27 CNC & Machining Practice questions from the Production & Plant bank, written for Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd.
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A.three locators on the primary face, two on the secondary and one on the tertiary restrain nine of twelve directional degrees of freedom before clamping
B.rapid traverse to a position at maximum speed versus straight-line cutting at the programmed feed rate
C.average flank wear land of 0.3 mm taken as end of tool life under ISO 3685, after which finish and dimensions drift
D.stored coordinate systems that place part zero relative to machine home, so one program runs on different fixtures
Answer + AI explanation with Pro
2. Which term means: "rapid traverse to a position at maximum speed versus straight-line cutting at the programmed feed rate"?
Junior
A.Flank wear criterion
B.Chatter
C.G00 versus G01
D.G02 and G03
Answer + AI explanation with Pro
3. Which statement is correct?
Junior
A.G00 versus G01 — three locators on the primary face, two on the secondary and one on the tertiary restrain nine of twelve directional degrees of freedom before clamping
B.G00 versus G01 — rapid traverse to a position at maximum speed versus straight-line cutting at the programmed feed rate
C.G00 versus G01 — M03 spindle clockwise, M05 spindle stop, M06 tool change, M08 coolant on and M30 program end with rewind
D.G00 versus G01 — circular interpolation clockwise and counter-clockwise, defined with an I, J, K centre offset or an R radius
Answer + AI explanation with Pro
4. What is G02 and G03?
Junior
A.circular interpolation clockwise and counter-clockwise, defined with an I, J, K centre offset or an R radius
B.rapid traverse to a position at maximum speed versus straight-line cutting at the programmed feed rate
C.plane-line-point sequence that establishes the part coordinate system on a probed component before any feature is measured
D.stored coordinate systems that place part zero relative to machine home, so one program runs on different fixtures
Answer + AI explanation with Pro
5. Which term means: "circular interpolation clockwise and counter-clockwise, defined with an I, J, K centre offset or an R radius"?
Junior
A.G02 and G03
B.G00 versus G01
C.Flank wear criterion
D.Work offsets G54–G59
Answer + AI explanation with Pro
6. Which statement is correct?
Junior
A.G02 and G03 — stored coordinate systems that place part zero relative to machine home, so one program runs on different fixtures
B.G02 and G03 — three locators on the primary face, two on the secondary and one on the tertiary restrain nine of twelve directional degrees of freedom before clamping
C.G02 and G03 — circular interpolation clockwise and counter-clockwise, defined with an I, J, K centre offset or an R radius
D.G02 and G03 — average flank wear land of 0.3 mm taken as end of tool life under ISO 3685, after which finish and dimensions drift
Answer + AI explanation with Pro
7. What is Common M-codes?
Junior
A.rapid traverse to a position at maximum speed versus straight-line cutting at the programmed feed rate
B.three locators on the primary face, two on the secondary and one on the tertiary restrain nine of twelve directional degrees of freedom before clamping
C.plane-line-point sequence that establishes the part coordinate system on a probed component before any feature is measured
D.M03 spindle clockwise, M05 spindle stop, M06 tool change, M08 coolant on and M30 program end with rewind
Answer + AI explanation with Pro
8. Which term means: "M03 spindle clockwise, M05 spindle stop, M06 tool change, M08 coolant on and M30 program end with rewind"?
Junior
A.Chatter
B.Common M-codes
C.G00 versus G01
D.Work offsets G54–G59
Answer + AI explanation with Pro
9. Which statement is correct?
Junior
A.Common M-codes — M03 spindle clockwise, M05 spindle stop, M06 tool change, M08 coolant on and M30 program end with rewind
B.Common M-codes — average flank wear land of 0.3 mm taken as end of tool life under ISO 3685, after which finish and dimensions drift
C.Common M-codes — G41 left or G42 right offset that lets the program follow the part profile while tool wear is corrected in the offset table
D.Common M-codes — rapid traverse to a position at maximum speed versus straight-line cutting at the programmed feed rate
Answer + AI explanation with Pro
10. What is Work offsets G54–G59?
Junior
A.three locators on the primary face, two on the secondary and one on the tertiary restrain nine of twelve directional degrees of freedom before clamping
B.circular interpolation clockwise and counter-clockwise, defined with an I, J, K centre offset or an R radius
C.stored coordinate systems that place part zero relative to machine home, so one program runs on different fixtures
D.self-excited vibration between tool and work that leaves a wavy surface, cured by changing spindle speed per the stability lobe diagram or reducing overhang
Answer + AI explanation with Pro
11. Which term means: "stored coordinate systems that place part zero relative to machine home, so one program runs on different fixtures"?
