| Post Name | TRADESMAN - TURNING - Technical Education |
|---|---|
| Question Paper Code | 027/2025 |
| Category Code | 196/2024 |
| Date of Test | 28 February 2025 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Web chisels are used for :
Answer
C. Separating metals after chain drilling
2
If the clearence angle is too large , chisel will :
Answer
B. Dig into the workpiece
3
Rasp cut file are available only in :
Answer
C. Half round shape
4
What is the name of the part marked as ‘X?
Answer
D. Snug
5
Which type of vice is used for marking of small jobs on the surface plate?
Answer
A. Tool makers vice
6
The method used to remove a broken tap from precision component without damaging
it :
Answer
D. Using spark erosion
A 3
7
The cutting edges of unequal length of drill causes :
Answer
C. Over sized drill hole
8
Recommended cutting fluids used for drilling cast iron :
Answer
B. Dry or compressed air
9
Calculate the r.p.m. for a high speed steel drill φ 22 mm to cut mild steel. The cutting
speed for MS is taken as 25 m/min :
Answer
D. 362
10
The size of the drill is determined and governed by :
Answer
A. Diameter over the lands
11
What will happen if the carriage is not being locked while facing?
Answer
B. Convex face
12
What is the name of the centre shown in fig?
Answer
D. Tipped centre
13
Which part of the lathe gives angular movement to the tool?
Answer
C. Compound slide
14
Which part of the lathe contains mechanism for the moving and controlling of the lathe
carriage ?
Answer
B. The apron
15
The crown wheel of three jaw chuck is made of :
Answer
C. Alloy steel
16
Which is the example of ferrous tool material?
Answer
A. High speed steel
17
A tumbler gear mechanism consists of :
Answer
D. 3 gears
18
The tool material which has very low heat conductivity and used without coolant is :
Answer
B. Ceramics
19
Calculate the cutting speed for turning a workpiece of φ 30 mm rotating at 450 RPM :
Answer
A. 42 m/min
20
Which type of thread cut on the screw shaft of an independent chuck?
Answer
C. Left hand square thread
21
Determine the least count when one main scale division is equal to 1 mm and one
vernier division equal to 9/10 :
Answer
B. 0.10 mm
22
On which part of micrometer the datum line and graduations are marked?
Answer
C. Barrel
23
The minimum measurement that can be correctly read with a vernier caliper is called:
Answer
A. Least count
24
The micrometer spindle will have pitch of:
Answer
D. 0.50 mm
25
Ratchet stop in the micrometer helps to:
Answer
A. Control the pressure
26
Formula to determine least count of Vernier caliper (where MSD =Main Scale Division
VSD=Vernier Scale Division):
Answer
A. 1 MSD − 1 VSD
27
The accuracy of digital vernier caliper is:
Answer
D. 0.01 mm
28
In a micrometer, the zero of the thimble rest below the datum line of the sleeve the error
is called as:
Answer
A. Positive error
29
What is the least of an outside micrometer having 50 divisions on thimble and pitch of
screw in 0.5 mm?
Answer
C. 0.01 mm
30
The spindle of an outside metric micrometer has got a fine pitch thread. What is the
relationship between the pitch of the thread and the thimble revolution?
Answer
A. One revolution of thimble = pitch of thread
31
Difference in measurement between the machined and the un-machined diameter is
known as :
Answer
C. 2 × Depth of cut
32
Which type of micrometer used to check the pitch diameter of a screw rod?
Answer
C. Screw thread micrometer
33
Which range of cutting speed is set for drilling a mild steel using HSS drill?
Answer
B. 20 – 30 m/min
34
Measuring errors which are due to the measuring instrument are known as :
Answer
Question Cancelled
35
The rate at which the drill advances into the material for each rotation of the drill is
termed as :
Answer
C. Feed
36
Which process is used for enlarging and truing an existing drilled or cored hole with a
single point tool?
Answer
A. Boring
37
Chamfering end of hole to 120° is meant for :
Answer
B. Threading
38
The Number drill is specified :
Answer
D. 1 – 80
39
Which factor decides the point angle of a drill?
Answer
C. Material to be drilled
40
It is a machining operation for producing a flat seat for bolt head, washer or nut at the
opening of a drilled hole :
Answer
B. Spot facing
41
What is Knurling?
