| Post Name | JUNIOR INSTRUCTOR (TURNER) - Industrial Training Department |
|---|---|
| Question Paper Code | 159/2024 |
| Category Code | 661/2023 |
| Date of Test | 14 November 2024 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
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 ?
Answer
B. Narrow steel rule
2
Which among the following hammer is used to spread the metal in one direction ?
Answer
D. Cross pein hammer
3
According to the grade which file is used for heavy reduction of materials ?
Answer
C. Bastard file
4
The accuracy of measurement by a Try square is about ________ per 10 mm
length.
Answer
D. 0.002 mm
5
Which of the following statement is not true for the uses of odd leg calliper ?
Answer
C. For making internal measurement
6
Which punch is used to make light punching marks for position dividers ?
Answer
A. Prick punch
7
Narrow surface along the groove of the twist drill which keep the drill aligned is
called
Answer
B. margin
8
According to the Rake angles, machine Taps are classified into
Answer
C. 3
9
Which of the following is not to be used for cutting new threads ?
Answer
A. die nut
10
Which of the following is used for removing broken Tap ?
Answer
D. All of the above
11
Which property of tool material to prevent breakage or bending of cutting tool when
sudden load or impact applied ?
Answer
C. Toughness
12
What is the recommended cutting speed for Turning Aluminium ?
Answer
A. 70 β 100
13
Which statement is correct about the term machine tool ?
Answer
B. Power driven machine to perform various metal cutting operation
14
Which mechanism is used in a spring pole lathe to rotate the workpiece ?
Answer
B. By pedal
15
Which is the wrong statement about the lathe specification ?
Answer
B. length of tail stock
16
Which type of thread is provided in a four jaw chuck screw shaft ?
Answer
D. left hand square
17
Which part is βHβ shaped iron casting on lathe bed ways ?
Answer
C. Saddle
18
Which accessory is used along with the bent type carrier to transfer the drive from
spindle to workpiece ?
Answer
D. Catch plate
19
To avoid over hanging problems while turning lengthy job ; which work holding method
is suitable from following ?
Answer
A. In between centres
20
Which is the function of tumbler gear ?
Answer
C. To change direction of lead screw
21
The lip clearance angle of a twist drill is between
Answer
C. 8Β° to 12Β°
22
What is the name of machining operation βBeveling the end of previously drilled holeβ ?
Answer
D. Counter sinking
23
Which part of micrometer ensures uniform pressure between measuring faces ?
Answer
B. Ratchet Stop
24
Which part of drill is used for measuring the drill diameter ?
Answer
A. margin
25
Which type of hand reamer used for reaming internal morse tapered holes ?
Answer
A. Socket reamer
26
In the letter series drill, what is the diameter of letter βAβ drill ?
Answer
C. 5.944 mm
27
Which is the angle formed by cutting edges of taper and reamer axis ?
Answer
B. Taper lead angle
28
Which is the suitable angle for counter sinking self tapping screws ?
Answer
D. 80Β°
29
What is the least count of commonly used metric three point internal micrometer ?
Answer
B. 0.005 mm
30
What is the formula using for Turning Time Calculation ?
length of cut Γ RPm
Answer
C. length of cut Γ No. of cut
31
The name of beveled surface of the outside micrometer, in which the graduation is
marked fitting ?
Answer
B. Thimple
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. Itβs provided with Carbide tipped measuring faces.
Answer
C. I and IV
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.
Answer
D. I and III
34
The accuracy of common type Vernier Calliper which are used for measuring turning
surface
Answer
A. 0.02 mm
35
The figure shows the reading of measurement taken by using Vernier Calliper the
correct reading is what ?
Answer
C. 60.56 mm
36
Name this part of External micrometer.
Answer
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
Answer
B. Negative
38
The figure shows the Reading, while measuring with a 50 to 75 mm micrometer,
which one is correct reading ?
Answer
Question Cancelled
39
The scale graduations or divisions are marked on the beam of Vernier Calliper is
known as
Answer
B. main scale
40
The micrometer is a precision instrument, which is works on the principle of
Answer
C. Screw and nut
41
Which one is the example of gravity feed method in lubrication ?
Answer
A. Wick feed method
42
Which one of the following is not the property of a good lubricant ?
Answer
C. Low flash point
43
The selection of a coolant does not depend on
Answer
D. The density of coolant
44
What is the pitch of medium knurling ?
Answer
B. 1.25 mm
45
The device is used to hold machining outside diameter of a job with reference to their
bore accurately is
Answer
C. mandrel
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
Answer
C. Tolerance
47
Expression 20 H7/p6 represent a type of Fit. In this letter βHβ denotes
Answer
B. Fundamental deviation of hole
48
In a clearance fit, the difference between the minimum size of hole and maximum
size of shaft is
Answer
C. minimum clearance
49
The device used to drive the work during turning in between centre is
Answer
B. lathe carrier
50
Which lathe centre is used while facing the job without disturbing the setting ?
