Machine Tools Important Questions | Unit-wise R23 Exam Guide
Machine Tools play a major role in modern manufacturing. Understanding how lathes, milling machines, drilling machines, shaping machines, grinding machines, and CNC systems work helps students gain clarity in real-world production processes.
This blog presents Machine Tools important questions in a clean, student-friendly format to support exam preparation.
Machine Tools Important Questions for R23 JNTU Students (Unit-Wise)
Unit 1: Basics of Machining & Cutting Tools
Key Theory Questions
What are Machine Tools? Explain their importance in manufacturing.
Describe the basic elements of a Machine Tool.
What is a cutting tool? Classify single-point and multi-point tools.
Explain tool signature with a neat sketch.
Define rake angle, clearance angle, cutting edge, and tool nose radius.
What is machinability? What factors affect machinability?
Describe orthogonal and oblique cutting.
What is the Merchant’s circle diagram? Explain its significance.
Define chip formation and discuss different types of chips.
What is tool wear? Explain crater wear and flank wear.
What are cutting tool materials? Explain HSS, Carbides, and Ceramics.
Define cutting speed, feed, and depth of cut.
Explain the concept of heat generation in machining.
What is cutting fluid? State its functions and applications.
What are the forces involved in metal cutting?
Numerical Focus Question
Calculate cutting speed for a given tool diameter and RPM.
Determine machining time based on feed and length of cut.
Find shear angle using Merchant’s relation.
Calculate chip thickness ratio.
Evaluate tool life using Taylor’s tool life equation.
Unit 2: Lathe Machines
Key Theory Questions
Explain the working principle of a lathe machine.
Describe different types of lathes used in industries.
What are various lathe operations? Explain at least six.
What is taper turning? Describe different methods.
Explain thread cutting operation in detail.
What is a lathe carriage? Describe its components.
Explain the function of lead screw and feed rod.
What are work-holding devices used in a lathe?
What is the difference between three-jaw and four-jaw chuck?
Describe tool post types.
Explain the role of speed gearbox in a lathe.
What is knurling? Why is it performed?
Numerical Focus Question
Calculate RPM for given cutting speed and diameter.
Determine machining time for a turning operation.
Find feed rate required for specific surface finish.
Compute thread pitch based on gear ratio.
Calculate metal removal rate.
Unit 3: Milling, Drilling & Shaping Machines
Key Theory Questions
Explain the principle of milling machines.
Describe different types of milling cutters.
What is up-milling and down-milling?
Explain slotting, face milling, and end milling.
Describe the working of a drilling machine.
What are drill bit angles and their significance?
Explain counterboring, countersinking, and reaming.
Describe shaping and planing operations.
What are indexing methods in milling?
Explain quick-return mechanism in shaping machines.
What is climb milling?
What safety precautions should be taken while milling?
Numerical Focus Question
Calculate material removal rate in milling.
Determine feed per tooth for a milling cutter.
Compute spindle speed for drilling.
Find machining time in shaping operation.
Evaluate table feed rate.
Unit 4: Grinding & Superfinishing
Key Theory Questions
What is grinding? Explain its importance in Machine Tools.
Describe cylindrical, surface, and centerless grinding.
What are the properties of grinding wheels?
Explain glaze and loaded wheels.
What is dressing and truing?
Explain honing and lapping processes.
What is superfinishing? Why is it required?
Describe the construction of a grinding wheel.
What is abrasive machining?
Explain the significance of grit size and bond type.
What precautions are required in grinding?
Numerical Focus Question
Calculate grinding wheel speed.
Determine machining time for surface grinding.
Compute removal rate in cylindrical grinding.
Find feed rate.
Calculate depth of cut required.
Unit 5: CNC & Advanced Manufacturing
Key Theory Questions
What is CNC? Explain its advantages.
Describe basic CNC structure and components.
What is the difference between CNC and NC?
Explain G-codes and M-codes with examples.
Describe tool offsets and tool radius compensation.
What are drives and servomotors in CNC?
Explain interpolation techniques.
What is a machining center?
Explain automation levels used in Machine Tools.
What is DNC?
Describe work coordinate systems.
What is the significance of CAD/CAM in CNC?
Numerical Focus Question
Calculate program feed rate.
Determine cycle time for CNC operations.
Compute toolpath length.
Find spindle RPM from cutting parameters.
Solve interpolation distance.
Preparation Tips for Machine Tools
Study diagrams for all Machine Tools like lathe, milling, shaping, grinding.
Practice numerical problems daily to understand machining parameters.
Revise cutting tool angles and tool signature.
Understand CNC basics and G/M code interpretation.
Write short notes for operations like drilling, milling, grinding.
Go through previous year question papers.
Focus more on Units 1, 2, and 5 as they carry more weightage.
Conclusion
Machine Tools is a highly practical subject where understanding operations, tool geometry, cutting parameters, and CNC basics plays an important role. This blog gives unit-wise Machine Tools important questions along with numerical practice topics and simple preparation tips. Follow this structure to score high in exams and develop a strong manufacturing foundation.
