NYC Health + Hospitals Instrumentation
Technician Examination Practice Exam
2026 | 100 Questions & Answers with
Detailed Rationales | Complete Exam
Prep & Study Guide
1. What is the primary purpose of an instrumentation and control system in a
healthcare facility?
A. To decorate equipment rooms
B. To monitor and control operating conditions
C. To eliminate all maintenance
D. To replace mechanical systems
Answer: To monitor and control operating conditions
Rationale: Instrumentation systems measure variables such as temperature,
pressure, flow, and level and provide information or control signals needed for
safe and efficient operation.
2. Which instrument is commonly used to measure temperature?
A. Pressure gauge
B. Flowmeter
C. Thermocouple
D. Manometer
,Answer: Thermocouple
Rationale: A thermocouple generates a small voltage related to the
temperature difference between its measuring junction and reference junction.
3. What does a pressure transmitter typically provide to a control system?
A. A mechanical valve position only
B. An electrical signal proportional to pressure
C. A steam supply
D. A compressed-air supply
Answer: An electrical signal proportional to pressure
Rationale: A pressure transmitter converts measured pressure into a
standardized electrical signal for monitoring or control.
4. Which unit is commonly used to express pressure in industrial and building
systems?
A. Ohm
B. Hertz
C. PSI
D. Watt
Answer: PSI
Rationale: PSI means pounds per square inch and is widely used for measuring
pressure in piping, steam, air, and hydraulic systems.
5. What is the main function of a control valve?
A. Store electrical energy
B. Regulate fluid flow
C. Measure electrical resistance
D. Generate compressed air
Answer: Regulate fluid flow
Rationale: Control valves vary the flow of liquids, gases, or steam in response to
a control signal.
, 6. What does calibration mean?
A. Replacing every instrument
B. Comparing an instrument with a known standard and adjusting it when
necessary
C. Cleaning a control panel
D. Increasing system pressure
Answer: Comparing an instrument with a known standard and adjusting it when
necessary
Rationale: Calibration establishes the relationship between an instrument's
indication and a recognized reference standard.
7. Which device is designed to detect liquid level?
A. Level transmitter
B. Ammeter
C. Tachometer
D. Voltmeter
Answer: Level transmitter
Rationale: Level transmitters measure the height or quantity of liquid in tanks,
vessels, or other containers.
8. What is the purpose of a differential-pressure transmitter?
A. Measure the difference between two pressures
B. Measure electrical frequency
C. Measure temperature only
D. Control lighting
Answer: Measure the difference between two pressures
Rationale: Differential-pressure instruments compare pressure at two points
and are commonly used for flow, filter monitoring, and level measurement.
9. Which signal is commonly associated with industrial analog
instrumentation?
A. 4–20 mA
B. 0–1 watt
, C. 120–240 Hz
D. 100–200 PSI
Answer: 4–20 mA
Rationale: The 4–20 mA current loop is a widely used analog instrumentation
standard because it is resistant to voltage drop and electrical noise.
10.In a 4–20 mA system, what current normally represents the lower range
value?
A. 0 mA
B. 2 mA
C. 4 mA
D. 20 mA
Answer: 4 mA
Rationale: Four milliamps normally represents 0% of the measured range, while
20 mA represents 100%.
11.What is the purpose of the 4 mA “live zero”?
A. To indicate that the circuit is energized even at the lower measurement
value
B. To shut down the transmitter
C. To increase pressure
D. To eliminate calibration
Answer: To indicate that the circuit is energized even at the lower measurement
value
Rationale: A live zero helps distinguish a valid low reading from a broken or
open signal circuit.
12.Which instrument measures electrical current?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Manometer
Technician Examination Practice Exam
2026 | 100 Questions & Answers with
Detailed Rationales | Complete Exam
Prep & Study Guide
1. What is the primary purpose of an instrumentation and control system in a
healthcare facility?
A. To decorate equipment rooms
B. To monitor and control operating conditions
C. To eliminate all maintenance
D. To replace mechanical systems
Answer: To monitor and control operating conditions
Rationale: Instrumentation systems measure variables such as temperature,
pressure, flow, and level and provide information or control signals needed for
safe and efficient operation.
2. Which instrument is commonly used to measure temperature?
A. Pressure gauge
B. Flowmeter
C. Thermocouple
D. Manometer
,Answer: Thermocouple
Rationale: A thermocouple generates a small voltage related to the
temperature difference between its measuring junction and reference junction.
3. What does a pressure transmitter typically provide to a control system?
A. A mechanical valve position only
B. An electrical signal proportional to pressure
C. A steam supply
D. A compressed-air supply
Answer: An electrical signal proportional to pressure
Rationale: A pressure transmitter converts measured pressure into a
standardized electrical signal for monitoring or control.
4. Which unit is commonly used to express pressure in industrial and building
systems?
A. Ohm
B. Hertz
C. PSI
D. Watt
Answer: PSI
Rationale: PSI means pounds per square inch and is widely used for measuring
pressure in piping, steam, air, and hydraulic systems.
5. What is the main function of a control valve?
A. Store electrical energy
B. Regulate fluid flow
C. Measure electrical resistance
D. Generate compressed air
Answer: Regulate fluid flow
Rationale: Control valves vary the flow of liquids, gases, or steam in response to
a control signal.
, 6. What does calibration mean?
A. Replacing every instrument
B. Comparing an instrument with a known standard and adjusting it when
necessary
C. Cleaning a control panel
D. Increasing system pressure
Answer: Comparing an instrument with a known standard and adjusting it when
necessary
Rationale: Calibration establishes the relationship between an instrument's
indication and a recognized reference standard.
7. Which device is designed to detect liquid level?
A. Level transmitter
B. Ammeter
C. Tachometer
D. Voltmeter
Answer: Level transmitter
Rationale: Level transmitters measure the height or quantity of liquid in tanks,
vessels, or other containers.
8. What is the purpose of a differential-pressure transmitter?
A. Measure the difference between two pressures
B. Measure electrical frequency
C. Measure temperature only
D. Control lighting
Answer: Measure the difference between two pressures
Rationale: Differential-pressure instruments compare pressure at two points
and are commonly used for flow, filter monitoring, and level measurement.
9. Which signal is commonly associated with industrial analog
instrumentation?
A. 4–20 mA
B. 0–1 watt
, C. 120–240 Hz
D. 100–200 PSI
Answer: 4–20 mA
Rationale: The 4–20 mA current loop is a widely used analog instrumentation
standard because it is resistant to voltage drop and electrical noise.
10.In a 4–20 mA system, what current normally represents the lower range
value?
A. 0 mA
B. 2 mA
C. 4 mA
D. 20 mA
Answer: 4 mA
Rationale: Four milliamps normally represents 0% of the measured range, while
20 mA represents 100%.
11.What is the purpose of the 4 mA “live zero”?
A. To indicate that the circuit is energized even at the lower measurement
value
B. To shut down the transmitter
C. To increase pressure
D. To eliminate calibration
Answer: To indicate that the circuit is energized even at the lower measurement
value
Rationale: A live zero helps distinguish a valid low reading from a broken or
open signal circuit.
12.Which instrument measures electrical current?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Manometer
