# ITI Mechanic Questions and Answers

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## MCQ Objective Questions and Answers for ITI Mechanic Jobs

1. Case hardening is done on
(A) Cast Iron
(B) High Carbon Steel
(C) High Speed Steel
(D) Mild Steel

2. Which gear is used for power transmission in parallel shafts?
(A) Worm gear
(B) Rack and pinion
(C) Helical gear
(D) Bevel gear

3. Main property of cutting fluid
(A) Specific gravity
(B) Specific heat
(C) Ductility
(D) Viscosity

4. What SAE 30 number indicate?
(A) Flash point
(B) Viscosity
(C) Pour point
(D) Fire point

5. A tool which is used to enlarge a previously drilled hole is known as
(A) Boring tool
(B) Turning tool
(C) Form tool
(D) Facing tool

6. Which one of the following tapers is used for making shank of lathe centres?
(A) Jemo taper
(B) Non-standard taper
(C) Brown and Sharp taper
(D) Morse standard taper

7. In a shaper rotary motion is converted into reciprocating motion by means of
(A) Shaft and pulley
(B) Rocker arm and bull gear
(C) Flack and pinion
(D) Worm and worm wheel

8. The number of threads per inch can be checked with a
(A) Tool gauge
(B) Metric rule
(C) Ring gauge
(D) Screw pitch gauge

9. Slotter is specified by
(A) Table diameter
(B) Maximum stroke of its ram
(C) Number of strokes per minute
(D) All of the above

10. While planning a work piece the teed is provided intermittently at the
(A) Middle of return stroke
(B) Middle of forward stroke
(C) Forward stroke
(D) Return stroke

11. Type “A” arbor is used for mounting
(A) Large size face milling cutter
(B) Drills, reamers, clutches etc.
(C) Shell end mill cutter
(D) End mill cutter

12. Solid milling cutters are manufactured from
(A) Stellite
(B) Ceramic
(C) High speed steel
(D) Sintered carbide

13. In spur gear of pitch diameter = 168 mm, module = 3.25 mm, the number of teeth will be
(A) 48 teeth
(B) 24 teeth
(C) 72 teeth
(D) 96 teeth

14. How many seconds are there in angle of 5 degree?
(A) 6000
(B) 9000
(C) 1800
(D) 18000

15. Fire is a combination of
(A) Fuel, light and oxygen
(B) Fuel, heat and oxygen
(C) Fuel, heat and carbon dioxide
(D) Fuel, light and nitrogen

16. The minimum measurement that can be read with the help of a steel rule is
(A) 0.01 mm
(B) 0.02 mm
(C) 0.05 mm
(D) 0.50 mm

17. Drill sleeve is used when the taper shank of the drill is
(A) Smaller than the machine spindle
(B) Larger than the machine spindle
(C) Equal to the machine spindle
(D) None of the above

18. Which one of the following metals has less carbon content?
(A) Cast iron
(B) Pig iron
(C) Wrought iron
(D) Plane carbon steel

19. Which one of the following processes is used for removing scratches from previous operations?
(A) Painting
(B) Oxidation
(C) Polishing
(D) Enameling

20. Which one of the following properties is the most essential for the metals in the process of casting, welding, brazing and soldering?
(A) Fusibility
(B) Malieability
(C) Tenacity
(D) Plasticity

## Questions for ITI Jobs

Refrigeration and Air Conditioner Carpenter
Automobile Engineering Lineman
Printing Technology Wireman
Tool and Die Maker Electrician
Boiler Operator Electrical
Pump Operator Mechanic
Architectural Draftsman Surveyor
Draughtsman Civil Instrument Mechanic
Masonry Electronics Mechanic
Welder Information Technology
Fitter Computer Hardware
Turner Steel Fabricator
Plumber Electroplater

(A) Alloy steel
(B) High speed steel
(C) High carbon steel
(D) All of the above

22. Least count of vemier bevel protractor
(A) One minute
(B) Two minutes
(C) Five minutes
(D) Ten minutes

23. Stub arbor type “A” used for mounting
(A) Plain milling cutter
(B) Face milling cutter
(C) Side and face milling cutter
(D) Shell end milling cutter

24. The back side of an angle plate has ribs. What is its function?
(A) Easy in making
(B) For lifting the angle plate
(C) For clamping
(D) Protect the angle plate from distortion

25. V-Block is available in how many grades?
(A) A, B and C
(B) A and B
(C) 1, 2 and 3
(D) 1 and 2

26. What type of thread on bench vice spindle is?

27. Duraluminlum is a alloy of
(A) Silver
(B) Nickel
(C) Copper
(D) Aluminium

28. The mechanical property of metal is
(A) Colour
(B) Weight
(C) Toughness and brittleness
(D) Magnetism

29. Annealing is done
(A) To reduce distortion
(B) To increase the hardness
(C) To increase the toughness
(D) To increase the machining property

30. Hole tolerance is size difference
(A) Maximum hole and minimum hole
(B) Maximum hole and maximum shaft
(C) Maximum hole and minimum shaft
(D) Minimum hole and minimum shaft