Answer
D. Forming operation
42
Coarse knurling is done by using coarse pitched knurls of
Answer
B. 1.75 mm
43
Which is the wrong statement about properties of a good cutting fluid?
Answer
A. It should have a high evaporation rate
44
Which method is employed for the gears and bearings inside all gear drives, the lower
parts of the gears actually dipping in the oil?
Answer
C. Splash method
45
Split bushing mandrel is a example of __________ mandrel.
Answer
C. Expansion mandrel
46
Which term denotes the algebraic difference between a size, to its corresponding basic
size, It may be positive, negative or zero?
Answer
D. Deviation
47
Which is the false statement about the advantages of the limit system?
Answer
B. Necessary to employ highly skilled operators
48
In the BIS system of limits and fits, all external features of a component including those
which are not cylindrical are designated
Answer
C. Shaft
49
Which of fit is H7-p6?
Answer
B. Interference fit
50
Which accessory has elongated slots and ‘T’ slots?
Answer
A. Face plate
51
Large, flat, irregular shaped workpieces, castings, jigs and fixtures may be firmly
clamped to a __________ for various turning operations.
Answer
B. Faceplate
52
Where is follower steady can be clamped on?
Answer
D. Saddle
53
Which Fundamental deviations for fine mechanisms are added later?
Answer
A. CD, EF and FG
54
Tool setting on British type tool post requires greater skill in clamping as the adjustment
of the __________ is needed to give a grip on the full width of the tool.
Answer
D. Heel pin
55
Which Lathe centre has serrated grooves?
Answer
A. Self driving live centre
56
Which one of the following is not a method of taper turning?
Answer
B. Conical feed method
57
A taper 1:20 signifies :
Answer
Question Cancelled
58
Long work pieces with a small angle of taper are usually turned by setting over the
tailstock Centre. The angle of taper mentioned here is :
Answer
A. not exceeding 8°
59
If ‘D’ is the larger diameter of taper and ‘d’ is the smaller diameter of taper over a length
‘l’ then in taper turning conicity is designated by :
D
−d
D−d 2
Answer
D. (D − d)/l
60
If ‘D’ is the larger diameter of taper and ‘d’ is the smaller diameter of taper over a length
‘l’ then by using taper turning attachment the angle of taper ‘ α ’ can be found out by the
relation :
D−d D−d
Answer
B. tan α = (D − d)/(2l)
61
Let larger diameter ‘D’ = 90 mm and smaller diameter ‘d’ = 80 mm, and the conicity or
the amount of taper is 1:20, then the length of taper is :
Answer
A. 200 mm
62
Morse tapers are available in ____________ sizes.
Answer
C. 8
63
In British system which one of the following is not a taper system?
Answer
A. Whitworth standard taper
64
Which one of the following is not a Metric size taper?
Answer
D. 8
65
In taper turning using form tool, it is essential that the tool cutting edge should be set
accurately :
Answer
C. on the center line of the work piece
66
Which one of the following is not a size of Morse taper?
Answer
Question Cancelled
67
For long workpieces with a small angle of taper having larger diameter ‘D’ and smaller
diameter ‘d’ over a length ‘l’ and ‘L’ is the full length of work piece, then tail stock setting
over or offset[h] in British system can be determined from the formula.
L
Answer
A. h = L(D − d)/(2l)
68
Which one of the following is not an advantage of using taper turning attachment?
Answer
Question Cancelled
69
In combined feed method of taper turning :
Answer
A. the tool moves in a diagonal path
70
In metric taper sizes the amount of taper or conicity is :
Answer
B. 1:20
71
Change gear train is a train of gears serving the purpose of
(i) Connecting the fixed stud gear to the quick-change gearbox
(ii) Connecting the fixed stud gear to the tumbler gears.
(iii) Connecting the spindle gear to the lead screw
Answer
A. Only (i) is correct
72
To have a different ratio of motion between the headstock spindle and the lead screw
during thread cutting
(i) Tumbler gear mechanism is used
(ii) All geared headstock is used
(iii) Change gear train is used
Answer
C. Only (iii) is correct
73
In a simple gear train there is an idler gear between the driver gear and driven gear
(i) which does not affect the gear ratio?
