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

1. A single point thread cutting tool should ideally hav
A. Zero rake angle
B. Positive rake angle
C. Negative rake angle
D. Point angle
Answer : A

2. Which of the following parameters govern the value of shear angle in continuous chip formation?
A. True feed
B. Chip thickness
C. Rake angle of the cutting tool
D. All of these
Answer : D

3. In a shaper
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 : B

4. The crystal structure of austenite is
A. Body centred cubic
B. Base centred cubic
C. Hexagonal closed packed
D. Body centred tetragonal
Answer : B

5. The specific cutting energy used for establishing the machinability of the metal depends upon its
A. Coefficient of friction
B. Microstructure
C. Work hardening characteristics
D. All of these
Answer : D

6. In centreless grinding, work place centre will be
A. Above the line joining the two wheel centres
B. Below the line joining the two wheel centres
C. On the line joining the two wheel centres
D. At the intersection of the line joining the wheel centres with the work place plane
Answer : A

7. As the cutting speed increases, the tool cutting forces
A. Remain constant
B. Increases
C. Decreases
D. First increases and then decreases
Answer : C

8. High speed steel drills can be operated at about _________ the speed of high carbon steel drills.
A. One-half
B. One-fourth
C. Double
D. Four times
Answer : C

9. Cutting fluids are used to
A. Cool the tool
B. Improve surface finish
C. Cool the workpiece
D. All of these
Answer : D

10. The abrasive recommended for grinding materials of low tensile strength is
A. Silicon carbide
B. Aluminium oxide
C. Sand stone
D. Diamond
Answer : A

11. As tool and work are not in contact in EDM process
A. No relative motion occurs between them
B. No wear of tool occurs
C. No power is consumed during metal cutting
D. No force between tool and work occurs
Answer : D

12. The chuck preferred for quick setting and accurate centering of a job is
A. Four jaw independent chuck
B. Collect chuck
C. Three jaw universal chuck
D. Magnetic chuck
Answer : B

13. 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

14. In which of the following machine, the work rotates and the tool is stationary?
A. Vertical boring machine
B. Horizontal boring machine
C. Precision boring machine
D. Jig boring machine
Answer : A

15. Which type of motor is not used in axis or spindle drives of CNC machine tools?
A. Induction motor
B. DC servo motor
C. Stepper motor
D. Linear servo motor
Answer : C

16. Down milling is also called
A. Conventional milling
B. Climb milling
C. End milling
D. Face milling
Answer : B

17. If the flame of the welding torch is directed towards the progress of welding, then what will you call the welding technique?
A. Forehand welding
B. Flux cored ARC welding
C. Electro slag welding
D. Pulsed spray welding
Answer : A

18. A fine grained grinding wheel is used to grind
A. Hard and brittle materials
B. Soft and ductile materials
C. Hard and ductile materials
D. Soft and brittle materials
Answer : A

19. The ratio between two consecutive spindle speeds for a six-speed drilling machine using drills of diameter 6.25 to 25 mm size and at a cutting velocity of 18 m/min is
A. 1.02
B. 1.32
C. 1.66
D. 1.82
Answer : B

20. The angle between the shear plane and __________ is called shear angle.
A. Work surface
B. Tool face
C. Machine surface
D. None of these
Answer : A

21. The rake angle required to machine brass by high speed steel tool is
A. 0°
B. 10°
C. 20°
D. 100°
Answer : A

22. The relation between the tool life (T) in minutes and cutting speed (V) in m/min is (where n = An exponent, which depends upon the tool and workpiece, and C = A constant)
A. VⁿT = C
B. VTⁿ = C
C. Vⁿ/T = C
D. V/Tⁿ = C
Answer : B

23. The increase in depth of cut and feed rate __________ surface finish.
A. Improves
B. Deteriorates
C. Does not effect
D. None of these
Answer : B

24. Which of the following statement is wrong about ultrasonic machining?
A. It is best suited for machining hard and brittle materials
B. It cuts materials at very slow speeds
C. It removes large amount of material
D. It produces good surface finish
Answer : C

