Advanced Diagnostics Training I (ADT-I) Practice Exam

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• Rank the following gamma spectroscopy detectors from worst to best in typical energy resolution: NaI, CZT, LaBr, HPGe.
• Which type of radiation results when a beta particle is attracted to a high-Z material?
• How are free radicals formed by ionizing radiation according to the material?
• Which of the following are known confounds that can affect interpretation of BOLD fMRI signals?
• How do you distinguish a firmware bug from a hardware fault during diagnostics?
• Which safety practice is essential to isolate energy sources before performing high-voltage diagnostics?
• In arterial Doppler studies, which finding most strongly suggests arterial insufficiency?
• What does the area under the ROC curve (AUC) represent?
• What occurs during nuclear fission?
• Back-EMF in a DC motor is typically used to
• What does TEDE stand for in radiation protection dose terminology?
• How would you apply design of experiments (DoE) to optimize diagnostic thresholds?
• How would you differentiate between a sensor drift and a sensor outright failure?
• What does Turnaround Time (TAT) measure in diagnostic laboratories?
• What is the purpose of a quality improvement project using Plan-Do-Study-Act (PDSA) cycles in a diagnostics setting?
• Describe the key components of a complete blood count (CBC) and what abnormalities may indicate.
• How does data logging frequency affect catching transient faults?
• In the context of triage data submission, which option shows the exact trio of items?
• What do calibration curves do in diagnostic data visualization?
• How do accuracy and precision differ, and which describes a thermometer reading 102°C when the true value is 95°C?
• Which action should be clearly stated in a report about an incidental finding to support follow-up?
• In a communication protocol, how do parity and checksums help when frames are corrupted?
• What is a common cause of motion artifacts in MRI, and what strategies help mitigate them?
• EPA guidance dose limits for exposure scenarios include which combination?
• What is the primary purpose of including environmental sensor readings in diagnostic logs?
• Which scenario best illustrates an anomaly rather than a fault?
• What is a phantom in imaging QA, and how is it used?
• How are indeterminate results typically managed in diagnostic testing?
• Thermal condition monitoring is useful for motor health because?
• What effect do impedance mismatches have on signal integrity in long wiring runs for sensors, and how can you mitigate them?
• In hepatic laboratory panels, which pattern suggests cholestasis versus hepatocellular injury?
• Which NNSA asset assists with ground area search?
• Which statement about turnaround times in microbiology diagnostics is correct?
• What is a key benefit of including patient-friendly summaries in reports about incidental findings?
• Which radiation requires Full Face Respiratory Protection & Protective Clothing?
• What is the ionization process?
• In diagnostic imaging, which description best captures when CT is preferred over MRI?
• Which reporting practice best reduces misinterpretation when documenting incidental findings?
• Which is a technical advantage of a Geiger-Müller counter?
• Which statement accurately distinguishes measurement accuracy and precision and explains why both matter in diagnostics?
• What is the consequence of poor calibration in quantitative tests?
• Which equation expresses the Law of Conservation of Mass-Energy?
• Triaged submissions require how many pictures?
• Which of the following is a standard method to improve signal-to-noise ratio in diagnostic signal processing?
• Which phase is labeled 'Diagnostics' in the C-WMD sequence?
• Which radiation lists Respiratory Protection as its protective measure?
• In spectral analysis, what are the two masking types that can obscure true peaks?
• What is an appropriate approach to incidental findings found during diagnostic imaging?
• Which set of dose limits is correct according to regulatory guidance?
• Identify the correct three items that must be uploaded for triage.
• How should uncertainty be treated in reports about incidental findings?
• Which statement accurately defines QA versus QC in diagnostic settings?
• Which tool is commonly used to map causal relationships in cross-functional RCA?
• What is the purpose of z-scores in pediatric growth assessment?
• Which radiotracer is commonly used in PET imaging for oncology?
• What is the best shielding for gamma radiation?
• Why are environmental factors such as temperature and humidity important in diagnostics and how do you account for them?
• Which statement correctly identifies a common radiographic artifact and a valid mitigation?
• What is a best practice to confirm whether a fault is software-related rather than hardware-related?
• Which measurements are recommended to assess motor health for a PWM-driven DC motor?
• In the isotope Cu-63 (Cu with Z=29, A=63), how many protons, neutrons, and electrons are present?
• What is the role of dexamethasone in imaging contrast reactions?
