A casting defect which occurs due to improper venting of sand is known as

Workshop Technology
A casting defect which occurs due to improper venting of sand is known as

Blow holes

Swell

Shift

Cold shuts

Blow holes

Swell

Shift

Cold shuts

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Workshop Technology
Extrusion

Is extensively used for making bolts and nuts

Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface

Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part

Is used for reducing the diameter of round bars and tubes by rotating dies which open and close rapidly on the work

Is extensively used for making bolts and nuts

Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface

Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part

Is used for reducing the diameter of round bars and tubes by rotating dies which open and close rapidly on the work

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Workshop Technology
The current in electric resistance welding can be regulated by

Varying the input supply

Any one of the listed here

Changing the primary turns of the transformer

Changing the secondary turns of the transformer

Varying the input supply

Any one of the listed here

Changing the primary turns of the transformer

Changing the secondary turns of the transformer

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Workshop Technology
Green sand is a mixture of

70% sand and 30% clay

30% sand and 70% clay

90% sand and 10% clay

50% sand and 50% clay

70% sand and 30% clay

30% sand and 70% clay

90% sand and 10% clay

50% sand and 50% clay

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Workshop Technology
A moving mandrel is used in

Metal cutting

Wire drawing

Forging

Tube drawing

Metal cutting

Wire drawing

Forging

Tube drawing

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Workshop Technology
A two high rolling mill consists of two rolls which rotate

At different speeds and in the same direction

At the same speed and in the same direction

At different speeds and in the opposite direction

At the same speed but in opposite direction

At different speeds and in the same direction

At the same speed and in the same direction

At different speeds and in the opposite direction

At the same speed but in opposite direction

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Workshop Technology

Workshop Technology A casting defect which occurs due to improper venting of sand is known as

Workshop Technology Extrusion

Workshop Technology The current in electric resistance welding can be regulated by

Workshop Technology Green sand is a mixture of

Workshop Technology A moving mandrel is used in

Workshop Technology A two high rolling mill consists of two rolls which rotate

Workshop Technology
A casting defect which occurs due to improper venting of sand is known as

Workshop Technology
Extrusion

Workshop Technology
The current in electric resistance welding can be regulated by

Workshop Technology
Green sand is a mixture of

Workshop Technology
A moving mandrel is used in

Workshop Technology
A two high rolling mill consists of two rolls which rotate