quiz 2 of process instrumentation Flashcards
What is the main characteristic of an ideal operational amplifier (op-amp)?
High input impedance
Which of the following is an example of an active transducer?
Thermocouple
What physical quantity does a piezoelectric sensor primarily measure?
Pressure
What is the purpose of calibration?
Adjusting the instrument for accurate measurements
What is the purpose of a voltage regulator in electronic circuits?
To stabilize the output voltage
Which type of temperature sensor produces a voltage output proportional to the absolute temperature?
Thermocouple
In electronic instrumentation, what is the purpose of signal conditioning?
-To amplify signals
-To filter noise
-To convert signals to digital form
Why is calibration crucial in electronic instrumentation?
To ensure accurate and reliable measurements
In electronic instrumentation, what are the primary considerations when choosing a communication interface for data transmission?
Data rate and noise immunity
Which type of pressure gauge is commonly used in pneumatic systems to measure low pressures accurately?
Diaphragm pressure gauge
What is the role of a pneumatic actuator in an automated system?
To produce mechanical motion
How does a globe valve function in pneumatic control systems?
Controls fluid flow by adjusting a round disc perpendicular to the flow
In pneumatic instrumentation, what is the function of a proportional controller?
Adjusts the flow of fluid based on a linear relationship with the error signal
What physical quantity is commonly measured by a pneumatic transmitter?
Pressure
What type of sensor is commonly used in pneumatic systems to detect the presence or absence of an object?
Proximity sensor
What is the primary purpose of an air compressor in pneumatic systems?
To produce compressed air
What is the basic function of a pneumatic logic gate in a pneumatic control system?
To perform logical operations on pneumatic signals
In which industry is pneumatic instrumentation often used for various control and measurement applications?
Manufacturing and automation
What is the purpose of a pneumatic pressure regulator in a pneumatic system?
To regulate the pressure of the compressed air
Why are pneumatic filters essential in a pneumatic system?
To remove contaminants from the compressed air
Instrument commonly used to measure and display electrical waveforms.
Oscilloscope
What electronic component is often employed to convert a physical quantity into an electrical signal in a sensor?
Transducer
Identify the electronic device characterized by high input impedance, low output impedance, and amplification capabilities.
Operational amplifier
Identify the component responsible for storing electrical energy in an oscillator circuit.
Capacitor
Name the type of temperature sensor that produces a voltage output proportional to the absolute temperature.
Thermocouple
Identify the electronic device commonly used to amplify weak signals in communication systems.
Amplifier
Name the process of converting an analog signal into a digital representation.
Analog-to-Digital conversion
Instrument used to measure the electrical resistance of a circuit.
Ohmmeter
What component controls the flow of current in a circuit?
Resistor
It is a device in a pneumatic system that converts a variable signal into a proportional air pressure.
Pneumatic Transducer
What type of valve is commonly used to control the rate of airflow in a pneumatic system?
Flow control valve
What type of sensor is commonly used to measure the level of a liquid in a pneumatic system?
Float level sensor
Device in a pneumatic system responsible for converting a pneumatic signal into an electrical signal.
Pneumatic-to-electric transducer
It used to convert pneumatic signals into an analog electrical signal for further processing.
PI converter
Component responsible for preventing excessive pressure in a pneumatic system
Pressure relief valve
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.
57.5 °C
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.
87.5 PSI
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.
37.5 L/min
