ORDNANCE FACTORY BOARD 2017 QUESTION PAPER FITTER

June 30, 2020

1. The operation of threading a drilled hole is called

(a) Lapping (b) Reaming (c) Threading (d) Tapping

2. In a tap drill size m.12×1.75 the size of the hole is

(a) 9.5mm (b) 9.86mm (c) 10.5mm (d)16mm

3. Number of taps generally used for hand tapping are

(a) One (b) Two (c) Three (d) Four

4. Which tool is used to cut an external thread ?

(a) Twist drill (b) Tap (c) Die (d) Halfnut

5. The process of precision Grinding of part with loose dust type abrasive is known as

(a) Honing (b) Buffing (c) Lapping (d) Polishing

6. Which of the following can be used to scribe lines parallel to the edge of a part

(a) Vernier Caliper (b) Screw gauge (c) Divider (d) Hermaphrodites

caliper

7. Feelar gauge is used to

(a) Concave surface (b) Convex surface

(c) Both concave and convex surface (d) Check the flat surface

8. Plug gauge are used to

(a) Measure diameter of the work piece (b) Measure diameter of the hole in the

work piece (c) Check the diameter of the hole in the work piece

(d) Check the Length of the work piece

9. Surface roughness on a drawing is represented by the symbol of

(a) Triangle (b) Circle (c) Square (d) Arrow

10. The diameter of a finish turned shaft can best be checked with a

(a) Combinations set (b) Slip Gauge (c) Height gauge (d) Micrometer

screw gauge

11. Least counts of Vernier caliper in metric system

(a) 0.001mm (b) 0.01mm (c) 0.02mm    (d) 0.05mm

12. Which of the following is not the angle measuring device

(a) Angle plate (b) Sine bar (c) Bevel protector (d) Angle gauge

13. Expressing a dimension as 18.3 +0.0,-0.1 mm is the case of

(a) Unilateral tolerance (b) Bilateral tolerance (c) Limiting dimension

(d) None

14. The zero error of a Micrometer is +0.001 mm. What will be the reading of

Micrometer to measure 0.715mm

(a) 0.716mm (b) 0.714mm (c) 0.717mm (d) 0.713mm

15. Taper ring gauges is used for

(a) Checking inside taper (b) Checking outside taper (c) Measuring inside taper

(d) Measuring outside taper

16. The Morse taper is denoted by the letter MT it is available from

(a) MT0 to MT4 (b) MT0 to MT5 (c) MT0 to MT6 (d) MT0 to MT7

17. SWG is used for measurements of

(a) Type of thread (b) Pitch of thread (c) Length of wire (d) Thickness of sheet

18. Property by which metal can be drawn into wires this property is called

(a) Malleability (b) Toughness   (c) Ductility (d) Elasticity

19. Converting of metal into sheet this property is called

(a) Plasticity (b) Ductility (c) Elasticity (d) Malleability

20. Which type of thread is oxygen cylinder regulator has

(a) Acme (b) Left hand (c) Double start (d) Right hand

21. What is the other name of center drill

(a) Cutting tool (b) Facing tool (c) Continuous drill bit (d) Tool heard

22. Which of the following is ferrous metal

(a) Brass (b) Aluminium (c)Cast iron (d) Lead

23. Ratio of oxygen and acetylene required for gas welding is

(a) 1:2 (b) 1:1 (c) 1:3 (d) 2:1

24. Which type of bolts is mostly used

(a) Chese head (b) Hook bolt   (c) Hexagonal bolts (d) Eye bolt

25. Which bolt fit in rectangular slot

(a) Square bolt (b) Hexagonal bolt (c) T-bolt (d) Hook bolt

26. Which fastener is semi permanent?

(a) Welding (b)Riveting (c) Nut-bolt (d) Forging

27. The materials used for coating the electrode is called

(a) Protective layer (b)Binder (c) Slag (d) Flux

28. Acetylene is stored in the gas cylinder

(a) In gaseous form (b) In liquid form (c) In solid form (d) Under high pressure

29. The purpose of jigs and fixtures is to

(a) Increase production rate (b) Increasing machining accuracy (c) Faciliate

Interchangeable manufacture (d) All of the above

30. Which one of the following methods produce gear by generating process

(a) Hobbing (b) Casting (c) Punching (d) Milling

31. Trimming is the process associated with

(a) Press work (b) Forging (c)Electro plating (d) Machining

32. In press operations, the size of the blanked part is dependent on the size of

(a) Punch (b) Die (c) Punch and Die (d) Die and Clearance

33. The characteristics that enables one material to cut another is its relative

(a) Toughness (b) Hardness (c) Ductility (d) Resilience

34. Chisels for metal cutting are hardened

(a) At tip (b) All over (c) At the Cutting edge   (d) At middle

35. The cutting edges of a standard twist drill are called

(a) Flutes (b) Lips (c) Wedges (d) Flanks

36. A standard ground drill has a point angle of

(a) 90 degree (b) 100 degree (c) 118 degree (d) 120 degree

37. A Reamer is used to correct the

(a) Size and position of drilled holes (b) Size and round of hole (c) Finish and

position of drilled hole (d) Finish and size of drilled hole

38. The process of improving cutting action of Grinding wheel is called

(a) Dressing operations (b) Turning operations (c) Cutting operations

(d) Facingoperations

39. A twist drill is specified by its shank, material and

(a) Lip angle (b) Diameter (c) Length of body (d) Flutes Length

40. A portable Drilling machine is specified by

(a) The of job it can hold (b) Maximum diameter of drill it can hold

(c) Spindle speed and feeds (d) Maximum spindle travel

