1000+ Manufacturing & Production Engineering MCQ for SBI PO [Solved]

1. 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

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. 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

4. Which of the following statement is correct about nose radius?
A. It improves tool life
B. It improves the surface finish
C. Both (A) and (B)
D. None of these
Answer : C

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

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

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

8. The factor considered for evaluation of machinability is
A. Cutting forces and power consumption
B. Tool life
C. Type of chips and shear angle
D. All of these
Answer : D

9. Which of the following operations can be performed with milling cutters?
A. Cutting key ways on shafts
B. Cutting external screw threads
C. Cutting teeth of spur gears
D. All of these
Answer : D

10. 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

11. Low helix angle drills are preferred for drilling holes in
A. Plastics
B. Copper
C. Cast steel
D. Carbon steel
Answer : A

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

13. In which of the following machine, the work remains stationary and the tool is rotated?
A. Vertical boring machine
B. Horizontal boring machine
C. Precision boring machine
D. Jig boring machine
Answer : B

14. 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

15. Chemical milling operation is performed
A. On universal milling machine
B. On plain milling machine
C. In a tank containing an etching solution
D. Any one of these
Answer : C

16. 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

17. The helix angle of a drill is __________ for drilling brass.
A. Equal to 30°
B. Less than 30°
C. More than 30°
D. None of these
Answer : B

18. 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

19. 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

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

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. 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

23. The hole to be drilled for tapping is _________ the outside diameter of the thread on the tap.
A. Equal to
B. Smaller than
C. Greater than
D. None of these
Answer : B

24. Misrun is a casting defect which occurs due to
A. Very high pouring temperature of the metal
B. Insufficient fluidity of the molten metal
C. Absorption of gases by the liquid metal
D. Improper alignment of the mould flasks
Answer : B

25. 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

26. The swing diameter over the bed is ________ the height of the centre measured from the bed of the lathe.
A. Equal to
B. Twice
C. Thrice
D. One-half
Answer : B

27. The lathe spindles are usually made hollow and provided with
A. Internal taper
B. External taper
C. Internal and external taper
D. No taper
Answer : A

28. In which of the following milling machine, the table can be tilted in a vertical plane by providing a swivel arrangement at the knee?
A. Universal milling machine
B. Plain milling machine
C. Universal milling machine
D. Hand milling machine
Answer : C

29. It is required to cut screw threads of 2 mm pitch on a lathe. The lead screw has a pitch of 6 mm. If the spindle speed is 60 r.p.m., then the speed of lead screw will be
A. 10 r.p.m.
B. 20 r.p.m.
C. 120 r.p.m.
D. 180 r.p.m.
Answer : B

30. 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

31. Which of the following parameters govern the value of shear angle in continuous chip formation?
A. True feed
B. Chip thickness
C. Rake angle of the cutting tool
D. All of these
Answer : D

32. The type of reamer used for reaming operation in a blind hole, is
A. Straight fluted reamer
B. Left hand spiral fluted reamer
C. Right hand spiral fluted reamer
D. Any one of these
Answer : C

33. A twist drill is a
A. Side cutting tool
B. Front cutting tool
C. End cutting tool
D. None of these
Answer : C

34. 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

35. 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

36. 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

37. 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

38. In oblique cutting of metals, the cutting edge of the tool is
A. Perpendicular to the workpiece
B. Perpendicular to the direction of tool travel
C. Parallel to the direction of tool travel
D. Inclined at an angle less than 90° to the direction of tool travel
Answer : D

39. 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

40. Discontinuous chips are formed during machining of
A. Brittle metals
B. Ductile metals
C. Hard metals
D. Soft metals
Answer : A

41. 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

42. 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

43. The usual value of the helix angle of a drill is
A. 20°
B. 30°
C. 45°
D. 60°
Answer : B

44. 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

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

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

47. Which of the following process is used for preparing parts having large curved surfaces and thin sections?
A. Hot machining
B. Ultrasonic machining
C. ECM process
D. Chemical milling
Answer : D

48. 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

49. A twist drill is specified by its
A. Shank, material and diameter
B. Shank, lip angle and size of flute
C. Material, length of body and helix angle
D. Any one of these
Answer : A

50. Trepanning is performed for
A. Finishing a drilled hole
B. Producing a large hole without drilling
C. Truing a hole for alignment
D. Enlarging a drilled hole
Answer : B