| Post Name | TRAINING INSTRUCTOR (WELDER) - SCHEDULED DEVELOPMENT |
|---|---|
| Question Paper Code | 136/2023 |
| Category Code | 597/2021 |
| Date of Test | 1 August 2023 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Which operation is to remove burrs from a plate after cutting ?
Answer
B. Filing
2
The reading accuracy of steel rule is
Answer
B. 0.5 mm
3
The weight of an engineer’s hammer used for marking purposes, is
Answer
C. 250 gms
4
What happened if bench vice is over tightened ?
Answer
B. Spindle damaged
5
The angle of the prick punch is
Answer
C. 30°
6
Which of the following metal is used for making nozzle in gas welding ?
Answer
C. Copper
7
What is the purpose of copper coating on mild steel filler rod used in gas welding ?
Answer
A. Rust proof
8
Oxygen becomes liquefied at which temperature in normal atmospheric pressure ?
Answer
D. – 182.9°C
9
What is the base for selecting the nozzle size for gas welding of a pipe ?
Answer
C. Pipe wall thickness
10
What flux is to be used for gas welding stainless steel plates ?
Answer
D. Zinc chloride and potassium dichromate paste
11
Which filler rod to be used for gas welding aluminium ?
Answer
D. Pure aluminium, 5% silicon aluminium alloy
12
Which material is used in manufacture gas cylinder ?
Answer
D. Solid drawn steel
13
What is the purpose of cleaning of sheets before doing gas welding ?
Answer
B. To avoid porosity
14
Which type welding uses a non–ferrous filler with melting point above 450°, than
base metal ?
Answer
A. Brazing
15
Which metal can be cut by oxy-acetylene gas cutting process ?
Answer
C. mild steel
16
Which is the hottest point in a oxy-acetylene flame ?
Answer
D. 3000 – 3200 C
17
What is the use of oxidising flame ?
Answer
B. Suitable for brass welding
18
What are the defects in generated acetylene gas ?
Answer
D. Hydrogen, lime dust, ammonia and water vapour
19
Which material is stored at the bottom compartment of acetylene gas purifier ?
Answer
C. Pumice stone
20
Which safety device is fitted to avoid explosion of acetylene generator due to high
pressure ?
Answer
C. Hydraulic back pressure valve
21
How the construction of a nozzle for gouging is identified ?
Answer
D. Slightly bent nozzle with circular preheating six holes
22
When does the defect of gouging on cutting face takes place ?
Answer
C. Excessive speed, inadequate pre-heating
23
What is the temperature in the weld area plasma arc welding process ?
Answer
A. 20,000 C to 30,000 C
24
Which electrode is used in plasma arc welding ?
Answer
C. Tungsten
25
Which process cuts the stainless steel, carbon steel with the help of high jet velocity ?
Answer
A. Plasma arc process
26
Which type of welding is to be used to make joint of thick pipes of rails ?
Answer
B. Pressure Thermit welding
27
Which gas is suitable for welding of carbon steel and titanium by plasma arc welding
process ?
Answer
C. Argon
28
Which test indicates the hardness of a metal ?
Answer
A. Brinell test
29
Which type of rivets are suitable for boiler shells ?
Answer
C. Snap
30
Which welding process enables to weld dissimilar metals ?
Answer
A. Brazing
31
Which heat treatment process causes the reduction of brittleness in the steel ?
Answer
C. By tempering
32
What is the process of heating steel to specific temperature and cooling suddenly ?
Answer
D. Quenching
33
What is the name of short weld made prior to the welding to hold the plates in perfect
alignment ?
Answer
B. Tack weld
34
Which one of the below is to control distortion ?
Answer
C. Use few passes with large electrode
35
What is the percentage of carbon in medium carbon steel ?
Answer
C. 0.30% to 0.6%
36
In which type of arc welding machine, the parts of the commutators are fixed ?
Answer
A. Motor generator set
37
What should be the shade number of the filter glass to be used for arc welding with
150 amps current ?
Answer
C. Shade number-11
38
What are the effect of arc length used for the long arc ?
Answer
A. Unstable arc
39
Which one of the following metals cannot be welded by AC welding machine ?
Answer
A. Brass
40
The capacity of an arc welding machine is indicated by
Answer
C. Output current in amps
41
How much gap is maintained between the grinding wheel and the work rest on a
pedestal grinder ?
Answer
D. 1 to 2 mm
42
What is the angle of electrode while welding in vertical position ?
Answer
C. 80° to 90°
43
Which element is present in contact electrode in large proportion ?
Answer
D. Iron
44
What is the fusion zone ?
Answer
A. Fused depth
45
What is polarity ?
Answer
B. direction of current
46
Which type of arc produce humming sound ?
Answer
A. long arc length
47
How do you name the depression formed at the end of the weld ?
Answer
B. Crater
48
What is the pre heating temperature of cast iron ?
Answer
A. 200 to 310°C
49
What is the grade of hacksaw blades with pitch 0.8 mm ?
