Chapter: Introduction
1.

Which of the following joint have high corrosion resistance?

A. Welding joint
B. Riveted joint
C. Bolted joint
D. None of the above
Answer» A. Welding joint
2.

The metals having good weldability, in descending order are

A. cast steel, iron, carbonsteel, castiron
B. carbon steel, iron, cast steel, castiron
C. iron, carbonsteel, cast steel, castiron
D. castiron, iron, carbon steel, cast steel
Answer» A. cast steel, iron, carbonsteel, castiron
3.

Which of the following is not included in weldability?

A. Ability of mechanical soundness
B. Serviceability of joint
C. Strain relieving brittleness
D. Metallurgical compatibility of metal
Answer» C. Strain relieving brittleness
4.

On which of the following factor, does weldability not depend?

A. Boiling point
B. Melting point
C. Thermal expansion
D. Thermal conductivity
Answer» A. Boiling point
5.

Which ofthe following is not away of correcting the metalwhich does not have good weldability properties?

A. Procedure of welding
B. Provision of fluxing material
C. Provision of filler material
D. Procedure of adding filler materials
Answer» D. Procedure of adding filler materials
6.

Which of the following is an example of plastic welding?

A. Gas welding
B. Arc welding
C. Forge welding
D. Thermit welding
Answer» C. Forge welding
7.

Which of the following is an example of fusion welding?

A. Arc welding
B. Forge welding
C. Resistance welding
D. Thermit welding with pressure
Answer» A. Arc welding
8.

Which ofthe followingwelding process is usedforweldingof sheetmetals in automobile and air craft industries?

A. Shield metal arc welding
B. Gas tungsten arc welding
C. Thermit welding
D. Resistance welding
Answer» D. Resistance welding
9.

In which of the following process, heat is created by blacksmith fire

A. Forge welding
B. Spot welding
C. Projection welding
D. Seam welding
Answer» A. Forge welding
10.

The voltage needed in resistance welding does not depend upon

A. Composition
B. Area
C. Thickness of weld
D. Length of weld
Answer» D. Length of weld
11.

In resistance welding, two electrodes are made of

A. Aluminium
B. Copper
C. Iron
D. Bronze
Answer» B. Copper
12.

Arc welding machine uses only D.C. supply.

A. True
B. False
C. all
D. none
Answer» B. False
13.

The negative pole of the electrode burns away faster than the positive pole.

A. True
B. False
C. all
D. none
Answer» B. False
14.

Which of the following is affected by weld contour?

A. Fatigue
B. Creep
C. Highpressureproperty
D. Lowpressureproperty
Answer» A. Fatigue
15.

Which of the following materials are not suited for cold welding?

A. Brass
B. Steel
C. Silver
D. Gold
Answer» B. Steel
16.

Match the following
1. Seam welding 1.rods and pipes of uniform cross section
2. Butt welding 2. Welding satellite tips to tools
3. Percussion welding 3. ERWpipeswelding
Which of the following is true?

A. 1-3, 2-2, 3-1
B. 1-3, 2-1, 3-2
C. 1-2, 2-3, 3-1
D. 1-2, 2-1,3-3
Answer» B. 1-3, 2-1, 3-2
17.

What is the capacity of an automatic welding machine?

A. 100 to200A
B. 300 to 400A
C. 500 to700A
D. 800 to 3000A
Answer» D. 800 to 3000A
18.

What is the capacity of a light manual welding machine?

A. 100 to200A
B. 300 to 400A
C. 500 to700A
D. 60 amp to 500 amp
Answer» C. 500 to700A
19.

What is the efficiency of an A.C. welding transformer?

A. 0.6
B. 0.7
C. 0.8
D. 0.9
Answer» C. 0.8
20.

What is the amount of electric energy required per kg in dc welding operation?

A. 1-4 kWh
B. 3-7 kWh
C. 4-9 kWh
D. 6-10 kWh
Answer» D. 6-10 kWh
21.

During fabrication joining of two or more components are ___

A. Temporarily
B. Permanently
C. Temporarily or permanently both
D. None of the above
Answer» C. Temporarily or permanently both
22.

During fabrication which processes are included

A. Welding
B. Brazing
C. Soldering
D. All of the above
Answer» D. All of the above
23.

The Weldability of the metals in descending order

A. Iron, Steel, Cast iron, Low Alloy steel
B. Steel, Cast iron, Iron, Low Alloy steel
C. Iron, Cast iron, steel, low Alloy steel
D. Steel, Iron, Cast iron, Low Alloy steel
Answer» A. Iron, Steel, Cast iron, Low Alloy steel
24.

