MACHINIST 3rd SEM MCQ QUESTION ANSWER
1 Which grinding machine is used for sharpening of cutters?
A Surface grinder
B Tool and Cutter grinder
C Pedestal grinder
D Cylindrical grinder
Correct Answer:- B Tool and Cutter grinder
2 Which material is used to make the base of tool and cutter grinding machine?
A Grey cast iron
B Low carbon steel
C Tool steel
D Bronze
Correct Answer:- A Grey cast iron
3 Which part mounted directly on the top of base in tool
cutter grinder?
A Column
B Saddle
C Table
D Wheel
Correct Answer:- B Saddle
4 What is marked as 'x'?
B Feeler gauge
C Pitch gauge
D Snap gauge
Correct Answer:- A Centre gauge
5 Where is tooth rest fitted in tool and cutter grinder?
A Tooth rest attachment
B In between centres
C Tail stock
D Column
Correct Answer:- A Tooth rest attachment
6 Which is the shape of grinding wheel used for sharpening milling cutter and reamer?
A Disc
B Straight cup
C Flaring cup
D Dish
Correct Answer:- C Flaring cup
7 What is the use of work holding device?
A Keep the work piece in a safe distance
B Keep the cutter in a safe distance
C Keep the work piece in position
D Keep the cutter in position
Correct Answer:- C Keep the work piece in position
8 How many number of swivelling movement is provided with universal vice?
A 2 B 3 C 4 D6
Correct Answer:- B 3
9 Which tool is used to form the radius on grinding wheel for radius grinding attachment?
A H.S.S single point tool
B Brazed single point tool
C Diamond stick
D H.C.S tool
Correct Answer:- C Diamond stick
10 What is the use of a mandrel?
A For guide the grinding wheel
B For hold the hollow cutters
C For support the wheel head
D For guide the table
Correct Answer:- B For hold the hollow cutters
11 What is the angular setting limit of an angular sine vice used in tool and cutter grinder?
A Upto 27°
B Upto 55°
C Upto 80°
D Upto 120°
Correct Answer:- B Upto 55°
12 Which attachment is used for grinding face mill up to 400mm dia?
A Universal vice
B Motor drive arrangement
C Face mill grinding attachment
D Angular sine vice
Correct Answer:- C Face mill grinding attachment
13 What is the use of radius wheel turning attachment in tool and cutter grinder?
A Dress the wheel to the required radius up to 25mm
B Turn the work piece to any required shape
C Turn the work piece to a radius up to 12mm
D Dress the wheel to any required shape
Correct Answer:- A Dress the wheel to the required radius up to 25 mm
14 Which grinding machine is used for re-sharpening of single point tools, chisel, punches and drills?
A Surface grinder
B Single purpose tool cutter grinder
C Cylindrical grinder
D Universal tool and cutter grinder
Correct Answer:- B Single purpose tool cutter grinder
15 What is the maximum swiveling angle of wheel head on a tool cutter grind machine?
A 360° B 120° C 90° D 47°
Correct Answer:- A 360°
16 Which part of the tool and cutter grinding machine on that wheel head is being mounted?
A Base
B Saddle
C Table
D Column
Correct Answer:- D Column
17 What is the remedy to remove the black and shining face of grinding wheel?
A Changing of wheel
B Truing of wheel
C Dressing of wheel
D Balancing of wheel
Correct Answer:- C Dressing of wheel
18 Why centre gauge is provided on tool and cutter grinding?
A For centering the wheel spindle and cutter edges
B For align the table to the spindle axis
C For reduce the wheel speed
D For fast metal removal
Correct Answer:- A For centering the wheel spindle and cutter edges
19 Which part is used to support each individual tooth of cutter in correct position on tool and cutter grinder?
A Compound rest
B Steady rest
C Tool rest
D Tooth rest
Correct Answer:- D Tooth rest
20 What happened if tool little clearance is provided on milling cutter?
A Chattering produced
B No heat produced
C Good surface finish
D Bad surface finish
