Engineering Exam Questions PDF

159/24 Question Booklet Sl. No. Question Booklet Alpha Code A A Total Number of Questions : 100 Time : 90 Minutes...

159/24 Question Booklet Sl. No. Question Booklet Alpha Code A A Total Number of Questions : 100 Time : 90 Minutes Maximum Marks : 100 INSTruCTIoNS To CANdIdATeS 1. The Question Paper will be given in the form of a Question Booklet. There will be four versions of Question Booklets with Question Booklet Alpha Code viz. A, B, C & d. 2. The Question Booklet Alpha Code will be printed on the top left margin of the facing sheet of the Question Booklet. 3. The Question Booklet Alpha Code allotted to you will be noted in your seating position in the Examination Hall. 4. If you get a Question Booklet where the alpha code does not match to the allotted alpha code in the seating position, please draw the attention of the Invigilator ImmEdIATEly. 5. The Question Booklet Serial Number is printed on the top right margin of the facing sheet. If your Question Booklet is un-numbered, please get it replaced by new Question Booklet with same A alpha code. 6. The Question Booklet will be sealed at the middle of the right margin. Candidate should not open the Question Booklet, until the indication is given to start answering. 7. Immediately after the commencement of the examination, the candidate should check that the Question Booklet supplied to him/her contains all the 100 questions in serial order. The Question Booklet does not have unprinted or torn or missing pages and if so he/she should bring it to the notice of the Invigilator and get it replaced by a complete booklet with same alpha code. This is most important. 8. A blank sheet of paper is attached to the Question Booklet. This may be used for rough work. 9. Please read carefully all the instructions on the reverse of the Answer Sheet before marking your answers. 10. Each question is provided with four choices (A), (B), (C) and (d) having one correct answer. Choose the correct answer and darken the bubble corresponding to the question number using Blue or Black Ball Point Pen in the OmR Answer Sheet. 11. each correct answer carries 1 mark and for each wrong answer 1/3 mark will be deducted. No negative mark for unattended questions. 12. No candidate will be allowed to leave the examination hall till the end of the session and without handing over his/her Answer Sheet to the Invigilator. Candidates should ensure that the Invigilator has verified all the entries in the Register Number Coding Sheet and that the Invigilator has affixed his/her signature in the space provided. 13. Strict compliance of instructions is essential. Any malpractice or attempt to commit any kind of malpractice in the Examination will result in the disqualification of the candidate. -1- 159/24 A -2-  159/24 1. Which among the following steel rule is used to be measure the depth of a key way and smaller dia holes where the ordinary steel rule cannot reach ? A) Short steel rule B) Narrow steel rule C) Hook rule d) Plain steel rule 2. Which among the following hammer is used to spread the metal in one direction ? A) Straight pein hammer B) Ball pein hammer C) Sledge hammer d) Cross pein hammer 3. According to the grade which file is used for heavy reduction of materials ? A) Rough file B) Second cut file C) Bastard file D) Smooth file 4. The accuracy of measurement by a Try square is about ________ per 10 mm length. A) 2 mm B) 0.2 mm C) 0.02 mm d) 0.002 mm 5. Which of the following statement is not true for the uses of odd leg calliper ? A) For finding centre of round rods B) For marking lines parallel to the inside edge C) For making internal measurement d) For marking lines parallel to the outside edges 6. Which punch is used to make light punching marks for position dividers ? A) Prick punch B) dot punch C) Centre punch d) Hollow punch 7. Narrow surface along the groove of the twist drill which keep the drill aligned is called A) Heel B) margin C) Body d) Flute 8. According to the Rake angles, machine Taps are classified into A) 1 B) 2 C) 3 d) 4 9. Which