Answer
A. Half centre
51
The follower rest is fixed on
Answer
A. The backend of carriage
52
The plunger type dial indicator working on principle of
Answer
B. Rack and pinion mechanism
53
The tool centre height can be adjusted in a four bolt tool post by using
Answer
A. Parallel packing
54
Expression 25 H7/p6 is clearance fit from the chart, deviation for 25 H7 is β 0 and
+ 0.021 and for 25p6 is + 0.022 and + 0.035. What is the maximum interference of
this fit ?
Answer
Question Cancelled
55
Callipers along with steel rule can measure the diameter of a job to an accuracy of
Answer
B. 0.5 mm
56
metric tapers are expressed in which unit ?
Answer
A. Number
57
Included angle of morse taper is
Answer
C. 3Β°
58
Which letter is indicated conicity of taper ?
Answer
C. K
59
In assembled parts which one provides self alignment ?
Answer
C. Taper
60
Tapers can be expressed by
Answer
B. Big dia, small dia, length
61
The ratio between the opposite side to the adjacent side of a right angled triangle is
Answer
A. tan value
62
What is the taper angle of metric taper ?
Answer
D. 2Β° 51' 51"
63
The diameter of taper pin is specified by
Answer
D. Small diameter
64
Which formula is used to find big diameter dimension of jarno taper ?
Number
Answer
B. 10 8
Number
65
Using compound slide method which one is not produced ?
Answer
C. Taper thread cutting
66
In tail stock offset method which one of the principle is followed ?
Answer
C. The job held at an angle and tool moves parallel to the axis
67
What is the taper ratio of British standard pin taper ?
Answer
C. 1 : 48
68
during taper turning by off setting tail stock
Answer
A. Body of tail stock off set
69
morse standard taper is available in
Answer
D. 8 Nos.
70
When using a taper turning attachment for turning taper, the formula used for
calculating the setting angle is
dβd dβd
Answer
A. TanΟ =
71
Which of the following statement is false ?
Answer
C. If the tightening force on the screw thread is applied in anti-clockwise direction
the thread is said to be right hand thread
72
What is pitch diameter of a thread ?
Answer
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.
Answer
C. Buttress thread
74
Which statement is true in the case of a worm thread ?
Answer
B. Gives a high rate of speed reduction
75
If a thread is designated as m12 Γ 1.5 how much will be minor diameter of the thread ?
Answer
B. 10.16 mm
76
What is the purpose of buttress thread ?
Answer
C. Handling high axial thrust in one direction
77
determine the change gears to cut a 2.5 mm pitch thread on a lathe having 5 mm
pitch lead screw.
Answer
B. driver 50 teeth and driven 100 teeth
78
What is the lead of m20 Γ 2.5 triple start thread ?
Answer
C. 7.5
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 ?
Answer
A. 60 teeth
80
Which is the most suitable instrument used to measure the minor diameter of external
thread ?
Answer
D. Vernier calliper
81
What is the purpose of hand chaser ?
Answer
C. To correcting and finishing a thread
82
Which of the following criteria is used for the selection of interchangeable anvil of a
screw thread micrometer ?
Answer
D. Pitch and profile of thread
83
Match the table suitably.
Screw thread micrometer i.
Answer
C. 1-iii, 2-ii, 3-i
84
Which of the following statement is false in case of thread cutting ?
Answer
D. None of the above
85
Which of the following thread is used in railway carriage coupling ?
Answer
C. Knuckle thread
86
Which of the following statement is false in case of closed loop control system ?
Answer
C. Encoders are placed inside the control unit
87
A point to point control system is suitable only for
Answer
D. drilling operation
88
Which G code is used for data input in mm ?
Answer
C. G21
89
Which of the following is used to get drives to CNC machines ?
Answer
C. Axis motors
90
Which of the following statement is True ?
Answer
A. Workpiece zero point determines the workpiece coordinate system in relation to
the machine zero point
91
What is the meaning of the given program line ?
N006 G00 Z60
Answer
A. Tool retracts from the workpiece
92
What is the meaning of W0.5 in the given program line ?
G71 P10 Q20 U1.0 W0.5 F0.3
Answer
D. Finishing Allowance in Z axis
93
Which of the following G code is not used for thread cutting ?
Answer
B. G75
94
What is the meaning of the given program ?
G74 R4.0 ;
G74 Z β 50.0 Q8000 F0.05 ;
Answer
B. drilling operation
95
What is the purpose of ATC in CNC machines ?
Answer
C. A mechanism used to change the tools automatically
96
What will be the next tool location in incremental programming system ?
Answer
B. Reference to the previous tool location
97
The letter βPβ in the ISO designation for lathe tool holders PClNl2525m β 12
indicates
Answer
A. Clamping of insert
98
Which of the following is not requires a compiler program ?
Answer
A. manual part program
99
In which CNC turning operation, the tool nose radius compensation (G41 and G42)
is essential ?
Answer
B. Taper turning and Ball turning
100
Which mechanical part is used to avoid backlash in positioning of tools in CNC
machines ?
Answer
A. Recirculating ball screw
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