XAT - Manufacturing & Production Engineering 1000+ MCQ [Solved] PDF Download

1. In drilling aluminium, a drill with
A. Zero helix angle is used
B. Low helix angle is used
C. High helix angle is used
D. Any helix angle can be used
Answer : C

2. High speed steel tools retain their hardness upto a temperature of
A. 250°C
B. 350°C
C. 500°C
D. 900°C
Answer : D

3. A lead-screw with half nuts in a lathe, free to rotate in both directions has
A. V-threads
B. Whitworth threads
C. Buttress threads
D. Acme threads
Answer : D

4. The enlarging of an existing circular hole with a rotating single point tool is called
A. Boring
B. Drilling
C. Reaming
D. Internal turning
Answer : A

5. NC contouring is an example of
A. Continuous path positioning
B. Point-to-point positioning
C. Absolute positioning
D. Incremental positioning
Answer : A

6. In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate
A. Increases continuously
B. Decreases continuously
C. Decreases, becomes stable and then increases.
D. Increases, becomes stable and then decreases.
Answer : D

7. 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

8. 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

9. 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

10. 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

11. 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

12. When the end of a tap is tapered for about three or four threads, it is known as a
A. Taper tap
B. Bottoming tap
C. Second tap
D. None of these
Answer : C

13. 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

14. The percentage of carbon in gray cast iron is in the range of
A. 0.25 to 0.75 percent
B. 1.25 to 1.75 percent
C. 3 to 4 percent
D. 8 to 10 percent
Answer : C

15. 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

16. In a shaper, the metal is removed during
A. Forward stroke
B. Return stroke
C. Both the forward and return strokes
D. Neither the forward nor the return stroke
Answer : A

17. 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

18. 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

19. The size of a lathe is specified by the
A. Length between centres
B. Swing diameter over the bed
C. Swing diameter over the carriage
D. All of these
Answer : D

20. In order to prevent tool from rubbing the work _________ on tools are provided.
A. Rake angles
B. Relief angles
C. Face angles
D. None of these
Answer : B

21. 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

22. 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

23. 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

24. 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

25. The negative rake is usually provided on
A. High carbon steel tools
B. High speed steel tools
C. Cemented carbide tools
D. All of these
Answer : C

26. 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

27. 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

28. The lip angle is the angle
A. Between the tool face and the ground end surface of flank
B. Made by the face of the tool and the plane parallel to the base of the cutting tool
C. Between the face of the tool and a line tangent to the machined surface at the cutting point
D. None of the above
Answer : A

29. The material property which depends only on the basic crystal structure is
A. Fatigue strength
B. Work hardening
C. Fracture strength
D. Elastic constant
Answer : C

30. In drilling operation, the metal is removed by
A. Shearing
B. Extrusion
C. Shearing and extrusion
D. Shearing and compression
Answer : C

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

32. In the relation VTⁿ = C, the value of n for ceramic tools is
A. 0.1 to 0.2
B. 0.20 to 0.25
C. 0.25 to 0.40
D. 0.40 to 0.55
Answer : D

33. A drill considered as a cutting tool having zero rake, is known as a
A. Flat drill
B. Straight fluted drill
C. Parallel shank twist drill
D. Tapered shank twist drill
Answer : B

34. 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

35. The silicon carbide abrasive is chiefly used for grinding
A. Cemented carbide
B. Ceramic
C. Cast iron
D. All of these
Answer : D

36. The stroke of a shaping machine is 250 mm. It makes 30 double strokes per minute. The overall average speed of operation is
A. 3.75 m/min
B. 5 m/min
C. 7.5 m/min
D. 15 m/min
Answer : C

37. Which of the following statement is correct about EDM machining?
A. It can machine hardest materials.
B. It produces high degree of surface finish.
C. The tool and work are never in contact with each other.
D. All of these
Answer : D

38. The main purpose of a boring operation, as compared to drilling, is to
A. Drill a hole
B. Finish the drilled hole
C. Correct the hole
D. Enlarge the existing hole
Answer : D

39. An operation of embossing a diamond shaped pattern on the surface of a workpiece, is known as
A. Counter-boring
B. Grooving
C. Knurling
D. Facing
Answer : C

40. The cutting speed of a drill depends upon the
A. Material of drill
B. Type of material to be drilled
C. Quality of surface finish desired
D. All of these
Answer : D

41. In an interchangeable assembly, shafts of size 25.000 -0.010?????? mm mate with holes of size 25.000 -0.020????³?, the maximum interference (in microns) in the assembly is
A. 40
B. 30
C. 20
D. 10
Answer : C

42. EDM machining is applied for
A. Shaping carbide dies and punches having complicated profiles
B. Making large number of small holes in sieves and fuel nozzles
C. Embossing and engraving on harder materials
D. All of these
Answer : D

43. In electro discharge machining, tool is made of
A. Brass
B. Copper
C. Copper tungsten alloy
D. All of these
Answer : D

44. Glazing in grinding wheels takes place when the
A. Wheel is too hard or wheel revolves at a very high speed
B. Wheel is too soft or wheel revolves at a very slow speed
C. Wheel is too hard and wheel revolves at very slow speed
D. Wheel is too soft and wheel revolves at a very high speed
Answer : A

45. Gear finishing operation is called
A. Shaping
B. Milling
C. Hobbing
D. Burnishing
Answer : D

46. What is the type of welding defect is caused due to stresses on heating and cooling called?
A. Incomplete penetration
B. Shrinkage void
C. Slag Entrapment (Inclusions)
D. Incomplete fusion
Answer : B

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

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

49. 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

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