Correct Answer:- D Bad surface finish
21 What is the recommended range of secondary clearance angle on milling cutter?
A 1° to 3° B 4° to 7° C 8° to 12° D 15° to 25°
Correct Answer:- D 15° to 25°
22 What is the recommended range of clearance angle for H.S.S cutter while milling cast iron?
A 28° to 37° B 15° to 25° C 4° to 7° D 1° to 5°
Correct Answer:- C 4° to 7°
23 Which work holding device is used on tool and cutter grinder for grinding the periphery and bevelled edges on it?
A Face mill grinding attachment
B Taper turning attachment
C Slotting attachment
D Grinding attachment
Correct Answer:- A Face mill grinding attachment
24 Which attachment is designed for holding work to any desired compound angle?
A Universal vice
B Angular sine vice
C Positive indexing attachment
D Motor drive arrangement
Correct Answer:- A Universal vice
25 Which grinding attachment is specially designed for enable the work up to a length of 750 mm?
A RH and LH extension tail stock
B Universal vice
C Positive indexing attachment
D Tap relieving sharpening attachment
Correct Answer:- A RH and LH extension tail stock
26 Which attachment is designed for grinding the land of a tap?
A Radius wheel turning attachment
B Angular sine vice
C Tap relieving and Sharpening attachment
D Milling attachment
Correct Answer:- C Tap relieving and Sharpening attachment
27 Which attachment is used for precision grinding of angular parts?
A Motor drive attachment
B Positive indexing attachment
C Universal vice
D Angular sine vice
Correct Answer:- D Angular sine vice
28 Which letter used for represent for datum for indicating geometrical tolerance?
A G B M C B D A
Correct Answer:- D A
28 What is the definition of "GD and T'?
A Geometrical Deviations and Tolerances
B Geometrical Dimensioning and Tolerances
C Geometrical Drawing and Techniques
D Geometrical Drawing and Tolerances
Correct Answer:- B Geometrical Dimensioning and Tolerances
29 What is the symbol used for to check the flatness?
A 
B 
C 
D 
Correct Answer:- D
30 What is the accuracy of depth micrometer?
A 0.5 mm B 0.001 mm C 0.01 mm D 0.05 mm
Correct Answer:- C 0.01 mm
31 Which work holding device is used for profile milling of cam?
A Swivel base vice
B Circular table
C Bolt and Nuts
D Fitting vice
Correct Answer:- B Circular table
32 What is the pitch of spindle screw in depth micrometer?
A 0.5 mm
B 0.001 mm
C 0.01 mm
D 0.05 mm
Correct Answer:- A 0.5 mm
33 Which type of micrometer does not require zero error correction?
A Tube micrometer
B Ball micrometer
C Stick micrometer
D Digital micrometer
Correct Answer:- D Digital micrometer
34 What is pitch of M12 tap?
A 1.50 mm
B 1.75 mm
C 1.25 mm
D 1.00 mm
Correct Answer:- B 1.75 mm
35 What is used to measure different holes accurately with bore dial gauge?
A Graduations on the dial
B Inter changeable measuring rods
C Sliding plunger
D Centering shoes
Correct Answer:- A Graduations on the dial
36 What is the part marked as 'X'?
A Avil
46 What is the height of tooth in spur gear?
A Addendum
B Deddendum
C 2 x Addendum
D Addendum + Deddendum
Correct Answer:- D Addendum + Deddendum
47 What is marked as 'X'?
A Fillet
B Pitch circle
C Addendum circle
D Pitch radius
Correct Answer:- A Fillet
48 Which type of group the squarness comes under in geometrical tolerance?
A Location
B Form
C Datum line
D Attitude
Correct Answer:- D Attitude
49 How to identify and indicate the geometrical tolerance?
A Numbers
B Alphabets
C Decimals
D Symbols
Correct Answer:- D Symbols
50 What is the use of depth micrometer?
A Check the width of slots
B Check the depth of blind holes
C Check the dia of holes
D Check the diameter of thin rods
Correct Answer:- B Check the depth of blind holes
51 Which mechanism used to rotate the circular table?
A Rack and Pinion mechanism
B Bevel gear mechanism