of the following is not to be used for cutting new threads ? A) die nut B) Button die C) Circular split die d) Adjustable screw plate die 10. Which of the following is used for removing broken Tap ? A) Tap extractor B) Use of punch C) Use of Tac welding d) All of the above A -3- 159/24 11. Which property of tool material to prevent breakage or bending of cutting tool when sudden load or impact applied ? A) Tenacity B) Hardness C) Toughness d) Brittleness 12. What is the recommended cutting speed for Turning Aluminium ? A) 70 – 100 B) 90 – 115 C) 35 – 65 d) 55 – 80 13. Which statement is correct about the term machine tool ? A) Very large size equipment B) Power driven machine to perform various metal cutting operation C) Power driven machine to reduce human labour d) None of these 14. Which mechanism is used in a spring pole lathe to rotate the workpiece ? A) By motor B) By pedal C) By clutch d) By lever 15. Which is the wrong statement about the lathe specification ? A) Height of centres from lathe bed B) length of tail stock C) length of bed d) maximum distance between centres 16. Which type of thread is provided in a four jaw chuck screw shaft ? A) Right hand acme B) Right hand BSW C) left hand BSW d) left hand square 17. Which part is ‘H’ shaped iron casting on lathe bed ways ? A) Apron B) Cross slide C) Saddle d) Compound rest 18. Which accessory is used along with the bent type carrier to transfer the drive from spindle to workpiece ? A) driving plate B) Angle plate C) Scroll plate d) Catch plate A -4-  159/24 19. To avoid over hanging problems while turning lengthy job ; which work holding method is suitable from following ? A) In between centres B) By using magnetic chuck C) By using four jaw chuck d) By using collet chuck 20. Which is the function of tumbler gear ? A) To change spindle speed B) To change direction of spindle C) To change direction of lead screw d) To transmit drive from carriage 21. The lip clearance angle of a twist drill is between A) 112° to 118° B) 12° to 18° C) 8° to 12° d) 80° to 112° 22. What is the name of machining operation ‘Beveling the end of previously drilled hole’ ? A) Boring B) Counter boring C) Spot facing d) Counter sinking 23. Which part of micrometer ensures uniform pressure between measuring faces ? A) Sleeve B) Ratchet Stop C) Spindle lock d) Thimble 24. Which part of drill is used for measuring the drill diameter ? A) margin B) Point C) Flute d) Helix 25. Which type of hand reamer used for reaming internal morse tapered holes ? A) Socket reamer B) Taper pin reamer C) Taper shank helical fluted reamer D) None of these 26. In the letter series drill, what is the diameter of letter ‘A’ drill ? A) 10.490 mm B) 5.120 mm C) 5.944 mm d) 10.262 mm 27. Which is the angle formed by cutting edges of taper and reamer axis ? A) Bevel angle B) Taper lead angle C) Cutting edge angle d) Taper clearance angle 28. Which is the suitable angle for counter sinking self tapping screws ? A) 65° B) 75° C) 70° d) 80° A -5- 159/24 29. What is the least count of commonly used metric three point internal micrometer ? A) 0.001 mm B) 0.005 mm C) 0.05 mm d) 0.0001 mm 30. What is the formula using for Turning Time Calculation ? length of cut × RPm A) B) π × diameter × RPm No. of cut × 1000 1000 Feed × RPm C) length of cut × No. of cut d) Feed × RPm diameter × length of cut 31. The name of beveled surface of the outside micrometer, in which the graduation is marked fitting ? A) Barrel B) Thimple C) Sleeve d) Vernier block 32. Which are correct statement in the case of digital micrometer ? I. The lCd displays measuring data and makes direct read out with resolution of 0.001 mm. II. lCd displays measuring data and makes direct read out with resolution of 0.005 mm. III. Measuring faces are made out of alloy steel and finished to a perfectly flat surface. IV. It’s provided with Carbide tipped measuring faces. A) I and II B) II and III C) I and IV d) I and III 33. Which are correct statement in the case of outside micrometer ? I. The circumference of the bevel edge of the thimble is graduated into 