Question

pbf: benefits and limitations
use the information below to answer the question.
direct metal laser sintering is not necessarily the best process to use for everything
that is made of metal. it may be more cost - effective to make your piece in the
traditional method.
benefits

• the pieces are dense.
• it is good to use for projects that require complex geometry.
• it is repeatable.

limitations

• the machine has a large size and it is very expensive.
• it has a small build area. you may need to create the piece in two parts and combine it

at your convenience.

• it requires a lot of post - processing at the operator level: grinding off the support

structure, sanding, painting, etc.
in terms of the machine, which of the following is a
limitation of powder bed fusion (pbf)?
the machine has a large size.
the machine has a large print bed.
the machine requires very low temperatures.
the machine is very small.

Explanation:

The limitations section of the text mentions that the machine has a large size and is very expensive. Among the options, "The machine has a large size" aligns with this limitation. The other options either contradict the text (e.g., "The machine requires very low temperatures" - no such info in text about low temps, PBF involves sintering which is high - temp related in metal cases; "The machine is very small" - contradicts the stated large - size limitation) or are not mentioned as limitations (e.g., "The machine has a large print bed" - not stated as a limitation).

Answer:

The machine has a large size.