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

1. Tumbler gears in lathe are used to
A. Reduce the spindle speed
B. Cut gears
C. Give desired direction of movement to the lathe carriage
D. Drill a workpiece
Answer : C

2. Small nose radius
A. Increases tool life
B. Decreases tool life
C. Produces chipping and decreases tool life
D. Results in excessive stress concentration and greater heat generation
Answer : D

3. In lapping operation, the amount of metal removed is
A. 0.005 to 0.01 mm
B. 0.01 to 0.1 mm
C. 0.05 to 0.1 mm
D. 0.5 to 1 mm
Answer : A

4. A grinding wheel is said to be of _________ if it holds the abrasive grains more securely.
A. Soft grade
B. Medium grade
C. Hard grade
D. None of these
Answer : C

5. 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

6. 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

7. 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

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

9. Ceramic cutting tools are
A. Made by cold pressing of aluminium oxide powder
B. Available in the form of tips
C. Brittle and have low bending strength
D. All of these
Answer : D

10. The common welding error that occurs due to shrinkage of weld metal, faulty clamping of parts, faulty penetration or overheating at joints is called?
A. Distortion
B. Warping
C. Porous weld
D. Poor fusion
Answer : B

11. 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

12. Which one among the following welding processes uses nonconsumable electrode?
A. Gas metal arc welding
B. Submerged arc welding
C. Gas tungsten arc welding
D. Flux coated arc welding
Answer : C

13. Lapping is an operation of
A. Making a cone-shaped enlargement of the end of a hole
B. Smoothing and squaring the surface around a hole
C. Sizing and finishing a small diameter hole
D. Producing a hole by removing metal along the circumference of a hollow cutting tool
Answer : C

14. Chip breakers are used to
A. Increase tool life
B. Remove chips from bed
C. Break the chips into short segments
D. To minimise heat generation
Answer : C

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

16. The tool material, for faster machining, should have
A. Wear resistance
B. Red hardness
C. Toughness
D. All of these
Answer : D

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. Jigs are used
A. For holding and guiding the tool in drilling, reaming or tapping operations
B. For holding the work in milling, grinding, planing or turning operations
C. To check the accuracy of workpiece
D. None of the above
Answer : A

19. The operation in which oil is permeated into the pores of a powder metallurgy product is known as
A. Mixing
B. Sintering
C. Impregnation
D. Infiltration
Answer : C

20. For harder alloy steel, 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 : C

21. The grinding of long, slender shafts or bars is usually done by
A. In-feed grinding
B. Through feed grinding
C. End-feed grinding
D. Any one of these
Answer : B

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 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

24. 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

25. In order to achieve a specific surface finish in single point turning, the most important factor to be controlled is
A. Depth of cut
B. Cutting speed
C. Feed
D. Tool rake angle
Answer : B

26. The main purpose of spheroidising treatment is to improve
A. Hardenability of low carbon steels
B. Machinability of low carbon steels
C. Hardenability of high carbon steels
D. Machinability of high carbon steels
Answer : D

27. A tool used to withdraw a drill from the sleeve is called
A. Drill remover
B. Drill puller
C. Drift
D. Drill drawer
Answer : C

28. 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

29. The operation of producing grooves around the periphery of a cylindrical or conical workpiece is called
A. Profile milling
B. Gang milling
C. Saw milling
D. Helical milling
Answer : D

30. 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

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

32. The cutting speed for drilling copper 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 : B

33. When 3-2-1 principle is used to support and locate a three dimensional work-piece during machining, the number of degrees of freedom that are restricted is
A. 7
B. 8
C. 9
D. 10
Answer : C

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

35. The lip angle of a single point tool is usually
A. 20° to 40°
B. 40° to 60°
C. 60° to 80°
D. None of these
Answer : C

36. The high cutting speed and large rake angle of the tool will result in the formation of
A. Continuous chips
B. Discontinuous chip
C. Continuous chips with built up edge
D. None of these
Answer : A

37. Which of the following statement is wrong as regard to down milling?
A. It can not be used on old machines due to backlash between the feed screw of the table and the nut.
B. The chips are disposed off easily and do not interfere with the cutting.
C. The surface milled appears to be slightly wavy.
D. The coolant can be poured directly at the cutting zone where the cutting force is maximum.
Answer : C

38. 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

39. The cutting speed for counter-boring should be _________ that of drilling operation.
A. Equal to
B. Less than
C. Greater than
D. None of these
Answer : C

40. 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

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

42. 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

43. A drill mainly used in drilling brass, copper or softer materials, is
A. Flat drill
B. Straight fluted drill
C. Parallel shank twist drill
D. Tapered shank twist drill
Answer : B

44. In gear hobbing
A. Only hob rotates
B. Only gear blank rotates
C. Both hob and gear blank rotates
D. Neither hob nor gear blank rotates
Answer : C

45. 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

46. A grinding wheel is said to be of _________ if the abrasive grains can be easily dislodged.
A. Soft grade
B. Medium grade
C. Hard grade
D. None of these
Answer : A

47. A broach has
A. Roughing teeth
B. Semi-finishing teeth
C. Finishing teeth
D. All of these
Answer : D

48. 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

49. What is the name of the device used in arc welding circuits for the purpose of modifying the rate of current change when the weld road is varied rapidly?
A. Reactor
B. Kerf
C. Inductor
D. Cone
Answer : C

50. If the tearing efficiency of a riveted joint is 50%, then ratio of rivet hole diameter to the pitch of rivets is
A. 0.20
B. 0.30
C. 0.50
D. 0.60
Answer : C