The Weldability of the metals in Ascending order

A. Low Alloy Steel, Stainless Steel, Cast Iron, Steel
B. Low Alloy Steel, Cast Iron, Steel, Stainless Steel
C. Stainless Steel, Low Alloy Steel, Cast Iron, Steel
D. Stainless Steel, Low Alloy Steel, Steel, Cast Iron
Answer» C. Stainless Steel, Low Alloy Steel, Cast Iron, Steel
25.

During the welding power require to produce arc to join the metals are

A. Low voltage low ampere
B. Low voltage high ampere
C. High voltage low ampere
D. High voltage high ampere
Answer» B. Low voltage high ampere
26.

Out of them which of the power source used in welding

A. Bilopar welding generator,
B. Multi operator D.C. welding sets
C. Both of them
D. None of them
Answer» C. Both of them
27.

Static type power sources include

A. Transformer, Motor-driven generator
B. Rectifier, Engine-driven Generator
C. Transformer, Rectifier
D. Motor-driven generator, Engine-driven generator
Answer» C. Transformer, Rectifier
28.

Rotating type power sources includes

A. Transformer, Motor-driven generator
B. Rectifier, Engine-driven Generator
C. Transformer, Rectifier
D. Motor-driven generator, Engine-driven generator
Answer» D. Motor-driven generator, Engine-driven generator
29.

Which type of plates cannot be welded in single pass

A. Thick plates
B. Thin Plates
C. all
D. none
Answer» A. Thick plates
30.

In power-sources Transformer can change polarity or not?

A. Yes
B. No
C. all
D. none
Answer» B. No
31.

In arc welding voltage is dependent of _____

A. Arc length
B. Arc gap
C. Both of them
D. None of them
Answer» C. Both of them
32.

The percentage of __ minutes duration during which the power source with necessary output can be used without causing any damage

A. 5
B. 10
C. 50
D. 60
Answer» B. 10
33.

In power sources Current used is

A. 50-1000 Amp
B. 500-1000 Amp
C. 100-500 Amp
D. 50-200 Amp
Answer» A. 50-1000 Amp
34.

Full form of OCV is

A. Output current voltage
B. Open command voltage
C. Open current voltage
D. Output command voltage
Answer» C. Open current voltage
35.

Which type of Power source is Solid State

A. Static type
B. Rotating type
C. Special type
D. None of them
Answer» C. Special type
36.

Which of power source is an engine-driven generator

A. Static type
B. Rotating type
C. Special type
D. None of them
Answer» B. Rotating type
37.

Which of power source is Rectifier?

A. Static type
B. Rotating type
C. Special type
D. None of them
Answer» A. Static type
38.

Full-Form of the MMAW is

A. Manual metal arc welding
B. Molted metal arc welding
C. Mix Metal arc welding
D. Metal arc welding
Answer» A. Manual metal arc welding
39.

The voltage needed in resistance welding does not depend upon

A. Composition
B. Area
C. Thickness
D. Length
Answer» D. Length
40.

Which type of process is also known as the fabrication process?

A. Casting
B. Forming
C. Joining
D. None of them
Answer» C. Joining
41.

Arc length in arc welding should be equal to ___

A. Half the diameter of the electrode rod
B. Rod diameter
C. Twice the rod diameter
D. None of the above
Answer» B. Rod diameter
Chapter: Drawing Interpretation
42.

In welding symbol, if the symbol is above the baseline then the welding is to be done at

A. The arrow side
B. Other side of the arrow
C. Right side of the arrow
D. Both side of the arrow
Answer» B. Other side of the arrow
43.

Where the welding symbol is placed when the welding is to be done at the arrow side

A. Below the baseline
B. Above the baseline
C. A & B both
D. None of them
Answer» A. Below the baseline
44.

For the vertical position of the weld fillet and other symbols should saw in which side

A. Right
B. Left
C. Bottom
D. Above
Answer» B. Left
45.

The full form of DFW is

A. Direct finish weld
B. Direct fusion welding
C. Diffusion welding
D. Double fusion Welding
Answer» C. Diffusion welding
46.

Full form of FB is Welding process is

A. Friction brazing
B. Furnace brazing
C. Function brazing
D. Finish brazing
Answer» B. Furnace brazing
47.

Full form of FRW in Welding process are

A. Friction Welding
B. Furnace Welding
C. Fusion Reaction welding
D. None of them
Answer» A. Friction Welding
48.

Ground Connection equipment is used for ______ welding

A. Gas welding
B. Arc Welding
C. all
D. none
Answer» B. Arc Welding
49.

In Edge preparation selection of joint is based on the following factors

A. Effect of warping
B. Cost of designing of the product
C. Characteristics of the product
D. All of them
Answer» D. All of them
50.