C Pawl and Ratchet mechanism
D Worm and Worm wheel mechanism
Correct Answer:- D Worm and Worm wheel mechanism
52 What is the uses of screw thread micrometer?
A Measure major diameter
B Measure pitch diameter
C Measure minor diameter
D Measure thickness of threads
Correct Answer:- B Measure pitch diameter
53 Which type of micrometer designed to measurement of longer internal length?
A External micrometer
B Outside micrometer
C Inside micrometer
D Stick micrometer
Correct Answer:- D Stick micrometer
54 How to set the zero before taking the measurement in micrometer?
A Use micrometer
B Use vernier micrometer
C Setting rings and Slip gauge
D Angle gauges
Correct Answer:- C Setting rings and Slip gauge
55 How many sets available in telescopic gauge?
A 8 B 10 C 6 D 5
Correct Answer:- C 6
56 What are the sizes available in telescopic gauges as per mitutyo series 155?
A 12 mm to 130 mm
B 20 mm to 175 mm
C 5 mm to 120 mm
D 8 mm to 150 mm
Correct Answer:- D 8 mm to 150 mm
57 What is the range of sizes in feeler gauges as per IS: 3179?
A 0.001 to 0.05 mm
B 0.01 to 0.3 mm
C 0.03 to 1.00 mm
D 0.02 to 0.75 mm
Correct Answer:- C 0.03 to 1.00 mm
58 How much tolerance is maintained to make gauges comparing job tolerance?
A One - Tenth
B One - Fifth
C One - Hundredth
D One - Eight
Correct Answer:- A One - Tenth
59 How much depth cut is applied to finish cut in slot milling?
A 0.4 to 0.5 mm
B 0.6 to 0.8 mm
C 0.5 to 1.0 mm
D 0.5 to 0.75 mm
Correct Answer:- A 0.4 to 0.5 mm
60 How can you check the width of keyways?
A Depth micrometer
B Vernier caliper inner jaw
C Out side micrometer
D Bore dial gauge
Correct Answer:- B Vernier caliper inner jaw
61 What types of gear is are in automotive differential gear boxes?
A Worm and Worm gear
B Rack and Pinion gear
C Hypoid gear
D Angular gear
Correct Answer:- C Hypoid gear
62 Which mechanism is used to convert rotary motion into reciprocating motion?
A Worm and Worm gear
B Helical gear set
C Bevel gear and Hypoid gear
D Rack and Pinion
Correct Answer:- D Rack and Pinion
63 How the pitch of a rack is specified?
A In addendum
B In depth
C In linear
D In module
Correct Answer:- C In linear
64 Where is rack milling attachment fixed on a milling machine?
A Between the knee and Elevation screw
B the face of the column and Arbor support
C Between the saddle and Knee
D Between the column and Knee
Correct Answer:- B the face of the column and Arbor support
65 Which part has the movable jaw of gear tooth vernier caliper?
A Vertical sliding head
B Horizontal sliding
C Fine adjustment head
D Vertical slide blade
Correct Answer:- B Horizontal sliding
66 Which instrument is very similar to the principle of a veriner caliper?
A Micrometer
B Bevel protractor
C Gear tooth vernier caliper
D Steel rule
Correct Answer:- C Gear tooth vernier caliper
67 What is the addendum of gear teeth?
A Distance between outside circle to pitch circle
B Distance between outside circle to root circle
C Distance between pitch circle to root circle
D Distance between outside to bottom point of gear
Correct Answer:- A Distance between outside circle to pitch circle
68 What is the least count of gear tooth vernier caliper?
A 0.01 mm B 0.01 mm C 0.2 mm D 0.02 mm
Correct Answer:- D 0.02 mm
69 Which instrument is used to check the chordal addendum of a gear teeth?
A Screw gauge
B Vernier caliper
C Gear tooth vernier caliper
D Feelar gauge
Correct Answer:- C Gear tooth vernier caliper
70 What is the use of sector arm on dividing head?
A Lock the index crank in position
B Eliminate counting holes each time
C Fix the index plate on its correct location
D Avoid the back lash of worm and Worm wheel
Correct Answer:- B Eliminate counting holes each time
71 How many turns of index crank is required for one complete turn of index
head spindle?
