A type of welding flows, which is the result of a perfect proportion and mixture of acetylene and oxygen and is used for fusion welding of steel and cast iron, is

A. Carburizing flame

B. Oxidizing flame

C. Oxy-acetylene flame

D. Neutral flame

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  1. The operation of smoothing and squaring the surface around a hole is known as
  2. In ECM, the material removal is due to
  3. In order to obtain a surface finish in the range of 0.75 μm to 1.25 μm , the operation used…
  4. If the tearing efficiency of a riveted joint is 50%, then ratio of rivet hole diameter to the pitch…
  5. A solid cylinder of diameter 100 mm and height 50 mm is forged between two frictionless flat dies to…
  6. As tool and work are not in contact in EDM process
  7. Fixtures are used
  8. Dielectric is used in
  9. What is the welding defect caused due to improper control and poor removal of slog between passes called?
  10. During the execution of a CNC part program block NO20 GO2 X45.0 Y25.0 R5.0 ; the type of tool motion…
  11. For softer materials, the point angle of the drill is kept
  12. In order to achieve a specific surface finish in single point turning, the most important factor to…
  13. The shear velocity is the velocity of
  14. For machining a cast iron workpiece by a high speed steel tool, the average cutting speed is
  15. The drill spindles are provided with standard taper known as
  16. The rake angle of a single point cutting tool corresponds to _________ of a twist drill.
  17. Internal gear cutting operation can be performed by
  18. In up milling, the thickness of chip is
  19. The crystal structure of austenite is
  20. The material property which depends only on the basic crystal structure is
  21. In metal cutting, use of low feeds and high cutting speeds is desired when the objective is
  22. An expendable pattern is used in
  23. The rake angle required to machine brass by high speed steel tool is
  24. The vector sum of cutting velocity and chip velocity is __________ shear velocity.
  25. In oblique cutting of metals, the cutting edge of the tool is
  26. The process of removing metal by a cutter which is rotated against the direction of travel of workpiece,…
  27. Glazing in grinding wheels takes place when the
  28. High speed steel drills can be operated at about _________ the speed of high carbon steel drills.
  29. The lip angle of a single point tool is usually
  30. For turning internal tapers, the suitable method is