BC Instrumentation Technician Certificate of
Qualification Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. Which of the following instruments is primarily used to measure
flow rate?
a) Thermocouple
b) Manometer
c) Flowmeter
d) Pressure switch
Flowmeters are specifically designed to measure the rate at which
fluid flows through a pipe or channel.
2. A 4–20 mA signal is commonly used in process control because:
a) It is easy to generate
b) It represents temperature only
c) It allows detection of line breaks
d) It cannot be used over long distances
The 4–20 mA standard allows for line break detection since a
signal below 4 mA indicates a fault.
3. Which of the following is a primary sensor for measuring
pressure?
a) RTD
b) Thermistor
c) Strain gauge
, d) Tachometer
Strain gauges detect pressure by converting the mechanical strain
from applied pressure into an electrical signal.
4. The purpose of a PLC in an instrumentation system is to:
a) Increase voltage
b) Control process logic
c) Measure temperature
d) Amplify signals
PLCs execute control logic and coordinate inputs and outputs to
manage industrial processes.
5. A thermocouple generates a voltage based on:
a) Magnetic field
b) Resistance
c) Temperature difference
d) Light intensity
Thermocouples produce a voltage proportional to the temperature
difference between two junctions.
6. Which type of valve is best for modulating flow in a process line?
a) Gate valve
b) Ball valve
c) Globe valve
d) Check valve
Globe valves are designed for precise control of flow rate, unlike
gate or ball valves which are primarily on/off.
7. What is the primary advantage of a digital transmitter over an
analog transmitter?
a) Lower cost
, b) Simpler wiring
c) Noise immunity and remote diagnostics
d) Shorter lifespan
Digital transmitters provide better noise immunity and allow
remote configuration and diagnostics.
8. The main function of an HART protocol is to:
a) Power transmitters
b) Provide digital communication over analog signals
c) Measure humidity
d) Convert AC to DC
HART allows digital signals to communicate over traditional 4–20
mA loops.
9. Which instrument measures the conductivity of a solution?
a) pH meter
b) Flowmeter
c) Conductivity sensor
d) Thermocouple
Conductivity sensors measure a solution's ability to conduct
electrical current.
10. When calibrating a pressure transmitter, you should first:
a) Open the control valve
b) Apply maximum pressure
c) Zero the transmitter
d) Replace the diaphragm
Zeroing ensures the transmitter reads correctly at the baseline (0
pressure).
Qualification Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. Which of the following instruments is primarily used to measure
flow rate?
a) Thermocouple
b) Manometer
c) Flowmeter
d) Pressure switch
Flowmeters are specifically designed to measure the rate at which
fluid flows through a pipe or channel.
2. A 4–20 mA signal is commonly used in process control because:
a) It is easy to generate
b) It represents temperature only
c) It allows detection of line breaks
d) It cannot be used over long distances
The 4–20 mA standard allows for line break detection since a
signal below 4 mA indicates a fault.
3. Which of the following is a primary sensor for measuring
pressure?
a) RTD
b) Thermistor
c) Strain gauge
, d) Tachometer
Strain gauges detect pressure by converting the mechanical strain
from applied pressure into an electrical signal.
4. The purpose of a PLC in an instrumentation system is to:
a) Increase voltage
b) Control process logic
c) Measure temperature
d) Amplify signals
PLCs execute control logic and coordinate inputs and outputs to
manage industrial processes.
5. A thermocouple generates a voltage based on:
a) Magnetic field
b) Resistance
c) Temperature difference
d) Light intensity
Thermocouples produce a voltage proportional to the temperature
difference between two junctions.
6. Which type of valve is best for modulating flow in a process line?
a) Gate valve
b) Ball valve
c) Globe valve
d) Check valve
Globe valves are designed for precise control of flow rate, unlike
gate or ball valves which are primarily on/off.
7. What is the primary advantage of a digital transmitter over an
analog transmitter?
a) Lower cost
, b) Simpler wiring
c) Noise immunity and remote diagnostics
d) Shorter lifespan
Digital transmitters provide better noise immunity and allow
remote configuration and diagnostics.
8. The main function of an HART protocol is to:
a) Power transmitters
b) Provide digital communication over analog signals
c) Measure humidity
d) Convert AC to DC
HART allows digital signals to communicate over traditional 4–20
mA loops.
9. Which instrument measures the conductivity of a solution?
a) pH meter
b) Flowmeter
c) Conductivity sensor
d) Thermocouple
Conductivity sensors measure a solution's ability to conduct
electrical current.
10. When calibrating a pressure transmitter, you should first:
a) Open the control valve
b) Apply maximum pressure
c) Zero the transmitter
d) Replace the diaphragm
Zeroing ensures the transmitter reads correctly at the baseline (0
pressure).
