WorksheetsCasting Processes Test - Section A: Knowledge and Understanding
Total questions: 20
Worksheet time: 10mins
Casting in the context of engineering is defined as:
A process where molten metal is poured into a mold to obtain a desired shape after solidification.
A method of joining two metal pieces by heating them to a high temperature.
A technique of removing material from a workpiece to achieve the desired shape.
A process of coating a metal surface with another metal to prevent corrosion.
For each casting process below, give one example of a product made using it.
Sand Casting: Engine blocks, Die Casting: Toy car bodies, Investment Casting: Turbine blades, Permanent Mould Casting: Cylinder heads
Sand Casting: Toy car bodies, Die Casting: Turbine blades, Investment Casting: Cylinder heads, Permanent Mould Casting: Engine blocks
Sand Casting: Turbine blades, Die Casting: Engine blocks, Investment Casting: Toy car bodies, Permanent Mould Casting: Cylinder heads
Sand Casting: Cylinder heads, Die Casting: Engine blocks, Investment Casting: Toy car bodies, Permanent Mould Casting: Turbine blades
Sand casting is suitable for large items where dimensional accuracy is not critical because:
it allows for the production of large and complex shapes at a lower cost, even if precision is not high.
it always produces items with perfect dimensional accuracy.
it is only used for small items requiring high precision.
it is not suitable for any type of metal casting.
Die casting is preferred for producing large quantities of accurate components because:
it provides high dimensional accuracy and smooth surface finish
it is the cheapest manufacturing process
it requires no skilled labor
it can only produce small quantities
A company needs to manufacture 10,000 identical toy car bodies with high accuracy. The most suitable casting method for this purpose is:
Die casting
Sand casting
Investment casting
Centrifugal casting
A manufacturer is producing pressure valves that must withstand high stress. The most appropriate casting method is:
Die casting
Sand casting
Investment casting
Centrifugal casting
Casting is defined as:
The process of pouring molten material into a mold to obtain a desired shape.
The process of joining two metals by heating them.
The process of removing material from a workpiece to shape it.
The process of coating a surface with a thin layer of metal.
Compare investment casting and sand casting in terms of accuracy and complexity of shapes.
Investment casting offers higher accuracy and can produce more complex shapes than sand casting.
Sand casting offers higher accuracy and can produce more complex shapes than investment casting.
Both investment casting and sand casting offer similar accuracy and complexity of shapes.
Neither investment casting nor sand casting can produce complex shapes with high accuracy.
List the steps involved in Sand Casting as shown in Diagram 1:
1. Wooden Pattern 2. Sand Mould 3. Pouring Basin 4. Molten Metal Flow 5. Cope & Drag Separation
1. Sand Mould 2. Wooden Pattern 3. Pouring Basin 4. Molten Metal Flow 5. Cope & Drag Separation
1. Wooden Pattern 2. Pouring Basin 3. Sand Mould 4. Molten Metal Flow 5. Cope & Drag Separation
1. Wooden Pattern 2. Sand Mould 3. Molten Metal Flow 4. Pouring Basin 5. Cope & Drag Separation
List the steps involved in Die Casting as shown in Diagram 2:
1. Molten Metal 2. Injection Chamber 3. Steel Mould 4. High Pressure 5. Finished Part Ejected
1. Steel Mould 2. Molten Metal 3. Injection Chamber 4. Finished Part Ejected 5. High Pressure
1. Injection Chamber 2. Molten Metal 3. High Pressure 4. Steel Mould 5. Finished Part Ejected
1. Finished Part Ejected 2. Molten Metal 3. Injection Chamber 4. Steel Mould 5. High Pressure
List the steps involved in Investment Casting as shown in Diagram 3:
1. Wax Pattern 2. Ceramic Shell 3. Burnout 4. Molten Metal Poured 5. Shell Broken to Reveal Part
1. Sand Mold 2. Pour Metal 3. Cool Down 4. Remove Mold 5. Finish Part
1. Die Preparation 2. Metal Injection 3. Cooling 4. Eject Part 5. Surface Treatment
1. Pattern Making 2. Core Setting 3. Metal Pouring 4. Shakeout 5. Cleaning
List the steps involved in Permanent Mould Casting as shown in Diagram 4:
1. Metal Mould 2. Clay Coating 3. Molten Metal Poured 4. Cooling 5. Part Removed
1. Sand Mould 2. Wax Coating 3. Molten Metal Poured 4. Cooling 5. Part Removed
1. Metal Mould 2. Oil Coating 3. Molten Metal Poured 4. Cooling 5. Part Removed
1. Metal Mould 2. Clay Coating 3. Solid Metal Inserted 4. Cooling 5. Part Removed
Casting is a manufacturing process where ________ material is poured into a mould.
molten
solid
gaseous
powdered
Fill in the blank: The material ________ into the shape of the mould.
solidifies
evaporates
dissolves
expands
List one example product for each casting process:
Sand Casting: Manhole cover / Car part Die Casting: Toy car / Engine casing Investment Casting: Compressor wheel / Turbine blade Permanent Mould Casting: Pressure valve / Engine piston
Sand Casting: Glass bottle / Spoon Die Casting: Wooden chair / Table Investment Casting: Plastic cup / Plate Permanent Mould Casting: Paper clip / Stapler
Sand Casting: Bicycle frame / Screw Die Casting: Leather bag / Shoes Investment Casting: Rubber band / Eraser Permanent Mould Casting: Cloth hanger / Pen
Sand Casting: Light bulb / Wire Die Casting: Book / Notebook Investment Casting: Cardboard box / Envelope Permanent Mould Casting: Plastic bottle / Cap
Sand casting is suitable for large items because:
it can accommodate large and complex shapes easily
it requires very high precision
it is only used for small objects
it is the most expensive casting method
Die casting is preferred for accurate, high-volume production because:
it provides high dimensional accuracy and smooth surface finish
it is suitable only for low-volume production
it requires extensive manual labor
it produces rough and imprecise parts
The best casting method for toy car bodies is:
Die casting
Sand casting
Investment casting
Centrifugal casting
The best method for pressure valves is:
Using a safety relief valve
Applying excessive pressure
Blocking the valve outlet
Ignoring maintenance
Compare investment vs sand casting.
Investment casting provides better surface finish and dimensional accuracy than sand casting.
Sand casting provides better surface finish and dimensional accuracy than investment casting.
Both investment and sand casting provide similar surface finish and accuracy.
Investment casting is only used for large parts, while sand casting is for small parts.