During edge preparation bevel angle is

A. 15º
B. 30º
C. 40º
D. 60º
Answer» C. 40º
51.

The gap between two plates to be joined with a view to obtain full penetration are

A. 1 to 3 mm
B. 3 to 5 mm
C. 5 to 8 mm
D. 5 to 10 mm
Answer» B. 3 to 5 mm
52.

For plates of thickness more than 16 mm which weld is used

A. Square butt weld
B. Single V butt weld
C. Double V butt Weld
D. Double U butt Weld
Answer» D. Double U butt Weld
53.

For plates of thickness 3-5 mm which weld is used

A. Square butt weld
B. Single V butt weld
C. Double V butt Weld
D. Double U butt Weld
Answer» A. Square butt weld
54.

The shape of slots made during edge preparation is based on

A. Joint design
B. Thickness of material
C. Joint strength required
D. All of the above
Answer» D. All of the above
55.

For 0.5 to 15 mm thick plates are welded using

A. Single-V & Single-U edges
B. Double-V Edges
C. Double-V & Double-U edge
D. Square face edge
Answer» A. Single-V & Single-U edges
56.

In welding using Single-V and Single-U edge beveling angle is of

A. 15º to 30º
B. 30º to 60º
C. 60º to 80º
D. 5º to 15º
Answer» C. 60º to 80º
57.

In flat or down hand position the weld bed is

A. Horizontal axis
B. Vertical Axis
C. all
D. none
Answer» A. Horizontal axis
58.

During the horizontal position of the weld, the slope would be up to

A.
B. 10º
C.
D.
Answer» B. 10º
59.

During the over-head position of the weld slope would be

A. 0º-15º
B. 0º-30º
C. 0º-45º
D. 0º-90º
Answer» C. 0º-45º
60.

During the Inclined position of the weld Rotation between

A. 0º-15º
B. 0º-30º
C. 0º-45º
D. 0º-90º
Answer» D. 0º-90º
61.

In the welding position, an angle between the line bisecting the weld crosssection and vertical plane passing through the weld root is known as

A. Slope
B. Rotation
C. all
D. none
Answer» B. Rotation
62.

In the welding position, an angle between weld root line and horizontal reference plane is known as

A. Slope
B. Rotation
C. all
D. none
Answer» A. Slope
63.

Choose the color of acetylene cylinder

A. Maroon
B. Yellow
C. Black
D. Red
Answer» A. Maroon
64.

Choose the color of oxygen cylinder

A. Maroon
B. Yellow
C. Black
D. Red
Answer» C. Black
65.

In oxy-acetylene gas welding heat is obtained by

A. An electric ac
B. Gas Flame
C. Chemical
D. None of these
Answer» B. Gas Flame
66.

Which type of weld is used lying in the same plane

A. Butt Joint
B. Edge Joint
C. Lap Joint
D. Corner Joint
Answer» A. Butt Joint
67.

Which type of butt joint is used to joint 9 mm to 13 mm thick plate

A. Single-V or Single-U butt joint
B. Double-V or double-U butt joint
C. all
D. none
Answer» A. Single-V or Single-U butt joint
68.

In butt joint, which of the edge preparation is costlier

A. V- shape
B. U-Shape
C. all
D. none
Answer» B. U-Shape
69.

In lap joint thickness of the sheets is up to

A. 3 mm
B. 4 mm
C. 10 mm
D. 15 mm
Answer» A. 3 mm
70.

When two plates are to be joined by keeping their surface at about 90º to one-another

A. Lap joint
B. Butt Joint
C. Tee Joint
D. Corner Joint
Answer» C. Tee Joint
71.

Full of the WPS is

A. Welding Procedure Specification
B. Welding Process System
C. Welding Process Specification
D. Welding Procedure System
Answer» A. Welding Procedure Specification
Chapter: Fabrication Processes and Safety
72.

Inwhichwelding the surfacesoftwo components are subjected to static normalforce and oscillating shear stress?

A. Diffusion welding
B. Thermit welding
C. Laser beam welding
D. Ultrasonic welding
Answer» D. Ultrasonic welding
73.

Electron beam welding is carried out in?

A. Inert atmosphere
B. Partially filled chamber
C. Vacuum
D. Partially vacuum
Answer» C. Vacuum
74.

Laser beam weldingis a joining process.

A. fission
B. fusion
C. coherent
D. plastic
Answer» B. fusion
75.

Which of the following is used to direct laser beam?

A. glass apertures
B. perforated glass sheets
C. flat optical elements
D. electro-magnetic coils
Answer» C. flat optical elements
76.

Inert gas shielding is generally employed to protect _____

A. laser beam
B. molten puddle of metal
C. filler electrode
D. lenses
Answer» B. molten puddle of metal
77.

The lasing material or crystal is excited by _____

A. neon lamps
B. krypton lamps
C. tungsten wire laps
D. CFLs
Answer» B. krypton lamps
78.

Which ofthe following does not holdtrue aboutlaserbeamwelding?

