Manufacturing & Production Engineering 1000+ MCQ with answer for NEET PG

1. The hole to be drilled for tapping is _________ the outside diameter of the thread on the tap.
A. Equal to
B. Smaller than
C. Greater than
D. None of these
Answer : B

2. A jig is defined as a device which
A. Holds and locates a workpiece and guides and controls one or more cutting tools
B. Holds and locates a workpiece during an inspection or for a manufacturing operation
C. Is used to check the accuracy of workpiece
D. All of the above
Answer : A

3. Which of the following is the correct data structure for solid models?
A. Solid part - faces - edges - vertices
B. Solid part - edges - faces - vertices
C. Vertices - edges - faces - solid parts
D. Vertices - faces- edges - solid parts
Answer : C

4. The method of centre less grinding used to produce taper is
A. In-feed grinding
B. Through feed grinding
C. End feed grinding
D. Any one of these
Answer : C

5. The grooving is an operation of
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
Answer : C

6. The grinding wheel speed (surface speed in m/min) usually varies from
A. 500 to 1000
B. 1000 to 1500
C. 1500 to 2000
D. 2000 to 2500
Answer : C

7. The tap used to cut threads in a blind hole is
A. Taper tap
B. Second tap
C. Bottoming tap
D. Any one of these
Answer : C

8. The capacity of a material to be welded under the imposed fabrication conditions into a specific, suitably designed structure and to perform satisfactorily in the intended service is known as?
A. Weldment
B. Weld tab
C. Weldability
D. Tack weld
Answer : C

9. Gear lapping is an operation
A. After heat treatment
B. Prior to heat treatment
C. For gear reconditioning
D. None of these
Answer : A

10. Cold working of steel is defined as working
A. At its recrystallisation temperature
B. Above its recrystallisation temperature
C. Below its recrystallisation temperature
D. At two thirds of the melting temperature of the metal
Answer : C

11. Segmental chips are formed during machining
A. Mild steel
B. Cast iron
C. High speed steel
D. High carbon steel
Answer : B

12. The broaching operation in which the work moves past the stationary tool is called
A. Pull broaching
B. Push broaching
C. Surface broaching
D. Continuous broaching
Answer : D

13. 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

14. The cutting fluid mostly used for machining steel is
A. Water
B. Soluble oil
C. Dry
D. Heavy oils
Answer : B

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. 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

17. What is the type of joining process called, where the parts to be welded are kept in contact and rotated relative to each other and axial pressure is applied when the desired temperature is obtained?
A. Ultrasonic welding
B. Forge welding
C. Electron beam welding
D. Friction welding
Answer : D

18. A CNC vertical milling machine has to cut a straight slot of 10 mm width and 2mm depth by a cutter of 10 mm diameter between points (0,0) and (100,100) on the XY plane (dimensions in mm). The feed rate used for milling is 50 mm/min, milling time for the slot (in seconds) is
A. 120
B. 170
C. 180
D. 240
Answer : B

19. The lathe spindles are usually made hollow and provided with
A. Internal taper
B. External taper
C. Internal and external taper
D. No taper
Answer : A

20. Which of the following statement is incorrect with reference of lathe cutting tools?
A. The flank of the tool is the surface or surfaces below and adjacent to the cutting edges
B. The nose is the corner, arc or chamfer joining the side cutting and the end cutting edges
C. The heel is that part of the tool which is shaped to produce the cutting edges and face
D. The base is that surface of the shank which bears against the support and takes tangent pressure of the cut
Answer : C

21. In electrochemical machining, the gap between the tool and work is kept as
A. 0.1 mm
B. 0.4 mm
C. 0.35
D. 0.75 mm
Answer : D

22. The process of removing metal by a cutter which is rotated in the same direction of travel of workpiece, is called
A. Up milling
B. Down milling
C. Face milling
D. End milling
Answer : B

23. If the cutting speed is increased, then the built-up-edge
A. Becomes longer
B. May or may not form
C. Becomes smaller and finally does not form at all
D. Has nothing to do with speed
Answer : C

