Manufacturing & Production Engineering MCQ Solved Paper for UPSC CSE

1. Fixtures 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 : B

2. 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

3. 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

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

5. 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

6. 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

7. Glazing in grinding wheels can be decreased by
A. Using a harder wheel or by increasing the wheel speed
B. Using a softer wheel or by decreasing the wheel speed
C. Using a harder wheel or by decreasing the wheel speed
D. Using a softer wheel or by increasing the wheel speed
Answer : B

8. 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

9. 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

10. What is the type of welding defect caused due to poor manipulation of weld rod or a dirty joint called?
A. Porosity
B. Undercut
C. Under fill
D. Crack
Answer : B

11. 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

12. 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

13. In order to have interference fit, it is essential that the lower limit of the shaft should be
A. Greater than the upper limit of the hole
B. Lesser than the upper limit of the hole
C. Greater than the lower limit of the hole
D. Lesser than the lower limit of the hole
Answer : A

14. The process of changing the shape of grinding wheel as it becomes worn due to breaking away of the abrasive and bond, is called
A. Truing
B. Dressing
C. Facing
D. Clearing
Answer : A

15. The chuck used for setting up of heavy and irregular shaped work should be
A. Four jaw independent chuck
B. Three jaw universal chuck
C. Magnetic chuck
D. Drill chuck
Answer : A

16. The parameter which completely defines the chip formation in a metal cutting process is
A. Shear angle
B. Chip-tool contact length
C. Both (A) and (B)
D. None of these
Answer : C

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

18. When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as
A. Electrochemical machining
B. Electro-discharge machining
C. Ultrasonic machining
D. None of these
Answer : B

19. While current is shut down in the welding circuit, what kind of voltage exists between the output terminals of the welding machine?
A. GTAW
B. Open air cut voltage
C. Kerf
D. Gouging
Answer : B

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

21. During normalizing process of steel, the specimen is heated
A. Between the upper and lower critical temperature and cooled in still air.
B. Above the upper critical temperature and cooled in furnace.
C. Above the upper critical temperature and cooled in still air.
D. Between the upper and lower critical temperature and cooled in furnace.
Answer : C

22. 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

23. 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

24. In order to grind soft material
A. Coarse grained grinding wheel is used
B. Fine grained grinding wheel is used
C. Medium grained grinding wheel is used
D. Any one of these
Answer : A

25. 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

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

27. Tool signature consists of __________ elements.
A. Two
B. Four
C. Five
D. Seven
Answer : D

28. What is the welding defect caused due to improper control and poor removal of slog between passes called?
A. Mismatch
B. Under fill
C. Crack
D. Porosity
Answer : B

29. 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

30. 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

31. Threading is an operation of
A. Smoothing and squaring the surface around a hole
B. Sizing and finishing a small diameter hole
C. Producing a hole by removing metal along the circumference of a hollow cutting tool
D. Cutting helical grooves on the external cylindrical surface
Answer : D

32. 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

33. Which of the following operation is first performed?
A. Spot facing
B. Boring
C. Tapping
D. Drilling
Answer : B

34. 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

35. The process of improving the cutting action of the grinding wheel is called
A. Truing
B. Dressing
C. Facing
D. Clearing
Answer : B

36. 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

37. 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

38. Thread grinding requires work speed from
A. 1 to 3 m/min
B. 5 to 10 m/min
C. 10 to 14 m/min
D. 14 to 20 m/min
Answer : A

39. 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

40. The operation of smoothing and squaring the surface around a hole is known as
A. Counter-sinking
B. Counter-boring
C. Trepanning
D. Spot facing
Answer : D

41. A shaft has a dimension, ?9 +0.025??????, the respective values of fundamental deviation and tolerance are
A. - 0.025, ±0.008
B. - 0.025, 0.016
C. - 0.009, ± 0.008
D. - 0.009, 0.016
Answer : D

42. Which of the following statement is wrong?
A. The diamond is the hardest tool material and can run at cutting speeds about 50 times that of high speed steel tool.
B. The ceramic tools can be used at cutting speeds 40 times that of high speed steel tools.
C. The cemented carbide tools can be used at cutting speeds 10 times that of high speed steel tools.
D. The ceramic tools can withstand temperature upto 600°C only.
Answer : D

43. Trepanning 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 : D

44. 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

45. Glazing in grinding wheels __________ cutting capacity.
A. Has no effect on
B. Increase
C. Decrease
D. None of these
Answer : C

46. Which of the following statement is correct regarding grinding of high carbon steel?
A. Grinding at high speed results in the reduction of chip thickness and cutting forces per grit.
B. Aluminium oxide wheels are employed.
C. The grinding wheel has to be of open structure.
D. All of the above
Answer : D

47. The tool may fail due to
A. Cracking at the cutting edge due to thermal stresses
B. Chipping of the cutting edge
C. Plastic deformation of the cutting edge
D. All of these
Answer : D

48. 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

49. Which among the NC operations given below are continuous path operations? Arc Welding (AW), Drilling (D), Laser Cutting of Sheet Metal (LC), Milling (M), Punching in Sheet Metal (P), Spot Welding (SW)
A. AW, LC and M
B. AW, D, LC and M
C. D, LC, P and SW
D. D, LC, and SW
Answer : A

50. 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