ISA CERTIFIED CONTROL SYSTEMS TECHNICIAN
(CCST) LEVEL III 350 PRACTICE EXAM
QUESTIONS
Questions 1–50: Advanced Measurement & Instrumentation
1. A Coriolis flow meter directly measures which property?
A. Velocity
B. Density
C. Volumetric flow
D. Mass flow
Correct Answer: D
Rationale: Coriolis meters measure mass flow directly using vibrationinduced
phase shifts.
2. Smart transmitters use which protocol for digital communication over
analog signals?
A. Modbus RTU
B. HART
C. Profibus DP
D. Ethernet/IP
Correct Answer: B
,Rationale: HART (Highway Addressable Remote Transducer) overlays digital
signals on 4–20 mA analog signals.
3. What is the primary advantage of a 4wire transmitter over a 2wire
transmitter?
A. Lower cost
B. Intrinsic safety
C. Higher power output capability
D. Simpler wiring
Correct Answer: C
Rationale: 4wire transmitters have separate power supply enabling higher
output power.
4. Dead time in a measurement system refers to:
A. Sensor failure
B. Time delay before response begins
C. Output drift
D. Calibration error
Correct Answer: B
Rationale: Dead time is the delay between input and observable output
response.
5. Which device is most suitable for measuring slurry flow?
A. Turbine meter
B. Electromagnetic flow meter
C. Orifice plate
,D. Pitot tube
Correct Answer: B
Rationale: Magnetic flow meters handle conductive fluids with solids
effectively.
6. A thermocouple measures temperature based on:
A. Resistance change
B. Voltage generation (Seebeck effect)
C. Magnetic field
D. Capacitance
Correct Answer: B
Rationale: Thermocouples generate a voltage proportional to the temperature
difference between two dissimilar metal junctions.
7. Which temperature sensor is the most accurate?
A. Thermistor
B. Thermocouple
C. RTD
D. Filled bulb thermometer
Correct Answer: C
Rationale: RTDs offer the highest accuracy and stability among common
temperature sensors.
8. What temperature device is selfpowered?
A. RTD
B. Thermistor
, C. Thermocouple
D. Filled bulb
Correct Answer: C
Rationale: Thermocouples generate their own voltage and do not require an
external power source.
9. What is the standard acceleration due to gravity of the Earth?
A. 9.8 m/s²
B. 32.2 ft/s²
C. Both A and B
D. 9.81 m/s²
Correct Answer: C
Rationale: The standard acceleration due to gravity is 9.8 m/s² (or 32.2 ft/s²).
10. One bar is approximately what in PSIG?
A. 12.5 PSIG
B. 14.5 PSIG
C. 15.0 PSIG
D. 10.0 PSIG
Correct Answer: B
Rationale: One bar is approximately 14.5 PSIG.
11. What test equipment would be needed to calibrate an electronic analog
pressure transmitter?
A. Multimeter only
B. Pressure standard and current standard
(CCST) LEVEL III 350 PRACTICE EXAM
QUESTIONS
Questions 1–50: Advanced Measurement & Instrumentation
1. A Coriolis flow meter directly measures which property?
A. Velocity
B. Density
C. Volumetric flow
D. Mass flow
Correct Answer: D
Rationale: Coriolis meters measure mass flow directly using vibrationinduced
phase shifts.
2. Smart transmitters use which protocol for digital communication over
analog signals?
A. Modbus RTU
B. HART
C. Profibus DP
D. Ethernet/IP
Correct Answer: B
,Rationale: HART (Highway Addressable Remote Transducer) overlays digital
signals on 4–20 mA analog signals.
3. What is the primary advantage of a 4wire transmitter over a 2wire
transmitter?
A. Lower cost
B. Intrinsic safety
C. Higher power output capability
D. Simpler wiring
Correct Answer: C
Rationale: 4wire transmitters have separate power supply enabling higher
output power.
4. Dead time in a measurement system refers to:
A. Sensor failure
B. Time delay before response begins
C. Output drift
D. Calibration error
Correct Answer: B
Rationale: Dead time is the delay between input and observable output
response.
5. Which device is most suitable for measuring slurry flow?
A. Turbine meter
B. Electromagnetic flow meter
C. Orifice plate
,D. Pitot tube
Correct Answer: B
Rationale: Magnetic flow meters handle conductive fluids with solids
effectively.
6. A thermocouple measures temperature based on:
A. Resistance change
B. Voltage generation (Seebeck effect)
C. Magnetic field
D. Capacitance
Correct Answer: B
Rationale: Thermocouples generate a voltage proportional to the temperature
difference between two dissimilar metal junctions.
7. Which temperature sensor is the most accurate?
A. Thermistor
B. Thermocouple
C. RTD
D. Filled bulb thermometer
Correct Answer: C
Rationale: RTDs offer the highest accuracy and stability among common
temperature sensors.
8. What temperature device is selfpowered?
A. RTD
B. Thermistor
, C. Thermocouple
D. Filled bulb
Correct Answer: C
Rationale: Thermocouples generate their own voltage and do not require an
external power source.
9. What is the standard acceleration due to gravity of the Earth?
A. 9.8 m/s²
B. 32.2 ft/s²
C. Both A and B
D. 9.81 m/s²
Correct Answer: C
Rationale: The standard acceleration due to gravity is 9.8 m/s² (or 32.2 ft/s²).
10. One bar is approximately what in PSIG?
A. 12.5 PSIG
B. 14.5 PSIG
C. 15.0 PSIG
D. 10.0 PSIG
Correct Answer: B
Rationale: One bar is approximately 14.5 PSIG.
11. What test equipment would be needed to calibrate an electronic analog
pressure transmitter?
A. Multimeter only
B. Pressure standard and current standard