50 divisions. II. The circumference of the bevel edge of the thimble is graduated into 25 divisions. III. In metric micrometers the pitch of the spindle thread is 0.5 mm. IV. In metric micrometers the pitch of the spindle thread is 0.01 mm. A) I and II B) II and III C) III and IV d) I and III 34. The accuracy of common type Vernier Calliper which are used for measuring turning surface A) 0.02 mm B) 0.01 mm C) 0.002 mm d) 0.001 mm A -6-  159/24 35. The figure shows the reading of measurement taken by using Vernier Calliper the correct reading is what ? A) 60.88 mm B) 68.16 mm C) 60.56 mm d) 60.28 mm 36. Name this part of External micrometer. A) Spindle lock B) Barrel C) Spindle nose d) Ratchet stop 37. If set the anvil face and spindle face of External micrometer is close together, the zero mark of circular scale is above the main scale line, then the zero error of micrometer is said to be A) Positive B) Negative C) limits d) Transition 38. The figure shows the Reading, while measuring with a 50 to 75 mm micrometer, which one is correct reading ? A) 60.63 mm B) 64.26 mm C) 13.26 mm d) 64.13 mm A -7- 159/24 39. The scale graduations or divisions are marked on the beam of Vernier Calliper is known as A) Vernier scale B) main scale C) Pitch scale d) Barrel reading 40. The micrometer is a precision instrument, which is works on the principle of A) Acme thread mechanism B) Crown and spindle C) Screw and nut d) Rack and pinion 41. Which one is the example of gravity feed method in lubrication ? A) Wick feed method B) Ring oiling C) Grease cup d) Stauffer screw down method 42. Which one of the following is not the property of a good lubricant ? A) Low pour point B) High fire point C) Low flash point D) High viscosity 43. The selection of a coolant does not depend on A) The type of operation B) Surface finish required C) The type of workpiece material d) The density of coolant 44. What is the pitch of medium knurling ? A) 1.5 mm B) 1.25 mm C) 0.75 mm d) 1.75 mm 45. The device is used to hold machining outside diameter of a job with reference to their bore accurately is A) Face plate B) Catch plate C) mandrel d) Collet 46. In BIS system of limits and fits, the difference between maximum limit of size and minimum limit of size of a component is called A) lower deviation B) Allowance C) Tolerance d) Upper deviation 47. Expression 20 H7/p6 represent a type of Fit. In this letter “H” denotes A) Upper deviation of hole B) Fundamental deviation of hole C) Fundamental deviation of shaft d) Actual deviation hole A -8-  159/24 48. In a clearance fit, the difference between the minimum size of hole and maximum size of shaft is A) maximum clearance B) minimum interference C) minimum clearance d) maximum allowance 49. The device used to drive the work during turning in between centre is A) driving plate B) lathe carrier C) Face plate d) Chuck 50. Which lathe centre is used while facing the job without disturbing the setting ? A) Half centre B) Ball centre C) Swivel V centre d) Tipped centre 51. The follower rest is fixed on A) The backend of carriage B) Inner guide ways of lathe bed C) Outer guideways of lathe bed d) Over the tool post 52. The plunger type dial indicator working on principle of A) lever and scroll mechanism B) Rack and pinion mechanism C) Worm and worm wheel mechanism d) None of the above 53. The tool centre height can be adjusted in a four bolt tool post by using A) Parallel packing B) Adjusting rocker C) Set screws d) Tool post adgusting lever 54. Expression 25 H7/p6 is clearance fit from the chart, deviation for 25 H7 is – 0 and + 0.021 and for 25p6 is + 0.022 and + 0.035. What is the maximum interference of this fit ? A) – 0.001 B) + 0.056 C) – 0.035 d) – 0.014 55. Callipers along with steel rule can measure the diameter of a job to an accuracy of A) 1 mm B) 0.5 mm C) 0.1 mm d) 0.005 mm 56. metric tapers are expressed in which unit ? A) Number B) Ratio C) degree d) Taper parameter 57. Included angle of morse taper is A) 1½° B) 1° C) 3° d) 3½° A -9- 159/24 58. Which letter is indicated conicity of taper ? A) T