24. A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through hole in a mild steel plate 20 mm thickness. The depth of cut in this drilling operation is
A. 0.2 mm
B. 10 mm
C. 20 mm
D. 100 mm
Answer : C

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

26. 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

27. Discontinuous chips are formed during machining of
A. Brittle metals
B. Ductile metals
C. Hard metals
D. Soft metals
Answer : A

28. With the same tool life, the maximum material per minute is removed by
A. Increasing the cutting speed
B. Decreasing the cutting speed
C. Increasing the depth of cut
D. Increasing the feed rate
Answer : C

29. Two 1 mm thick steel sheets are to be spot welded at a current of 5000 A. Assuming effective resistance to be 200 ?m and current flow time of 0.2 second, heat generated during the process will be
A. 0.2 Joule
B. 1 Joule
C. 5 Joule
D. 1000 Joule
Answer : D

30. 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

31. 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

32. Flank 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
C. Cutting edge only
D. Front face only
Answer : A

33. A set of eight form relieved milling cutters for each module is provided to enable cutting of gears of different
A. Materials
B. Types of gears
C. Number of teeth
D. Width of gears
Answer : C

34. A ring gauge is used to measure
A. Outside diameter but not roundness
B. Roundness but not outside diameter
C. Both outside diameter and roundness
D. Only external threads
Answer : A

35. 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

36. The type of reamer used for reaming soft aluminium or copper, is
A. Straight fluted reamer
B. Left hand spiral fluted reamer
C. Right hand spiral fluted reamer
D. Any one of these
Answer : B

37. The method of grinding used to produce a straight or tapered surface on a workpiece, is
A. Internal cylindrical grinding
B. Form grinding
C. External cylindrical grinding
D. Surface grinding
Answer : C

38. A fixture is defined as a device which
A. Holds and locates a workpiece and guides and controls one or more cutting tools
B. Holds and locates a workpiece during an inspection or for a manufacturing operation
C. Is used to check the accuracy of workpiece
D. All of the above
Answer : B

39. 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

40. The actual feed in centerless grinders is given by (where d = Dia. of regulating wheel, n = Revolutions per minute, and ? = Angle of inclination of wheel)
A. ?d
B. ?dn
C. ?dn sin?
D. ?dn cos?
Answer : C

41. 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

42. In ultrasonic machining, the metal is removed by
A. Using abrasive slurry between the tool and work
B. Direct contact of tool with the work
C. Maintaining an electrolyte between the work and tool in a very small gap between the two
D. Erosion caused by rapidly recurring spark discharges between the tool and work
Answer : A

43. The broaching operation in which either the work or the tool moves across the other, is known as
A. Pull broaching
B. Push broaching
C. Surface broaching
D. Continuous broaching
Answer : C

44. The rear teeth of a broach
A. Perform burnishing operation
B. Remove minimum metal
C. Remove maximum metal
D. Remove no metal
Answer : C

45. Ultrasonic machining is best suited for
A. Tool steels
B. Sintered carbides
C. Glass
D. All of these
Answer : D

46. The tailstock set over required to turn a taper on the entire length of a workpiece having diameters D and d is
A. (D - d)/2L
B. (D - d)/L
C. (D - d)/2
D. D - d
Answer : C

47. Gears can be best produced on mass production by
A. Shaping
B. Casting
C. Forming
D. Hobbing
Answer : D

48. The object of caulking in a riveted joint is to make the joint
A. Free from corrosion
B. Stronger in tension
C. Free from stresses
D. Leak-proof
Answer : D

49. In an interchangeable assembly, shafts of size 25.000 -0.0100?????? mm mate with holes of size 25.000 -0.010????²? mm. The maximum possible clearance in the assembly will be
A. 10 microns
B. 20 microns
C. 30 microns
D. 60 microns
Answer : C

50. In which of the following machine, the work is usually rotated while the drill is fed into work?
A. Sensitive drilling machine
B. Radial drilling machine
C. Gang drilling machine
D. Deep hole drilling machine
Answer : D