Discussion
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- Question
In electro-discharge machining, dielectric is used to
Options- A. help in the movement of the sparks
- B. control the spark discharges
- C. act as coolant
- D. all of these
- Correct Answer
- all of these
- 1. The grooving is an operation of
Options- A. bevelling the extreme end of a workpiece
- B. embossing a diamond shaped pattern on the surface of a workpiece
- C. reducing the diameter of a workpiece over a very narrow surface
- D. enlarging the end of a hole cylindrically Discuss
- 2. The lathe spindles at the nose end have
Options- A. internal screw threads
- B. external screw threads
- C. no threads
- D. tapered threads Discuss
- 3. The negative rake is usually provided on
Options- A. high carbon steel tools
- B. high speed steel tools
- C. cemented carbide tools
- D. all of these Discuss
- 4. In metal cutting operations, chips are formed due to plastic deformation of the metal.
Options- A. Agree
- B. Disagree Discuss
- 5. The cutting angle of a flat drill varies from
Options- A. 3° to 8°
- B. 20° to 30°
- C. 60° to 90°
- D. 90° to 120° Discuss
- 6. The cutting speed is zero at the periphery and it is maximum at the centre of the drill.
Options- A. Yes
- B. No Discuss
- 7. The plain milling machine is more rigid and heavier in construction than a universal milling machine of the same size.
Options- A. Correct
- B. Incorrect Discuss
- 8. When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as
Options- A. electro-chemical machining
- B. electro-discharge machining
- C. ultra-sonic machining
- D. none of these Discuss
- 9. The obtuse angle, included between the chisel edge and the lip as viewed from the end of a drill, is called
Options- A. helix or rake angle
- B. point angle
- C. chisel edge angle
- D. lip clearance angle Discuss
- 10. The structure of a grinding wheel depends upon
Options- A. hardness of the material being ground
- B. nature of the grinding operation
- C. finish required
- D. all of these Discuss
Production Engineering problems
Search Results
Correct Answer: reducing the diameter of a workpiece over a very narrow surface
Correct Answer: external screw threads
Correct Answer: cemented carbide tools
Correct Answer: Agree
Correct Answer: 90° to 120°
Correct Answer: No
Correct Answer: Correct
Correct Answer: electro-discharge machining
Correct Answer: chisel edge angle
Correct Answer: all of these
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