NCVT ITI Turner 3rd Semester Question Paper : While preparing for any exam, you should look at the question paper of that exam so that you will know what type of questions were asked in this exam. So if you are preparing for ITI Turner Theory, then in this post we are giving you the 3rd Semester Question Paper of ITI Turner Theory, which you can solve yourself and improve your preparation and along with it its answers are given so that you will also get its correct answer.
NCVT ITI Turner 4th Semester Question Paper
NCVT ITI Turner 3rd Semester Question Paper
1. A multi-start thread is cut on a lathe using which of the following?
•With a chaser
•With a die head
•With a single-point tool
•With a split die
Answer. With a single-point tool
2. The sideways of any machine are frequently lubricated by ……….
•Oil can
•Grease gun
•Ring lubricator
•Wick feed lubricator
Answer. Oil can
3. Which of the following is not the objective of GREECE?
•To dissipate the heat generated in the bearing
•To prevent metal to metal contact and reduce friction
•To prevent any foreign material like dust, dirt etc. from entering the bearing
•To provide cushion for loads and shocks
Answer. To dissipate the heat generated in the bearing
4. Which of the following statements is correct with reference to lathe cutting tools?
•Red hotness temperature is higher for high carbon steel than for carbide tools
•The property of tool chipping off with vibration is higher for cemented carbide tools than for HSS tools
•Ceramic tools have higher resistance to shock than HSS tools
•HSS tools can operate at higher spindle speeds and feeds than cemented carbide tools
Answer. The property of tool chipping off with vibration is higher for cemented carbide tools than for HSS tools
5. The sine bar is made with four or five equally spaced holes on its body. What is the purpose of these holes?
•Easy handling of sign bar
•Reducing the weight of sign bar
•Preventing distortion of top surface
•Giving good look to sign bar
Answer. Easy handling of sign bar
6. The depth of the tooth space of a gear below the pitch circle is called ……….
•Addendum
•Dedendum
•Center Distance
•Crest
Answer. Dedendum
7. The allowed deviation for levelling of machine is ………..
•0.03/100 mm
•0.03/200 mm
•0.03/300 mm
•0.03/400 mm
Answer. 0.03/300 mm
8. Sine bars are available in standard sizes. Which of the following is not a standard size of sine bar?
•100 mm
•200 mm
•250 mm
•300 mm
Answer. 300 mm
9. Hardness of slip gauge should be………….
•Above 63 HRC
•58 HRC
•55 HRC
•50 HRC
Answer. Above 63 HRC
10. Which of the following factors will not affect the selection of cutting speed?
•Diameter of work piece
•Work piece material
•Tool material
•Operation to be performed
Answer. Diameter of work piece
11. Which of the following angles of rough turning tool depends on the selected feed rate?
•Top rake angle
•Side rake angle
•Front clearance angle
•Side clearance angle
Answer. Side clearance angle
12. Which of the following is a common method for applying cooling fluid to the tool point?
•Dry air
•Kerosene
•Machine oil
•Soft water
Answer: Machine oil
13. BA The angle of the thread is ……….
•45 degrees
•29 degrees
•47.5 degrees
•60 degrees
Answer. 47.5 degrees
14. As per Indian Standard a specified set of slip gauges having ……… is used.
•81 pieces
•112 pieces
•120 pieces
•130 pieces
Answer. 120 pieces
15. The purpose of chip breakers is to break continuous long chips. Which of the following is found on a throw-away insert with a chip breaker holder?
•A piece of sheet metal clamped in a holder in the path of the coil
•A step ground on the cutting edge as well as a throw-away insert
•A small groove ground on the cutting edge
•A carbide bit positioned and screwed onto the top face of the bit
Answer. A carbide bit positioned and screwed onto the top face of the bit
16. Which of the following measures should be taken to prevent chipping off of the tool cutting edge?
•Increasing the feed rate
•Decreasing the cutting speed
•Reducing the nose radius
•Using negative top rack
Answer. Using negative top rack
17. The width of the tool used to cut a 10 mm pitch square thread is ……….
•10 mm
•7.5mm
•5 mm
•2.5 mm
Answer. 5 mm
18. Which of the following is not a property of a good lubricant?
•No change in viscosity due to variations in temperature
•Reducing friction in machine parts
•Take up surface pressure between sliding parts
•Becoming thicker after prolonged use
Answer. Becoming thicker after prolonged use
19. To protect the lathe bed guide wedge from damage during chuck mounting. …………..
•Take help of supervisor
•Support it with screw jack
•Lift it with head crane
•Place a piece of wood on the guide wedge
Answer. Place a piece of wood on the guide wedge
20. The sum of the addendum and dedendum of a tooth of a gear is called ……….
•whole depth
•working depth
•tooth depth
•root depth
Answer. whole depth
21. Instant HSS tool bits are more beneficial for operation………….
• Boring
• External Shredding
• Internal Threading
• All of these
Answer. All of these
22. Which of the following statements is correct regarding half nut?
•It is a detachable part from the saddle
•It is an integral part of the saddle
•It is an integral part of the apron
•It is a detachable part from the apron
Answer. It is a detachable part from the apron
23. Rough turning of a workpiece with a carbide tool produces long chips. Which of the following is the correct way to get rid of such chips?
