Task Group 142 Tolerances Practice Test

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• Which tolerance requires a cylindrical tolerance zone coaxial with a datum axis?
• What is the annual gantry rotation isocenter tolerance?
• Which statement best defines perpendicularity and angularity?
• What is the monthly gantry/collimator angle indicator tolerance?
• What is the annual electron output constancy vs gantry angle tolerance?
• What is the annual electron symmetry change tolerance from baseline?
• What is the annual X-ray/electron output calibration tolerance (TG-51)?
• Which option correctly states the annual requirement for following manufacturer's test procedures?
• Which statement about a basic dimension is accurate?
• Which statement correctly describes the annual enhanced dynamic or gated delivery dose tolerance?
• Which statement best reflects the laser localization tolerances for Non-IMRT, IMRT, and SRS-SBRT?
• What is the effect of a projected tolerance zone on mating part clearance at projection height?
• What is the annual collimator rotation isocenter tolerance?
• Which statement differentiates circular runout from total runout?
• Which QA mechanical test is ALWAYS 2 mm regardless of technique?
• What is the annual couch rotation isocenter tolerance?
• What does profile of a surface refer to in GD&T?
• How does "concentricity" differ from "position" tolerance?
• How is a datum reference frame used to evaluate a pattern of holes?
• What is the electron output constancy requirement?
• Which tolerance is expressed as a linear millimeter value for table movement?
• To verify multiple holes in a pattern, what provides the orientation and location reference?
• How would you evaluate a hole's true position with datums A, B, and C?
• What is the monthly typical dose rate output constancy tolerance?
• Which tolerance is used to specify CT number accuracy for water in imaging QA?
• What is the annual electron and X-ray output constancy vs gantry angle tolerance?
• What is the monthly distance tolerance between lasers and the front pointer?
• The annual enhanced dynamic or gated delivery dose tolerance is described as which of the following?
• What is the annual spot check of field size dependent output factors tolerance?
• Which tolerance is defined as 1% for TBI and 1 mm PDD shift for TSET?
• What is the annual TBI/TSET output calibration tolerance?
• Which two electron beam parameters have a 1% annual tolerance from baseline?
• In respiratory gating, the annual beam output constancy tolerance is expressed as what percentage?
• In respiratory gating, the annual dose delivery accuracy tolerance is best described as within MU of the expected delivery?
• What is compound position tolerance?
• What is the annual X-ray output constancy vs dose rate tolerance?
• Which tolerance includes both a linear and an angular component?
• What is the annual arc mode (expected MU/deg) tolerance?
• Which tolerances govern how far a feature's centerline or surface is from a datum reference?
• True position tolerance is evaluated relative to which frame?
• What is the annual electron monitor unit linearity tolerance?
• What is the X-ray monitor unit linearity tolerance for MU values ≤5?
• What is required for beam-on indicator?
• What is the monthly symmetric jaw position indicator tolerance?
• How does a GD&T callout indicate that a feature must be located within a cylindrical zone rather than a square zone?
• For respiratory gating, what is the annual beam output constancy tolerance?
• What is the requirement for the door closing safety system?
• What is the difference between 'true position' and 'actual position'?
• Which statement correctly distinguishes flatness from straightness?
• What is the annual wedge transmission factor constancy tolerance?
• What is the monthly beam output constancy tolerance for respiratory gating?
• What is the annual beam output constancy tolerance for respiratory gating?
• What does true position refer to in GD&T?
• Which monthly QA tolerance is listed for the electron beam output?
• What is the role of a datum axis in a cylindrical part?
• How is LMC defined for a shaft feature?
• What is the relationship between datums and measurement methods?
• Among Non-IMRT, IMRT, and SRS-SBRT, which modality has the smallest daily laser localization tolerance?
• Which modality has the strictest daily laser localization tolerance?
• Which element is NOT part of a standard feature control frame?
• Which statement best describes a datum feature?
• What is the result of applying a position tolerance to a hole with an MMC modifier?
• What is the monthly gating interlock tolerance?
• What is the annual PDD or TMR and OAF constancy tolerance?
• What is the annual X-ray flatness change from baseline tolerance?
• What is the annual electron applicator interlocks tolerance?
• What is the monthly phase/amplitude beam control tolerance?
• What is the effect of the M modifier in a GD&T callout?
• What is the annual electron flatness change tolerance from baseline?
• What is the annual tolerance for electron and X-ray output constancy with respect to gantry angle?
• What is the daily ODI tolerance at isocenter for Non-IMRT, IMRT, and SRS-SBRT?
• Which monthly QA tolerance applies to the photon beam profile constancy?
• How would you verify a part that uses a three-datum frame in production?
• Which tolerance is specified for CT number accuracy in water regions?
• Which tolerance category controls the actual shape of a feature boundary?
• When is a datum target necessary?
• Which monthly tolerance is specified for the gating interlock?
• In GD&T, regarding holes and shafts, which statement correctly describes MMC/LMC?
• How is concentricity evaluated?
• What is the daily X-ray output constancy tolerance?
• What is the significance of the "remainder of the surface is free of tolerances"?
• What is the monthly asymmetric jaw position indicator tolerance?
• Why is a basic dimension critical in a true-position callout?
• What is the monthly asymmetric light/radiation field coincidence tolerance on a side?
• Which statement about a datum is correct in GD&T terms?
• What is the monthly wedge placement accuracy tolerance?
• What is the annual X-ray output constancy vs gantry angle tolerance?
• How do you interpret a dimension labeled Ø0.010 in GD&T?
• What is the annual table top sag tolerance?
• Which statement correctly describes unilateral tolerances?
• Which tolerance describes the arc mode allowance in MU per degree?
• When would you use a true position callout on a hole feature?
• How often is the electron output constancy tolerance measured for most machines?