A 20 B 28 C 40 D 46
Correct Answer:- C 40
72 Where the index crank is fixed on index head?
A Sector arm
B Index plate
C Worm shaft
D Worm gear
Correct Answer:- C Worm shaft
73 What kind of material is used to produce a template?
A Good quality iron tube
B Good quality round rod
C Good quality copper sheet
D Good quality steel sheet
Correct Answer:- D Good quality steel sheet
74 What is the use of template?
A Checking the contour of component
B Checking the length of component
C Checking the weight of component
D Checking the width of component
Correct Answer:- A Checking the contour of component
75 What is the use of radius gauge?
A For check internal and external radius of job
B For check the gap between two sliding surfaces
C For identify the accuracy of joining parts
D For measure the diameter of jobs
Correct Answer:- A For check internal and external radius of job
76 How a vertical milling machine can be identified?
A According to the axis of table movement
B According to the axis of knee movement
C According to the axis of spindle rotation
D According to the posistion of column
Correct Answer:- C According to the axis of spindle rotation
77 Which type of machine is used to produce a T-slot in machine tools table?
A Lathe
B Horizontal milling
C Verical milling
D Drilling machine
Correct Answer:- C Verical milling
78 Which part of vertical milling that can be used for lift the knee?
A Vertical head
B Table lead screw
C Elevating screw
D Front brace
Correct Answer:- C Elevating screw
79 Which machine used for boring, key way cutting and profile milling can be done?
A Lathe machine
B Shaping machine
C Verical milling machine
D Horizontal milling machine
correct Answer:- C Verical milling machine
80 How angular boring is done using a vertical milling machine?
A Swivelling the machine vice
B Swivelling the table
C Swivelling the spindle head
D Swivelling the column
Correct Answer:- C Swivelling the spindle head
81 What type of cutter holding device is generally used on vertical miling machine?
A Collet chuck
D Long arbor
C Clapper block
D Taper sleeve
Correct Answer:- A Collet chuck
82 Which type of machine is generally used for wood ruff key way cutting?
A Shaper
B Slotter
C Vertical milling
D Horizontal milling
Correct Answer:- C Vertical milling
83 Which machine is provided with the over arm support for reduce chattering?
A Vertical milling machine
B Shaping machine
C Horizontal mlling machine
D Slotting machine
Correct Answer:- B Shaping machine
84 Which formula is used to find out thelinear pitch of a rack?
A (A-Z)40 B π m C 40/z D π m/2
Correct Answer:- B π m
85 How length of rack is calculated?
A Linear pitch x Number of teeth
B Module x Number of teeth
C 2.25 x module
D π x Module
Correct Answer:- A Linear pitch x Number of teeth
86 Which formula is used to calculate chrodal addendum of a gear tooth?
A π m
B mZ
C mZ sin (90/z)
D (Z + 2) M
Correct Answer:- C mZ sin (90/z)
