Instrumentation Technician Level II
Exam Practice Questions And Correct
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1.Which instrument is primarily used to measure pressure in an industrial
process?
A. Flowmeter
B. Thermocouple
C. Pressure transmitter
D. Tachometer
Rationale: A pressure transmitter senses process pressure and converts it
into a standardized output signal, such as 4–20 mA, for monitoring and
control.
2. What is the standard analog current signal commonly used in
industrial instrumentation?
A. 0–5 mA
B. 1–10 mA
C. 4–20 mA
D. 20–40 mA
Rationale: The 4–20 mA current loop is the industry standard because it
provides excellent noise immunity and allows detection of circuit faults
through the live-zero value of 4 mA.
, 3. Which device measures the flow rate of a liquid by detecting the
pressure difference across a restriction?
A. Rotameter
B. Orifice plate
C. Venturi pump
D. Bourdon tube
Rationale: An orifice plate creates a pressure drop proportional to the flow
rate, allowing differential pressure instruments to calculate flow.
4. What is the primary function of a thermocouple?
A. Measure pressure
B. Measure flow
C. Measure temperature
D. Measure level
Rationale: A thermocouple produces a voltage based on the temperature
difference between two dissimilar metal junctions.
5. Which instrument converts a pneumatic signal into a proportional
valve movement?
A. Solenoid valve
B. Valve positioner
C. Check valve
D. Globe valve
Rationale: A valve positioner accurately positions the valve stem according
to the control signal received.
6. What does PLC stand for?
A. Process Line Controller
B. Programmable Logic Controller
C. Power Load Circuit
D. Pressure Level Converter
Rationale: A Programmable Logic Controller is a digital industrial computer
designed for automation and process control.
, 7. Which sensor is commonly used for continuous liquid level
measurement?
A. Limit switch
B. Float switch
C. Ultrasonic level transmitter
D. Push button
Rationale: Ultrasonic level transmitters provide continuous non-contact
level measurement using reflected sound waves.
8. Which instrument measures differential pressure?
A. Thermometer
B. Ammeter
C. DP transmitter
D. Voltmeter
Rationale: A differential pressure transmitter measures the pressure
difference between two process points.
9. Which valve characteristic provides nearly linear installed flow under
varying pressure conditions?
A. Quick opening
B. Equal percentage
C. Linear
D. Rotary
Rationale: Equal percentage valves provide progressively larger flow
increases for equal stem movements, making them suitable for varying
pressure drops.
10. Which electrical quantity is measured in ohms?
A. Voltage
B. Current
C. Power
D. Resistance
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
1.Which instrument is primarily used to measure pressure in an industrial
process?
A. Flowmeter
B. Thermocouple
C. Pressure transmitter
D. Tachometer
Rationale: A pressure transmitter senses process pressure and converts it
into a standardized output signal, such as 4–20 mA, for monitoring and
control.
2. What is the standard analog current signal commonly used in
industrial instrumentation?
A. 0–5 mA
B. 1–10 mA
C. 4–20 mA
D. 20–40 mA
Rationale: The 4–20 mA current loop is the industry standard because it
provides excellent noise immunity and allows detection of circuit faults
through the live-zero value of 4 mA.
, 3. Which device measures the flow rate of a liquid by detecting the
pressure difference across a restriction?
A. Rotameter
B. Orifice plate
C. Venturi pump
D. Bourdon tube
Rationale: An orifice plate creates a pressure drop proportional to the flow
rate, allowing differential pressure instruments to calculate flow.
4. What is the primary function of a thermocouple?
A. Measure pressure
B. Measure flow
C. Measure temperature
D. Measure level
Rationale: A thermocouple produces a voltage based on the temperature
difference between two dissimilar metal junctions.
5. Which instrument converts a pneumatic signal into a proportional
valve movement?
A. Solenoid valve
B. Valve positioner
C. Check valve
D. Globe valve
Rationale: A valve positioner accurately positions the valve stem according
to the control signal received.
6. What does PLC stand for?
A. Process Line Controller
B. Programmable Logic Controller
C. Power Load Circuit
D. Pressure Level Converter
Rationale: A Programmable Logic Controller is a digital industrial computer
designed for automation and process control.
, 7. Which sensor is commonly used for continuous liquid level
measurement?
A. Limit switch
B. Float switch
C. Ultrasonic level transmitter
D. Push button
Rationale: Ultrasonic level transmitters provide continuous non-contact
level measurement using reflected sound waves.
8. Which instrument measures differential pressure?
A. Thermometer
B. Ammeter
C. DP transmitter
D. Voltmeter
Rationale: A differential pressure transmitter measures the pressure
difference between two process points.
9. Which valve characteristic provides nearly linear installed flow under
varying pressure conditions?
A. Quick opening
B. Equal percentage
C. Linear
D. Rotary
Rationale: Equal percentage valves provide progressively larger flow
increases for equal stem movements, making them suitable for varying
pressure drops.
10. Which electrical quantity is measured in ohms?
A. Voltage
B. Current
C. Power
D. Resistance
