Limits, Fits & Tolerances interview questions

1. A.letter (uppercase for holes, lowercase for shafts) that fixes the position of the tolerance zone relative to the basic size
2. B.GO gauge checks all dimensions together as a full-form envelope at MMC, while NO-GO checks each dimension separately at LMC
3. C.hole kept at H (zero lower deviation) and the fit obtained by varying the shaft, preferred because holes are made with standard drills and reamers
4. D.shaft always larger than hole, such as H7/p6 for a press fit and H7/s6 for a shrink fit that transmits torque without a key

Answer + AI explanation with Pro

1. A.Hole basis system
2. B.Transition fit
3. C.Clearance fit
4. D.Taylor's principle of gauging

Answer + AI explanation with Pro

1. A.Hole basis system — shaft always larger than hole, such as H7/p6 for a press fit and H7/s6 for a shrink fit that transmits torque without a key
2. B.Hole basis system — shaft always smaller than hole, such as H7/g6 for sliding spindles and H8/f7 for running bearings
3. C.Hole basis system — hole kept at H (zero lower deviation) and the fit obtained by varying the shaft, preferred because holes are made with standard drills and reamers
4. D.Hole basis system — tolerance grade IT01 to IT18 fixing the width of the zone, with IT5–IT7 for fits, IT8–IT11 for general machining and IT12 upward for raw processes

Answer + AI explanation with Pro

1. A.letter (uppercase for holes, lowercase for shafts) that fixes the position of the tolerance zone relative to the basic size
2. B.arithmetic mean deviation of the profile from its mean line, typically 0.8 µm for ground bearing seats, 1.6 for fine turning and 3.2 for general machining
3. C.tolerance zones overlap so the assembly may be slightly tight or loose, such as H7/k6 for locating gears and pulleys that also carry a key
4. D.shaft always larger than hole, such as H7/p6 for a press fit and H7/s6 for a shrink fit that transmits torque without a key

Answer + AI explanation with Pro

1. A.Taylor's principle of gauging
2. B.Rz roughness
3. C.Clearance fit
4. D.Fundamental deviation

Answer + AI explanation with Pro

1. A.Fundamental deviation — letter (uppercase for holes, lowercase for shafts) that fixes the position of the tolerance zone relative to the basic size
2. B.Fundamental deviation — mean peak-to-valley height over five sampling lengths, about 4–7 times Ra and better at catching isolated scratches on sealing faces
3. C.Fundamental deviation — hole kept at H (zero lower deviation) and the fit obtained by varying the shaft, preferred because holes are made with standard drills and reamers
4. D.Fundamental deviation — tolerance zones overlap so the assembly may be slightly tight or loose, such as H7/k6 for locating gears and pulleys that also carry a key

Answer + AI explanation with Pro

1. A.letter (uppercase for holes, lowercase for shafts) that fixes the position of the tolerance zone relative to the basic size
2. B.hole kept at H (zero lower deviation) and the fit obtained by varying the shaft, preferred because holes are made with standard drills and reamers
3. C.tolerance grade IT01 to IT18 fixing the width of the zone, with IT5–IT7 for fits, IT8–IT11 for general machining and IT12 upward for raw processes
4. D.shaft always larger than hole, such as H7/p6 for a press fit and H7/s6 for a shrink fit that transmits torque without a key

Answer + AI explanation with Pro

1. A.Clearance fit
2. B.IT grade
3. C.Transition fit
4. D.Interference fit

Answer + AI explanation with Pro

1. A.IT grade — shaft always larger than hole, such as H7/p6 for a press fit and H7/s6 for a shrink fit that transmits torque without a key
2. B.IT grade — arithmetic mean deviation of the profile from its mean line, typically 0.8 µm for ground bearing seats, 1.6 for fine turning and 3.2 for general machining
3. C.IT grade — tolerance grade IT01 to IT18 fixing the width of the zone, with IT5–IT7 for fits, IT8–IT11 for general machining and IT12 upward for raw processes
4. D.IT grade — shaft always smaller than hole, such as H7/g6 for sliding spindles and H8/f7 for running bearings