Junior
A.G02 and G03
B.Flank wear criterion
C.Chatter
D.Work offsets G54–G59
Answer + AI explanation with Pro
12. Which statement is correct?
Junior
A.Work offsets G54–G59 — stored coordinate systems that place part zero relative to machine home, so one program runs on different fixtures
B.Work offsets G54–G59 — plane-line-point sequence that establishes the part coordinate system on a probed component before any feature is measured
C.Work offsets G54–G59 — M03 spindle clockwise, M05 spindle stop, M06 tool change, M08 coolant on and M30 program end with rewind
D.Work offsets G54–G59 — self-excited vibration between tool and work that leaves a wavy surface, cured by changing spindle speed per the stability lobe diagram or reducing overhang
Answer + AI explanation with Pro
13. What is Cutter radius compensation?
Mid
A.G41 left or G42 right offset that lets the program follow the part profile while tool wear is corrected in the offset table
B.circular interpolation clockwise and counter-clockwise, defined with an I, J, K centre offset or an R radius
C.stored coordinate systems that place part zero relative to machine home, so one program runs on different fixtures
D.three locators on the primary face, two on the secondary and one on the tertiary restrain nine of twelve directional degrees of freedom before clamping
Answer + AI explanation with Pro
14. Which term means: "G41 left or G42 right offset that lets the program follow the part profile while tool wear is corrected in the offset table"?
Mid
A.Cutter radius compensation
B.3-2-1 locating principle
C.Chatter
D.Work offsets G54–G59
Answer + AI explanation with Pro
15. Which statement is correct?
Mid
A.Cutter radius compensation — M03 spindle clockwise, M05 spindle stop, M06 tool change, M08 coolant on and M30 program end with rewind
B.Cutter radius compensation — plane-line-point sequence that establishes the part coordinate system on a probed component before any feature is measured
C.Cutter radius compensation — circular interpolation clockwise and counter-clockwise, defined with an I, J, K centre offset or an R radius
D.Cutter radius compensation — G41 left or G42 right offset that lets the program follow the part profile while tool wear is corrected in the offset table
Answer + AI explanation with Pro
16. What is Flank wear criterion?
Mid
A.circular interpolation clockwise and counter-clockwise, defined with an I, J, K centre offset or an R radius
B.rapid traverse to a position at maximum speed versus straight-line cutting at the programmed feed rate
C.average flank wear land of 0.3 mm taken as end of tool life under ISO 3685, after which finish and dimensions drift
D.G41 left or G42 right offset that lets the program follow the part profile while tool wear is corrected in the offset table
Answer + AI explanation with Pro
17. Which term means: "average flank wear land of 0.3 mm taken as end of tool life under ISO 3685, after which finish and dimensions drift"?
Mid
A.Flank wear criterion
B.CMM datum alignment
C.G02 and G03
D.G00 versus G01
Answer + AI explanation with Pro
18. Which statement is correct?
Mid
A.Flank wear criterion — stored coordinate systems that place part zero relative to machine home, so one program runs on different fixtures
B.Flank wear criterion — M03 spindle clockwise, M05 spindle stop, M06 tool change, M08 coolant on and M30 program end with rewind
C.Flank wear criterion — average flank wear land of 0.3 mm taken as end of tool life under ISO 3685, after which finish and dimensions drift
D.Flank wear criterion — plane-line-point sequence that establishes the part coordinate system on a probed component before any feature is measured
Answer + AI explanation with Pro
19. What is 3-2-1 locating principle?
Mid
A.stored coordinate systems that place part zero relative to machine home, so one program runs on different fixtures
B.three locators on the primary face, two on the secondary and one on the tertiary restrain nine of twelve directional degrees of freedom before clamping
C.G41 left or G42 right offset that lets the program follow the part profile while tool wear is corrected in the offset table
D.plane-line-point sequence that establishes the part coordinate system on a probed component before any feature is measured
Answer + AI explanation with Pro
20. Which term means: "three locators on the primary face, two on the secondary and one on the tertiary restrain nine of twelve directional degrees of freedom before clamping"?