• Which radiation is an electromagnetic energy that originates outside the nucleus?
• In nuclear reactor criticality terms, what does K < 1 indicate?
• Subclinical thyroid dysfunction is defined by which pattern?
• Which pair correctly identifies the US and SI units for exposure?
• Which statement about positive predictive value (PPV) and negative predictive value (NPV) and disease prevalence is true?
• What are common prerequisites for high-quality specimen collection in microbiology to avoid rejection or contamination?
• For Co-60 handling procedures, which reference is followed?
• Which result best demonstrates successful data analysis in a diagnostic workflow?
• Describe the difference between reactive and proactive diagnostics.
• What is the SI unit for dose equivalent?
• Which description best fits a Container search in diagnostic protocols?
• In fault diagnostics, what is a 'freeze frame' data capture?
• If a diagnostic threshold is raised, what is the typical effect on sensitivity and specificity?
• What does 'traceable' calibration mean in sensor calibration?
• Which of the following is a recognized limitation of clinical genomic sequencing?
• Which of the following is the correct triage upload trio?
• Define MTBF and diagnostic coverage and explain how they influence maintenance planning.
• Which metrics are used in CT dose assessment?
• What is the SI unit for absorbed dose corresponding to the US unit RAD?
• What is the best shielding for X-ray radiation?
• Which option lists the exact three items required for triage data upload?
• In functional MRI, what does the BOLD signal reflect?
• What does the ALARA principle mean in radiology practice?
• Which pair correctly matches the US and SI units for activity?
• What describes excitation?
• In a high gamma field, what type of reading may a neutron proportional counter report?
• What is oscilloscope aliasing and how can it be avoided?
• Which of the following best describes the main objective of the 'define problem/scope' phase in a diagnostic workflow?
• Which of the following options lists the correct triage upload trio?
• Which format provides the most comprehensive guidance for follow-up when an incidental finding is detected?
• At a cumulative exposure of 450 rem, which is more dangerous?
• Which detector provides the best energy resolution among common gamma-ray detectors?
• Which shielding is recommended for neutron radiation?
• What is the clinical significance of electrolyte disturbances such as hyperkalemia or hyponatremia, and how are they investigated?
• What is the role of a diagnostic trouble code (DTC) in automotive diagnostics, and how should you approach clearing DTCs?
• Which phase corresponds to Forensics in the C-WMD technical phases?
• Which statement best describes diagnostic coverage?
• EMG/nerve conduction studies are primarily used to evaluate which part of the body?
• In management of an acute contrast reaction, what is the initial step?
• Which Presidential Policy Directive addresses Domestic Guidelines?
• What is the name of the gamma-spec equipment used on PDX-2?
• In signal processing, what is the purpose of a low-pass filter in diagnostic devices?
• Which statement accurately describes culture-based microbiology diagnostics?
• How many pictures are submitted to triage?
• How do PET and SPECT imaging compare in terms of sensitivity, functional information, and typical radiotracers?
• You measure a voltage waveform with a scope that shows a 60 Hz sine wave with 100 mV ripple. How would you interpret and what diagnostic conclusions could you draw?
• Which statement best describes the triage upload components?
• Which statement best describes essential pediatric growth assessment features and how z-scores are used?
• Which CBC finding most often indicates anemia?
• Which finding on Doppler ultrasound indicates venous insufficiency?
• What is a key practice for validating a diagnostic algorithm before deploying to hardware?
• Which option lists the exact phrase used to describe the triage reading and rates?
• Which is a quantitative imaging biomarker?
• Which description matches neutron radiation?
• Which statement describes beta radiation?
• Which option again represents the exact triage trio of items?
• Which practice supports patient understanding when incidental findings are reported?
• What is the role of a multidisciplinary team (MDT) in diagnostic accuracy?
• What steps would you take to perform a root cause analysis for a system that intermittently fails under load?
• Which equation expresses the inverse square law as described?
• Which methods are used to quickly convert a subcritical system to a supercritical state in design approaches?
• Besides increasing sampling rate, what is another method to avoid aliasing?
• In a two-point calibration of a linear sensor, what parameters are determined and how are they used?
• Which combination best maintains signal integrity for long sensor runs?
• For suspected pulmonary embolism, which sequence best reflects the recommended initial workup?
• Which statement best describes the complementary roles of sensitivity and specificity in screening tests?
• What is a logical assertion and how is it used in diagnostic test development?
