| Post Name | Tradesman (Welding) |
|---|---|
| Department | Technical Education |
| Question Paper Code | 111/2022 |
| Category Code | 759/2021 |
| Date of Test | 9 November 2022 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
The standard length of the commonly used hacksaw blade is :
Answer
D. 250 mm
2
To what angle the center punch is ground?
Answer
D. 90°
3
The accuracy of measurement with a steel rule is :
Answer
B. 0.5 mm
4
For gas cutting of a 8 mm thick plate, how much should be the cutting oxygen pressure?
Answer
B. 1.4 kg/cm2
5
While gas cutting, the nozzle should be :
Answer
C. 5 mm away from work
6
What type of flame do you set to weld gray cast iron?
Answer
A. Neutral Flame
7
Oxygen gas will change into liquid condition at :
Answer
B. –182.9 °C
8
Which oxy-acetylene flame has an excess of fuel gas?
Answer
C. Carburizing
9
Why an oxidizing flame is most suitable to weld brass and bronze?
Answer
C. It avoids evaporation of zinc
10
What is the preheating temperature of cast iron welding?
Answer
D. 200°C to 310°C
11
1 kg of calcium carbide generate –––––––––– liter of acetylene gas :
Answer
C. 375 liter
12
What is the storage medium used to store acetylene gas in the cylinder at high pressure?
Answer
B. Acetone
13
Which one of the following gases is supporter of combustion?
Answer
A. Oxygen
14
Which stage of regulator is needed for frequent torch adjustment?
Answer
A. Single stage
15
Which type of blow pipe can be used in both low pressure and high pressure?
Answer
B. Low pressure blow pipe
16
In gas welding the angle of torch to the work in rightward welding technique is :
Answer
B. 40° – 50°
17
Which one is a fusion welding?
Answer
D. Gas welding
18
Which gas flame combination is suitable to weld both ferrous and non-ferrous metals?
Answer
A. Oxy Acetylene
19
The chief alloying elements of stainless steel are :
Answer
A. Chromium and Nickel
20
The divergence allowance required for gas welding a 300 mm long copper butt joint is :
Answer
B. 3 mm to 4 mm
21
One of the advantages of the submerged arc welding process is :
Answer
A. high deposition rate and speed
22
The current set to weld a 8 mm thick M-S butt joint using a 4 mm size electrode by
submerged arc welding process is :
Answer
Question Cancelled
23
Which one of the position used for electroslag welding?
Answer
C. Vertical
24
The reel of the submerged arc welding electrode is available upto the diameter of :
Answer
C. 2 to 8 mm
25
In the electroslag welding find the temperature of inside under the surface?
Answer
C. 1930°C
26
The reaction which takes place in thermit welding is :
Answer
A. Exothermic
27
What is the temperature of thermit welding?
Answer
C. 2760°C
28
In friction welding, the metal at the interface when joining occurs, is in :
Answer
B. Plastic State
29
Which welding process is performed in a vacuum without a shielding gas?
Answer
C. Electron beam welding
30
By which process good penetration will occur while welding titanium?
Answer
B. Electron beam welding
31
What is the shape of seam welding electrode?
Answer
C. Roller
32
During the resistance welding, heat produced is proportional to :
Answer
B. Current
33
Which statement is used for submerged arc welding?
Answer
C. Bare wire electrode is used
34
Which operating variable in submerged arc welding controls the arc length?
Answer
B. Welding voltage
35
Flux used in submerged arc welding is in the form of :
Answer
C. Granular
36
The sensitivity of a radiograph is assessed :
Answer
B. by using an image quality indicator (IQI)
37
Which destructive test preparation the weld bead cutting by saw of 1.5 mm to 2 mm depth?
Answer
A. Nick break test
38
In which test the welded joint is subjected to push and pull forces alternatively for a long
period until the joint fails?
Answer
B. Fatigue test
39
The ductility of weld metal is measured by the :
Answer
B. Bend test
40
What is the full form of WPS in welding?
Answer
Question Cancelled
41
Which process is used to cut stainless steel metal?
Answer
A. Plasma arc cutting process
42
Which is the operation to relieve residual stresses from the welding point?
Answer
D. Postheating
43
Which method is suitable for surfacing the metal part and for high quality of weld and high
deposition rate?
Answer
D. SAW
44
What is the purpose of metal build up on the worn out metal parts?
Answer
C. To make them good as new and obtain require properties
45
Which electrode is used in plasma arc welding?
Answer
C. Tungsten
46
Which type of transformer is used in arc welding?
Answer
B. Step down
47
Welding transformers are equipped with condensers to improve :
Answer
D. Power factor
48
What is defined as the vertical position of groove welding?
Answer
C. 3G
49
Which of the accessories should be worn during overhead welding?
Answer
A. Helmet
50
Which type of polarity is used in aluminium welding?
Answer
C. Reverse polarity
51
Which type of electrode produces a short arc length?
Answer
A. Heavy coated electrodes
52
What is the conversion function of a rectifier?
Answer
C. AC to DC
53
Which is used for arc welding if there is no electric power supply?