B) A C) K d) C 59. In assembled parts which one provides self alignment ? A) Split pin B) Bolt and nut C) Taper d) Rivet 60. Tapers can be expressed by A) Small dia and length B) Big dia, small dia, length C) Big dia, length d) Small dia, big dia 61. The ratio between the opposite side to the adjacent side of a right angled triangle is A) tan value B) sine value C) cos value d) cot value 62. What is the taper angle of metric taper ? A) 1° 30' B) 1° 29' 29'' C) 3° d) 2° 51' 51" 63. The diameter of taper pin is specified by A) Big diameter B) length of taper C) Big dia length d) Small diameter 64. Which formula is used to find big diameter dimension of jarno taper ? Number A) Number B) 10 8 Number C) Number d) 2 6 65. Using compound slide method which one is not produced ? A) Taper turning external B) Plain boring C) Taper thread cutting d) Taper turning internal 66. In tail stock offset method which one of the principle is followed ? A) Job held parallel to the axis and tool moves at an angle B) The job held at an angle and tool moves parallel to angle of work C) The job held at an angle and tool moves parallel to the axis d) The job held parallel to the axis and tool moves parallel to the work A -10-  159/24 67. What is the taper ratio of British standard pin taper ? A) 1 : 30 B) 1 : 20 C) 1 : 48 d) 1 : 50 68. during taper turning by off setting tail stock A) Body of tail stock off set B) Tail stock spindle off set C) Whole tail stock off set d) Tail stock base off set 69. morse standard taper is available in A) 16 Nos. B) 12 Nos. C) 10 Nos. d) 8 Nos. 70. When using a taper turning attachment for turning taper, the formula used for calculating the setting angle is d−d d−d A) Tanφ = B) Tanφ = 2l l 2l 2 C) Tanφ = d) Tanφ = d−d d−d 71. Which of the following statement is false ? A) Threads are used for transmission of motion B) Pitch and lead of a single start thread is equal C) If the tightening force on the screw thread is applied in anti-clockwise direction the thread is said to be right hand thread D) Thread angle is the included angle between two flanks of the thread 72. What is pitch diameter of a thread ? A) The difference between minor diameter and depth of thread B) The difference between minor diameter and single depth of thread C) The difference between major diameter and depth of thread d) The difference between major diameter and single depth of thread 73. Name the type of thread whose one flank is perpendicular to the axis of the thread and the other flank is inclined. A) Acme thread B) Knuckle thread C) Buttress thread d) Worm thread A -11- 159/24 74. Which statement is true in the case of a worm thread ? A) Used in places where motion is to be transmitted between shafts at any angles B) Gives a high rate of speed reduction C) The depth and width of thread is same as acme thread d) All of the above 75. If a thread is designated as m12 × 1.5 how much will be minor diameter of the thread ? A) 10.82 mm B) 10.16 mm C) 9.84 mm d) 11.08 mm 76. What is the purpose of buttress thread ? A) Positioning of mechanical parts B) motion transmission C) Handling high axial thrust in one direction d) Used where quick motion is required 77. determine the change gears to cut a 2.5 mm pitch thread on a lathe having 5 mm pitch lead screw. A) driver 50 teeth and driven 120 teeth B) driver 50 teeth and driven 100 teeth C) driver 45 teeth and driven 80 teeth d) driver 70 teeth and driven 120 teeth 78. What is the lead of m20 × 2.5 triple start thread ? A) 2.5 B) 5 C) 7.5 d) 20 79. Which driver gear is used to cut 3 mm pitch thread on a 6 mm pitch lead screw lathe, if the driven gear have 120 teeth ? A) 60 teeth B) 80 teeth C) 90 teeth d) 100 teeth 80. Which is the most suitable instrument used to measure the minor diameter of external thread ? A) Screw thread micrometer B) Three wire method of screw thread measurement C) Thread plug gauge d) Vernier calliper A -12-  159/24 81. What is the purpose of hand chaser ? A) mass production of thread B) To follow the previously cut path during thread cutting C) To correcting and finishing a thread d) To check the thread formed during thread cutting 82. Which of the following criteria is used for the selection of interchangeable anvil of a screw thread micrometer ? A) Angle of thread B) major diameter of thread C) Root diameter of thread D) Pitch and profile of thread 83. match the table suitably. 