ACS Instrument Practice Test

These questions are part of the practice quiz. Start practicing

• What happens to an air parcel that rises expands and cools?
• For preflight planning, which are acceptable weather products and resources?
• What reference compound is used to calibrate chemical shift scale in NMR?
• Which compass error is described as the compass card swinging back and forth around the heading direction?
• Which of the following is a privilege of operating under IFR?
• Mist is the intermediate stage between which two visibility conditions?
• Which leading-edge feature is described as an anti-icing fluid leakage mechanism on some aircraft?
• Which system includes electrical power to electronic flight instrument displays, the transponder, and ADS-B?
• In an unstable atmosphere, which characteristics are likely?
• What condition is typically required for precipitation to begin?
• Which statement correctly distinguishes weather reports from forecasts?
• Which factor can contribute to peak tailing in HPLC besides stationary-phase interactions?
• Which fog type forms almost exclusively during clear nights with little to no winds and a small temp/dew point spread over land?
• In IR spectroscopy, what information does the fingerprint region provide, and why is it useful?
• What is signal averaging and how does it affect measurement quality?
• When planning with GPS and WAAS, how should you treat the alternate minimums for planning?
• Which item is classified as a de-icing measure on typical light aircraft components?
• Which practice most effectively reduces random noise by averaging?
• Which factor most contributes to nonlinear detector response at high analyte concentrations?
• When interpreting departure, arrival, en route, and approach procedures, which approach is most appropriate?
• What is a widely used signal-to-noise threshold for determining an LOD?
• Which direction does surface wind move around a low-pressure system in the Northern Hemisphere?
• Under BasicMed, which limitation applies?
• What is the proper distinction between heat and temperature?
• Define retention factor k' in chromatography and explain its significance.
• What is the primary difference between proficiency and currency?
• Why is matrix matching important in inductively coupled plasma (ICP-OES/MS) calibration?
• Which statement best describes clear icing?
• What wind develops during the day when the land heats faster than the water?
• ADS-B stands for what?
• Which wind type is formed when cold air descends into a valley and pushes warm air up the slopes?
• Which of the following indicates stable air?
• Which items are included in the Environment element of decision-making?
• In UV-Vis spectroscopy, what are common sources of stray light and how do they affect measurements?
• What is the typical proton NMR chemical shift range for aliphatic protons, aromatic protons, and aldehydic protons?
• Which type of turbulence is caused by obstacles such as buildings or mountains?
• In chromatography, what role does the stationary phase play in separation?
• Which publication lists FAA weather information and guidance for flight planning?
• What is super-cooled water?
• What is the standard potential E° used with to predict redox direction and magnitude?
• Deviation from the standard lapse rate can significantly affect which of the following weather phenomena?
• Which instruments are part of the pitot-static instrument system?
• Which statement best describes a stable atmospheric condition?
• Which statement correctly describes three common GC stationary-phase types and how polarity affects separation?
• In HPLC, how does temperature influence backpressure and separation performance?
• How does baseline noise influence the determination of LOD and LOQ?
• In UV–Visible spectroscopy, what is scattering and how can it be distinguished from absorption?
• In a Cessna 172, which anti-icing features are indicated by the manufacturer?
• How does fragmentation in MS help with structural elucidation?
• Under 14 CFR 61.65, which is a required instrument rating component?
• If it has been more than 12 months since last IFR currency, what must you do?
• Condensation nuclei are particles that promote phase changes in moist air. What are they usually composed of?
• Under BasicMed, what is the maximum aircraft weight allowed?
• What is the purpose of quality control (QC) samples in routine instrumental analysis?
• During cruise with icing conditions, what is the recommended action?
• What are the main adverse effects of airframe icing on an aircraft?
• What is the purpose of gradient elution in HPLC with respect to separating peaks?
• Which forces determine wind at the Earth's surface?
• What is high-resolution mass spectrometry (HRMS) and what advantage does it provide in molecular identification?
• What is the function of an FID in gas chromatography, and which compounds does it respond to most strongly?
