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- Question
The cutting speed for drilling aluminium, brass and bronze with high speed steel drills varies from
Options- A. 10 to 20 m/min
- B. 18 to 30 m/min
- C. 24 to 45 m/min
- D. 60 to 90 m/min
- Correct Answer
- 60 to 90 m/min
- 1. It is required to cut screw threads of 2 mm pitch on a lathe. The lead screw has a pitch of 6 mm. If the spindle speed is 60 r.p.m., then the speed of lead screw will be
Options- A. 10 r.p.m.
- B. 20 r.p.m.
- C. 120 r.p.m.
- D. 180 r.p.m. Discuss
- 2. If the cutting speed is increased, then the built-up-edge
Options- A. becomes longer
- B. may or may not form
- C. becomes smaller and finally does not form at all
- D. has nothing to do with speed Discuss
- 3. Cemented carbide tools are generally poor in shear.
Options- A. Yes
- B. No Discuss
- 4. The infeed grinding is similar to plunge grinding.
Options- A. Yes
- B. No Discuss
- 5. Which of the following statement is wrong as regard to down milling?
Options- A. It can not be used on old machines due to backlash between the feed screw of the table and the nut.
- B. The chips are disposed off easily and do not interfere with the cutting.
- C. The surface milled appears to be slightly wavy.
- D. The coolant can be poured directly at the cutting zone where the cutting force is maximum. Discuss
- 6. A tool used to withdraw a drill from the sleeve is called
Options- A. drill remover
- B. drill puller
- C. drift
- D. drill drawer Discuss
- 7. Fixtures are used
Options- A. for holding and guiding the tool in drilling, reaming or tapping operations
- B. for holding the work in milling, grinding, planing or turning operations
- C. to check the accuracy of workpiece
- D. none of the above Discuss
- 8. The lip angle is the angle
Options- A. between the tool face and the ground end surface of flank
- B. made by the face of the tool and the plane parallel to the base of the cutting tool
- C. between the face of the tool and a line tangent to the machined surface at the cutting point
- D. none of the above Discuss
- 9. Crater wear is mainly due to the phenomenon known as
Options- A. adhesion of metals
- B. oxidation of metals
- C. diffusion of metals
- D. all of these Discuss
- 10. Flank wear depends upon the
Options- A. hardness of the work and tool material at the operating temperature
- B. amount and distribution of hard constituents in the work material
- C. degree of strain hardening in the chip
- D. all of these Discuss
Production Engineering problems
Search Results
Correct Answer: 20 r.p.m.
Correct Answer: becomes smaller and finally does not form at all
Correct Answer: Yes
Correct Answer: Yes
Correct Answer: The surface milled appears to be slightly wavy.
Correct Answer: drift
Correct Answer: for holding the work in milling, grinding, planing or turning operations
Correct Answer: between the tool face and the ground end surface of flank
Correct Answer: diffusion of metals
Correct Answer: amount and distribution of hard constituents in the work material
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