Discussion
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- Question
Which of the following statement is correct regarding grinding of high carbon steel?
Options- A. Grinding at high speed results in the reduction of chip thickness and cutting forces per grit.
- B. Aluminium oxide wheels are employed.
- C. The grinding wheel has to be of open structure.
- D. all of the above
- Correct Answer
- all of the above
- 1. In centreless grinding, the surface speed of regulating wheel is
Options- A. 5 to 15 m/min
- B. 15 to 60 m/min
- C. 60 to 90 m/min
- D. 90 to 120 m/min Discuss
- 2. The angle on which the strength of the tool depends is
Options- A. rake angle
- B. cutting angle
- C. clearance angle
- D. lip angle Discuss
- 3. The power per tonne of refrigeration is
Options- A. 3.5/C.O.P.
- B. C.O.P/3.5
- C. 3.5 x C.O.P.
- D. none of these Discuss
- 4. The pressure at the inlet of a refrigerant compressor is called
Options- A. suction pressure
- B. discharge pressure
- C. critical pressure
- D. back pressure Discuss
- 5. In aircraft, air refrigeration Cycle is used because of
Options- A. low weight per tonne of refrigeration
- B. high heat transfer rate
- C. low temperature at high altitudes
- D. higher coefficient of performance Discuss
- 6. In metal cutting, use of low feeds and high cutting speeds is desired when the objective is
Options- A. high metal removal rate
- B. dry machining
- C. use of soft cutting tool
- D. surface finish Discuss
- 7. While cutting helical gears on a non-differential gear hobber, the feed change gear ratio is
Options- A. independent of index change gear ratio
- B. dependent on speed change gear ratio
- C. inter-related to index change gear ratio
- D. independent of speed and index change gear ratio Discuss
- 8. The relation between tool life (T) and cutting speed (V) is VTn = Constant. In this relation, the value of n depends upon
Options- A. work material
- B. tool material
- C. working conditions
- D. type of chip produced Discuss
- 9. When the end of a tap is tapered for about three or four threads, it is known as a
Options- A. taper tap
- B. bottoming tap
- C. second tap
- D. none of these Discuss
- 10. The example of snag grinding is
Options- A. trimming the surface left by sprues and risers on castings
- B. grinding the parting line left on castings
- C. removing flash on forgings
- D. all of these Discuss
Production Engineering problems
Search Results
Correct Answer: 15 to 60 m/min
Correct Answer: rake angle
Correct Answer: 3.5/C.O.P.
Correct Answer: suction pressure
Correct Answer: low weight per tonne of refrigeration
Correct Answer: surface finish
Correct Answer: inter-related to index change gear ratio
Correct Answer: tool material
Correct Answer: second tap
Correct Answer: all of these
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