25. Side rake angle of a single point cutting tool is the angle
A. By which the face of the tool is inclined towards back
B. By which the face of the tool is inclined sideways
C. Between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of the tool
D. Between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base
Answer : B

26. A push broach as compared to pull broach
A. Has less number of teeth
B. Is short and stocky
C. Removes less material for each pass of the tool
D. All of the above
Answer : D

27. The operation performed on a shaper is
A. Machining horizontal surface
B. Machining vertical surface
C. Machining angular surface
D. All of these
Answer : D

28. The chamfering is an essential operation after
A. Knurling
B. Rough turning
C. Boring
D. Thread cutting
Answer : D

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

30. A bottoming tap has
A. Its end tapered for about three or four threads
B. Its end tapered for about eight or ten threads
C. Full threads for the whole of its length
D. None of the above
Answer : C

31. For softer materials, the point angle of the drill is kept
A. Equal to 118°
B. Less than 118°
C. More than 118°
D. Any one of these
Answer : B

32. The factor responsible for the formation of continuous chips with built up edge is
A. Low cutting speed and large rake angle
B. Low cutting speed and small rake angle
C. High cutting speed and large rake angle
D. High cutting speed and small rake angle
Answer : B

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

34. In a plain milling cutter, the chip space between the back of one tooth and the face of the next tooth is called
A. Face
B. Fillet
C. Gash
D. Land
Answer : C

35. Any number of equal divisions can be obtained on milling machine by
A. Direct indexing
B. Simple indexing
C. Compound indexing
D. Differential indexing
Answer : B

36. In metal machining, the zone where the heat is generated due to friction between the moving chip and the tool face, is called
A. Friction zone
B. Work-tool contact zone
C. Shear zone
D. None of these
Answer : A

37. The surface finish is improved by the increase in
A. Cutting speed
B. Nose radius
C. True rake angle
D. All of these
Answer : D

38. In machining metals, chips break due to __________ of work material.
A. Toughness
B. Ductility
C. Elasticity
D. Work hardening
Answer : D

39. The tool life is said to be over if
A. Poor surface finish is obtained
B. There is sudden increase in cutting forces and power consumption
C. Overheating and fuming due to heat of friction starts
D. All of the above
Answer : D

40. The tool life is affected by
A. Depth of cut
B. Cutting speed
C. Feed
D. All of these
Answer : D

41. Hard and tough materials like cast iron should be turned at
A. Slow speed
B. High speed
C. Any speed
D. Certain specific speed
Answer : A

42. The abrasive slurry used in ultrasonic machining contains fine particles of
A. Aluminium oxide
B. Boron carbide
C. Silicon carbide
D. Any one of these
Answer : D

43. In American Standard Association (A S A) system, if the tool nomenclature is 8-6-5-5-10-15-2 mm, then the side rake angle will be
A. 5°
B. 6°
C. 8°
D. 10°
Answer : B

44. 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

45. Quality screw threads are produced by
A. Thread milling
B. Thread chasing
C. Thread cutting with single point tool
D. Thread casting
Answer : D

46. The soft grade grinding wheels are denoted by the letters
A. A to H
B. I to P
C. Q to Z
D. A to P
Answer : A

47. The hardness of a grinding wheel is specified by
A. Brinell hardness number
B. Rockwell hardness number
C. Vickers pyramid number
D. Letter of alphabet
Answer : D

48. The correct sequence of the following parameters in order of their maximum to minimum influence on tool life is
A. Feed rate, depth of cut, cutting speed
B. Depth of cut, cutting speed, feed rate
C. Cutting speed, feed rate, depth of cut
D. Feed rate, cutting speed, depth of cut
Answer : C

49. 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

50. The lathe centres are provided with standard taper known as
A. Morse taper
B. Seller's taper
C. Chapman taper
D. Brown and Sharpe taper
Answer : A