87 Which part of a gear tooth vernier caliper is used to set the addendum height?
A Vertical slide with blade
B Horizontal slide with movable jaw
C Verical slide and fixed jaw
D Graduated vertical beam and fixed jaw
Correct Answer:- A Vertical slide with blade
88 How to find the out side diameter of a spur gear having number of teeth is 'Z' and module 'm'?
A OD = Z\M
B OD (Z 2)\M
C OD = (Z - 2)m
D OD = (Z + 2)m
Correct Answer:- D OD = (Z + 2)m
89 What formula is applied for calculate the pitch diameter of a spur gear tooth?
A Z x m
B (Z + 2) m
C Z x m/2
D 7/6 x m
Correct Answer:- A Z x m
90 How many hole circle is suitable for indexing 48 division in index plate?
A 18 B 20 C 23 D 29
Correct Answer:- A 18
91 Which formula is used to find the gear ratio for differential indexing?
A ( N x 40) x A
B (A x N)x 40/A
C 2 A x 40/A
D (A - N) x 40A
Correct Answer:- B (A x N)x 40/A
92 How any degree is possible to swive on the vertical head of a vertical milling?
A 15° B 25° C 35° D 45°
Correct Answer:- D 45°
93 Which feed is given while sliding the column in vertical milling?
A Circular feed
B Cross feed
C Longitudinal feed
D Vertical feed
Correct Answer:- D Vertical feed
94 Which machine the spindle can be moved up an down?
A Vertical milling machine
B Horizontal milling machine
C Lathe machine
D Shaping machine
Correct Answer:- A Vertical milling machine
95 Why micro cartridges are used on boring bar in vertical milling machine?
A Final adjustment of tool
B Useful for fast roughing of bore
C Useful for large hole drilling
D Useful for step boring easily
Correct Answer:- A Final adjustment of tool
96 Why the over arm is provided on horizontal milling machine?
A It reduce the vibration of table while milling
B It support the other end of arbor
C It guide the top end of elevating screw
D It support the knee
Correct Answer:- B It support the other end of arbor
97 Which type of cutter holding device is generally used on horizontal milling machine?
A Long arbor
B Collet chuck
C Drill chuck
D Three jaw chuck
Correct Answer:- A Long arbor
98 How many elements must be known in cut a helix or a spiral?
A 2 B 1 C 5 D 6
Correct Answer:- A 2
99 What is the line generated by the progress and rotation of a point around a cylinder?
A Sprial B Helix C Bevel D Taper
Correct Answer:- B Helix
100 What is the maximum helix angle determined in helical gear?
A Obtue angle
B Acute angle
C Right angle
D Reflex angle
Correct Answer:- B Acute angle
101 Which trigonometric ratio is determined the helix anfge for helical gear?
A Tan θ B Sin θ C Cosec θ D Cos θ
Correct Answer:- D Cos θ
102 What is the name of cutter?
A Side and Face milling cutter
B End mill cutter
C Slab milling cutter
D Shell and Mill cutter
Correct Answer:- C Slab milling cutter
103 What is the part marked as 'X'?
A Horizontal beam
B Vertical beam
C Horizontal sliding head
D Vertical sliding head
Correct Answer:- A Horizontal beam
104 Which type of indexing is used to cut the helical gear?
A Direct indexing
B Differential indexing
C Angular indexing
D Simple indexing
Correct Answer:- B Differential indexing
105 What is the type of reamer?
A Hand reamer with pilot
B Machine reamer
C Hand reamer
D Jobber reamer
Correct Answer:- C Hand reamer
106 What is ratio of taper pin hand reamer?
A 1:50
B 1:40
C 1:30
D 1:20
Correct Answer:- A 1:50
107 What is the part marked as 'X'?
A Face
B Flute
C Heel
D Cutting edge
Correct Answer:- C Heel
108 Which type of reamer used to finish the holes for fitting taper pins on taper holes?
A Taper reamer
B Rose reamer
C Machine jig reamer
D Taper pin machine reamer
Correct Answer:- D Taper pin machine reamer
109 Which part is ensure positive drive of the drill from the drill spindle?
A Shank
B Tang
C Neck
D Point angle
Correct Answer:- B Tang
110 Where is engraved diameter and other particular of the drill?
A Shank
B Tang
C Neck
D Face
Correct Answer:- C Neck
