A

Transducer

23
Q

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

A

Operational amplifier

24
Q

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

A

Capacitor

25
Q

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

A

Thermocouple

26
Q

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

A

Amplifier

27
Q

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

A

Analog-to-Digital conversion

28
Q

Instrument used to measure the electrical resistance of a circuit.

A

Ohmmeter

29
Q

What component controls the flow of current in a circuit?

A

Resistor

30
Q

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

A

Pneumatic Transducer

31
Q

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

A

Flow control valve

32
Q

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

A

Float level sensor

33
Q

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

A

Pneumatic-to-electric transducer

34
Q

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

A

PI converter

35
Q

Component responsible for preventing excessive pressure in a pneumatic system

A

Pressure relief valve

36
Q

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.

A

57.5 °C

37
Q

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.

A

87.5 PSI

38
Q

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.

A

37.5 L/min

Process Instrumentation (3 decks)

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