• Which statement aligns with determining whether an alternate airport is required?
• Which cloud type is associated with convection and instability, characterized by being lumpy?
• What is chromatographic resolution Rs and how is it interpreted for baseline separation?
• In a G1000 glass cockpit, which system provides attitude information?
• Explain deconvolution in spectral analysis and when to apply.
• What are personal minimums in aviation?
• How can the number of theoretical plates N be determined from a chromatogram?
• Compare isocratic, gradient, and step-gradient elution strategies in HPLC and typical use cases.
• Diversion decisions depend on many factors. Which statement is valid?
• What are the three stages of a thunderstorm?
• In MS/MS SRM, why is monitoring a specific precursor-to-product ion transition beneficial for selectivity?
• Which flight instrument system uses gyroscopic or vacuum-powered instruments?
• What is a practical method to prepare for analyzing weather implications during flight planning?
• Which statement best differentiates potentiometry from voltammetry and gives an example of each in analytical chemistry?
• What is t0 (dead time) in chromatography, and how is it determined?
• Which statement about the Beer's law equation relating absorbance to concentration is true?
• Which type of icing occurs when there is visible moisture and the air temperature is between approximately 0C and -20C?
• How does frost affect airflow over an airfoil?
• Haze is defined as a concentration of dry material suspended in stable air. Which of the following describes this condition?
• In proton NMR, how does spin-spin coupling manifest and what information does a coupling constant reveal?
• Peak tailing in HPLC is typically caused by which factor?
• IFR recency: If it has been more than 6 months but less than 12 months since your last IFR currency, what must you do to regain currency?
• What are standard alternate minimums for a precision approach?
• What does backpressure indicate in an HPLC system and what factors influence it?
• Frost formation occurs under which atmospheric conditions?
• Describe isocratic and gradient elution in HPLC and when each is preferred.
• In the presence of severe turbulence, what is the recommended action?
• Define LOD and LOQ and give their typical signal-to-noise criteria.
• In UV-Vis, if a measurement shows nonlinearity due to high concentration, what change would help restore linearity?
• Why is calibration important in mass spectrometry, and how is mass accuracy achieved?
• Which statement correctly describes anti-icing systems?
• Which nucleus generally provides higher sensitivity in NMR and why?
• Why is 13C NMR often observed with longer acquisition times or polarization techniques?
• In chromatography, which term best defines the ability to distinguish analyte signals from interfering substances?
• What is the signal-to-noise ratio and how can it be improved in spectroscopic measurements?
• Outline a basic method validation plan for an instrument used to measure trace metals by AAS. Which elements are typically included?
• In the Northern Hemisphere, the Coriolis force deflects wind to which direction?
• In UV-Vis instrumentation, what is the difference between a photodiode array detector and a photomultiplier tube detector?
• What is a control chart and how is it used to monitor instrument performance?
• What is the minimum instrument time required for the instrument rating per 61.65(c)?
• Which statement about ionization in mass spectrometry is true?
• Under BasicMed, which statement is true?
• What is the recommended approach to planning tools and backups?
• Why are blanks critical in instrument calibration?
• Why are reference materials used in method validation?
• What is the primary purpose of including blanks in a calibration and validation plan?
• Distinguish internal standard from external standard in calibration schemes.
• During a roll, what action is required to counteract adverse yaw?
• In analytical instrumentation, what does dynamic range describe?
• On a clear day, if forecast crosswinds are higher than your personal minimums allow, what is the recommended action?
• What wind develops at night when the land cools faster than the adjacent water?
• In mass spectrometry, what does the m/z value represent?
• Unfamiliar aircraft or avionics: Which document provides guidance on handling unfamiliar airplanes with different flight displays?
• Which factors are included when preparing a cross-country flight plan to estimate time en route and fuel?
• In mass spectrometry, what is the molecular ion (M+) and how does it differ from the base peak?
• Which instrument measures altitude in flight?
• In tandem mass spectrometry (MS/MS), SRM stands for Selected Reaction Monitoring. What is its primary role in quantitative analysis?
