1000+ Manufacturing & Production Engineering Multiple Choice Question Answer [Solved]

1. A dynamometer is a device used for the measurement of
A. Chip thickness ratio
B. Forces during metal cutting
C. Wear of the cutting tool
D. Deflection of the cutting tool
Answer : B

2. The angle between the face and flank of the single point cutting tool is known as
A. Rake angle
B. Clearance angle
C. Lip angle
D. Point angle
Answer : C

3. In up-cut milling the work piece is fed
A. Against the rotating cutter
B. At angle of 60° to the cutter
C. In the direction of the cutter
D. At the right angle to the cutter
Answer : A

4. Tool life is measured by the
A. Number of pieces machined between tool sharpenings
B. Time the tool is in contact with the job
C. Volume of material removed between tool sharpenings
D. All of the above
Answer : D

5. The addition of lead, sulphur and phosphorus to low carbon steels, help to
A. Reduce built up edge
B. Break up chips
C. Improve machinability
D. All of these
Answer : D

6. The correct sequence of tool materials in increasing order of their ability to retain their hot hardness is
A. Carbide, ceramic, cermet, borazon
B. Ceramic, carbide, borazon, cermet
C. Cermet, carbide, ceramic, borazon
D. Borazon, ceramic, carbide, cermet
Answer : C

7. The shear velocity is the velocity of
A. Tool relative to the workpiece
B. Chip relative to the tool
C. Tool along the tool face
D. None of these
Answer : D

8. When two main plates are kept in alignment butting each other and riveted with cover plate on both sides of the main plates with two rows of rivets in each main plate, the joint is known as _______ double cover butt joint.
A. Single riveted
B. Double riveted
C. Both (A) and (B)
D. None of these
Answer : B

9. Hardness of green sand mould increases with
A. Increase in moisture content beyond 6 percent
B. Increase in permeability
C. Decrease in permeability
D. Increase in both moisture content and permeability
Answer : C

10. In an orthogonal cutting, the depth of cut is halved and the feed rate is double. If the chip thickness ratio is unaffected with the changed cutting conditions, the actual chip thickness will be
A. Doubled
B. Halved
C. Quadrupled
D. Unchanged
Answer : A

11. In a planer
A. Tool is stationary and work reciprocates
B. Work is stationary and tool reciprocates
C. Tool moves over stationary work
D. Tool moves over reciprocating work
Answer : A

12. Internal gears can be made by
A. Hobbing
B. Shaping with pinion cutter
C. Shaping with rack cutter
D. Milling
Answer : B

13. The cutting speed for drilling aluminium, brass and bronze with high speed steel drills varies from
A. 10 to 20 m/min
B. 18 to 30 m/min
C. 24 to 45 m/min
D. 60 to 90 m/min
Answer : D

14. The drill spindles are provided with standard taper known as
A. Morse taper
B. Seller's taper
C. Chapman taper
D. Brown and Sharpe taper
Answer : A

15. Crater wear occurs mainly on the
A. Nose part, front relief face and side relief face of the cutting tool
B. Face of the cutting tool at a short distance from the cutting edge only
C. Cutting edge only
D. Front face only
Answer : B

16. Ceramic tools are fixed to tool body by
A. Soldering
B. Brazing
C. Welding
D. Clamping
Answer : B

17. In a centre lathe, the cutting tool is fed in _________ with reference to the lathe axis.
A. Cross direction only
B. Longitudinal direction only
C. Both cross and longitudinal direction
D. Any direction
Answer : C

18. Friction at the tool-chip interface can be reduced by
A. Decreasing the rake angle
B. Increasing the depth of cut
C. Decreasing the cutting speed
D. Increasing the cutting speed
Answer : D

19. Which of the following statement is correct for orthogonal cutting system?
A. The cutting edge of the tool is perpendicular to the direction of tool travel.
B. The cutting edge clears the width of the workpiece on either ends.
C. The chip flows over the tool face and the direction of the chip flow velocity is normal to the cutting edge.
D. All of the above
Answer : D

20. The in-feed grinding is used to
A. Produce tapers
B. Grind shoulders and formed surfaces
C. Grind long, slender shafts or bars
D. All of these
Answer : B

21. When the cutting edge of the tool is dull, then during machining
A. Continuous chips are formed
B. Discontinuous chips are formed
C. Continuous chips with built-up edge are formed
D. No chips are formed
Answer : C

22. The common welding error that occurs due to wrong speed, faulty preparation, and high / low current, improper electrode size is called?
A. Distortion
B. Warping
C. Porous weld
D. Poor fusion
Answer : D

23. What type of fusion welding process is used for welding sheet metals of all engineering metals (except Cu, Ag) in automobile and air craft industries, pipe and tubing production?
A. Thermit welding
B. Electroslag welding
C. Resistance welding
D. Submerged arc welding
Answer : C

24. In machining metal, cutting force at the cutting edge is measured by a
A. Wattmeter
B. Dynamometer
C. Hydrometer
D. Pyrometer
Answer : B

