Manufacturing & Production Engineering MCQ Solved Paper for SSC Stenographer

1. The average cutting speed for turning brass with a high speed steel tool is
A. 15 to 19 m/min
B. 25 to 31 m/min
C. 60 to 90 m/min
D. 90 to 120 m/min
Answer : C

2. 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

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

4. The grade of grinding wheel depends upon
A. Hardness of the material being ground
B. Speed of wheel and work
C. Condition of grinding machine
D. All of these
Answer : D

5. 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

6. In a CNC program block, N002 GO2 G91 X40 Z40......, GO2 and G91 refer to
A. Circular interpolation in counter clockwise direction and incremental dimension
B. Circular interpolation in counter clockwise direction and absolute dimension
C. Circular interpolation in clockwise direction and incremental dimension
D. Circular interpolation in clockwise direction and absolute dimension
Answer : C

7. 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

8. For fast removal of materials during grinding, a _________ grinding wheel is used.
A. Course grained
B. Fine grained
C. Medium grained
D. None of these
Answer : A

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

10. Match the items of List-I (Equipment) with the items of List-II (Process) and select the correct answer using the given codes.

List-I (Equipment)	List-II (Process)
P. Hot Chamber Machine	1. Cleaning
Q. Muller	2. Core making
R. Dielectric Baker	3. Die casting
S. Sand Blaster	4. Annealing
.	5. Sand mixing

A. P-2, Q-1, R-4, S-5
B. P-4, Q-2, R-3, S-5
C. P-4, Q-5, R-1, S-2
D. P-3, Q-5, R-2, S-1
Answer : D

11. In which type of welding a gas shield, a consumable electrode is used and the welding can be done in all positions.
A. ARC welding
B. Submerged ARC welding
C. TIG welding
D. MIG welding
Answer : D

12. 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

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

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

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

16. 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

17. A feed gear box for a screw cutting lathe is designed on the basis of
A. Geometric progression
B. Arithmetic progression
C. Harmonic progression
D. None of these
Answer : A

18. 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

19. The carbide tools operating at very low cutting speeds (below 30 m/min)
A. Reduces tool life
B. Increases tool life
C. Have no effect on tool life
D. Spoils the work piece
Answer : A

20. Any number of equal divisions can be obtained on milling machine by
A. Direct indexing
B. Simple indexing
C. Compound indexing
D. Differential indexing
Answer : B

21. The angle formed by the leading edge of the land with a plane having the axis of the drill, is called
A. Helix or rake angle
B. Point angle
C. Chisel edge angle
D. Lip clearance angle
Answer : A

22. 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

23. 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

24. In electro-discharge machining, dielectric is used to
A. Help in the movement of the sparks
B. Control the spark discharges
C. Act as coolant
D. All of these
Answer : D

25. 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

26. 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

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

28. Green sand mould indicates that
A. Polymeric mould has been cured
B. Mould has been totally dried
C. Mould is green in colour
D. Mould contains moisture
Answer : D

29. The chamfering 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 : A

30. 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

31. In orthogonal turning of a low carbon steel bar of diameter 150 mm with uncoated carbide tool, the cutting velocity is 90 m/min. The feed is 0.24 mm/rev and the depth of cut is 2mm. The chip thickness obtained is 0.48 mm. If the orthogonal rake angle is zero and the principle cutting edge angle is 90?, the shear angle in degree is
A. 20.56
B. 26.56
C. 30.56
D. 36.56
Answer : B

32. Twist drills are made of
A. High speed steel
B. Carbon steel
C. Stainless steel
D. Either (A) or (B)
Answer : D

33. 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

34. 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

35. A taper 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 : B

36. In _________ operation, the chip thickness is minimum at the beginning of the cut and it reaches to the maximum when the cut terminates.
A. Conventional milling
B. Climb milling
C. Face milling
D. End milling
Answer : A

37. The lead screw of a lathe has _________ threads.
A. Single start
B. Double start
C. Multi-start
D. Any one of these
Answer : A

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

39. The facing 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. Machining the ends of a workpiece to produce a flat surface square with the axis
Answer : D

40. 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

41. 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

42. 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

43. A type of welding flows, which is the result of a perfect proportion and mixture of acetylene and oxygen and is used for fusion welding of steel and cast iron, is
A. Carburizing flame
B. Oxidizing flame
C. Oxy-acetylene flame
D. Neutral flame
Answer : D

44. If a gas metal arc process uses a low arc voltage and the arc is continuously interrupted as the molten electrode metal fills up the arc gap is known as
A. ARC
B. Short ARC
C. ARC length
D. ARC blow
Answer : B

45. What is the type of welding defect caused due to shrinkage during solidification and by weld stresses called?
A. Incomplete fusion
B. Lamellar tearing
C. Mismatch
D. Shrinkage void
Answer : B

46. 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

47. The chamfering is an essential operation after
A. Knurling
B. Rough turning
C. Boring
D. Thread cutting
Answer : D

48. 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

49. The effect of setting a boring tool above centre height leads to
A. Increase in the effective rake angle and a decrease in the effective clearance angle
B. Increase in both effective rake angle and effective clearance angle
C. Decrease in the effective rake angle and an increase in the effective clearance angle
D. Decrease in both effective rake angle and effective clearance angle
Answer : A

50. 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