• What is the standard lapse rate for temperature with height in the standard atmosphere?
• Smoke tends to form primarily in which conditions?
• What is calibration transfer and why is it important in laboratories with multiple instruments?
• Which publication source should be consulted for information about runway or taxiway closures and NOTAMs?
• Is a Cessna 172 permitted to fly into known icing conditions according to the manufacturer?
• In method validation for analytical instruments, what do LOD and LOQ stand for?
• In 1H NMR, what does a doublet indicate about neighboring protons?
• Which statement accurately describes a cold front?
• Which is an aviation weather briefing resource?
• Which of the following is NOT typically a source of deviation from linearity in UV-Vis measurements under Beer's law?
• Cloud formation is normally caused by which process?
• What is the standard sea‑level atmospheric pressure used in aviation?
• Which resource is recommended for weather information on dynamic weather days?
• Which item is NOT required to be recorded in a logbook entry to be acceptable?
• What is an internal standard, and when should you use one in quantitative chromatography?
• Within the previous 6 months, IFR currency requires logging how many instrument approaches?
• What is an example of personal weather minimums for takeoff and approach?
• In chromatography, what does tR represent and what does t0 represent in retention factor calculations?
• A temperature inversion is best described as...
• What is the purpose of using a blank in calibration curves in spectrophotometry?
• Variation refers to what, and what is the mnemonic for the sign of variation?
• In atomic absorption spectroscopy, compare flame AAS and graphite furnace AAS (GFA) in sensitivity and sample consumption.
• Which factor is directly related to go/no-go decisions when weather is otherwise favorable but crosswinds are high?
• In gas chromatography, which statement correctly describes split injection?
• Which statement about FIS-B is true?
• What happens when the analyte polarity closely matches the stationary phase polarity in GC?
• Which navigation systems include RNAV, GPS, WAAS, FMS, and autopilot?
• The Automatic Flight Control System (AFCS) procedures should be reviewed when:
• Where do you obtain fuel burn information for planning?
• Explain the standard addition method and provide a scenario where it is preferred.
• What does baseline separation mean in chromatography, in terms of resolution Rs?
• Recalculate fuel reserves based on a scenario provided by the evaluator. What is the purpose of this recalculation?
• What is the purpose of a blank in UV-Vis measurement, and how is it used in calibration?
• Around a high-pressure system at the surface, the wind tends to be which pattern?
• Which term describes the turning error known as Undershoot North Overshoot South (UNOS)?
• What is the standard sea-level temperature used in aviation standard atmosphere?
• What is the primary purpose of the PAVE checklist?
• How is linearity of a calibration curve assessed, and what are common causes of nonlinear response?
• What is a chemical shift and in what units is it reported?
• How is mass accuracy typically achieved in mass spectrometry?
• Under the 1-2-3 rule, when is an alternate not required?
• Which navigation aids are associated with VOR, DME, ILS, and marker beacon indicators?
• What does the Pilot element emphasize?
• In instrument practice, which statement about IFR flight plan filing is accurate?
• What is a typical use of an electronic flight bag (EFB) in training?
• Baseline correction is applied to data to do which of the following?
• Why might you choose a polar stationary phase for separating polar analytes in GC?
• Which fuel planning guideline is recommended?
• Which metric is commonly used to quantify column efficiency?
• In PAVE risk assessment, external pressures refer to factors such as which of the following?
• Relative humidity and dew point definitions: Which statement is true?
• If your GPS lacks fault-detection and exclusion (FDE) capability and RAIM preflight validation has not been performed, what must you ensure about the alternate?
• What is the purpose of the instrument dynamic range in quantitative methods?
• Which statement correctly differentiates anti-icing from de-icing?
• What is the purpose of TIS-B in ADS-B?
• In the Terminal Procedures, what does the black triangle indicate?
• True or false: Frost should be removed before takeoff.
• Which statement best describes ATC limitations in flight planning?
• Which statement describes an Arctic air mass?
• Baseline drift in measurements is typically described as?
• What is the standard potential E° and how is it used to predict redox behavior?