25. In order to grind soft material
A. Coarse grained grinding wheel is used
B. Fine grained grinding wheel is used
C. Medium grained grinding wheel is used
D. Any one of these
Answer : A

26. A hole is of dimension ? = 9 ?0????¹? mm. The corresponding shaft is of dimension ? = 9 ?0.001????¹? mm. The resulting assembly has
A. Loose running fit
B. Close running fit
C. Transition fit
D. Interference fit
Answer : C

27. The relief or clearance at the cutting edge of a flat drill varies from
A. 3° to 8°
B. 20° to 30°
C. 60° to 90°
D. 90° to 120°
Answer : A

28. The purpose of jigs and fixtures is to
A. Increase machining accuracy
B. Facilitate interchangeability
C. Decrease expenditure on quality control
D. All of these
Answer : D

29. In a single point turning operation with a cemented carbide and steel combination having a Taylor exponent of 0.25, if the cutting speed is halved, then tool life will become
A. Half
B. Two times
C. Eight times
D. Sixteen times
Answer : D

30. The saw milling is an operation of
A. Producing grooves around the periphery of a cylindrical or conical workpiece
B. Producing narrow slots or grooves on a workpiece
C. Reproduction of an outline of a template on a workpiece
D. Machining several surfaces of a workpiece simultaneously
Answer : B

31. The operation of smoothing and squaring the surface around a hole is known as
A. Counter-sinking
B. Counter-boring
C. Trepanning
D. Spot facing
Answer : D

32. The cutting speed for drilling __________ with high speed steel drills is 24 to 45 m/min.
A. Mild steel
B. Copper
C. Aluminium
D. Brass
Answer : A

33. Negative rakes are used for
A. Carbide tools
B. Heavy loads
C. Harder materials
D. All of these
Answer : D

34. A diamond locating pin is used in jigs and fixtures because
A. Diamond is very hard and wear resistant
B. It occupies very little space
C. It helps in assembly with tolerance on centre distance
D. It has a long life
Answer : C

35. For turning small taper on long workpiece, the suitable method is
A. By a form tool
B. By setting over the tail stock
C. By a taper turning attachment
D. By swivelling the compound rest
Answer : B

36. A process of removing metal by pushing or pulling a cutting tool is called
A. Up milling
B. Down milling
C. Forming
D. Broaching
Answer : D

37. The cutting tool in a milling machine is mounted on
A. Spindle
B. Arbor
C. Column
D. Knee
Answer : B

38. The usual value of the point angle of a drill is
A. 70°
B. 100°
C. 118°
D. 130°
Answer : C

39. In machining metals, surface roughness is due to
A. Feed marks or ridges left by the cutting tool
B. Fragment of built-up edge on the machined surface
C. Cutting tool vibrations
D. All of these
Answer : D

40. In _________ operation, the cutting force is maximum when the tooth begins its cut and reduces it to minimum when the tooth leaves the work.
A. Up milling
B. Down milling
C. Face milling
D. End milling
Answer : B

41. Slow speed of the spindle is necessary in
A. Thread cutting
B. Turning a work of larger diameter
C. Turning a hard or tough material
D. All of these
Answer : D

42. A solid cylinder of diameter 100 mm and height 50 mm is forged between two frictionless flat dies to a height of 25mm. The percentage change in diameter is
A. 0
B. 2.07
C. 20.7
D. 41.4
Answer : D

43. The taper on the lathe spindle is
A. 1 in 10
B. 1 in 15
C. 1 in 20
D. 1 in 30
Answer : C

44. Which of the following parameters influence the axial feed rate in centerless grinding?
A. Regulating wheel diameter
B. Speed of the regulating wheel
C. Angle between the axes of grinding and regulating wheels
D. All of the above
Answer : D

45. While cutting helical gears on a non-differential gear hobber, the feed change gear ratio is
A. Independent of index change gear ratio
B. Dependent on speed change gear ratio
C. Interrelated to index change gear ratio
D. Independent of speed and index change gear ratio
Answer : C

46. In plunge grinding
A. The work is reciprocated as the wheel feeds to produce cylinders longer than the width of wheel face
B. The work rotates in a fixed position as the wheel feeds to produce cylinders equal to or shorter than the width of wheel face
C. The work is reciprocated as the wheel feeds to produce cylinders shorter than the width of wheel face
D. The work rotates in a fixed position as the wheel feeds to produce cylinders longer than the width of wheel face
Answer : B

47. In hot machining, tool is made of
A. Tungsten carbide
B. Brass or copper
C. Diamond
D. Stainless steel
Answer : A

48. In metal machining, the zone where the maximum heat is generated due to the plastic deformation of metal, is called
A. Friction zone
B. Work-tool contact zone
C. Shear zone
D. None of these
Answer : C

49. Hot rolling of mild steel is carried out
A. At recrystallization temperature
B. Between 100?C to 150?C
C. Between recrystallization temperature
D. Above recrystallization temperature
Answer : D

50. Two streams of liquid metal which are not hot enough to fuse properly result into a casting defect known as
A. Cold shut
B. Swell
C. Sand wash
D. Scab
Answer : A