Tennessee Precision Machining
Certification Exam: Milling Operations
II Exam Questions And Correct Answers
(Verified Answers) Plus Rationales
2025/2026 Q&A | Instant Download
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1. What milling cutter is commonly used to cut keyways and
slots?
A. Face mill
B. Fly cutter
C. End mill
D. Reamer
Answer: C. End mill
End mills are designed for slotting, profiling, and cutting
keyways.
2. Which milling operation produces a flat surface
perpendicular to the cutter axis?
A. Plain milling
B. Slot milling
C. Straddle milling
D. Face milling
,Answer: D. Face milling
Face milling creates flat surfaces using the cutter face rather
than the cutter circumference.
3. What is the primary purpose of climb milling?
A. Increase tool wear
B. Reduce spindle speed
C. Improve surface finish and reduce cutting forces
D. Increase chip thickness at exit
Answer: C. Improve surface finish and reduce cutting forces
Climb milling generally provides better finishes and lower
cutting loads.
4. In conventional milling, chip thickness is:
A. Thick to thin
B. Constant
C. Thin to thick
D. Zero throughout
Answer: C. Thin to thick
Conventional milling starts with a thin chip and ends with a
thicker chip.
5. Which attachment allows machining of helical grooves?
A. Rotary table
B. Dividing head
,C. Boring head
D. Tapping attachment
Answer: B. Dividing head
Helical milling requires coordinated movement between the
table feed and dividing head.
6. What is the purpose of a dividing head?
A. Increase spindle speed
B. Hold cutting tools
C. Index workpieces accurately
D. Measure surface finish
Answer: C. Index workpieces accurately
Dividing heads allow precise angular positioning for gears,
splines, and polygons.
7. How many degrees are in one complete revolution?
A. 100°
B. 180°
C. 270°
D. 360°
Answer: D. 360°
One full rotation equals 360 degrees.
8. Which formula calculates spindle speed (RPM)?
, A. Feed × Diameter
B. RPM × Feed
C. (Cutting Speed × Constant) ÷ Cutter Diameter
D. Diameter × RPM
Answer: C. (Cutting Speed × Constant) ÷ Cutter Diameter
RPM depends on cutting speed and cutter diameter.
9. What is backlash in a milling machine?
A. Cutter vibration
B. Excessive spindle speed
C. Lost motion between screw and nut
D. Workpiece expansion
Answer: C. Lost motion between screw and nut
Backlash results from clearance between mating machine
components.
10. Which milling cutter is best for cutting gears?
A. Shell end mill
B. Fly cutter
C. Form-relieved gear cutter
D. Reamer
Answer: C. Form-relieved gear cutter
Gear cutters are specially shaped to generate gear tooth
profiles.
Certification Exam: Milling Operations
II Exam Questions And Correct Answers
(Verified Answers) Plus Rationales
2025/2026 Q&A | Instant Download
1. What milling cutter is commonly used to cut keyways and
slots?
A. Face mill
B. Fly cutter
C. End mill
D. Reamer
Answer: C. End mill
End mills are designed for slotting, profiling, and cutting
keyways.
2. Which milling operation produces a flat surface
perpendicular to the cutter axis?
A. Plain milling
B. Slot milling
C. Straddle milling
D. Face milling
,Answer: D. Face milling
Face milling creates flat surfaces using the cutter face rather
than the cutter circumference.
3. What is the primary purpose of climb milling?
A. Increase tool wear
B. Reduce spindle speed
C. Improve surface finish and reduce cutting forces
D. Increase chip thickness at exit
Answer: C. Improve surface finish and reduce cutting forces
Climb milling generally provides better finishes and lower
cutting loads.
4. In conventional milling, chip thickness is:
A. Thick to thin
B. Constant
C. Thin to thick
D. Zero throughout
Answer: C. Thin to thick
Conventional milling starts with a thin chip and ends with a
thicker chip.
5. Which attachment allows machining of helical grooves?
A. Rotary table
B. Dividing head
,C. Boring head
D. Tapping attachment
Answer: B. Dividing head
Helical milling requires coordinated movement between the
table feed and dividing head.
6. What is the purpose of a dividing head?
A. Increase spindle speed
B. Hold cutting tools
C. Index workpieces accurately
D. Measure surface finish
Answer: C. Index workpieces accurately
Dividing heads allow precise angular positioning for gears,
splines, and polygons.
7. How many degrees are in one complete revolution?
A. 100°
B. 180°
C. 270°
D. 360°
Answer: D. 360°
One full rotation equals 360 degrees.
8. Which formula calculates spindle speed (RPM)?
, A. Feed × Diameter
B. RPM × Feed
C. (Cutting Speed × Constant) ÷ Cutter Diameter
D. Diameter × RPM
Answer: C. (Cutting Speed × Constant) ÷ Cutter Diameter
RPM depends on cutting speed and cutter diameter.
9. What is backlash in a milling machine?
A. Cutter vibration
B. Excessive spindle speed
C. Lost motion between screw and nut
D. Workpiece expansion
Answer: C. Lost motion between screw and nut
Backlash results from clearance between mating machine
components.
10. Which milling cutter is best for cutting gears?
A. Shell end mill
B. Fly cutter
C. Form-relieved gear cutter
D. Reamer
Answer: C. Form-relieved gear cutter
Gear cutters are specially shaped to generate gear tooth
profiles.
