Manufacturing & Production Engineering 1000+ MCQ with answer for CTET

1. In a single point turning operation with a cemented carbide and steel combination having a Taylor exponent of 0.25, if the cutting speed is halved, then tool life will become
A. Half
B. Two times
C. Eight times
D. Sixteen times
Answer : D

2. 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

3. 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

4. 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

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

6. High speed steel cutting tools operate at cutting speeds _________ than carbon steel tools.
A. 2 to 3 times lower
B. 2 to 3 times higher
C. 5 to 8 times higher
D. 8 to 20 times higher
Answer : B

7. 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

8. The material which on machining produces chips with built up edge is
A. Brittle material
B. Tough material
C. Hard material
D. Ductile material
Answer : D

9. The hardness of a grinding wheel is specified by
A. Brinell hardness number
B. Rockwell hardness number
C. Vickers pyramid number
D. Letter of alphabet
Answer : D

10. 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

11. The floating position of the holding fixture in a rotary transfer device is used to
A. Improve the accuracy of location
B. Reduce the tendency to over-index
C. Improve upon the acceleration and deceleration characteristics
D. Reduce the cycle time
Answer : D

12. The parameter which completely defines the chip formation in a metal cutting process is
A. Shear angle
B. Chip-tool contact length
C. Both (A) and (B)
D. None of these
Answer : C

13. A single point tool has
A. Rake angle
B. Cutting angle
C. Lip angle
D. All of these
Answer : D

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

15. What is the type of welding defect caused due to poor deposition of weld rod is called?
A. Porosity
B. Undercut
C. Under fill
D. Crack
Answer : A

16. The point angle of a drill, for drilling stainless steel, is
A. 90°
B. 118°
C. 135°
D. 150°
Answer : C

17. In ultrasonic machining, the metal is removed by
A. Using abrasive slurry between the tool and work
B. Direct contact of tool with the work
C. Maintaining an electrolyte between the work and tool in a very small gap between the two
D. Erosion caused by rapidly recurring spark discharges between the tool and work
Answer : A

18. A grinding wheel is said to be of _________ if the abrasive grains can be easily dislodged.
A. Soft grade
B. Medium grade
C. Hard grade
D. None of these
Answer : A

19. 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

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. The shear velocity is the velocity of
A. Tool relative to the workpiece
B. Chip relative to the tool
C. Tool along the tool face
D. None of these
Answer : D

22. Hardness of green sand mould increases with
A. Increase in moisture content beyond 6 percent
B. Increase in permeability
C. Decrease in permeability
D. Increase in both moisture content and permeability
Answer : C

23. In a metal arc welding process, metal transfer across the arc may take place by a method of material transfer where the metal transfers across the arc is in larger drops. This is at the rate of 100 drops / sec or less, what is this known as
A. Globular transfer
B. Spray transfer
C. GMAW practice
D. Dip transfer
Answer : D

24. The lathe centres are provided with standard taper known as
A. Morse taper
B. Seller's taper
C. Chapman taper
D. Brown and Sharpe taper
Answer : A

25. 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

26. Lathe bed is made of
A. Mild steel
B. Alloy steel
C. Pig iron
D. Chilled cast iron
Answer : D

27. A solid cylinder of diameter 100 mm and height 50 mm is forged between two frictionless flat dies to a height of 25mm. The percentage change in diameter is
A. 0
B. 2.07
C. 20.7
D. 41.4
Answer : D

28. Grinding wheels should be tested for balance
A. Only at the time of manufacture
B. Before starting the grinding operation
C. At the end of grinding operation
D. Occasionally
Answer : D

29. A 15 mm drilling machine means that it can drill a hole
A. Of maximum diameter 15 mm
B. In 15 mm thick plates
C. Having cross-sectional area of 15 mm²
D. None of these
Answer : A

30. The ratio between two consecutive spindle speeds for a six-speed drilling machine using drills of diameter 6.25 to 25 mm size and at a cutting velocity of 18 m/min is
A. 1.02
B. 1.32
C. 1.66
D. 1.82
Answer : B

31. The relation between tool life (T) and cutting speed (V) is VTn = Constant. In this relation, the value of n depends upon
A. Work material
B. Tool material
C. Working conditions
D. Type of chip produced
Answer : B

32. 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

33. The lip angle of a single point tool is usually
A. 20° to 40°
B. 40° to 60°
C. 60° to 80°
D. None of these
Answer : C

34. In a plain milling cutter, the chip space between the back of one tooth and the face of the next tooth is called
A. Face
B. Fillet
C. Gash
D. Land
Answer : C

35. 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

36. A CNC vertical milling machine has to cut a straight slot of 10 mm width and 2mm depth by a cutter of 10 mm diameter between points (0,0) and (100,100) on the XY plane (dimensions in mm). The feed rate used for milling is 50 mm/min, milling time for the slot (in seconds) is
A. 120
B. 170
C. 180
D. 240
Answer : B

37. Flank wear depends upon the
A. Hardness of the work and tool material at the operating temperature
B. Amount and distribution of hard constituents in the work material
C. Degree of strain hardening in the chip
D. All of these
Answer : B

38. The angle made by the face of the tool and the plane parallel to the base of cutting tool is called
A. Rake angle
B. Cutting angle
C. Clearance angle
D. Lip angle
Answer : A

39. A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through hole in a mild steel plate 20 mm thickness. The depth of cut in this drilling operation is
A. 0.2 mm
B. 10 mm
C. 20 mm
D. 100 mm
Answer : C

40. As the cutting speed increases, the tool cutting forces
A. Remain constant
B. Increases
C. Decreases
D. First increases and then decreases
Answer : C

41. 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

42. In transverse grinding
A. The work is reciprocated as the wheel feeds to produce cylinders longer than the width of wheel face
B. The work rotates in a fixed position as the wheel feeds to produce cylinders equal to or shortr than the width of wheel face
C. The work is reciprocated as the wheel feeds to produce cylinders shorter than the width of wheel face
D. The work rotates in a fixed position as the wheel feeds to produce cylinders longer than the width of wheel face
Answer : A

43. A grinding wheel is said to be of _________ if it holds the abrasive grains more securely.
A. Soft grade
B. Medium grade
C. Hard grade
D. None of these
Answer : C

44. Work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm on 1.6 mm thick mild steel tube. Welding cycle consists of 3 cycles on and 2 cycles off Power supply is at 50 Hz. Calculate R.P.M. and energy requirement of the above circular electrodes assuming effective resistance between electrodes as 100 ohm.
A. 2.17 rpm, 600 joules
B. 6.8 rpm, 6 joules
C. 5.03 rpm, 600 joules
D. 22 rpm, 600 joules
Answer : A

45. In ECM, the material removal is due to
A. Corrosion
B. Erosion
C. Fusion
D. Ion displacement
Answer : D

46. 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

47. 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

48. The trade name of a nonferrous cast alloy composed of cobalt, chromium and tungsten is called
A. Ceramic
B. Stellite
C. Diamond
D. Cemented carbide
Answer : B

49. 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

50. 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