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Welding Process Quiz

Total questions: 50

Worksheet time: 25mins

Name
Class
Date
1.

Welding is a process of

a)

Temporary joining

b)

Permanent joining

c)

Mechanical fastening

d)

Surface finishing

2.

Which of the following is a fusion welding process?

a)

Riveting

b)

Brazing

c)

Arc welding

d)

Bolting

3.

In arc welding, the heat is produced by

a)

Friction

b)

Electric arc

c)

Gas combustion

d)

Resistance

4.

Which electrode is used in TIG welding?

a)

Mild steel electrode

b)

Flux-coated electrode

c)

Tungsten electrode

d)

Carbon electrode

5.

Shielding gas used in MIG welding is

a)

Oxygen

b)

Nitrogen

c)

Argon

d)

Hydrogen

6.

The temperature of an electric arc is approximately

a)

1000°C

b)

2000°C

c)

4000°C

d)

6000°C

7.

Flux is used in welding to

a)

Increase current

b)

Prevent oxidation

c)

Increase arc length

d)

Cool the weld

8.

SMAW stands for

a)

Shielded Metal Arc Welding

b)

Submerged Metal Arc Welding

c)

Shielded Manual Arc Welding

d)

Standard Metal Arc Welding

9.

In gas welding, the fuel gas commonly used is

a)

Propane

b)

Butane

c)

Acetylene

d)

Hydrogen

10.

Neutral flame in gas welding is used for

a)

Aluminum

b)

Brass

c)

Mild steel

d)

Cast iron

11.

Which welding defect is caused by trapped gases?

a)

Crack

b)

Porosity

c)

Undercut

d)

Overlap

12.

Resistance welding works on the principle of

a)

Arc heating

b)

Gas combustion

c)

Electrical resistance heating

d)

Friction

13.

Spot welding is mainly used for

a)

Thick plates

b)

Sheet metal work

c)

Pipes

d)

Castings

14.

In butt welding, the plates are joined

a)

Side by side

b)

Overlapping

c)

End to end

d)

At right angles

15.

Which welding process uses pressure and heat without filler metal?

a)

Arc welding

b)

Gas welding

c)

Resistance welding

d)

MIG welding

16.

The purpose of preheating before welding is to

a)

Increase hardness

b)

Reduce residual stresses

c)

Improve surface finish

d)

Increase weld speed

17.

Which metal is difficult to weld due to oxidation?

a)

Steel

b)

Copper

c)

Aluminum

d)

Nickel

18.

Slag inclusion is caused due to

a)

Improper cleaning

b)

High current

c)

Low voltage

d)

Excess shielding gas

19.

The HAZ in welding stands for

a)

High Arc Zone

b)

Heat Affected Zone

c)

Hard Alloy Zone

d)

Heated Arc Zone

20.

Which welding is best suited for underwater welding?

a)

TIG welding

b)

MIG welding

c)

Arc welding

d)

Laser welding

21.

In oxy-acetylene welding, maximum temperature occurs in

a)

Outer cone

b)

Inner cone

c)

Flame envelope

d)

Tip of torch

22.

Which electrode coating helps stabilize the arc?

a)

Cellulose

b)

Flux

c)

Rutile

d)

Lime

23.

Which joint is strongest in welding?

a)

Lap joint

b)

Butt joint

c)

Corner joint

d)

Edge joint

24.

Weld spatter is caused by

a)

Low current

b)

High current

c)

Poor shielding

d)

Wrong polarity

25.

In MIG welding, the electrode is

a)

Non-consumable

b)

Carbon rod

c)

Consumable wire

d)

Tungsten rod

26.

TIG welding is also known as

a)

Gas welding

b)

Plasma welding

c)

GTAW

d)

SMAW

27.

Which welding process gives highest weld quality?

a)

Arc welding

b)

TIG welding

c)

Gas welding

d)

Spot welding

28.

Distortion in welding is caused by

a)

Uniform heating

b)

Rapid cooling

c)

Uneven heating and cooling

d)

Low temperature

29.

Which NDT method is used to detect surface cracks?

a)

Radiography

b)

Ultrasonic testing

c)

Dye penetrant test

d)

Magnetic particle test

30.

Welding current is measured in

a)

Volts

b)

Watts

c)

Ohms

d)

Amperes

31.

Arc length affects

a)

Weld penetration

b)

Weld quality

c)

Arc stability

d)

All of the above

32.

Which polarity gives deeper penetration in DC arc welding?

a)

DC straight polarity

b)

DC reverse polarity

c)

AC

d)

High frequency

33.

Laser welding is an example of

a)

Solid-state welding

b)

Fusion welding

c)

Resistance welding

d)

Forge welding

34.

Which material is commonly used as filler rod in gas welding of steel?

a)

Brass

b)

Aluminum

c)

Mild steel

d)

Cast iron

35.

Which defect appears as a groove along the weld toe?

a)

Porosity

b)

Undercut

c)

Crack

d)

Overlap

36.

Friction welding is a type of

a)

Fusion welding

b)

Solid-state welding

c)

Arc welding

d)

Resistance welding

37.

Which welding process uses a flux blanket?

a)

MIG welding

b)

TIG welding

c)

Submerged arc welding

d)

Gas welding

38.

Welding helmet is used to protect from

a)

Heat only

b)

Radiation only

c)

Sparks only

d)

Heat, radiation, and sparks

39.

Which gas is used for shielding in TIG welding?

a)

Oxygen

b)

Nitrogen

c)

Argon

d)

Carbon dioxide

40.

The main advantage of MIG welding is

a)

Low cost

b)

High speed

c)

High skill required

d)

Poor finish

41.

Which welding process is best for thin sheets?

a)

Gas welding

b)

TIG welding

c)

Spot welding

d)

Submerged arc welding

42.

What is weld bead?

a)

Base metal

b)

Weld metal deposited

c)

Flux residue

d)

Slag

43.

Excessive current may cause

a)

Porosity

b)

Spatter

c)

Poor fusion

d)

Slag inclusion

44.

Which metal cannot be welded easily?

a)

Mild steel

b)

Aluminum

c)

Copper

d)

Cast iron

45.

The angle between electrode and workpiece is called

a)

Arc angle

b)

Welding angle

c)

Electrode angle

d)

Torch angle

46.

Which welding uses no electric power?

a)

Arc welding

b)

Resistance welding

c)

Gas welding

d)

TIG welding

47.

Weld penetration depends on

a)

Current

b)

Voltage

c)

Travel speed

d)

All of the above

48.

Which welding defect is most dangerous?

a)

Porosity

b)

Crack

c)

Spatter

d)

Slag

49.

Welding symbol is used in

a)

Production

b)

Inspection

c)

Engineering drawings

d)

Maintenance

50.

Which standard is commonly used for welding symbols?

a)

ISO

b)

BIS

c)

AWS

d)

ASME

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