Question

fff: bridging
use the information below to answer the question.
in 3d fff design, a bridge is a design technique that helps minimize or reduce support structure by spanning the space between two points. the distance may vary from one manufacturer to another, but the general rule of thumb is 1cm. if the print doesnt work the first time using the default settings, there are a few things to adjust in the slicing software.
fan speed
the first thing to do is increase the fan speed. increasing the fan speed will solidify the molten polymer more quickly, building the structure as it goes. this will increase the possibility of the bridge working the first time.
temperature
to increase the viscosity of the molten polymer, reduce the temperature by about 15 degrees. this will make the polymer thicker.
print speed
a user can slow down the rate at which the print head is moving. a user can also slow down the rate at which the filament is going into the nozzle. less material will get pushed out, so it is less likely to harden before it gets to the other side.
in terms of temperature, how many degrees should a user reduce it to increase the viscosity of the molten polymer?
6 degrees
20 degrees
32 degrees
15 degrees

Explanation:

The text under the "Temperature" section explicitly states that reducing the temperature by about 15 degrees increases the viscosity of the molten polymer.

Answer:

15 degrees