Production technology Quiz 1

A model or replica of a product that is used for forming an impression in damp sand or other suitable material is called

Die

Mould

Pattern

Core

The correct order of processes involved in a casting processis

Moulding/ core making -> Pattern Making -> Pouring molten metal -> Casting-> Fettling -> Testing

Pattern Making -> Moulding/ core making -> Pouring molten metal -> Casting-> Fettling -> Testing

Pattern Making -> Moulding/ core making -> Pouring molten metal -> Casting-> Testing -> Fettling

Pattern Making -> Moulding/ core making -> Fettling -> Pouring molten metal -> Casting-> Testing

Which of the following is NOT an advantage of casting process

Intricate shapes can be made

Any size/ weight/ material can be cast

Simple and inexpensive

Good surface finish and dimensional accuracy can be obtained

The parts to keep the core in place in the mould supporting its own weight and withstanding metallostatic force

Chaplets

Cope

Drag

Lag

A separate part made out of sand, generally baked, used to create cavity in the product (casting) is called

Mould

Core

Cavity

Chaplet

A column of molten metal placed in the mould to feed the castings as they shrink and solidy

Riser

Feed head

Pouring basin

Vent

What are the differences between pattern and casting?

Pattern is made of different material than casting

Pattern is made to slightly different size to take care of pattern allowances

Pattern may be split into 2 or three or many pieces, whereas casting is single piece

Pattern is only external envelope of the casting. Any interior cavities need to be taken care by separate cores.

The metal or wood frame with open top and bottom and used to make mould is called as

Cope

Drag

Flask

Pattern

The upper, middle and lower portions of a flask are called as

Cope, Drag and Cheek

Cheek, Drag and Cope

Cope, Cheek and Drag

Drag, Cope and Cheek

A manufacturing process by which a liquid material is usually poured into a mold, which contains a hollow cavity of the desired shape, and then allowed to solidify.

Forging

Sheet Metal work

Casting

Welding

A manufacturing process involving the shaping of metal by plastically deforming using localized compressive forces.

Forging

Sheet Metal work

Casting

Welding

A manufacturing process for producing raised or sunken designs or relief in thin metal strips

Forging

Sheet Metal work

Casting

Welding

A process of joining similar metals by application of heat with or without pressure and addition of filler material

Forging

Sheet Metal work

Casting

Welding

A small funnel shaped cavity at the top of the mould where molten metal is poured

Sprue

Pouring basin

Runner

Vent

The channel through which the molten metal is carried from sprue to the gate

Sprue

Pouring basin

Runner

Vent

Small opening in the mold to facilitate the escape of air, gas and steam

Sprue

Pouring basin

Runner

Vent

The passage through which molten metal flows from pouring basin to runner

Sprue

Pouring basin

Runner

Vent

To avoid injuring the edges of mould while drawing out of pattern, __ allowance is provided

Shrinkage allowance

Draft allowance

Machining allowance

Distortion allowance

Machining allowance is provided in which areas of casting?

All the areas of the casting

Only in the areas where machining is required

On all outer surfaces

On all inner cavities

Rapping allowance is provided to take care of

The enlarging of cavity when the pattern is rapped before its withdrawn

The reduction of cavity when the pattern is rapped before its withdrawn

Metal shrinkage

Distortion during cooling

Which of the following is NOT a constituent of mould sand

Silica

Moisture

Clay

Metal ships

Clay are the particles in the sand, which

Help in binding

Fails to settle when mixed in water

Are fine coal dust

Helps easy removal of pattern

If the porosity of sand is poor, then it leads to

Gas holes and pores in casting

Explosion of mould

Poor surface finish

Wastage of molten metal

The difference between green sand and dry sand is

Green sand is green in color and dry sand is black in color

Green sand is moist sand and Dry sand is without moisture

Green sand is the natural sand and dry sand is synthetic

Green sand is in the area around pattern, dry sand is used for outer filling

The sand that is used directly next to pattern and comes in contact with the molten metal is

Pattern sand

Backing sand

Facing sand

Loam sand

The sand with high clay content and used for larger castings is

Loam sand

System sand

Green sand

Clay sand

To prevent metal burning into the sand, Sea coal OR coal dust is added in which type of sand

Dry sand

Facing sand

Coal sand

Backing sand

Why the backing sand is usually black in color?

Its impure sand

Presence of high clay

Presence of oil

Addition of coal dust and burning on coming in contact with molten metal

Refractoriness is the property of sand that

It withstands the high temperature without fusing

Ability to flow into the intricate portions of pattern

Ability to stick together and provide strength to mould

Allows it to vent out the hot gas and air

The sand or powder sparyed to prevent moulding sand sticking to parting surface, pattern surface and mould joints is called

Parting sand

Clay

Green sand

Facing sand

Cohesiveness of sand depends upon

Moisture content

Bonding materials

Grain size and shape

All of the above

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Production technology Quiz 1

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