31. Lathe bed is made of
(A) High speed steel
(B) High carbon steel
(C) Mild steel
(D) Cast iron

32. Back gear is used in conepulley head stock on lathe
(A) To increase speed
(B) To decrease speed
(C) To change the direction of speed
(D) None of these

33. Which type of chuck is used for self alignment?
(A) Magnetic chuck
(B) Three jaw chuck
(C) Four jaw chuck
(D) None of these

34. What is the backbone of lathe machine?
(A) Lathe bed
(B) Tool post
(C) Tail stock
(D) Carriage

35. To convert circular motion into longitudinal motion which type of bolt is used?
(A) Cotter bolt
(B) Sheckle bolt
(C) Levis bolt
(D) Eye bolt

36. Which type of nut is used in precision instrument?
(A) Ring nut
(B) Dome nut
(C) Cap nut
(D) Thumb nut

37. Jig and fixtures are made in such type that
(A) To guide the cutting tool
(B) To hold the job strongly
(C) To prevent the job from slipping
(D) To get the maximum production in short time

38. Main use of coolant on machine tool
(A) To minimize the friction between two mating parts
(B) To cool the parts of machine
(C) To wet the two mating parts
(D) To save the machine tool from heating

39. Counter boring is done for
(B) Finishing bored holes
(C) Enlarging holes to accurate size
(D) Deburring hole ends

40. Quick return mechanism is provided on shaper to reduce the time required for
(A) Forward stroke
(B) Return stroke
(C) Forward and return stroke
(D) None of these

41. Clapper box of a shaper is used to
(A) Avoid overhanging of tools
(B) Lift the tool in the middle of strokes
(C) Lift the tool during return stroke
(D) Lift the tool during cutting stroke

42. The size of a planer is determined by the maximum length of the
(A) Housing
(B) Work piece
(C) Stroke
(D) Bed

43. An angular surface is machined on a planer
(A) By fixing the job at an angle
(B) By swivelling the tool head of the planer
(C) By swivelling the tool head and fixing the tool at an angle
(D) By tilting the table of the planer

44. Gang milling operation is usually performed when
(A) Single piece to be milled
(B) Repair work is to be done
(C) For mass production
(D) None of these

45. In a spur gear the pitch diameter 40 mm, outside diameter 48 mm, module 4 mm, the number of teeth will be
(A) 10 teeth
(B) 20 teeth
(C) 30 teeth
(D) 40 teeth

46. Slitting saw is used for
(A) Angular machining
(B) Cutting key way
(C) Cutting convex grooves
(D) Cutting of long slot

47. Truing of grinding wheel is done by which tool?
(A) Diamond tool
(B) V-tool
(C) White tool
(D) Hound nose tool

48. Cutting tool used in planning machine is
(A) Multipoint cutting tool
(B) Single point cutting tool
(C) End mill cutter
(D) None of these

49. Which of the following is not the part of combination set?
(C) Stock

50. Which one of the following materials is used for making a grinding wheel?
(A) Calcium carbonate
(B) Sand
(C) Granite
(D) Silicon carbide

51. Which one of the following cutting fluids is used during grinding mild steel?
(A) Paraffin
(B) Soluble oil
(C) Mineral oil
(D) Kerosene

52. The distance a drill moves into the work for each revolution of the spindle is called
(A) Speed of drill
(B) Cutting speed of drill
(C) Feed of drill
(D) Depth of drill

53. The difference between maximum limit of size to its corresponding basic size of a component is
(A) Tolerance
(B) Lower limit
(C) Actual deviation
(D) Upper deviation

54. C N C machines are operated by controller of
(A) Programme
(B) Cam
(C) An operator
(D) Board system

55. You have to cut threads on aluminium, which one of the following coolants will you use?
(A) Kerosene
(B) Lard oil
(C) Soluble oil
(D) Vegetable oil

56. Indexing head mechanism works with
(A) Rack and gear
(B) Worm and worm gear
(C) Two helical gear
(D) Two bevel gear

57. The distance between two teeth is called
(B) Margin
(C) Pitch
(D) None of these

58. Which one of the following standard tapers is self holding type?
(A) Morse taper
(B) Matric taper
(C) Brown and sharp taper
(D) Jemo taper

59. The taper shank drills are held on the machine by means of
(A) Chucks
(B) Drifts
(C) Sleeves
(D) Vice

60. The distance which the cutting edge of a tool passes over the material in a minute while machining is called
(A) RPM
(B) Machine speed
(C) Cutting speed
(D) Feed

61. Centre drilling is an operation of
(A) Drilling and counter sinking
(B) Marking the centre location before drilling
(C) Drilling and counter boring
(D) Enlarging the diameter of a hole

62. The feeler gauge is used for
(A) Checking the accuracy of hole
(B) Checking surface roughness
(C) Checking the radius of work
(D) Checking the gap between mating parts

63. The size of three-jaw chuck is specified by
(A) The diameter of the body of the chuck
(B) The thickness of each jaw
(C) The size of each jaw
(D) Width of the body of the chuck

64. One of the taper turning methods is by offsetting the tail stock. Which part of the tail stock is offset?
(A) Body
(B) Base
(C) Carriage
(D) Spindle

65. Tap is used for
(A) Making round hole on a job
(B) Making internal threads in a hole
(C) Making external threads on a rod
(D) All of the above