Design for Manufacturability Test
Identify the advantages of sand castings over die castings from the points given below.
a. Sand castings can vary greatly in wall thickness, whereas die castings have a uniform wall thickness.
b. Sand castings have better surface finish than die castings.
c. Sand castings are wider in gauge than die castings.
d. A mold can be reused in case of sand castings, but not in case of die castings.
e. Sand castings are stronger than die castings by virtue of the material used.
f. Sand castings have higher production rates than die castings.
Which of the following powder shapes is likely to have the lowest interparticle friction?
Which of the following formulas helps determine the minimum form height for sheet metal use if D, T and R are given as minimum distance, material thickness and bend radius respectively?
a. R = 1.5T + D
b. T = D + R
c. D = 2.5T + R
d. 5T = R – 1.5D
Groove welds are related to which of the following joint types?
In analyzing alternate methods for producing a product, design and manufacturing engineers are faced with cost variables that relate to ______.
a. direct labor
c. indirect labor
d. special tooling
e. All of these
Which one of the following rapid prototyping technologies uses solid sheet stock as the introductory material?
b. Fused deposition modeling
c. Solid ground curing
d. Laminated object
In which plastic shaping process is parison formed?
a. Compression molding
b. Blow molding
c. Sandwich molding
d. Pressure thermoforming
Sheet metal working operations are mainly carried out as:
a. hot working
b. warm working
c. cold working
d. None of these