A. Laser welding cannot be used in case ofjoints atintricate locations
B. It can produce tiny welds
C. Laser welding can be used for avariety of metal combinations
D. In case of LBW, thin welds on small diameter wires are less susceptible to burn back
Answer» A. Laser welding cannot be used in case ofjoints atintricate locations
79.

Laser welds are not influenced by _____

A. electric field
B. magnetic field
C. radio waves
D. ultraviolet rays
Answer» B. magnetic field
80.

Which of the following material properties has no effect on laser beam machining?

A. Reflectivity
B. Thermal conductivity
C. Weldability
D. Electrical conductivity
Answer» D. Electrical conductivity
81.

In oxy-acetylene welding colour of oxygen cylinder is

A. Red
B. Maroon
C. Black
D. Brown
Answer» C. Black
82.

In oxy-acetylene welding colour of oxygen cylinder is

A. Red
B. Maroon
C. Black
D. Brown
Answer» B. Maroon
83.

In arc welding, arc initiation voltage is of the order

A. 20-60V
B. 60-100V
C. 100-140V
D. 140-180V
Answer» B. 60-100V
84.

In arc welding, the three elements to be controlled to obtain satisfactory welding operation are

A. Current, voltage and speed of travel
B. Current, voltage and arc length
C. Current, arc length and speedoftravel
D. Voltage, arc length and speed oftravel
Answer» A. Current, voltage and speed of travel
85.

Which welding process is used to join two thick plates in one single pass?

A. Oxy-acetylene welding
B. Gas tungsten arc welding (TIG)
C. Gas metal arc welding (MIG)
D. Electroslag welding
Answer» D. Electroslag welding
86.

The followingwelding process is usedtoweldfastener to plateswithout drillingorpunching holes?

A. Electroslag welding
B. Oxy-acetylene welding
C. Butt welding
D. Stud welding
Answer» D. Stud welding
87.

The process which employ an exothermal chemical reaction to develop high temperature

A. Electroslag welding
B. Plasmaarcwelding
C. Thermit welding
D. Stud welding
Answer» C. Thermit welding
88.

Which process allows fusion welds of great depth with minimum width?

A. Electron beam welding
B. Ultrasonic welding
C. Plasma arc welding
D. Friction welding
Answer» A. Electron beam welding
89.

The process of carbon arc welding is not used for which of the following material?

A. Copper
B. Bronze
C. Aluminium
D. Iron
Answer» D. Iron
90.

The distance from the center of arc to the tip of electrode is called what?

A. Arc distance
B. Arc length
C. Arccrater
D. Arcdepth
Answer» B. Arc length
91.

What is the length of the arc generally?

A. 1mm –2mm
B. 2mm –3mm
C. 3mm – 4mm
D. 4mm – 5mm
Answer» C. 3mm – 4mm
92.

With an increase in the heatinput of arcwelding method, how does it affectthewelding speed?

A. Increases
B. Decreases
C. Remains same
D. No relation
Answer» B. Decreases
93.

With an increase in the heatinput of arc welding method, how does it affectthe required current?

A. Increases
B. Decreases
C. Remains same
D. No relation
Answer» A. Increases
Chapter: Inspection and Testing
94.

Junction between two work piece and weld face is known as?

A. Throat
B. Toe
C. Root
D. Puddle
Answer» A. Throat
95.

Portion at which two work piece are at the nearest distance is called as?

A. Throat
B. Toe
C. Root
D. Puddle
Answer» C. Root
96.

Which of the following defects occur due to flux employed and electrode coating?

A. Inclusion of slay
B. Inadequate penetration
C. Incomplete fusion
D. Porosity
Answer» A. Inclusion of slay
97.

Which ofthe following defectsoccurwhen thedeposited metal are notfocused atthe root of weld?

A. Inclusion of slay
B. Inadequate penetration
C. Incomplete fusion
D. Porosity
Answer» B. Inadequate penetration
98.

Which of the following defects occur when weld metal layer fail to fuse together?

A. Inclusion of slay
B. Inadequate penetration
C. Incomplete fusion
D. Porosity
Answer» C. Incomplete fusion
99.

Which ofthe following defects occur due to the entrapment of gas bubbles by the freezing dendrites during the cooling of molten pad?

A. Inclusion of slay
B. Inadequate penetration
C. Incomplete fusion
D. Porosity
Answer» D. Porosity
100.

Which of the following defects occur due to melting or burning away of base metal?

A. Under cut
B. Spatter
C. Cracking in weld metal
D. Cold cracking
Answer» A. Under cut
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