Answer + AI explanation with Pro

1. A.shaft always larger than hole, such as H7/p6 for a press fit and H7/s6 for a shrink fit that transmits torque without a key
2. B.hole kept at H (zero lower deviation) and the fit obtained by varying the shaft, preferred because holes are made with standard drills and reamers
3. C.tolerance grade IT01 to IT18 fixing the width of the zone, with IT5–IT7 for fits, IT8–IT11 for general machining and IT12 upward for raw processes
4. D.shaft always smaller than hole, such as H7/g6 for sliding spindles and H8/f7 for running bearings

Answer + AI explanation with Pro

1. A.Clearance fit
2. B.Interference fit
3. C.Surface roughness Ra
4. D.Taylor's principle of gauging

Answer + AI explanation with Pro

1. A.Clearance fit — shaft always smaller than hole, such as H7/g6 for sliding spindles and H8/f7 for running bearings
2. B.Clearance fit — hole kept at H (zero lower deviation) and the fit obtained by varying the shaft, preferred because holes are made with standard drills and reamers
3. C.Clearance fit — tolerance grade IT01 to IT18 fixing the width of the zone, with IT5–IT7 for fits, IT8–IT11 for general machining and IT12 upward for raw processes
4. D.Clearance fit — GO gauge checks all dimensions together as a full-form envelope at MMC, while NO-GO checks each dimension separately at LMC

Answer + AI explanation with Pro

1. A.hole kept at H (zero lower deviation) and the fit obtained by varying the shaft, preferred because holes are made with standard drills and reamers
2. B.GO gauge checks all dimensions together as a full-form envelope at MMC, while NO-GO checks each dimension separately at LMC
3. C.tolerance zones overlap so the assembly may be slightly tight or loose, such as H7/k6 for locating gears and pulleys that also carry a key
4. D.tolerance grade IT01 to IT18 fixing the width of the zone, with IT5–IT7 for fits, IT8–IT11 for general machining and IT12 upward for raw processes

Answer + AI explanation with Pro

1. A.Transition fit
2. B.Hole basis system
3. C.IT grade
4. D.Taylor's principle of gauging

Answer + AI explanation with Pro

1. A.Transition fit — arithmetic mean deviation of the profile from its mean line, typically 0.8 µm for ground bearing seats, 1.6 for fine turning and 3.2 for general machining
2. B.Transition fit — hole kept at H (zero lower deviation) and the fit obtained by varying the shaft, preferred because holes are made with standard drills and reamers
3. C.Transition fit — shaft always larger than hole, such as H7/p6 for a press fit and H7/s6 for a shrink fit that transmits torque without a key
4. D.Transition fit — tolerance zones overlap so the assembly may be slightly tight or loose, such as H7/k6 for locating gears and pulleys that also carry a key

Answer + AI explanation with Pro

1. A.tolerance grade IT01 to IT18 fixing the width of the zone, with IT5–IT7 for fits, IT8–IT11 for general machining and IT12 upward for raw processes
2. B.shaft always larger than hole, such as H7/p6 for a press fit and H7/s6 for a shrink fit that transmits torque without a key
3. C.hole kept at H (zero lower deviation) and the fit obtained by varying the shaft, preferred because holes are made with standard drills and reamers
4. D.shaft always smaller than hole, such as H7/g6 for sliding spindles and H8/f7 for running bearings

Answer + AI explanation with Pro

1. A.Fundamental deviation
2. B.Interference fit
3. C.Rz roughness
4. D.IT grade

Answer + AI explanation with Pro

1. A.Interference fit — shaft always larger than hole, such as H7/p6 for a press fit and H7/s6 for a shrink fit that transmits torque without a key
2. B.Interference fit — hole kept at H (zero lower deviation) and the fit obtained by varying the shaft, preferred because holes are made with standard drills and reamers
3. C.Interference fit — tolerance zones overlap so the assembly may be slightly tight or loose, such as H7/k6 for locating gears and pulleys that also carry a key
4. D.Interference fit — GO gauge checks all dimensions together as a full-form envelope at MMC, while NO-GO checks each dimension separately at LMC