•Stopping the power feed at intervals to break the chips
•Changing the rack angle
•Providing chip breaker on the tool
•Using a metal hook and pulling out the chips
Answer. Providing chip breaker on the tool
24. Grade – I slip gauges are used in……….
•Workshop by operator
•Inspection room
•Either in workshop or inspection
•Neither in workshop nor inspection
Answer: Inspection room
25. Leveling bolts are used for………?
•To provide load support for the machine
•To adjust the height of the machine
•Rigidity of the machine
•None of these
Answer. To adjust the height of the machine
26. Which of the following centres is correct during taper cutting by set over method?
•Plain center
•Half center
•Bal center
•Revolving center
Answer. Child Center
27. If the cutting tool is set below the center height on a lathe, what effective change will occur regarding the tool geometry?
•Front clearance angle increases
•Front clearance angle decreases
•Front clearance angle remains the same
•Front clearance angle becomes zero
Answer: Front clearance angle increases
28. The compound slide swivel base is set at an angle of 45 degrees to the center line of the lathe. The degree reading on the cross slide index will be ……….
•135°
•90°
•45°
•30°
Answer. 45°
29. Which of the following materials can be forged to any desired shape for lathe cutting tools?
•High Speed Steel
•High Carbon Steel
•Stellite
•Tungsten Carbide
Answer. High Carbon Steel
30. A carbide tipped tool with blue marking is used on a lathe. Which of the following materials can be machined with this tool?
•Brass
•Steel
•Plastic
•Grey Cast Iron
Answer. Steel
31. If the cutting tool is set below the centre height on a lathe, what effective change will occur?
•Front clearance angle increases
•Front clearance angle decreases
•Front clearance angle remains the same
•Front clearance angle becomes zero
Answer: Front clearance angle increases
32. Which grade of slip gauge is used for general use in workshop?
•Grade – 0
•Grade – i
•Grade – ii
•None of these
Answer. Grade – ii
33. A 24 tooth gear is fixed on a stud as a driver gear. After the first start and before the second start the driver gear should be turned ……….
•24 teeth
•18 teeth
•12 teeth
•6 teeth
Answer. 12 teeth
34. In parting off a tool, what angle will allow the sides to penetrate the work without rubbing?
•Top rake angle
•Front clearance angle
•Side clearance angle
•Back clearance angle
Answer. Back clearance angle
35. As the diameter of the workpiece increases, the spindle speed (for the same cutting speed) ………..
•It increases
•It decreases
•It remains the same
•None of these
Answer. It increases
36. What cutting speed range is set for turning mild steel using HSS tools?
•15-20 m/min
•35-50 m/min
•50-80 m/min
•70-100 m/min
Ans. 35–50 m/min
37. For plane turning a 60 mm diameter workpiece with a permissible cutting speed of 30 m/min what should be the rpm of HSS tool used?
•80 rpm
•159 rpm
•192 rpm
•318 rpm
Answer. 159 rpm
38. A special gear having 127 teeth or 63 teeth which can be used for cutting metric threads in a lathe with a British lead screw is known as ……….
•Idler gear
•Change gear
•Translating gear
•Compound gear
Answer. Translating gear
39. The surface joining the crest and root of a thread is called its ………..
•Crest
•Flank
•Depth
•Pitch
Answer. Flank
40. Preventive maintenance is ……….
•Complete lubrication and necessary repair work of the machine is done by the maintenance department before it breaks down.
•Machine work is done on any fault identified during work.
•Done to avoid maintenance of the machine.
•None of the above
. Answer. Comprehensive lubrication and necessary repair work of the machine is done by the maintenance department before it breaks down.
41. Lubrication is necessary for ……….
•Machinery running smoothly while taking less load
•Machinery running fast
•Machinery stopping suddenly
•Producing workpieces with high accuracy
Answer. Machineery running smoothly while taking less load
42. Which of the following is used for checking the runout of the internal taper of a machine spindle?
•Dial Test Indicator
•Test Mandrel and Dial Test Indicator
•Precision Height Gauge
•Test Mandrel and Precision Height Gauge
Answer. Test Mandrel and Dial Test Indicator
43. The difference in measurement between machined and unmachined diameter is equal to…………
•Depth of cut
•Half the depth of cut
•Twice the depth of cut
•None of these
Answer: Twice the depth of cut
44. In a gear, dividing the pitch diameter by the number of teeth is called ……….
•Module
•Pitch
•Addendum
•Dedendum
Answer. Module
45. Tumbler gear unit is a part of a centre lathe, it is provided for………….
•Changing the direction of feed
•Transmitting motion from the feed shaft to the carriage
•Changing the direction of work rotation
•Changing the spindle speed
Answer. Changing the direction of feed
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