Manufacturing & Production Engineering MCQ Solved Paper for GMAT

1. In drilling aluminium, a drill with
A. Zero helix angle is used
B. Low helix angle is used
C. High helix angle is used
D. Any helix angle can be used
Answer : C

2. Which of the following engineering materials is the most suitable candidate for hot chamber die casting?
A. Low carbon steel
B. Titanium
C. Copper
D. Tin
Answer : D

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

4. The thrust force will increase with the increase in
A. Side cutting edge angle
B. Tool nose radius
C. Rake angle
D. End cutting edge angle
Answer : A

5. 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

6. The factor responsible for the formation of discontinuous chips is
A. Low cutting speed and large rake angle
B. Low cutting speed and small rake angle
C. High cutting speed and large rake angle
D. High cutting speed and small rake angle
Answer : B

7. 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

8. 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

9. 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

10. Relief angles on high speed steel tools usually vary from
A. 0° to 3°
B. 3° to 10°
C. 10° to 20°
D. 20° to 30°
Answer : D

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

12. If the helix angle of the drill is made _________ 30°, then the torque required to drive the drill at a given feed will be more.
A. Equal to
B. Less than
C. More than
D. None of these
Answer : B

13. Jigs 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 : A

14. 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

15. The strength of a brazed joint
A. Decreases with increase in gap between the two joining surfaces
B. Increases with increase in gap between the two joining surfaces
C. Decreases up to certain gap between the two joining surfaces beyond which it increases
D. Increases up to certain gap between the two joining surfaces beyond which it decreases
Answer : D

16. For generating a Coons surface we require
A. A set of grid points on the surface
B. A set of grid control points
C. Four bounding curves defining the surface
D. Two bounding curves and a set of grid control points
Answer : C

17. 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

18. Soft materials can not be economically ground due to
A. High temperature involved
B. Frequent wheel clogging
C. Rapid wheel wear
D. Low work piece stiffness
Answer : B

19. NC contouring is an example of
A. Continuous path positioning
B. Point-to-point positioning
C. Absolute positioning
D. Incremental positioning
Answer : A

20. 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

21. In electro discharge machining, tool is made of
A. Brass
B. Copper
C. Copper tungsten alloy
D. All of these
Answer : D

22. In order to prevent tool from rubbing the work _________ on tools are provided.
A. Rake angles
B. Relief angles
C. Face angles
strong>D. None of these
Answer : B

23. The angle between the lathe centres is
A. 30°
B. 45°
C. 60°
D. 90°
Answer : C

24. If the flame of the welding torch is directed towards the progress of welding, then what will you call the welding technique?
A. Forehand welding
B. Flux cored ARC welding
C. Electro slag welding
D. Pulsed spray welding
Answer : A

25. The cutting speed is minimum while machining _________ with a high speed steel tool.
A. Cast iron
B. Mild steel
C. Brass
D. Aluminium
Answer : A

26. Climb milling is chosen while machining because
A. The chip thickness increase gradually
B. It enables the cutter to dig in and start the cut
C. The specific power consumption is reduced
D. Better surface finish can be obtained
Answer : B

27. 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

28. The in-feed grinding is used to
A. Produce tapers
B. Grind shoulders and formed surfaces
C. Grind long, slender shafts or bars
D. All of these
Answer : B

29. 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

30. Two plates of the same metal having equal thickness are to be butt welded with electric arc. When the plate thickness changes, welding is achieved by
A. Adjusting the current
B. Adjusting the duration of current
C. Changing the electrode size
D. Changing the electrode coating
Answer : C

31. Dielectric is used in
A. Electrochemical machining
B. Ultrasonic machining
C. Electro discharge machining
D. Laser machining
Answer : C

32. 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

33. In the relation VTⁿ = C, the value of n for ceramic tools is
A. 0.1 to 0.2
B. 0.20 to 0.25
C. 0.25 to 0.40
D. 0.40 to 0.55
Answer : D

34. For machining a mild steel workpiece using carbide tool, the maximum material will be removed at a temperature of
A. 50°C
B. 100°C
C. 175°C
D. 275°C
Answer : B

35. 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

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

37. 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

38. Which of the following statement is wrong?
A. The larger side rake angle produces chipping.
B. The smaller rake angle produces excessive wear and deformation in tool.
C. The side cutting edge angle (less than 15°) increases tool life.
D. The increase in nose radius decreases tool life.
Answer : D

39. 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

40. 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

41. The method of centre less grinding used to produce taper is
A. In-feed grinding
B. Through feed grinding
C. End feed grinding
D. Any one of these
Answer : C

42. The rake angle of a single point cutting tool corresponds to _________ of a twist drill.
A. Lip clearance angle
B. Helix angle
C. Point angle
D. Chisel edge angle
Answer : B

43. 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

44. Friction at the tool-chip interface can be reduced by
A. Decreasing the rake angle
B. Increasing the depth of cut
C. Decreasing the cutting speed
D. Increasing the cutting speed
Answer : D

45. The effective number of lattice points in the unit cell of simple cubic, body centred cubic, and face centred cubic space lattices, respectively, are
A. 1, 2, 2
B. 1, 2, 4
C. 2, 3, 4
D. 2, 4, 4
Answer : B

46. In metal machining, the work-tool contact zone is a zone where heat is generated due to
A. Plastic deformation of metal
B. Burnishing friction
C. Friction between the moving chip and the tool face
D. None of the above
Answer : B

47. When the temperature of a solid metal increases,
A. Strength of the metal decreases but ductility increases
B. Both strength and ductility of the metal decreases
C. Both strength and ductility of the metal increases
D. Strength of the metal increases but ductility decreases
Answer : A

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. 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

50. What type of fusion welding process is used for welding sheet metals of all engineering metals (except Cu, Ag) in automobile and air craft industries, pipe and tubing production?
A. Thermit welding
B. Electroslag welding
C. Resistance welding
D. Submerged arc welding
Answer : C