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

1. In a single point tool, the angle between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base, is known as
A. Side relief angle
B. End relief angle
C. Back rake angle
D. Side rake angle
Answer : B

2. The type of tool used on lathe, shaper and planer is
A. Single point cutting tool
B. Two point cutting tool
C. Three point cutting tool
D. Multipoint cutting tool
Answer : A

3. 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

4. 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

5. A diamond locating pin is used in jigs and fixtures because
A. Diamond is very hard and wear resistant
B. It occupies very little space
C. It helps in assembly with tolerance on centre distance
D. It has a long life
Answer : C

6. 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

7. 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

8. The drill spindles are provided with standard taper known as
A. Morse taper
B. Seller's taper
C. Chapman taper
D. Brown and Sharpe taper
Answer : A

9. The lip angle is the angle
A. Between the tool face and the ground end surface of flank
B. Made by the face of the tool and the plane parallel to the base of the cutting tool
C. Between the face of the tool and a line tangent to the machined surface at the cutting point
D. None of the above
Answer : A

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

11. 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

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

13. 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

14. While cutting helical gears on a non-differential gear hobber, the feed change gear ratio is
A. Independent of index change gear ratio
B. Dependent on speed change gear ratio
C. Interrelated to index change gear ratio
D. Independent of speed and index change gear ratio
Answer : C

15. The maximum production of small and slender parts is done by
A. Watch maker's lathe
B. Sliding head stock automatic lathe
C. Multi-spindle automatic lathe
D. Capstan lathe
Answer : C

16. Quality screw threads are produced by
A. Thread milling
B. Thread chasing
C. Thread cutting with single point tool
D. Thread casting
Answer : D

17. 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

18. In a centre lathe, the cutting tool is fed in _________ with reference to the lathe axis.
A. Cross direction only
B. Longitudinal direction only
C. Both cross and longitudinal direction
D. Any direction
Answer : C

19. The primary purpose of a sprue in a casting mould is to
A. Feed the casting at a rate consistent with the rate of solidification.
B. Act as a reservoir for molten metal
C. Feed molten metal from the pouring basin to the gate
D. Help feed the casting until all solidification takes place
Answer : C

20. Which of the following statement is correct for orthogonal cutting system?
A. The cutting edge of the tool is perpendicular to the direction of tool travel.
B. The cutting edge clears the width of the workpiece on either ends.
C. The chip flows over the tool face and the direction of the chip flow velocity is normal to the cutting edge.
D. All of the above
Answer : D

21. With the same tool life, the maximum material per minute is removed by
A. Increasing the cutting speed
B. Decreasing the cutting speed
C. Increasing the depth of cut
D. Increasing the feed rate
Answer : C

22. The main purpose of a boring operation, as compared to drilling, is to
A. Drill a hole
B. Finish the drilled hole
C. Correct the hole
D. Enlarge the existing hole
Answer : D

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

24. 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

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

26. The percentage of carbon in gray cast iron is in the range of
A. 0.25 to 0.75 percent
B. 1.25 to 1.75 percent
C. 3 to 4 percent
D. 8 to 10 percent
Answer : C

27. 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

28. 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

29. The machining of titanium is difficult due to
A. High thermal conductivity of titanium
B. Chemical reaction between tool and work
C. Low tool-chip contact area
D. None of these
Answer : C

30. 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

31. The broaching operation in which the work moves past the stationary tool is called
A. Pull broaching
B. Push broaching
C. Surface broaching
D. Continuous broaching
Answer : D

32. The cutting fluid mostly used for machining steel is
A. Water
B. Soluble oil
C. Dry
D. Heavy oils
Answer : B

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

34. The cutting speed of a drill depends upon the
A. Material of drill
B. Type of material to be drilled
C. Quality of surface finish desired
D. All of these
Answer : D

35. 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

36. The tool life is affected by
A. Depth of cut
B. Cutting speed
C. Feed
D. All of these
Answer : D

37. A grinding wheel becomes glazed (i.e. cutting edge takes a glasslike appearance) due to
A. Wear of bond
B. Breaking of abrasive grains
C. Wear of abrasive grains
D. Cracks on grinding wheel
Answer : C

38. In centreless grinding, the surface speed of regulating wheel is
A. 5 to 15 m/min
B. 15 to 60 m/min
C. 60 to 90 m/min
D. 90 to 120 m/min
Answer : B

39. 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

40. 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

41. 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

42. Which of the following statement is correct about hot machining?
A. It requires less power than machining metals at room temperature.
B. The rate of tool wear is lower.
C. It is used for machining high strength and high temperature resistant materials.
D. All of the above
Answer : D

43. When the shear angle is small
A. Path of shear is short and chip is thin
B. Path of shear is large and chip is thick
C. Path of shear is short and chip is thick
D. Path of shear is large and chip is thin
Answer : B

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

45. 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

46. The top and sides of the table of a shaper usually have
A. L-type slots
B. T-type slots
C. I-type slots
D. Any one of these
Answer : B

47. In reaming process
A. Metal removal rate is high
B. High surface finish is obtained
C. High form accuracy is obtained
D. High dimensional accuracy is obtained
Answer : C

48. 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

49. 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

50. 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