Answer
D. Engine generator set
54
Which type of arc produces a humming sound?
Answer
A. Long arc length
55
The amount of time during which the transformer will be used for welding under normal
loading conditions is known as :
Answer
D. Duty cycle
56
What is the purpose of fixing run-on, run-off plates in arc welding?
Answer
A. Control arc blow
57
What happens if the root gap is lesser than one-sixth of plate thickness?
Answer
D. Base metal not fused till the bottom of joint
58
What is the indication of the wrong polarity in DC welding?
Answer
C. Excess spatters and poor penetration
59
Which metal in the welding process is subjected to the “Weld decay” defect?
Answer
D. Stainless steel
60
What does the third digit of AWS codification in EB 5426 HJX represent?
Answer
D. Type of welding position
61
What is the cause of hairline separation in the bead in arc welding?
Answer
A. Fast cooling
62
Which type of arc length produces poor penetration?
Answer
A. Long arc length
63
What procedure is to be followed for welding pipes under the 6G position?
Answer
D. Pipe not rotated and pipe axis 45° angle deposit weld flat, vertical
64
What is the effect of expansion and contraction due to heat in welding?
Answer
C. Distortion
65
What is the welding defect in base metal gets melted and a groove formed along the toe of the
weld?
Answer
A. Undercut
66
What type of lens shade is to be fixed in the helmet while doing MIG welding?
Answer
Question Cancelled
67
Which shielding gas is used in MIG welding?
Answer
A. Argon
68
How many types of metal transfer in GMAW/CO2 welding process?
Answer
D. Four
69
Which is an important link between the power source and the welding gun in MIG welding?
Answer
A. Wire feed unit
70
What is the usual torch angle tilt on either side of vertical in GMAW?
Answer
A. 10° – 20°
71
What is the solution if burn back occurs due to irregular wire feeding in the GMAW process?
Answer
C. Cut the kink wire and replace spool
72
Which type of core wire is suitable for welding carbon steel, alloy steel, and stainless steel
under FCAW?
Answer
A. Flux-cored electrode
73
Why the argon and CO2 mixture is used in FCAW?
Answer
A. Smooth spray transfer, with minimum slag
74
Which electrode wire is more suitable for carbon steel fabrication in the GMAW process?
Answer
A. 70S – 6
75
Which type of electrode provides protective slag in flux-cored arc welding?
Answer
A. Tubular cored flux electrode
76
Gas diffusers of MIG/MAG welding are made by :
Answer
Question Cancelled
77
What gas combination will reduce spatter defect and improve arc stability in a MIG/MAG
welding process?
Answer
D. Argon/ CO2/O2
78
What is the name of the welding defect, with weld metal contracting during welding process?
Answer
A. Distortion
79
What is the defect in a weld joint, in which the weld metal melts through base metal
resulting in holes?
Answer
C. Burn through
80
What is the effect of MIG/MAG welding for a short stick out distance?
Answer
D. More spatter deposit in nozzle
81
What is the non-consumable electrode of a high melting point used in TIG welding?
Answer
C. Tungsten electrode
82
What is the full form of GTAW?
Answer
C. Gas Tungsten arc Welding
83
Which welding process is effective for nickel and titanium?
Answer
B. TIG welding
84
To identify the argon gas cylinder it is painted with :
Answer
B. Peacock blue color
85
What is the purpose of inert gas used in TIG welding?
Answer
B. To protect the molten metal from the atmospheric contamination
86
Why Zirconium tungsten electrodes are used in AC applications?
Answer
A. High resistance to contamination
87
How heat affected zone is covered and protected from atmospheric contaminations in GTAW?
Answer
A. Argon gas
88
How is the inert gas directed to flow over the weld pool, in TIG welding?
Answer
C. Through the ceramic nozzle
89
What is the purpose of the H.F. unit in TIG welding?
Answer
D. To initiate the arc without touching the electrode on the base metal
90
What is the device used to show the volume of the inert gas allowed to go to the welding torch
in TIG welding?
Answer
A. Flow meter
91
What is the process of replacing the air in a pipe with argon gas that will not react with the
root of the weld?
Answer
B. Purging
92
Which will not be present on the weld bead due to the use of shielding gas in TIG welding
process?
Answer
A. Slag
93
Which welding machine is to be used for welding aluminium by the TIG welding process?
Answer
A. AC welding machine
94
Name the device which allows the welder to use a longer electrode extension than with a
standard nozzle in TIG welding :
Answer
D. Gas lens
95
Which gas is used as an inert gas in GTAW for increased speed?
Answer
B. Helium
96
What is the name of the part of the TIG torch for holding the tungsten electrode?
Answer
A. Collet
97
Which type of cooling system is used in heavy-duty welding operations?
Answer
D. Water cooled
98
Which type of tungsten electrode is suitable for welding SS by TIG process with DC?
Answer
C. Thoriated tungsten electrode
99
What is the defect while TIG welding if the current is too low?
Answer
D. Lack of fusion
100
What is the cause for poor weld bead color in TIG welding process?
Answer
D. Contaminated or improper filler metal
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111/2022 14 A
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