Michigan Instrumentation Technician
Level 2 Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
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1. In a 4–20 mA loop, if the transmitter outputs 12 mA with a calibrated
span of 4–20 mA representing 0–100 psi, what is the measured
process value?
A. 50 psi
B. 56.25 psi
C. 48 psi
D. 62.5 psi
This answer is correct because 12 mA is 50% of the 4–20 mA range,
and 50% of the 0–100 psi range is 50 psi, adjusted for the 4 mA zero
shift yields 56.25 psi.
2. A thermocouple circuit exhibits a consistent offset error at ambient
temperature. Which calibration adjustment corrects this issue?
A. Span calibration
B. Linearity correction
C. Cold junction compensation adjustment
D. Reversing polarity
Cold junction compensation adjustment corrects errors at reference
junction temperature, ensuring accurate thermocouple output.
3. Which instrument is most appropriate for measuring fluid level in a
pressurized tank with vapor space variation?
A. Float switch
B. Capacitive sensor
, C. Ultrasonic sensor
D. Differential pressure transmitter
Differential pressure transmitters measure the pressure difference
between the bottom and top of the tank to infer level, making them
suitable for pressurized vessels.
4. A 10 V DC signal resonates noise at certain frequencies. What is the
best method to reduce this noise?
A. Increase excitation voltage
B. Replace sensors
C. Use shielded twisted-pair cabling
D. Add a series resistor
Shielded twisted-pair cabling minimizes electromagnetic
interference, which is a common noise source in low-level DC signals.
5. What is the primary reason for performing zero suppression on a radar
level transmitter?
A. To improve linearity
B. To adjust for buildup or false echoes near the antenna
C. To increase measurement range
D. To compensate for temperature drift
Zero suppression prevents the instrument from measuring spurious
near-field signals that would otherwise distort the level reading.
6. When adjusting a pneumatic controller, what does “droop” refer to?
A. Deadband width
B. Response time delay
C. Decrease in output with increasing error
D. Hysteresis
Droop describes the reduction in controller output when the error
increases, affecting proportional control accuracy.
7. A PLC analog input card reads a 1–5 V signal. What must be done to
interface a 0–10 V transmitter?
A. Use a Zener diode
B. Add a signal splitter or attenuator
C. Change to differential input
D. Configure as sink/source
, An attenuator scales the 0–10 V signal down to the 1–5 V range
compatible with the PLC input card.
8. The transfer function of a first-order lag system is G(s) = 1/(τs + 1).
What effect does a smaller τ have on system response?
A. Faster response
B. Increased overshoot
C. Lower steady-state gain
D. Larger dead time
A smaller time constant τ means the system responds more quickly to
changes in the input.
9. You measure 120 Ω across a temperature sensor that should be 100 Ω
at 0 °C. What is the likely cause?
A. Broken wiring
B. Sensor drift or damage
C. Cold junction error
D. ADC quantization error
A resistance higher than expected indicates the sensor has drifted
from its nominal value or is damaged.
10. For HART communication, the analog signal must remain in what
range?
A. 0–5 V
B. 0–20 mA
C. 4–20 mA
D. 10–50 mA
HART overlays digital communication on the standard 4–20 mA
analog loop without disturbing the base measurement signal.
11. Which OSHA regulation is primarily concerned with electrical
safety in industrial instrumentation work?
A. Respiratory protection
B. Hazard communication
C. NFPA 70E electrical safety standard
D. Confined space entry
NFPA 70E outlines electrical safety requirements to protect personnel
from electrical hazards.
Level 2 Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
1. In a 4–20 mA loop, if the transmitter outputs 12 mA with a calibrated
span of 4–20 mA representing 0–100 psi, what is the measured
process value?
A. 50 psi
B. 56.25 psi
C. 48 psi
D. 62.5 psi
This answer is correct because 12 mA is 50% of the 4–20 mA range,
and 50% of the 0–100 psi range is 50 psi, adjusted for the 4 mA zero
shift yields 56.25 psi.
2. A thermocouple circuit exhibits a consistent offset error at ambient
temperature. Which calibration adjustment corrects this issue?
A. Span calibration
B. Linearity correction
C. Cold junction compensation adjustment
D. Reversing polarity
Cold junction compensation adjustment corrects errors at reference
junction temperature, ensuring accurate thermocouple output.
3. Which instrument is most appropriate for measuring fluid level in a
pressurized tank with vapor space variation?
A. Float switch
B. Capacitive sensor
, C. Ultrasonic sensor
D. Differential pressure transmitter
Differential pressure transmitters measure the pressure difference
between the bottom and top of the tank to infer level, making them
suitable for pressurized vessels.
4. A 10 V DC signal resonates noise at certain frequencies. What is the
best method to reduce this noise?
A. Increase excitation voltage
B. Replace sensors
C. Use shielded twisted-pair cabling
D. Add a series resistor
Shielded twisted-pair cabling minimizes electromagnetic
interference, which is a common noise source in low-level DC signals.
5. What is the primary reason for performing zero suppression on a radar
level transmitter?
A. To improve linearity
B. To adjust for buildup or false echoes near the antenna
C. To increase measurement range
D. To compensate for temperature drift
Zero suppression prevents the instrument from measuring spurious
near-field signals that would otherwise distort the level reading.
6. When adjusting a pneumatic controller, what does “droop” refer to?
A. Deadband width
B. Response time delay
C. Decrease in output with increasing error
D. Hysteresis
Droop describes the reduction in controller output when the error
increases, affecting proportional control accuracy.
7. A PLC analog input card reads a 1–5 V signal. What must be done to
interface a 0–10 V transmitter?
A. Use a Zener diode
B. Add a signal splitter or attenuator
C. Change to differential input
D. Configure as sink/source
, An attenuator scales the 0–10 V signal down to the 1–5 V range
compatible with the PLC input card.
8. The transfer function of a first-order lag system is G(s) = 1/(τs + 1).
What effect does a smaller τ have on system response?
A. Faster response
B. Increased overshoot
C. Lower steady-state gain
D. Larger dead time
A smaller time constant τ means the system responds more quickly to
changes in the input.
9. You measure 120 Ω across a temperature sensor that should be 100 Ω
at 0 °C. What is the likely cause?
A. Broken wiring
B. Sensor drift or damage
C. Cold junction error
D. ADC quantization error
A resistance higher than expected indicates the sensor has drifted
from its nominal value or is damaged.
10. For HART communication, the analog signal must remain in what
range?
A. 0–5 V
B. 0–20 mA
C. 4–20 mA
D. 10–50 mA
HART overlays digital communication on the standard 4–20 mA
analog loop without disturbing the base measurement signal.
11. Which OSHA regulation is primarily concerned with electrical
safety in industrial instrumentation work?
A. Respiratory protection
B. Hazard communication
C. NFPA 70E electrical safety standard
D. Confined space entry
NFPA 70E outlines electrical safety requirements to protect personnel
from electrical hazards.
