Mechanical Quizzes

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Welcome to your Welding Quizzes

Full name

Which one of the following is not a fusion welding process?

Brazing

Gas welding

Arc welding

Grey cast iron is generally welded by.....

Arc welding

Gas welding

TIG welding

The strength of brazed joint

Increases up to certain gap between the two joining surfaces beyond which it decreases

Increases with increase in gap between the two joining surfaces

Decreases with increase in gap between the two joining surfaces

In a 1G welding position,

the pipe or object is rotated about its longitudinal axis (horizontal X-axis)

Pipe is arranged at an angular position approximately 45 degrees from the reference axis

the pipe is in a horizontal or X-axis position but the pipe cannot be rotated. The welder carries out welding while moving around the pipe

Welding of aluminum is difficult due to its

low melting point

high tendency of oxidation

high thermal conductivity and low density

In fusion welding process, within the heat affected zone, the work material undergoes..

microstructure changed but does not melt

Both melting and microstructure changes after solidification

neither melting nor microstructure changes after solidification

In a 5G welding position,

the pipe or object is rotated about its longitudinal axis (horizontal X-axis)

Pipe is arranged at an angular position approximately 45 degrees from the reference axis

the pipe is in a horizontal or X-axis position but the pipe cannot be rotated. The welder carries out welding while moving around the pipe

Seam welding is a

multi spot welding

continuous spot welding

arc welding

Lap joint are employed on plates having thickness up to

5 to 10 mm

more than 3 mm

less than 3 mm

10.

Which gases are used in TIG welding?

CO2 and H2

argon and helium

helium and neon

11.

In a 6G welding position,

the pipe or object is rotated about its longitudinal axis (horizontal X-axis)

Pipe is arranged at an angular position approximately 45 degrees from the reference axis

the pipe is in a horizontal or X-axis position but the pipe cannot be rotated. The welder carries out welding while moving around the pipe

12.

In a 2G welding position,

the pipe or object is rotated about its longitudinal axis (horizontal X-axis)

pipe or object is kept vertical and welding is carrying out horizontally on a horizontal plane

the pipe is in a horizontal or X-axis position but the pipe cannot be rotated. The welder carries out welding while moving around the pipe

13.

Preheating is required in wedding..

Stainless steel

High speed steel

Cast iron

14.

Oxidizing flame is used to weld

Stainless steel

Copper

Cast iron

15.

For arc welding, open circuit voltage is of the order of

40 to 95 volts

100 to 125 volts

130 to 170 volts

16.

Materials used for coating the electrode is called

Flux

Binder

Slag

17.

For welding of non-ferrous metals which following current is preferred by arc welding..

AC low frequency

AC high frequency

18.

The main criteria for selection of electrode diameter in arc welding process is..

Voltage used

Thickness of material

Material to be welded

19.

In projection welding diameter of projection as compared to thickness of the sheet is proximately

Half

Double

Equal

20.

For welding of round bars which welding process is used..

Spot welding

Seam welding

Projection welding

21.

In welding, the flux is used for

To permit perfect cohesion of material

To remove the oxide of the metals formed at high temperature

All above

22.

A single V and single U butt weld are for sheets of approximate thickness

1 to 5 mm

5 to 15 mm

15 to 25 mm

23.

Two sheets of different material but same thickness can be welded by

Changing the size of one electrode

Time duration of current

Adjusting the current

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