111 Which part is held and driven the drill?
A Neck
B Tang
C Heel
D Shank
Correct Answer:- D Shank
112 What is the lip clearance angle in drill?
A 15⁰
B 12⁰
C 18⁰
D 118⁰
Correct Answer:- B 12⁰
113 Which milling machine is suitable for helical milling?
A Horizontal milling machine
B Universal milling machine
C Pantograph milling machine
D Vertical milling machine
Correct Answer:- B Universal milling machine
114 When you cut left hand helix which direction must be swivelled the table in the milling machine?
A Counter clock wise direction
B Clock wise direction
C Table filting downward position
D Table at stable condition
Correct Answer:- B Clock wise direction
115 Calculate the real module in helical gear the pitch diameter (PD) is 100 mm and number of teeth 19.
A 5.00 mm
B 0.19 mm
C 5.26 mm
D 20 mm
Correct Answer:- C 5.26 mm
116 Which type of gear is used for high speed running and heavy duty gear drives?
A Spur gear
B Helical gear
C Angular gear
D Worm and Worm gear
Correct Answer:- B Helical gear
117 Why reamers have uneven spacing of teeth?
A To be maintain the hole diameter
B To be cut excessive material
C To be cut less material
D To reduce chattering
Correct Answer:- D To reduce chattering
118 What is the name of the reamer used with several sizes of reamers in with one shank?
A Adjustable machine reamer
B Reamers with floating holders
C Shell reamer
D Chucking reamer
Correct Answer:- C Shell reamer
119 Which is the law related to the given figure?
A Ohm's law
B Krichhoff's law
C Faraday's law
D Lenz's Law
Correct Answer:- A Ohm's law
120 What is the electrical property of an electrical circuit to oppose any change in the magnitude of current flow?
A Conductivity
B Inductance
C Insulation
D Capacitance
Correct Answer:- B Inductance
121 Which machine converts electric energy into mechanical rotary motion?
A Motor
B Generator
C Transformer
D Solenoid
Correct Answer:- A Motor
122 Which component rotates in an electric generator?
A Field pole
B Brushes
C Frame
D Armature
141 What is the name of machine system?
A Convention
B Auto tool changers
C Numerical control
D Computer numerical control
Correct Answer:- B Auto tool changers
142 What is the first step to stop CNC machine of an accident happen while working?
A Switch off regulator
B Press emergency switch
C Reset machine
D Reset regulator
Correct Answer:- B Press emergency switch
143 Which motor control the axes of CNC machine?
A Air motor
B DC series motor
C Servo motor
D Hydraulic motor
Correct Answer:- C Servo motor
144 Which mechanism reduces the back lash of CNC lathe?
A Stopper
B Clutch
C Recirculating ball screw with nut
D Break
Correct Answer:- C Recirculating ball screw with nut
145 What is G04?
A Linear interpolation
B CW circular interpolation
C CCW Circular Interpolation
D Dwell time
Correct Answer:- D Dwell time
146 Which type of chuck is used in a CNC lathe?
A Two jaw chuck
B Three jaw chuck
C Hydraulic chuck
D Four Jaw chuck
Correct Answer:- C Hydraulic chuck
147 What is the maximum machining length in a CNC lathe?
A 320 mm B 245 mm C 200 mm D 340 mm
Correct Answer:- B 245 mm
148 What is the spindle speed range in CNC machine?
A 40-500 RAM
B 40-4000 RAM
C 10-600 RAM
D 30-1000 RAM
Correct Answer:- B 40-4000 RAM
149 What is the name part marked as ‘X’ in block diagram of CNC machine tool?
B Y- axis position transducer
C X- axis servomotor
D Y- axis servomotor
Correct Answer:- D Y- axis servomotor
150 What types of taper is in the CNC machine spindle?
A ISO 40
B Morse taper
C Jarno taper
D Pin taper
Correct Answer:- A ISO 40
151 What R denotes as per ISO designation of boring bar S32USKKR12 of CNC lathe?
A Shank type
B Clearence angle
C Tool length
D Cutting direction
Correct Answer:- D Cutting direction
152 Which describing machine tool movement in CNC?
A G-code
B M-code
C T-word
D S-word
Correct Answer:- A G-code
153 What ‘N’ of ISO insert tool specifies?
A Shape
B Grade
C Material
