1000+ Manufacturing & Production Engineering Multiple Choice Question Answer [Solved]

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. The lip clearance angle is the angle formed by the
A. Leading edge of the land with a plane having the axis of the drill
B. Flank and a plane at right angles to the drill axis
C. Chisel edge and the lip as viewed from the end of a drill
D. None of the above
Answer : B

3. 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

4. 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

5. Hard and tough materials like cast iron should be turned at
A. Slow speed
B. High speed
C. Any speed
D. Certain specific speed
Answer : A

6. Carbide tipped tools usually have
A. Negative rake angle
B. Positive rake angle
C. Any rake angle
D. No rake angle
Answer : A

7. 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

8. 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

9. 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

10. A fine grained grinding wheel is used to grind
A. Hard and brittle materials
B. Soft and ductile materials
C. Hard and ductile materials
D. Soft and brittle materials
Answer : A

11. 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

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

13. Glazing in grinding wheels takes place when the
A. Wheel is too hard or wheel revolves at a very high speed
B. Wheel is too soft or wheel revolves at a very slow speed
C. Wheel is too hard and wheel revolves at very slow speed
D. Wheel is too soft and wheel revolves at a very high speed
Answer : A

14. In a planer
A. Tool is stationary and work reciprocates
B. Work is stationary and tool reciprocates
C. Tool moves over stationary work
D. Tool moves over reciprocating work
Answer : A

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

16. 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

17. 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

18. 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

19. In down milling, the thickness of chip is
A. Minimum at the beginning of the cut and maximum at the end of the cut
B. Maximum at the beginning of the cut and minimum at the end of the cut
C. Uniform throughout the cut
D. None of these
Answer : B

20. 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

21. High speed steel drills can be operated at about _________ the speed of high carbon steel drills.
A. One-half
B. One-fourth
C. Double
D. Four times
Answer : C

22. 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

23. In electrochemical machining, the gap between the tool and work is kept as
A. 0.1 mm
B. 0.4 mm
C. 0.35
D. 0.75 mm
Answer : D

24. In centreless grinders, the regulating wheel is inclined at
A. 0° to 8°
B. 9° to 15°
C. 16° to 20°
D. 21° to 25°
Answer : A

25. The lathe spindles at the nose end have
A. Internal screw threads
B. External screw threads
C. No threads
D. Tapered threads
Answer : B

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

27. 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

28. The usual value of the point angle of a drill is
A. 70°
B. 100°
C. 118°
D. 130°
Answer : C

29. The vector sum of cutting velocity and chip velocity is __________ shear velocity.
A. Equal to
B. Less than
C. More than
D. None of these
Answer : A

30. During the execution of a CNC part program block NO20 GO2 X45.0 Y25.0 R5.0 ; the type of tool motion will be
A. Circular Interpolation ? clockwise
B. Circular Interpolation ? counter clockwise
C. Linear Interpolation
D. Rapid feed
Answer : A

31. 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

32. 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

33. 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

34. For turning small taper on long workpiece, the suitable method is
A. By a form tool
B. By setting over the tail stock
C. By a taper turning attachment
D. By swivelling the compound rest
Answer : B

35. 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

36. The grinding operation is a
A. Shaping operation
B. Forming operation
C. Surface finishing operation
D. Dressing operation
Answer : C

37. A lead-screw with half nuts in a lathe, free to rotate in both directions has
A. V-threads
B. Whitworth threads
C. Buttress threads
D. Acme threads
Answer : D

38. The cutting speed for drilling aluminium, brass and bronze with carbon steel drills is _________ cutting speed for drilling mild steel with high speed steel drills.
A. Equal to
B. Less than
C. More than
D. None of these
Answer : A

39. The aluminium oxide abrasive is chiefly used for grinding
A. High speed steel
B. Carbon steel
C. Wrought iron
D. All of these
Answer : D

40. The object of caulking in a riveted joint is to make the joint
A. Free from corrosion
B. Stronger in tension
C. Free from stresses
D. Leak-proof
Answer : D

41. 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

42. In a shaper
A. Tool is stationary and work reciprocates
B. Work is stationary and tool reciprocates
C. Tool moves over stationary work
D. Tool moves over reciprocating work
Answer : B

43. The tool life in case of a grinding wheel is the time
A. Between two successive regrinds of the wheel
B. Taken for the wheel to be balanced
C. Taken between two successive wheel dressings
D. Taken for a wear of 1 mm on its diameter
Answer : C

44. In a particular type of welding, flux is prepared in the form of a coarse powder and granulated flux is spread over the joint. What is this type of welding process called?
A. Electric arc welding
B. Submerged arc welding
C. MIG welding
D. TIG welding
Answer : B

45. 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

46. 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

47. Allowance in limits and fits refers to
A. Maximum clearance between shaft and hole
B. Minimum clearance between shaft and hole
C. Difference between maximum and minimum sizes of hole
D. Difference between maximum and minimum sizes of shaft
Answer : A

48. In machining metals, chips break due to __________ of work material.
A. Toughness
B. Ductility
C. Elasticity
D. Work hardening
Answer : D

49. 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

50. 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