Answer
A. Fine
50
How is the electrode size identified ?
Answer
D. verall) of electrode
51
Which type of tungsten electrode is suitable for welding of stainless steel by tig
process with dC ?
Answer
C. Thoriated tungsten electrode
52
lnert gases which one produce the deepest penetration in tig welding process ?
Answer
D. Argon
53
Helium gas is best suited for welding thicker metals because
Answer
B. high arc voltage
54
Helium is _______ times lighter than Argon.
Answer
C. ten
55
What is the usual torch angle tilt on either side of vertical in GmAW ?
Answer
A. 10° – 20°
56
Which metal transfer process in GmAW produces strong weld with least spatter ?
Answer
D. pulsed transfer
57
What ampere range required for setting 1.2 mm filler wire for welding mild steel in
mIG/mAG welding ?
Answer
D. 100 – 225 amps
58
Which metal is welded with self-shielded type FCAW ?
Answer
C. carbon steel
59
What is the trouble shooting to wire wrapping on drive rolls of wire feeder in GmAW ?
Answer
C. check drive rolls align properly
60
What defect will occur in the weld metal, if the arc voltage and travel speed is low in
mIG/mAG welding ?
Answer
D. weld overlap
61
Which welding process is effective for nickel and titanium ?
Answer
B. tig welding
62
What is the defect while TIG welding if the current is too low ?
Answer
D. lack of fusion
63
What is the melting point of tungsten ?
Answer
A. 3410°C
64
What is the bore diameter of ceramic nozzle to avoid porosity while doing TIG welding ?
Answer
C. correct sized
65
What is the function of a little hydrogen added to argon for welding of stainless steel
in GTAW process ?
Answer
B. improves heat transfer
66
What is the defect caused by high current in TIG welding ?
Answer
C. undercut
67
Which gas is used as inert gas in GTAW for increased speed ?
Answer
B. helium
68
What is the reason for arc wanders while in AC TIG welding ?
Answer
Question Cancelled
69
What is the name of the part of TIG torch for holding tungsten electrode ?
Answer
A. collet
70
Which gas is inactive or deficient is active chemical properties in TIG welding ?
Answer
Question Cancelled
71
What is percentage of deposition efficiency in FCAW process ?
Answer
B. 80% to 86%
72
Which gas/mixture is likely to reduce the spatter loss in FCAW ?
Answer
A. argon and CO2 mixed
73
What is the difficulty in starting of arc in GMAW ?
Answer
Question Cancelled
74
What is the range of electrode for mAG/CO2 welding ?
Answer
A. 0.8 mm to 1.6 mm
75
ln electron beam welding, electrons given off by the filament are accelerated and
focused by
Answer
A. Electron gun
76
At the junction of the two sheets, the duration of current flow that results in the
formation of a molten nugget is known as
Answer
C. Weld time
77
The purpose of hard facing is to provide resistance to
Answer
D. All the above
78
To minimise the depression in spot welding use
Answer
D. All the above
79
The metal that cannot be joined by projection welding
Answer
B. Copper
80
metal that is suitable to weld in forge welding
Answer
A. Wrought iron
81
An example of the type of surfacing
Answer
B. Cladding
82
Which type of resistance welding process can join irregular faced metals without
edge preparation ?
Answer
B. Flash butt welding
83
The type of welding that is used to weld thicker metal in a single pass
Answer
B. Electro slag welding
84
Which of the following metals can be welded in the underwater welding process ?
Answer
D. mild steel
85
ln which type of welding cast iron, lead and zinc alloys cannot be welded ?
Answer
A. Flash butt welding
86
Which type of power source is used for underwater welding ?
Answer
C. direct current
87
Is work not a Part of an electrical circuit in this welding ?
Answer
C. Atomic hydrogen
88
The method of pipe welding chosen depends on
Answer
C. The size of the pipe and its application
89
Which one of the following pipe welding position stands for 45° inclined position
welding ?
Answer
D. 6G
90
The weld symbol is on both sides of the reference line it means
Answer
A. Weld is made on both side of the joint
91
ln fillet welding, the leg length indicated by the letter is
Answer
A. z
92
ln the 5G position
Answer
B. Pipe axis is parallel to the ground
93
Which Country’s standard code is dIN ?
Answer
D. Germany
94
Identify the NdT that is used to detect surface defects as well as subsurface defects
in ferrous metals.
Answer
D. magnetic particle test
95
Fabrication costs involve the cost of
Answer
C. Preparation, welding and finishing
96
The test is used to identify the ductility of the weld metal
Answer
Question Cancelled
97
The time a welder spends in operations other than welding is known as
Answer
D. down time
98
The test is used to identify surface defects in ferrous, non-ferrous and non-metallic
materials
Answer
D. liquid penetrant test
99
In the AWS codification of electrodes, the 3rd digit indicates
Answer
D. Welding position
100
The major advantage of this test is its portability
Answer
A. Gamma ray test
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