Manufacturing & Production Engineering 1000+ MCQ with answer for SSC MTS

1. The lead screw of a lathe has _________ threads.
A. Single start
B. Double start
C. Multi-start
D. Any one of these
Answer : A

2. Which of the following operation is first performed?
A. Spot facing
B. Boring
C. Tapping
D. Drilling
Answer : B

3. 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

4. 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

5. Which of the following statement is correct in regard to centreless grinding?
A. The workpiece is supported throughout its entire length as grinding takes place.
B. It is a continuous process and adopted for production work.
C. It requires no holding device for the work.
D. All of the above
Answer : D

6. What is the type of welding defect caused due to shrinkage during solidification and by weld stresses called?
A. Incomplete fusion
B. Lamellar tearing
C. Mismatch
D. Shrinkage void
Answer : B

7. The cutting angle of a flat drill varies from
A. 3° to 8°
B. 20° to 30°
C. 60° to 90°
D. 90° to 120°
Answer : D

8. The correct sequence of the following parameters in order of their maximum to minimum influence on tool life is
A. Feed rate, depth of cut, cutting speed
B. Depth of cut, cutting speed, feed rate
C. Cutting speed, feed rate, depth of cut
D. Feed rate, cutting speed, depth of cut
Answer : C

9. The cutting speed for drilling aluminium, brass and bronze 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 : D

10. 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

11. Crater wear is mainly due to the phenomenon known as
A. Adhesion of metals
B. Oxidation of metals
C. Diffusion of metals
D. All of these
Answer : C

12. The negative rake is usually provided on
A. High carbon steel tools
B. High speed steel tools
C. Cemented carbide tools
D. All of these
Answer : C

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. The tool made of cemented carbide wear out faster at
A. Slow speeds
B. Medium speeds
C. Fast speeds
D. Very fast speeds
Answer : A

15. 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

16. For machining a mild steel workpiece by a high speed steel tool, the average cutting speed is
A. 5 m/min
B. 10 m/min
C. 15 m/min
D. 30 m/min
Answer : D

17. 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

18. A coarse 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 : B

19. In metal machining, the zone where the heat is generated due to friction between the moving chip and the tool face, is called
A. Friction zone
B. Work-tool contact zone
C. Shear zone
D. None of these
Answer : A

20. 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

21. 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 resistancebetween 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

22. 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

23. In a plain milling cutter, the portion of the gash adjacent to the cutting edge on which the chip impinges is called
A. Face
B. Fillet
C. Land
D. Lead
Answer : A

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

25. In determining the various forces on the chip, Merchant assumed that the
A. Cutting edge of the tool is sharp and it does not make any flank contact with the workpiece
B. Only continuous chip without built-up-edge is produced
C. Cutting velocity remains constant
D. All of the above
Answer : D

26. 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

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

28. In metal cutting, use of low feeds and high cutting speeds is desired when the objective is
A. High metal removal rate
B. Dry machining
C. Use of soft cutting tool
D. Surface finish
Answer : D

29. The broaching operation in which either the work or the tool moves across the other, is known as
A. Pull broaching
B. Push broaching
C. Surface broaching
D. Continuous broaching
Answer : C

30. Which of the following arc welding processes does not use consumable electrodes?
A. GMAW
B. GTAW
C. Submerged Arc Welding
D. None of these
Answer : B

31. The method of grinding used to produce internal cylindrical holes and tapers, is
A. Internal cylindrical grinding
B. Form grinding
C. External cylindrical grinding
D. Surface grinding
Answer : A

32. For harder alloy steel, the point angle of the drill is kept
A. Equal to 118°
B. Less than 118°
C. More than 118°
D. Any one of these
Answer : C

33. During normalizing process of steel, the specimen is heated
A. Between the upper and lower critical temperature and cooled in still air.
B. Above the upper critical temperature and cooled in furnace.
C. Above the upper critical temperature and cooled in still air.
D. Between the upper and lower critical temperature and cooled in furnace.
Answer : C

34. Match the following metal forming processes with their associated stresses in the work piece.

Metal forming process	Types of stress
1. Coining	P. Tensile
2. Wire Drawing	Q. Shear
3. Blanking	R. Tensile and compressive
4. Deep Drawing	S. Compressive

A. 1-S, 2-P, 3-Q, 4-R
B. 1-S, 2-P, 3-R, 4-Q
C. 1-P, 2-Q, 3-S, 4-R
D. 1-P, 2-R, 3-Q, 4-S
Answer : A

35. 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

36. The taper on the lathe spindle is
A. 1 in 10
B. 1 in 15
C. 1 in 20
D. 1 in 30
Answer : C

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

38. In DC arc welding, if leads are arranged in work as Negative pole of the welding arc and electrode as Positive pole of the welding arc, the arrangement is known as
A. Fusion
B. Reverse polarity
C. Forward welding
D. Direct polarity
Answer : B

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

40. 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

41. 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

42. 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

43. 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

44. Shrinkage allowance on pattern is provided to compensate for shrinkage when
A. The temperature of liquid metal drops from pouring to freezing temperature
B. The metal changes from liquid to solid state at freezing temperature
C. The temperature of solid phase drops from freezing to room temperature
D. The temperature of metal drops from pouring to room temperature
Answer : C

45. In the relation VTⁿ = C, the value of n for carbide 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 : B

46. The relief or clearance at the cutting edge of a flat drill varies from
A. 3° to 8°
B. 20° to 30°
C. 60° to 90°
D. 90° to 120°
Answer : A

47. Which of the following statement is wrong as regard to down milling?
A. It can not be used on old machines due to backlash between the feed screw of the table and the nut.
B. The chips are disposed off easily and do not interfere with the cutting.
C. The surface milled appears to be slightly wavy.
D. The coolant can be poured directly at the cutting zone where the cutting force is maximum.
Answer : C

48. 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

49. What is the type of welding defect caused due to poor manipulation of weld rod or a dirty joint called?
A. Porosity
B. Undercut
C. Under fill
D. Crack
Answer : B

50. 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