WMU EDMM 1500 TEST 2 QUESTIONS WITH CORRECT ANSWERS LATEST UPDATE
2025/2026
What are the 3 classifications of casting? - Answers 1. Expandable mold reusable pattern
2.Expandable mold expandable pattern
3. Permanent mold no pattern
What is a benefit of expandable mold reusable pattern? - Answers cheap to make
How are expandable mold reusable pattern castings made? - Answers Through chemically
bonded sand systems.
What are expandable mold expandable pattern castings also known as? - Answers investment
casting or lost wax
What do you do with expandable mold expandable pattern casting when you're done? - Answers
Throw it away
How long does a die casted permanent mold no pattern take to make? - Answers 15-30 seconds
What is made from centrifugal permanent mold no pattern casting? - Answers Pipes
What are the 4 key factors in casting? - Answers 1. Flow of the molten material into the cavity
2. How it solidifies
3. The cooling rate
4. Type of material
What does a gentle molten metal flow entail? - Answers minimizes gas and sand entrapment
What does a rapid molten metal flow entail? - Answers preclude freezing before filling
What does a diversionary molten metal flow entail? - Answers skims off or filter the slag and
contaminants
What is Chvorinov's rule? - Answers chunky shapes solidify more slowly than think intricate
shapes.
What is green sand made out of? - Answers recycled sand, water, and a small amount of clay
What is green sand castings tooling cost? - Answers Low
Explain shell molding. - Answers Clean sand coated with thermosetting resin, has a moderate
tooling cost.
, Explain foam casting. - Answers Vibrate loose sand off foam patterns, pour molten material into
mold which vaporizes the pattern.
Describe the tooling cost and cycle time of foam casting. - Answers High tooling cost and long
overall cycle.
Why does a permenant mold have a high tooling cost? - Answers Complex with high heat and
pressure as well as over 100,000 parts.
What does true centrifugal casting make? - Answers iron pipes
What does true semi-centrifugal casting make? - Answers wheel covers
What does a dimensional error in casting cause? - Answers shrink allowance, miss-alignment
What does inclusions in casting cause? - Answers metal oxides, slag
What is a cohesive joint and how is it joined? - Answers Same material throughout the joint by
welding.
What is a adhesive joint and how is it joined? - Answers Adhesive material different from the
base material by brazing and soldering or polymer adhesives.
How is a mechanical joint joined (6)? - Answers Rivets, fasteners, clips, push nuts, snap fits, and
crimps.
What is arc or SMAW welding? - Answers high current, low voltage which has a coated rod that
keeps air away.
What is MIG (gas metal arc (GMAW)) welding? - Answers Wire is fed into a weld as a filler which
has shielding gas the protects the weld.
What is electrogas welding? - Answers A fully automated water cooled sliding copper shoe that
has similar components to MIG.
What is electroslag welding? - Answers Used for strip cladding with similar components to flux-
cored welding done in a single pass.
What is the heat affected zone? (HAZ) - Answers The band of base metal adjacent to a weld is
subjected to high temperature for a short time in the welding process.
What do arc, MIG, Flux-cored, electrogas, and electroslag welding all have in common? -
Answers They can all be used to weld steel.
What is special about MIG welding? - Answers It can weld aluminum
Explain the benefit of spot welding and where you might see it. - Answers fast, inexpensive, and
reliable. Could see up to 10,000 on a car.
2025/2026
What are the 3 classifications of casting? - Answers 1. Expandable mold reusable pattern
2.Expandable mold expandable pattern
3. Permanent mold no pattern
What is a benefit of expandable mold reusable pattern? - Answers cheap to make
How are expandable mold reusable pattern castings made? - Answers Through chemically
bonded sand systems.
What are expandable mold expandable pattern castings also known as? - Answers investment
casting or lost wax
What do you do with expandable mold expandable pattern casting when you're done? - Answers
Throw it away
How long does a die casted permanent mold no pattern take to make? - Answers 15-30 seconds
What is made from centrifugal permanent mold no pattern casting? - Answers Pipes
What are the 4 key factors in casting? - Answers 1. Flow of the molten material into the cavity
2. How it solidifies
3. The cooling rate
4. Type of material
What does a gentle molten metal flow entail? - Answers minimizes gas and sand entrapment
What does a rapid molten metal flow entail? - Answers preclude freezing before filling
What does a diversionary molten metal flow entail? - Answers skims off or filter the slag and
contaminants
What is Chvorinov's rule? - Answers chunky shapes solidify more slowly than think intricate
shapes.
What is green sand made out of? - Answers recycled sand, water, and a small amount of clay
What is green sand castings tooling cost? - Answers Low
Explain shell molding. - Answers Clean sand coated with thermosetting resin, has a moderate
tooling cost.
, Explain foam casting. - Answers Vibrate loose sand off foam patterns, pour molten material into
mold which vaporizes the pattern.
Describe the tooling cost and cycle time of foam casting. - Answers High tooling cost and long
overall cycle.
Why does a permenant mold have a high tooling cost? - Answers Complex with high heat and
pressure as well as over 100,000 parts.
What does true centrifugal casting make? - Answers iron pipes
What does true semi-centrifugal casting make? - Answers wheel covers
What does a dimensional error in casting cause? - Answers shrink allowance, miss-alignment
What does inclusions in casting cause? - Answers metal oxides, slag
What is a cohesive joint and how is it joined? - Answers Same material throughout the joint by
welding.
What is a adhesive joint and how is it joined? - Answers Adhesive material different from the
base material by brazing and soldering or polymer adhesives.
How is a mechanical joint joined (6)? - Answers Rivets, fasteners, clips, push nuts, snap fits, and
crimps.
What is arc or SMAW welding? - Answers high current, low voltage which has a coated rod that
keeps air away.
What is MIG (gas metal arc (GMAW)) welding? - Answers Wire is fed into a weld as a filler which
has shielding gas the protects the weld.
What is electrogas welding? - Answers A fully automated water cooled sliding copper shoe that
has similar components to MIG.
What is electroslag welding? - Answers Used for strip cladding with similar components to flux-
cored welding done in a single pass.
What is the heat affected zone? (HAZ) - Answers The band of base metal adjacent to a weld is
subjected to high temperature for a short time in the welding process.
What do arc, MIG, Flux-cored, electrogas, and electroslag welding all have in common? -
Answers They can all be used to weld steel.
What is special about MIG welding? - Answers It can weld aluminum
Explain the benefit of spot welding and where you might see it. - Answers fast, inexpensive, and
reliable. Could see up to 10,000 on a car.