• Which reporting approach most clearly conveys the significance and uncertainty of an incidental finding?
• If a patient has a pre-test probability of 30% and the test's positive likelihood ratio is 3, what is the approximate post-test probability?
• Which radiation originates from the nucleus and has mass 0 amu?
• Which imaging feature is most commonly associated with malignant lesions on imaging?
• What is the best shielding for neutron radiation?
• For the Triage website login, which items serve as the username and password?
• Which of the following correctly lists the four phases of a structured diagnostic process in the correct order and states the primary objective of each phase?
• Which practice helps ensure consistency across reports about incidental findings?
• In CAN bus arbitration, what mechanism ensures higher priority messages transmit earlier when multiple nodes attempt to send?
• Explain the concept of diagnostic coverage versus test coverage in validating a diagnostic system.
• Compared with HPGe detectors, which statement best describes NaI detectors?
• Which symptom would indicate the motor is stalling in a PWM-driven DC motor health assessment?
• Which statement best describes how to communicate follow-up requirements for incidental findings?
• Explain the difference between serial and parallel communication and their diagnostic implications.
• What is a likelihood ratio, and how does it augment diagnostic reasoning compared to sensitivity and specificity?
• What is signal-to-noise ratio (SNR) and how does it affect weak sensor signals?
• What are the two main classes of detectors?
• Which option best ensures patient-friendly communication and actionable guidance for incidental findings?
• In DoE analysis for diagnostic thresholds, which metrics are typically used to assess performance?
• In diagnostic testing, pre-test probability is defined as which of the following?
• Which statement best defines a Nuclear Reaction?
• In pediatric contrast safety, which statement is true?
• Which description matches X-ray radiation?
• Which statement best differentiates PDSA from the Plan-Do-Check-Act cycle?
• Which Presidential Policy Directive addresses National Preparedness?
• What is debounce in electronics and how is it relevant to diagnosing noisy switch inputs?
• How are reference intervals established?
• Which ratio determines the nuclear stability of an atom?
• What is the role of pretest probability scoring systems like Wells or PERC in suspected PE?
• How do PCR-based infectious disease tests differ from antigen-based rapid tests in terms of sensitivity and turnaround time?
• Which detector is typically the least expensive option among common gamma-ray detectors?
• In OCONUS, which holds the strategic control over DOD personnel during an Incident of National Significance?
• In CONUS, which holds the operational control over DOD personnel during an Incident of National Significance?
• What is the primary benefit of sensor fusion via a Kalman filter in a diagnostic system?
• Which phase is labeled 'Safe to Ship' in the C-WMD sequence?
• Which elements are documented in each Plan-Do-Study-Act (PDSA) cycle?
• What is the difference between a chemical and nuclear explosion in regards to the elements involved?
• Which NNSA asset assists with airborne radiation detection?
• Which is an example of a pre-analytical error in laboratory testing?
• Which statement about molecular diagnostic methods is true?
• Which organization holds the tactical control over DOD personnel during an Incident of National Significance in CONUS?
• What happens in nuclear fusion?
• Which option represents a qualitative imaging biomarker?
• Which element best supports clinician access to follow-up guidance for incidental findings?
• How would you design a fault tree to diagnose intermittent electrical fault?
• In a LIN bus system, what distinguishes LIN from CAN?
• What is the purpose of using a reference measurement when diagnosing a sensor?
• Which readings and two rates must you upload for triage?
• LD50/30 is a toxicology measure that indicates what?
• What is the purpose of a baseline health check in a diagnostic program?
• Which action is least aligned with a methodical fault tree approach for intermittent faults?
• What is a Shmoo plot and in what context is it used in diagnostics?
• What is the purpose of a slew-rate test on an actuator signal, and what would indicate abnormal behavior?
• In triage documentation, how many pictures are submitted?
• Which statement best describes how post-test odds and probability are computed using pretest odds and likelihood ratio?
• Which description corresponds to gamma radiation?
• How would you use a thermal camera in diagnosing electronic assemblies?
• What is the primary purpose of parity bits and checksums in data communications?
• Describe how a Kalman filter could be used to fuse noisy sensor data in a diagnostic system.
• Which outcome is achieved by including structured content and patient-friendly elements in incidental finding reports?
• Which subatomic particle determines the element?
• Which option represents the required triage upload set?
• How would you perform a cross-functional RCA for a multi-system failure?