• What is the purpose of MMC in relation to position tolerances?
• What is the annual TBI/TSET accessories tolerance?
• Which tolerance has a value of 2 mm for the accessory tray position?
• What is 'runout' used to control on a mounting surface?
• What is the monthly electron beam energy constancy tolerance?
• What is required for audiovisual monitors?
• What is a datum target?
• What is the annual X-ray monitor unit linearity tolerance?
• Daily collimator size indicator tolerance for Non-IMRT, IMRT, and SRS-SBRT?
• What is the key safety QA requirement across ALL modalities?
• Which tolerance is expressed in millimeters for the annual QA tolerances?
• Which of the following describes the relationship between datums and measurement methods?
• How is a hole pattern evaluated against datums A and B?
• For SRS arc rotation mode, what is the tolerance for gantry angle vs delivered?
• Which tolerance describes the annual X-ray symmetry change from baseline?
• What is the annual enhanced dynamic or gated delivery dose tolerance expressed as?
• For respiratory gating, the annual dose delivery accuracy tolerance is within how many MU of the expected delivery?
• What is a datum axis?
• What are the three components of a standard feature control frame?
• Which description best characterizes the annual TBI/TSET mode tolerance?
• What is the role of a datum feature symbol in GD&T?
• Which statement best describes a three-datum frame in GD&T?
• What is the requirement for a radiation area monitor?
• What is the monthly accessory tray position tolerance?
• Which statement about a basic dimension is accurate?
• What is the monthly backup monitor chamber constancy tolerance?
• What is the monthly laser guard interlock test tolerance?
• Which tolerance is commonly described as walkout?
• How does a profile of a surface tolerance relate to form and orientation?
• What is the monthly electron output constancy tolerance?
• Which statement is true about safety system functionality?
• What is the monthly in-room respiratory monitoring system tolerance?
• What is the monthly light/radiation field coincidence tolerance on a side?
• What is the annual X-ray beam quality tolerance measured as PDD or TMR from baseline?
• How would you interpret a callout with 'Ø0.050' and a position tolerance '0.010 A B'?
• Which statement is NOT part of a standard feature control frame?
• Which tolerances govern the angular relationship, tilt, or alignment of features to datums?
• What is the annual SRS arc rotation mode tolerance (range 0.5-10 MU/deg)?
• What is the annual electron beam quality tolerance?
• The CT number accuracy tolerance for water is which value?
• How does a projected tolerance zone affect assembly clearance?
• Which statement best defines a datum in GD&T?
• What is the monthly X-ray output constancy tolerance?
• What is the monthly electron beam profile constancy tolerance?
• What does the term 'datum axis' refer to in GD&T?
• What is the requirement for the door interlock (beam off)?
• What is the purpose of a datum in GD&T?
• What is the annual X-ray beam quality (PDD or TMR) tolerance?
• When evaluating a hole pattern with datums A and B, what is required for each hole axis?
• How are datums chosen and ordered in a frame?
• What is a unilateral tolerance?
• Which tolerance is the monthly beam output constancy tolerance for respiratory gating?
• What is the annual TBI/TSET mode tolerance?
• In respiratory gating, the annual dose delivery accuracy tolerance is described as within how many MU of the expected delivery?
• What might be a reason to use a composite tolerance on a well cap or plug feature?
• Which statement best describes profile of a surface?
• How does GD&T separate form, orientation, and location tolerances?
• What is the monthly phase/amplitude beam control tolerance?
• What is the annual stereotactic accessories/lockouts tolerance?
• What is the annual requirement for following manufacturer's test procedures?
• Which tolerance applies to annual TBI/TSET output calibration?
• How is the height of a projected tolerance zone specified?
• What is the CT number accuracy tolerance for water?
• What is the annual output factors for electron applicators tolerance?
• When a hole has an MMC modifier, the actual tolerance is determined by:
• What is the monthly localizing laser tolerance?
• Which tolerance governs the symmetric jaw position indicator?
• What does the diameter symbol indicate in a GD&T frame?
• What is the monthly photon beam profile constancy tolerance?
• What is a bilateral tolerance?
• How is LMC defined for a hole feature?
• What is the monthly tolerance for latching of wedges and blocking tray?
• Which tolerance relates to the table sag, stated as 2 mm?
• What is the annual table travel maximum range tolerance (all directions)?
• Which of the following describes the CT number accuracy tolerance for water-equivalent materials?
• What is the annual table angle tolerance?
• How do you interpret a callout that uses a profile tolerance and a separate positional tolerance?
• What is the purpose of a datum target?
• What is the difference between 'profile of a line' and 'profile of a surface' in terms of control?
• Which monthly QA tolerance is specified for the backup monitor chamber constancy?
• What is the annual coincidence of radiation and mechanical isocenter tolerance?
• What is the annual enhanced dynamic or gated delivery dose tolerance?
• For SRS/SBRT procedures, what is the annual coincidence tolerance between radiation and mechanical isocenters?
• Which monthly tolerance category applies to interlock-related tests such as gating interlock?
• Which tolerance is identical across all modalities at isocenter?
• What is the monthly treatment couch position indicator tolerance?
• What is the monthly compensator placement accuracy tolerance?
• What is the requirement for stereotactic interlocks in SRS/SBRT?
• For holes, where does MMC occur?
• Which tolerance is defined as 2 mm or 1% on a side?
• Which tolerance is described with angular units rather than linear millimeters?
• Profile of a line controls which of the following?
• What is the difference between 'diameter' and 'distance' in tolerancing?
• Which tolerance describes the monthly phase/amplitude beam control?
• What scenario necessitates using a datum target?
• What is a projected tolerance zone used for?
• What is the monthly cross-hair centering (walkout) tolerance?
• Which monthly X-ray output constancy tolerance is specified?