1. Screw thread micrometer i. Bolt 2. Thread Plug gauge ii. Nut Effective diameter of 3. Thread ring gauge iii. the thread A) 1 – i, 2 – ii, 3 – iii B) 1 – i, 2 – iii, 3 – ii C) 1 – iii, 2 – ii, 3 – i d) 1 – iii, 2 – i, 3 – ii 84. Which of the following statement is false in case of thread cutting ? A) A thread chasing dial is an accessory to catch the thread quickly B) If the pitch to be cut is even number, the thread chasing dial can be engaged at any graduation on the dial C) The driver gear and the driven gear are changed according to the pitch of the thread to be cut on the job d) None of the above 85. Which of the following thread is used in railway carriage coupling ? A) Square thread B) Acme thread C) Knuckle thread d) Buttress thread 86. Which of the following statement is false in case of closed loop control system ? A) It is equipped to get feedback signal B) Encoder is responsible for the feedback system C) Encoders are placed inside the control unit d) movement of each axes are timely monitored A -13- 159/24 87. A point to point control system is suitable only for A) milling operation B) Turning operation C) Thread cutting operation d) drilling operation 88. Which G code is used for data input in mm ? A) G28 B) G20 C) G21 d) G90 89. Which of the following is used to get drives to CNC machines ? A) Sensors and Encoders B) Hydraulic system C) Axis motors d) Power distribution unit 90. Which of the following statement is True ? A) Workpiece zero point determines the workpiece coordinate system in relation to the machine zero point B) Machine zero point is a fixed point on a machine specified by the programmer C) The distance to work zero point from machine zero point will be a fixed value d) machine zero point is always lies at the centre of the spindle nose 91. What is the meaning of the given program line ? N006 G00 Z60 A) Tool retracts from the workpiece B) Plain turning operation C) Facing operation d) Chamfering operation 92. What is the meaning of W0.5 in the given program line ? G71 P10 Q20 U1.0 W0.5 F0.3 A) depth of cut per pass in X axis B) depth of cut per pass in Z axis C) Finishing Allowance in X axis d) Finishing Allowance in Z axis 93. Which of the following G code is not used for thread cutting ? A) G32 B) G75 C) G76 d) None of the above 94. What is the meaning of the given program ? G74 R4.0 ; G74 Z – 50.0 Q8000 F0.05 ; A) Step turning operation up to 50 mm length B) drilling operation C) Grooving operation with 4 mm width d) Plain turning by canned cycle A -14-  159/24 95. What is the purpose of ATC in CNC machines ? A) Only a software used to change the tool position B) Used to store the tools for different operations C) A mechanism used to change the tools automatically d) A mechanism for tool turret indexing 96. What will be the next tool location in incremental programming system ? A) Reference to the first point location B) Reference to the previous tool location C) Reference to the work zero point d) Reference to the machine zero point 97. The letter ‘P’ in the ISO designation for lathe tool holders PClNl2525m – 12 indicates A) Clamping of insert B) Holder style C) Shape of insert d) length of holder 98. Which of the following is not requires a compiler program ? A) manual part program B) APT program C) Both A) and B) d) None of the above 99. In which CNC turning operation, the tool nose radius compensation (G41 and G42) is essential ? A) Plain turning and Grooving B) Taper turning and Ball turning C) Grooving and step turning d) drilling 100. Which mechanical part is used to avoid backlash in positioning of tools in CNC machines ? A) Recirculating ball screw B) Power lead screw C) Precision feed shaft d) Needle bearing A -15- 159/24 Space for rough Work A -16-