(ii) which just ink the driver and the driven gears?
(iii) which serves the purpose of getting the desired direction to the driven wheel?
Answer
Question Cancelled
74
In a simple gear train the driver gear and the driven gear are changed according to:
(i) The hand of thread to be cut on the job
(ii) The lead of thread to be cut on the job
(iii) The direction of rotation of lead screw
Answer
B. Only (ii) is correct
75
Find the change gears required to cut a 3 mm pitch on a job in a lathe having a lead
screw of 6 mm pitch:
(i) Driver gear 20 teeth, driven gear 40 teeth.
(ii) Driver gear 25 teeth, driven gear 50 teeth.
(iii) Driver gear 60 teeth, driven gear 120 teeth.
Answer
D. All of the above (i), (ii) and (iii)
76
The factor/factors to be considered for the selection of a thread cutting method is :
(i) Type and number of components required.
(ii) Accuracy of thread and its surface finish.
(iii) Availability of cutting tools.
Answer
A. Only (i) and (ii) are correct
77
Helix is:
(i) a type of curve generated by a point which moves at a uniform speed parallel to the
axis.
(ii) a type of curve generated by a point which is moving at a uniform speed around the
cylinder/cone and at the same time moves at a uniform speed parallel to the axis.
(iii) a type of curve generated by a tool which is moving at a uniform speed around the
cylinder.
Answer
B. Only (ii) is correct
78
Pitch diameter is :
(i) equal to the major diameter minus one depth.
(ii) equal to the major diameter minus two depth.
(iii) equal to the minor diameter plus one depth.
Answer
C. Only (i) and (iii) are correct
79
Pitch diameter of a thread can be measured by :
(i) Three wire method
(ii) Outside micrometer
(iii) Screw thread micrometer
Answer
A. Only (i) and (iii) are correct
80
The helix angle of a thread can be calculated by the formula:
Answer
D. tan α = lead / pitch diameter
81
In a unified thread form :
Answer
C. crest and root are flat
82
The application of knuckle thread is :
Answer
D. All of the above
83
BFS thread :
(i) is similar to BSW thread
(ii) has less number of threads per inch than BSW thread for a particular thread size
(iii) has more number of threads per inch than BSW thread for a particular thread size
Answer
B. Only (i) and (iii) are correct
84
BSP thread is cut externally with a small taper for the threaded length :
(i) avoids leakage in the assembly
(ii) provides for further adjustment when slackness is felt
(iii) to suit with the internal taper thread.
Answer
B. Only (i) and (ii) are correct
85
Saw tooth thread :
(i) is a modified form of Buttress thread
(ii) in which the flank taking the load is inclined at an angle of 3°
(iii) in which the flank that does not taking the load is inclined at an angle of 30°
Answer
D. All of the above (i), (ii) and (iii)
86
CNC systems are classified as Open loop and Closed loop control system based on :
Answer
A. Feedback control
87
A series of coded information that direct the operations of the CNC machine is called :
Answer
C. Part program
88
The distance, tool moves along the work for each revolution of the work is called :
Answer
A. Feed
89
According to ISO standard, while specifying inserts, the first letter indicates :
Answer
B. Shape
90
The point at which the cutting tool is positioned is taken as datum point for calculating
the coordinate of the next point to which movement is to be made in :
Answer
A. Incremental coordinate data input system
91
The most significant factor affecting tool life when the work material, tool material and
tool shape are chosen for a machining operation is :
Answer
C. Cutting speed
92
In ISO designation system for boring bars, first character represents :
Answer
Question Cancelled
93
The tooling system for CNC are designed to :
Answer
C. Both
94
In CVD coated tipped tools, CVD stands for :
Answer
A. Chemical Vapour Deposition
95
The speed at which the cutting edge passes over the material which is expressed in
metres per minute is :
Answer
C. Cutting speed
96
The difference between machined and unmachined surface is called :
Answer
B. Depth of cut
97
The tool wear increases with :
Answer
D. Both
98
ATC in CNC machining stands for :
Answer
B. Automatic Tool Changers
99
The cutting tool lose its original shape with use and passage of time is called :
Answer
A. Tool wear
100
As compared to Open loop system, Closed loop system is :
Answer
D. Both
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