Answer + AI explanation with Pro

1. A.shaft always larger than hole, such as H7/p6 for a press fit and H7/s6 for a shrink fit that transmits torque without a key
2. B.arithmetic mean deviation of the profile from its mean line, typically 0.8 µm for ground bearing seats, 1.6 for fine turning and 3.2 for general machining
3. C.tolerance grade IT01 to IT18 fixing the width of the zone, with IT5–IT7 for fits, IT8–IT11 for general machining and IT12 upward for raw processes
4. D.GO gauge checks all dimensions together as a full-form envelope at MMC, while NO-GO checks each dimension separately at LMC

Answer + AI explanation with Pro

1. A.Rz roughness
2. B.Fundamental deviation
3. C.Transition fit
4. D.Surface roughness Ra

Answer + AI explanation with Pro

1. A.Surface roughness Ra — letter (uppercase for holes, lowercase for shafts) that fixes the position of the tolerance zone relative to the basic size
2. B.Surface roughness Ra — shaft always smaller than hole, such as H7/g6 for sliding spindles and H8/f7 for running bearings
3. C.Surface roughness Ra — arithmetic mean deviation of the profile from its mean line, typically 0.8 µm for ground bearing seats, 1.6 for fine turning and 3.2 for general machining
4. D.Surface roughness Ra — tolerance zones overlap so the assembly may be slightly tight or loose, such as H7/k6 for locating gears and pulleys that also carry a key

Answer + AI explanation with Pro

1. A.shaft always smaller than hole, such as H7/g6 for sliding spindles and H8/f7 for running bearings
2. B.GO gauge checks all dimensions together as a full-form envelope at MMC, while NO-GO checks each dimension separately at LMC
3. C.letter (uppercase for holes, lowercase for shafts) that fixes the position of the tolerance zone relative to the basic size
4. D.arithmetic mean deviation of the profile from its mean line, typically 0.8 µm for ground bearing seats, 1.6 for fine turning and 3.2 for general machining

Answer + AI explanation with Pro

1. A.Hole basis system
2. B.Taylor's principle of gauging
3. C.Surface roughness Ra
4. D.Clearance fit

Answer + AI explanation with Pro

1. A.Taylor's principle of gauging — GO gauge checks all dimensions together as a full-form envelope at MMC, while NO-GO checks each dimension separately at LMC
2. B.Taylor's principle of gauging — mean peak-to-valley height over five sampling lengths, about 4–7 times Ra and better at catching isolated scratches on sealing faces
3. C.Taylor's principle of gauging — hole kept at H (zero lower deviation) and the fit obtained by varying the shaft, preferred because holes are made with standard drills and reamers
4. D.Taylor's principle of gauging — tolerance zones overlap so the assembly may be slightly tight or loose, such as H7/k6 for locating gears and pulleys that also carry a key

Answer + AI explanation with Pro

1. A.arithmetic mean deviation of the profile from its mean line, typically 0.8 µm for ground bearing seats, 1.6 for fine turning and 3.2 for general machining
2. B.shaft always larger than hole, such as H7/p6 for a press fit and H7/s6 for a shrink fit that transmits torque without a key
3. C.GO gauge checks all dimensions together as a full-form envelope at MMC, while NO-GO checks each dimension separately at LMC
4. D.mean peak-to-valley height over five sampling lengths, about 4–7 times Ra and better at catching isolated scratches on sealing faces

Answer + AI explanation with Pro

1. A.IT grade
2. B.Rz roughness
3. C.Surface roughness Ra
4. D.Fundamental deviation

Answer + AI explanation with Pro

1. A.Rz roughness — mean peak-to-valley height over five sampling lengths, about 4–7 times Ra and better at catching isolated scratches on sealing faces
2. B.Rz roughness — shaft always smaller than hole, such as H7/g6 for sliding spindles and H8/f7 for running bearings
3. C.Rz roughness — tolerance zones overlap so the assembly may be slightly tight or loose, such as H7/k6 for locating gears and pulleys that also carry a key
4. D.Rz roughness — arithmetic mean deviation of the profile from its mean line, typically 0.8 µm for ground bearing seats, 1.6 for fine turning and 3.2 for general machining

Answer + AI explanation with Pro