D Relief angle
Correct Answer:- D Relief angle
154 What is M8 represent in programs off CPU tapping?
A Coolant off
B Coolant on
C Specific direction
D Tapping RH threads
Correct Answer:- B Coolant on
155 Which code represents in more flexible and suitable for threading longitudinal transverse and tapered thread?
A G 76 B G 92 C G 32 D G 34
Correct Answer:- G 34
156 Which preparatory code should be selected for taper threading cycle?
A G 32 B G 92 C G 76 D G 33
Correct Answer:- C G 76
157 Which G-code is used for tapping left hand thread with thread M4 in CNC program?
A G 74 B G 84 C G 28 D G 9
Correct Answer:- B G 84
158 What is the composition of stellite tool material?
A Cobalt, Chromium and Tungsten
B Cobalt, Nikel and Tungsten
C Cobalt, Chromium and Nikel
D Cobalt, Carbon and Tungsten
Correct Answer:- A Cobalt, Chromium and Tungsten
159 Which is the tool selection word is specified?
A G-Allowed by 5 digit numbers
B F-Allowed by 5 digit numbers
C S-Allowed by 5 digit numbers
D T-Allowed by 5 digit numbers
Correct Answer:- D T-Allowed by 5 digit numbers
160 What is the expansion of CAD?
A Computer Aided Development
B Computer Aided Design
C Computer Automatic Development
D Computer Automatic Design
Correct Answer:- B Computer Aided Design
161 Which is the disadvantage of NC system?
A Accuracy cannot be a change
B Increase compound rejection
C Skilled operator involves
D If tape is spoiled, entire program is affected
Correct Answer:- D If tape is spoiled, entire program is affected
162 Which guide way separate the surface contact between the sliding parts by a thin layer of fluid?
A Flat guide way
B Vee guide way
C Hydrostatic guide way
D Dovetail guide way
Correct Answer:- C Hydrostatic guide way
163 When the machine moves 25.49 mm for the commond X = 25.50 mm, what must be the positional accuracy?
A 0.001 mm B 0.01 mm C 0.1 mm D 1 mm
Correct Answer:- B 0.01 mm
164 What should be the safety precaution for holding the work piece to the lathe chuck?
A Cleaned
B Measured
C Clamped securly
D Polished
Correct Answer:- C Clamped securly
165 Which part provides linear travel to the tool in CNC lathe?
A Lead screw
B Ball screw
C Warm wheel
D Rack and Pinion
Correct Answer:- B Ball screw
166 Which axis the fore finger indicates in right hand thumb rule?
A Y axis B X axis C Z Axis D A axis
Correct Answer:- B X axis
167 What is the control system of the CNC machine?
B 2-D Contouring control
C 3-D Contouring control
D 2½ D Contouring control
Correct Answer:- B 2-D Contouring control
168 Which quadrant in cartesian co-ordinate will have positive value both in X and Y?
A Fourth
B Second
C Third
D First
Correct Answer:- D First
169 Which G-code description maximum spindle speed setting?
A G50 B G71 C G72 D G42
Correct Answer:- A G50
170 What is the function of M02 code in part programming?
A Programme stop
B Optional stop
C End of programme execution
D Coolant ON
Correct Answer:- C End of programme execution
171 What is the function of M02 code in part programming?
A Programme stop
B Optional stop
C End of programme execution
D Coolant ON
Correct Answer:- C End of programme execution
172 Which code is used for peck drilling in FANUC controller system?
A G 80 B G 76 C G 72 D G 74
Correct Answer:- D G 74
173 Which G code describe machine tool movement of grooving cycle?
A G 73 B G 75 C G 92 B G 98
Correct Answer:- B G 75
174 What is the function of G 32 code?
A Rapid traverse
B Liner inter potation
C Thread cutting
D Circulation inter polation
Correct Answer:- C Thread cutting
175 What is the role of G-wards in part programming function?
A Preparatory function
B Sequence of operation by the tool
C Indicate position of tool motion
D Specify the cutting speed process
Correct Answer:- A Preparatory function
176 Which is the programme for depth of cut of 2-5 mm is given?
A N003 M0 8 G 01X -2.5
B N004 G 01 Z -2.5
C N004 G 01 Z -2.5
D N007 G 00 X + 5
