Production Engineering problems
- 1. Discontinuous chips are formed during machining of
Options- A. brittle metals
- B. ductile metals
- C. hard metals
- D. soft metals Discuss
Correct Answer: brittle metals
- 2. The lathe centres are provided with standard taper known as
Options- A. Morse taper
- B. Seller's taper
- C. Chapman taper
- D. Brown and Sharpe taper Discuss
Correct Answer: Morse taper
- 3. The operation of smoothing and squaring the surface around a hole is known as
Options- A. counter-sinking
- B. counter-boring
- C. trepanning
- D. spot facing Discuss
Correct Answer: spot facing
- 4. In metal cutting operations, the shear angle is the angle made by the shear plane with the
Options- A. direction of the tool axis
- B. direction of tool travel
- C. perpendicular to the direction of the tool axis
- D. central plane of the workpiece Discuss
Correct Answer: direction of tool travel
- 5. An operation of enlarging the end of a hole cylindrically is known as grooving.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Incorrect
- 6. 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
Correct Answer: The surface milled appears to be slightly wavy.
- 7. The infeed grinding is similar to plunge grinding.
Options- A. Yes
- B. No Discuss
Correct Answer: Yes
- 8. Cemented carbide tools are generally poor in shear.
Options- A. Yes
- B. No Discuss
Correct Answer: Yes
- 9. 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
Correct Answer: becomes smaller and finally does not form at all
- 10. 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
Correct Answer: 20 r.p.m.
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