1000+ Manufacturing & Production Engineering MCQ for IBPS RRB [Solved]

1. In a plain milling cutter, the portion of the gash adjacent to the cutting edge on which the chip impinges is called
A. Face
B. Fillet
C. Land
D. Lead
Answer : A

2. In centre less grinders, the maximum angular adjustment of the regulating wheel is
A. 5°
B. 10°
C. 15°
D. 20°
Answer : B

3. For machining a mild steel workpiece by a high speed steel tool, the average cutting speed is
A. 5 m/min
B. 10 m/min
C. 15 m/min
D. 30 m/min
Answer : D

4. If the helix angle of the drill is made _________ 30°, then the torque required to drive the drill at a given feed will be more.
A. Equal to
B. Less than
C. More than
D. None of these
Answer : B

5. The angle between the lathe centres is
A. 30°
B. 45°
C. 60°
D. 90°
Answer : C

6. For generating a Coons surface we require
A. A set of grid points on the surface
B. A set of grid control points
C. Four bounding curves defining the surface
D. Two bounding curves and a set of grid control points
Answer : C

7. 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

8. 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

9. 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

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

11. Hardness of steel greatly improves with
A. Annealing
B. Cyaniding
C. Normalizing
D. Tempering
Answer : B

12. The cutting force in punching and blanking operations mainly depends on
A. The modulus of elasticity of metal
B. The shear strength of metal
C. The bulk modulus of metal
D. The yield strength of metal
Answer : B

13. When the tool moves parallel to the lathe axis, the movement is termed as
A. Cross feed
B. Angular feed
C. Longitudinal feed
D. Any one of these
Answer : C

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

15. Crater wear is mainly due to the phenomenon known as
A. Adhesion of metals
B. Oxidation of metals
C. Diffusion of metals
D. All of these
Answer : C

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. The guideways are of
A. Flat type
B. V-type
C. Dovetail type
D. Any one of these
Answer : D

18. In a metal arc welding process, a gas metal arc welding with magnetized flux is used and can be done in all the positions i.e. flat position, vertical position or inclined position.
A. Globular transfer
B. Spray transfer
C. GMAW practice
D. Dip transfer
Answer : C

19. In the relation VTⁿ = C, the value of n for carbide 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 : B

20. The cutting fluid mostly used for machining alloy steels is
A. Water
B. Soluble oil
C. Dry
D. Sulphurised mineral oil
Answer : D

21. In a shaper, the length of stroke is increased by
A. Increasing the centre distance of bull gear and crank pin
B. Decreasing the centre distance of bull gear and crank pin
C. Increasing the length of the arm
D. Decreasing the length of the slot in the slotted lever
Answer : A

22. 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

23. The hard grade grinding wheels are denoted by the letters
A. A to H
B. I to P
C. Q to Z
D. A to P
Anwer : C

24. 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

25. The maximum possible draft in cold rolling of sheet increases with the
A. Increase in coefficient of friction
B. Decrease in coefficient of friction
C. Decrease in roll radius
D. Decrease in roll velocity
Answer : A

26. 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

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

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

29. 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

30. 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

31. 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

32. 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

33. 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

34. The cutting force in up milling __________ per tooth movement of the cutter.
A. Is zero
B. Is maximum
C. Decreases from maximum to zero
D. Increases from zero to maximum
Answer : D

35. 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

36. 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

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. The cutting angle of a flat drill varies from
A. 3° to 8°
B. 20° to 30°
C. 60° to 90°
D. 90° to 120°
Answer : D

39. The height of each tooth of a broach is
A. Same throughout
B. In progressively decreasing order
C. In progressively increasing order
D. None of these
Answer : C

40. Gear burnishing is a process for
A. Surface finishing
B. Undercut gears
C. Cycloidal gears
D. Removing residual stresses from teeth roots
Answer : A

41. The factor responsible for the formation of discontinuous chips 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

42. The depth of cut in drilling is __________ the drill diameter.
A. Equal to
B. One-fourth
C. One-half
D. Double
Answer : C

43. 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

44. Larger end cutting edge angle _________ tool life.
A. Increases
B. Decreases
C. Does not effect
D. None of these
Answer : A

45. The type of tool used on milling machine and broaching machine is
A. Single point cutting tool
B. Two point cutting tool
C. Three point cutting tool
D. Multipoint cutting tool
Answer : D

46. In hot machining, the work is heated by
A. Simple heating
B. Flame heating
C. Induction heating
D. Any one of these
Answer : D

47. In drilling softer materials, the cutting speed is _________ as compared to harder materials.
A. Same
B. Low
C. High
D. None of these
Answer : C

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

49. 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

50. If the diameter of the hole is subject to considerable variation, then for locating in jigs and fixtures, the pressure type of locator used is
A. Conical locator
B. Cylindrical locator
C. Diamond pin locator
D. Vee locator
Answer : A