• Which reporting approach aligns with using structured templates for incidental findings?
• What is radiomics in diagnostics?
• Which statement correctly describes the role of the Identifinder in gamma spectroscopy?
• Which option includes the precise triage reading and rates?
• What is the purpose of using a 'shadow mode' or 'simulation mode' in diagnostic software?
• What is the mission of the ADT-1 first responder?
• Which feature is commonly associated with malignant lesions on imaging?
• What is the best shielding for alpha radiation?
• Which imaging modality is more susceptible to motion artifacts during scanning?
• Which pattern defines overt hypothyroidism, overt hyperthyroidism, and subclinical states?
• Which are the two alert commitments maintained by the FBI for Phase 1 crisis response?
• Which radiation originates outside the nucleus and is electromagnetic energy with zero mass and zero charge?
• Which detector type relies on charge collection in a solid-state substrate?
• What is a key element in communicating incidental imaging findings to support appropriate follow-up?
• Which precautions minimize contrast-induced nephropathy in at-risk patients?
• In diagnostics, what is the difference between a fault and an anomaly?
• Define an Area, Point, and Container Search.
• Describe the role of calibration drift and how to mitigate it in DAQ systems.
• What is a tumor marker, and what are the limitations of using markers such as PSA or CA-125 for cancer screening?
• Explain the difference between open-loop and closed-loop control with examples in diagnostics.
• Explain how to interpret a waveform from an LC filter test and what anomalies indicate issues.
• Which is a technical advantage of an ionization chamber?
• Describe how to perform a 2-point calibration for a linear sensor and why it is used.
• In a CAN bus system, what is the significance of arbitration and how does it handle multiple nodes attempting to send simultaneously?
• Which statement about radiology dose units is true?
• When simulating fault conditions with a regulated bench supply and electronic load, which symptom would indicate a short circuit?
• Which feature reduces ambiguity in reports about incidental findings?
• What is the importance of unit consistency in diagnostic data and how can you enforce it?
• What is a major safety concern with gadolinium-based contrast and how should risk be managed?
• In data fusion strategies, what is the role of the baseline?
• A sensor output is 0-5 V with ideal transfer 0 V at 0°C and 5 V at 100°C. What temperature corresponds to 2.5 V?
• Which organization holds the tactical control over DOD personnel during an Incident of National Significance in OCONUS?
• What is the primary objective of the 'execute tests and collect data' phase?
• Which setup is used to emulate fault conditions on a power subsystem during diagnostics?
• Explain diagnostic coverage in safety-critical systems.
• What is the clinical utility of high-sensitivity troponin assays, and how do serial measurements aid in diagnosis?
• Which statement best describes alpha radiation?
• Which factors influence laboratory reference intervals?
• What is the best shielding for beta radiation?
• What does the signal-to-noise ratio compare in diagnostic signal processing?
• Which statement distinguishes the Photoelectric Effect from Compton Scattering?
• What is the purpose of end-to-end diagnostic testing in a system with multiple subsystems?
• Which phase is labeled 'Safe to Move' in the C-WMD sequence?
• How would you verify calibration of a pressure transducer used in a diagnostics workflow?
• Which option lists the exact trio required for triage uploads?
• In validating a diagnostic algorithm, why is testing edge cases important?
• What is the typical management approach when a test result falls into a grey zone?
• What is MALDI-TOF used for?
• How does pre-test probability affect diagnostic testing decisions?
• Which statement correctly describes sensitivity and specificity in diagnostic testing?
• What does the neutron multiplication factor K represent in criticality theory?
• Which statement about mass and energy in nuclear processes is correct?
• What approach is used to locate faults in a wiring system when a fault is suspected?
• Which statement best describes the impact of MALDI-TOF on infectious disease management?
• How would you use a scatter matrix to identify correlations between sensor readings for diagnostics?
• What is the primary cause of calibration drift in DAQ systems?
• Which type of gadolinium-based contrast agent is preferred to minimize gadolinium deposition risk?
• Which equation represents dose as the product of rate and time?
• Why is impedance matching important in high-speed diagnostic interfaces (e.g., 100 ohm CAN differential pair)?
• What is the significance of ground loops and how to diagnose them?
• In the IAEA categorization, how many categories exist and how many are typically of primary concern?
• What is the difference between a short-circuit fault and an open-circuit fault in wiring, and how do you locate them?
• Which statement correctly describes calcium interpretation in laboratory tests?