Quality Control & Inspection Flashcards
7 cards from real CDT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Quality Control & Inspection flashcards as text
On a drawing using third-angle projection, the right-side view is placed:
Answer: To the right of the front view
In third-angle projection (standard in the US), the right-side view is projected to the right of the front view.
A QC checklist item requires verifying that all surface finish symbols on a drawing are consistent with the specified manufacturing process. This is an example of:
Answer: Process-drawing compatibility review
Checking that surface finish callouts are achievable and consistent with the specified process is a process-drawing compatibility review.
When a drawing tolerance stack-up analysis reveals that worst-case assembly clearance is negative, the correct response is to:
Answer: Tighten individual part tolerances or redesign to achieve positive clearance
A negative worst-case clearance means parts can physically interfere, requiring tighter tolerances or a design change before production.
Which symbol on a GD&T drawing indicates that a cylindrical tolerance zone is to be applied?
Answer: The diameter symbol ⌀ preceding the tolerance value
Placing the diameter symbol ⌀ before a tolerance value in a feature control frame indicates a cylindrical (diametral) tolerance zone.
During a CAD model QC review, a technician finds that the 3D model and the 2D drawing have conflicting hole depths. Which document is typically the governing authority under ASME Y14.41 model-based definition?
Answer: The 3D annotated model governs if designated as the master
Under ASME Y14.41, when a 3D annotated model is designated as the master reference, the model dataset takes precedence over 2D derived drawings.
A drawing calls out a positional tolerance of ⌀0.010 at maximum material condition (MMC) for a pin. If the pin is produced at its least material condition (LMC), the allowable positional tolerance:
Answer: Increases by the departure from MMC
Under MMC modifier rules, as the feature departs from MMC toward LMC, the bonus tolerance equals the departure amount, increasing total allowable position.
What is the purpose of a 'checker stamp' or 'checker approval' block on an engineering drawing?
Answer: To confirm that an independent reviewer has verified the drawing for accuracy and completeness
A checker stamp confirms that a qualified person independent of the originator has reviewed the drawing for errors, omissions, and standard compliance.