Mid
A.Chatter
B.Flank wear criterion
C.3-2-1 locating principle
D.G00 versus G01
Answer + AI explanation with Pro
21. Which statement is correct?
Mid
A.3-2-1 locating principle — M03 spindle clockwise, M05 spindle stop, M06 tool change, M08 coolant on and M30 program end with rewind
B.3-2-1 locating principle — three locators on the primary face, two on the secondary and one on the tertiary restrain nine of twelve directional degrees of freedom before clamping
C.3-2-1 locating principle — G41 left or G42 right offset that lets the program follow the part profile while tool wear is corrected in the offset table
D.3-2-1 locating principle — circular interpolation clockwise and counter-clockwise, defined with an I, J, K centre offset or an R radius
Answer + AI explanation with Pro
22. What is CMM datum alignment?
Senior
A.average flank wear land of 0.3 mm taken as end of tool life under ISO 3685, after which finish and dimensions drift
B.plane-line-point sequence that establishes the part coordinate system on a probed component before any feature is measured
C.G41 left or G42 right offset that lets the program follow the part profile while tool wear is corrected in the offset table
D.self-excited vibration between tool and work that leaves a wavy surface, cured by changing spindle speed per the stability lobe diagram or reducing overhang
Answer + AI explanation with Pro
23. Which term means: "plane-line-point sequence that establishes the part coordinate system on a probed component before any feature is measured"?
Senior
A.Chatter
B.Common M-codes
C.CMM datum alignment
D.G00 versus G01
Answer + AI explanation with Pro
24. Which statement is correct?
Senior
A.CMM datum alignment — plane-line-point sequence that establishes the part coordinate system on a probed component before any feature is measured
B.CMM datum alignment — self-excited vibration between tool and work that leaves a wavy surface, cured by changing spindle speed per the stability lobe diagram or reducing overhang
C.CMM datum alignment — rapid traverse to a position at maximum speed versus straight-line cutting at the programmed feed rate
D.CMM datum alignment — three locators on the primary face, two on the secondary and one on the tertiary restrain nine of twelve directional degrees of freedom before clamping
Answer + AI explanation with Pro
25. What is Chatter?
Senior
A.self-excited vibration between tool and work that leaves a wavy surface, cured by changing spindle speed per the stability lobe diagram or reducing overhang
B.M03 spindle clockwise, M05 spindle stop, M06 tool change, M08 coolant on and M30 program end with rewind
C.plane-line-point sequence that establishes the part coordinate system on a probed component before any feature is measured
D.stored coordinate systems that place part zero relative to machine home, so one program runs on different fixtures
Answer + AI explanation with Pro
26. Which term means: "self-excited vibration between tool and work that leaves a wavy surface, cured by changing spindle speed per the stability lobe diagram or reducing overhang"?
Senior
A.Flank wear criterion
B.Work offsets G54–G59
C.CMM datum alignment
D.Chatter
Answer + AI explanation with Pro
27. Which statement is correct?
Senior
A.Chatter — plane-line-point sequence that establishes the part coordinate system on a probed component before any feature is measured
B.Chatter — rapid traverse to a position at maximum speed versus straight-line cutting at the programmed feed rate
C.Chatter — G41 left or G42 right offset that lets the program follow the part profile while tool wear is corrected in the offset table
D.Chatter — self-excited vibration between tool and work that leaves a wavy surface, cured by changing spindle speed per the stability lobe diagram or reducing overhang
Answer + AI explanation with Pro
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