A casting defect which results in general enlargement of a casting is known as

Workshop Technology
A casting defect which results in general enlargement of a casting is known as

Scab

Shift

Sand wash

Swell

Scab

Shift

Sand wash

Swell

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Workshop Technology
Extrusion

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

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

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

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

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Workshop Technology
In order to deliver molten metal from pouring basin to gate, a ________ is used.

None of these

Riser

Core

Sprue

None of these

Riser

Core

Sprue

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Workshop Technology
The purpose of a riser is to

Act as a reservoir for the molten metal

Deliver molten metal into the mould cavity

Feed the molten metal to the casting in order to compensate for the shrinkage

Deliver the molten metal from pouring basin to gate

Act as a reservoir for the molten metal

Deliver molten metal into the mould cavity

Feed the molten metal to the casting in order to compensate for the shrinkage

Deliver the molten metal from pouring basin to gate

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Workshop Technology
In order to get uniform thickness of the plate by rolling process, one provides

Antifriction bearings

Camber on the rolls

Hardening of the rolls

Offset on the rolls

Antifriction bearings

Camber on the rolls

Hardening of the rolls

Offset on the rolls

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Workshop Technology
The electrode tip diameter (d) in spot welding should be equal to (where t = Thickness of plate to be welded)

1.5 t

6 t

√t

3 t

1.5 t

6 t

√t

3 t

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Workshop Technology

Workshop Technology A casting defect which results in general enlargement of a casting is known as

Workshop Technology Extrusion

Workshop Technology In order to deliver molten metal from pouring basin to gate, a ________ is used.

Workshop Technology The purpose of a riser is to

Workshop Technology In order to get uniform thickness of the plate by rolling process, one provides

Workshop Technology The electrode tip diameter (d) in spot welding should be equal to (where t = Thickness of plate to be welded)

Workshop Technology
A casting defect which results in general enlargement of a casting is known as

Workshop Technology
Extrusion

Workshop Technology
In order to deliver molten metal from pouring basin to gate, a ________ is used.

Workshop Technology
The purpose of a riser is to

Workshop Technology
In order to get uniform thickness of the plate by rolling process, one provides

Workshop Technology
The electrode tip diameter (d) in spot welding should be equal to (where t = Thickness of plate to be welded)