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WorksheetsAdvanced Instrumentation and Control Quiz 2
Total questions: 50
Worksheet time: 8mins
The typical basic structure of an instrumentation amplifier uses:
A. One op-amp
B. Two op-amps
C. Three op-amps
D. Four op-amps
Instrumentation amplifiers are widely used in biomedical equipment such as:
A. ECG machines
B. Radios
C. Televisions
D. Speakers
Which amplifier protects low-level circuits from high-voltage sources?
A. Audio amplifier
B. Power amplifier
C. Buffer amplifier
D. Isolation amplifier
Which filtering technique removes high-frequency noise?
A. Low-pass filter
B. High-pass filter
C. Band-stop filter
D. Notch filter
Which method reduces noise by canceling unwanted signals?
A. Shielding
B. Differential signaling
C. Filtering
D. Grounding
In analog filters, components commonly used include
A. resistors, capacitors, inductors
B. flip-flops and counters
C. microprocessors
D. memory chips
The frequency response of a filter describes the relationship between
A. time and amplitude
B. input impedance and output impedance
C. input and output amplitudes versus frequency
D. voltage and current
Digital filters require which of the following as input?
A. Continuous voltage
B. Magnetic flux
C. Mechanical displacement
D. Sampled data
For an 8-bit DAC with a 5 V reference, the step size is approximately
A. 0.039 V
B. 0.0195 V
C. 0.078 V
D. 0.156 V
Which ADC type is commonly used in digital multimeters?
A. Flash ADC
B. Successive approximation ADC
C. Dual-slope ADC
D. Pipeline ADC
In a DAQ system, sensors are used to
A. Measure physical quantities
B. Process digital data
C. Display results
D. Store information
The input range of a DAQ system defines
A. The number of samples stored
B. The allowable signal frequency
C. The minimum detectable signal
D. The maximum and minimum input voltage
Which factor increases quantization levels in an ADC?
A. Lower bit depth
B. Higher bit depth
C. Lower sampling rate
D. Narrow bandwidth
Which MATLAB tool is used for data visualization?
A. Simulink
B. Plotting functions
C. Compiler toolbox
D. Debugger
Virtual instrumentation systems usually consist of
A. Only software
B. Only hardware
C. Hardware, software, and a user interface
D. Mechanical tools
Isolation amplifiers are commonly used in:
A. High-voltage measurements
B. Audio mixing
C. RF circuits
D. Oscillators
Instrumentation amplifiers can amplify signals from:
A. Single-ended inputs only
B. Differential inputs
C. Digital inputs only
D. AC supply
Using short signal paths helps to reduce
. Thermal noise
B. EMI pickup
C. Shot noise
D. Partition noise
Which noise reduction method improves SNR by time-domain processing?
A. Filtering
B. Averaging
C. Shielding
D. Grounding
IIR filters differ from FIR filters because IIR filters
A. have no feedback
B. have infinite impulse response
C. are always stable
D. are non-causal
Which filter is best suited for removing high-frequency noise from sensor signals?
A. High-pass filter
B. Band-stop filter
C. Low-pass filter
D. All-pass filter
A key limitation of analog filters compared to digital filters is
A. higher accuracy
B. limited flexibility
C. no real-time operation
D. infinite precision
Quantization error in an ADC arises due to
A. Sampling jitter
B. Finite number of output levels
C. Input noise
D. Reference voltage drift
The main source of offset error in an ADC is
A. Reference voltage instability
B. Sampling frequency
C. Quantization noise
D. Comparator offset
Aperture error in ADCs is related to
A. Quantization levels
B. Sampling time uncertainty
C. Reference voltage drift
D. Comparator offset
What does ISA stand for in industrial automation?
A. International Systems Association
B. Instrument Society of America
C. Industrial Safety Authority
D. International Standards Agency
Which IEC standard deals with electrical equipment for measurement, control, and laboratory use?
A. IEC 61010
B. IEC 61131
C. IEC 61511
D. IEC 60529
ISA standards are most widely used in which industry?
A. Civil construction
B. Biomedical engineering
C. Aerospace engineering
D. Process and manufacturing industries
What is a key benefit of using IEC standards?
A. Reduced safety requirements
B. Improved interoperability
C. Higher maintenance cost
D. Increased system complexity
ISA-95 helps bridge the gap between:
A. Control systems and enterprise systems
B. Sensors and actuators
C. Hardware and software
D. Field devices and networks
Which field instrument is used to measure flow rate?
A. Thermocouple
B. Tachometer
C. Orifice plate
D. Strain gauge
Control valves are classified as actuators because they
A. Measure flow
B. Amplify sensor outputs
C. Generate control signals
D. Regulate process variables
Which field instrument measures liquid level using pressure head?
A. Differential pressure transmitter
B. Ultrasonic level sensor
C. Float switch
D. Capacitive sensor
A thermocouple operates based on the
A. Hall effect
B. Seebeck effect
C. Piezoelectric effect
D. Photoelectric effect
Which instrument measures strain in mechanical structures?
A. LVDT
B. Strain gauge
C. Accelerometer
D. Tachometer
In field instrumentation, calibration ensures
A. Faster response
B. Lower power consumption
C. Better communication
D. Accurate measurement
A control valve actuator converts:
A. Flow energy into pressure
B. Electrical energy into digital signals
C. Control signals into mechanical motion
D. Pressure into temperature
A VFD is primarily used to control the:
A. Voltage of DC motors
B. Direction of stepper motors
C. Torque of hydraulic motors
D. Speed of AC motors
The term “rangeability” of a control valve refers to:
A. Maximum pressure rating
B. Ratio of maximum to minimum controllable flow
C. Valve travel length
D. Actuator stroke
A pneumatic control valve typically receives a control signal of:
A. 0–5 V
B. 4–20 mA
C. 3–15 psi
D. 24 V DC
The combined use of control valves and VSDs mainly aims to:
A. Improve process efficiency and control
B. Increase process noise
C. Increase system pressure
D. Eliminate sensors
Which layer of the OSI model is primarily defined by CAN?
A. Application layer
B. Transport layer
C. Data link and physical layers
D. Network layer
Which protocol is most suitable for real-time deterministic communication?
A. Ethernet/IP
B. Modbus TCP
C. Profibus DP
D. HART
Modbus addressing is based on:
A. Register numbers
B. IP addresses
C. MAC addresses
D. File names
A distinguishing feature of Ethernet/IP is:
A. Use of proprietary hardware
B. Compatibility with standard Ethernet infrastructure
C. Analog signal support
D. Token-based access
Which of the following is an advantage of PLCs over relay-based control?
A. Compact design and flexibility
B. Requires more wiring
C. Slower response
D. Less reliable
A key advantage of SCADA over DCS is:
A. Long-distance monitoring capability
B. Faster loop control
C. Reduces hardware costs
D. Uses analog computers
Which of the following is an example of a SCADA application?
A. Electric power grid monitoring
B. Controlling a single pump in a factory
C. Microcontroller-based hobby project
D. Automotive engine ECU
Which of the following is a limitation of PLCs compared to DCS?
A. Cannot use digital I/O
B. Slower scan times
C. Cannot operate in industrial environments
D. Less suitable for complex continuous processes
PLC programming can include which types of instructions?
A. Logic, arithmetic, timers, and counters
B. Only ON/OFF operations
C. Only analog signals
D. Only SCADA reporting