Correct Answer:- A N003 M0 8 G 01X -2.5
177 Which is the part programme to limit the RPM to 3000?
A G 92 S 3000
B G 96 N 3000
C G 00 T 3000
D G 01 S 250
Correct Answer:- A G 92 S 3000
178 Which common word address used to miscellaneous function in CNC lathe?
A N B G C S D M
Correct Answer:- D M
179 Which M-code is defined and implement to spindles stop?
A M05 B M08 C M11 D M14
Correct Answer:- A M05
180 What is the code M11 defined by the machine tool?
A Coolant OFF
B Coolant ON
C Chuck close
D Door close
Correct Answer:- C Chuck close
181 Which code describe the auxiliary function of CNC machine?
A N- words
B M- words
C G- words
D T- words
Correct Answer:- B M- words
182 Which is the programme for simple turning operation for the length of -30 mm?
A N 008 G 01 Y -2.5
B N 011 G 00 X 020
C N 009 G 01 Z -30 N
D 010 G 01 X 5 Z - 30
Correct Answer:- C N 009 G 01 Z -30 N
183 Which is the method in avoidance of collisions due to programme?
A Full cycle simulation
B Reduce motor speed
C Give less feed
D Reduce cutter speed
Correct Answer:- A Full cycle simulation
184 What is the feed of CNC machine XYZ axis?
A 1 to 2 mm/min
B 5 to 50 mm/min
C 1 to 1000 mm/min
D 1 to 100 mm/min
Correct Answer:- C 1 to 1000 mm/min
185 How many times the cutting speed of ceramic tool is greater than H.S.S?
A 20 times
B 15 times
C 4 times
D 42 times
Correct Answer:- D 42 times
186 Which device enables crash prevention on different types of CNC machines?
A Encoder - dish position sensors
B Servo motor
C Control computer
D Comparator
Correct Answer:- A Encoder - dish position sensors
187 What is the expansion of MDI in CNC?
A Mannual Data Input
B Managing Diet Instruction
C Maintain the Data Instruction
D Machine Development in Industry
Correct Answer:- A Mannual Data Input
188 Which is axis of spindle in CNC lathe?
A X axis
B Y axis
C Z axis
D 4th axis
Correct Answer:- C Z axis
189 Which mode allows an operation to check the program by executing only one program block at a time?
A Single block mode
B MDI mode
C Edit mode
D Auto mode
Correct Answer:- A Single block mode
190 Which is the input of CNC lathe?
A Microphone
B Control panel
C Joy stick
D Mouse
Correct Answer:- B Control panel
191 What is 'F' for the given block G01 X20 Y50 F120?
A Function
B Feed back
C Feed
D Frequency
Correct Answer:- C Feed
192 Which is the control developed by siemens company?
A Usage
B Allen
C Mazatrol
D Sinumeric
Correct Answer:- D Sinumeric
193 What is the simulation process in a CNC machine?
A Planning function
B Implementing function
C Verification activity
D Correcting function
Correct Answer:- C Verification activity
194 How the simulation take place in CNC machine?
A By hardware device
B Through a software
C Through machined device
D Through electric device
Correct Answer:- B Through a software
195 Which offset is used to adjust the machined size become x 40.44mm instead of programmed size x 40.49 reduced 0.04 mm?
A Work offset
B Geometrical offset
C Wear offset
D Tool offset
Correct Answer:- C Wear offset
196 What is the explanation of program N005G01 X 5Z-30?
A Taper turning for the length of 30 mm
B Tool returns out to its initial position
C Tool is moving towards left by 30 mm
D Against, infeed of 5 mm in given
Correct Answer:- A Taper turning for the length of 30 mm
197 Which traverse 'X' 60 mm as per technical specification of CNC machine?
A Saddle movement
B Head movement
C Column movement
D Turret movement
Correct Answer:- A Saddle movement
198 What is the mode to check the effectiveness of the program?
A Dry run
B Jog mode
C Edit mode
D Single block mode
Correct Answer:- A Dry run
199 Which is the start of program in address / numeric key?
A B C D
Correct Answer:- A
200 What is the symbol identity?
A Spindle stop / Start
B Feed stop / Start
C Single block
D Direction keys
Correct Answer:- A Spindle stop / Start
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