MEC322 - MIDTERM | QUESTIONS AND ANSWERS | 2026 UPDATE | WITH COMPLETE
SOLUTION
Tolerance - (ANSWER)Total amount a dimension can be varied.
Unilateral vs. Bilateral Tolerance - (ANSWER)Bilateral - variation can be both positive and negative
Unilateral - variation in only one direction
3 Types of Part Fitting - (ANSWER)Clearance - Allows for rotation and sliding between parts
Interference - External fit of one part is larger than internal fit of other part
Transition - Small clearance or interference that allows for accurate location of mating parts
Difference Between Accuracy and Precision - (ANSWER)Accuracy - Closeness between measurements
and standards
Precision - Closeness between all measurements made
Inspections by Variables vs. Attributes - (ANSWER)Variables - measured by appropriate measuring
instruments
Attributes - part dimensions are 'gauged' to determine if they are within tolerance
Acceptance Sampling - (ANSWER)Where a product is received and compared to a desired product.
Two Types of Limit Gage - (ANSWER)GO - Check dimension at highest material condition (smallest hole)
NO GO - Check dimension at lowest material (larger hole)
, MEC322 - MIDTERM | QUESTIONS AND ANSWERS | 2026 UPDATE | WITH COMPLETE
SOLUTION
Stylus Instrument - (ANSWER)Contact or non-contact tip that is used to measure the surface
Types of CMM Probes - (ANSWER)Fixed - solid piece of material
Touch-trigger - sends electrical signal to CMM when probe touches material
Optical - use light to measure surface distance
Scanning Lasers - (ANSWER)Where a laser beam is deflected by a rotating mirror to 'sweep' beam of
light past an object
Machine Vision - (ANSWER)Where image information is received, processed and interpreted by a
computer
Expendable Molds - (ANSWER)Must be destroyed to remove casting
Permanent Molds - (ANSWER)Can be used over and over for many castings
Cope & Drag (casting terms) - (ANSWER)Cope - upper half of mold
Drag - lower half
Flask (casting term) - (ANSWER)Box that the mold is contained in
Pattern (casting term) - (ANSWER)Shape of the part
Forming Mold Cavity - (ANSWER)Packing sand around a pattern that has shape of part.
SOLUTION
Tolerance - (ANSWER)Total amount a dimension can be varied.
Unilateral vs. Bilateral Tolerance - (ANSWER)Bilateral - variation can be both positive and negative
Unilateral - variation in only one direction
3 Types of Part Fitting - (ANSWER)Clearance - Allows for rotation and sliding between parts
Interference - External fit of one part is larger than internal fit of other part
Transition - Small clearance or interference that allows for accurate location of mating parts
Difference Between Accuracy and Precision - (ANSWER)Accuracy - Closeness between measurements
and standards
Precision - Closeness between all measurements made
Inspections by Variables vs. Attributes - (ANSWER)Variables - measured by appropriate measuring
instruments
Attributes - part dimensions are 'gauged' to determine if they are within tolerance
Acceptance Sampling - (ANSWER)Where a product is received and compared to a desired product.
Two Types of Limit Gage - (ANSWER)GO - Check dimension at highest material condition (smallest hole)
NO GO - Check dimension at lowest material (larger hole)
, MEC322 - MIDTERM | QUESTIONS AND ANSWERS | 2026 UPDATE | WITH COMPLETE
SOLUTION
Stylus Instrument - (ANSWER)Contact or non-contact tip that is used to measure the surface
Types of CMM Probes - (ANSWER)Fixed - solid piece of material
Touch-trigger - sends electrical signal to CMM when probe touches material
Optical - use light to measure surface distance
Scanning Lasers - (ANSWER)Where a laser beam is deflected by a rotating mirror to 'sweep' beam of
light past an object
Machine Vision - (ANSWER)Where image information is received, processed and interpreted by a
computer
Expendable Molds - (ANSWER)Must be destroyed to remove casting
Permanent Molds - (ANSWER)Can be used over and over for many castings
Cope & Drag (casting terms) - (ANSWER)Cope - upper half of mold
Drag - lower half
Flask (casting term) - (ANSWER)Box that the mold is contained in
Pattern (casting term) - (ANSWER)Shape of the part
Forming Mold Cavity - (ANSWER)Packing sand around a pattern that has shape of part.