41. When filing soft metal , the file teeth are clogged with minute particles of

metal. The file should be cleaned by

(a) Washing with water (b) Rubbing with cloth (c) Washing with dilute acid

   (d) Using file card

42. Find the type of file which cut material faster

(a)Double cut (b) Single cut (c) Second cut (d) Rasp cut

43. Files are specified by

(a) Length (b) Length and shape   (c) Length,shape and type of cut

(d) Type of cut

44. Select the type of file for filing an aluminum jobs

(a) Single cut file (b) Second cut file (c) Bastard file (d) Rasp cut file

45. Square files are used for filing

(a) Round shape job (b) Flat shape job (c) Triangular shape job (d) Square

shape job

46. Broken tap is removed by the help of

(a) Pin (b) Chisel (c) Hammer (d) Stud Extractor

47. Metal used for making face plate

(a) Carbon steel (b) Tool steel (c) Wrought iron (d) Cast iron

48. The color of the cast iron is

(a) White (b) Red (c) Black (c) Yellow

49. The surface speed of vitrified bond wheel is

(a) 1990 RPM (b) 2090 RPM (c) 1530 RPM (d) 2100 RPM

50. Angle of the angle plate is

(a) 30 degree (b) 45 degree (c) 60 degree (d) 90 degree

51. Find the temporary joint of the following

(a) Welded joint (b) Riveted joint (c) Solderd joint (d) Press fit joint

52. Grinding wheel in good condition makes the

(a) Flat sound (b) Dull sound (c) Ringing sound (d)Disable sound

53. The other name of the feelar gauge is known as

(a) Gap gauge (b) Clearance gauge (c) Profile gauge (d) Thickness gauge

54. In a small hole gauge to check the minimum size of a hole is

(a) 3.8 mm (b) 3.5 mm (c) 3.6 mm (d) None

55. The alloy containing more than 2% iron is known as

(a) Mild steel (b) Cast iron (c) Highspeed steel (d) Low alloy steel

56. Pig iron is

(a) Impure form of iron (b) 90% pure form of iron (c) 95% pure form of iron

  (d) 99.9% pure form of iron

57. Find out the tap drill size the apply formula is to be

(a) Tap size =D×0.8 (b) Tap size=D%8  (c) Drill size = T-2d (d) Drill siz=T-

2dp

58. The movable jaw of a bench vice is not moving even though the spindles is

turned it is due to

(a) Fixed and movable jaws are over tight (b) Spindle pin is broken (c) Spring is

not functioning (d) Threads on Spindle are slightly worn out

59. The type of drive used for general purpose Drilling work is type

(a) 'S' type (b) 'H' type (c) 'R' type (d) 'N' type

60. Commonly used unit of feed in drilling operations is

(a) mm (b) mm/rev (c) mm/sec (d) mm/min

61. If a straight line stands on another straight line at any point then the sum of

the two angles thus formed is equal to

(a) 180 deg (b) 90 deg (c) 360 deg (d) 145 deg

62. Hand vice is used to hold

(a) Very small objects (b) Small objects

(c) Wires or small diameter rods (d) None

63. Jaw plate of bench vice is made of

(a) Cast iron (b) High carbon steel (c) Alloy steel (d) Cast steel

64. Gun metal is an alloy of

(a) Copper,Tin and Lead (b) Copper,Lead and Zinc (c) Copper, Tin and Zinc

   (d) None

65. Pipe vice grips the pipe at

(a) Two points (b) Three points (c) Four points (d) Six points

66. Which of the following is non ferrous metal?

(a) Mild steel (b) Cast iron (c) High carbon steel (d) Brass

67. The power is Transmitted by lead screw to the carriage in a lathe through

(a) Gear box (b) Worm and gear (c) Rack and Pinion (d) Halfnut

68. For machining a irregular shaped job on a lathe it should be held by

(a) Collet chuck (b) Magnetic chuck (c) Three jaw chuck (d) Four jaw chuck

69. Which of the lathe parts mentioned below is not provided with a power feed

(a) Carriage (b) Compound rest (c) Cross slide (d) Feed screw

70. Taper shank drill Reamer lathe centre are used on Morse taper is

(a) MT0 to MT1 (b) MT0 to MT3 (c) MT0 to MT4 (d) MT0 to MT1

71. The Reamer is always removed from the finished holes

(a) By removing the drill pressure (b) By stopping the machine (c) By slowing

the machine (d) Before stopping the machine

72. In which of the following operations on lathe , the spindle speed will be

minimum

(a) Knurling (b) Taper Turning (c) Parting off (d) Thread cutting

73. Halfnut is connected with

(a) Miling machine (b) Locking device (c) Jigs and fixtures (d) Thread

cuttings on lathe

74. Lathe spindle has got

(a) Internal thread   (b) External thread (c) Taper thread (d) No thread

75. Which of the following lathe operations requires the cutting edge of a tool bit

be placed exactly on the work center line

(a) Boring (d) Drilling (c) Facing (d) Turning

76. Lathe centre are provided with the following standard taper

(a) Morse (b) British (c) Metric (d) Brown and sharp

77. Brown and sharp tapers is generally used in

(a) Lathe (b) Milling machine (c) Shapers (d) Drills

78. Quick return mechanism is used in

(a) Milling machine (b) Broaching machine (c) Grinding machine (d) Slotting

machine

79. The purpose of chasing dial on lathe is to achieve

(a) Taper Turning (b) Cutting of taper thread (c) Cutting of multiple thread

(d) Picking up the thread accurately at the beginning of each cut

80. The body of aeroplanes is made up of aluminum because to its

(a) Colour (b) Melting point (c) Point (d) Weight