Ответ:

  1. There is a new robotic arm in the workshop. It moves very precisely.
  2. There are several error codes on the screen. It is difficult to fix all of them at once.
  3. It is 5 km from the factory to the training center. It takes 10 minutes by car.
  4. There is no cooling fluid left. Can you check it?
  5. It is raining heavily, so it is a good idea to check the outdoor wiring.
  6. There are three welding techniques we learned. One was very useful.

Примечание: в последнем предложении естественно употребить “One”, хотя на фотографии, вероятно, требуется выбрать только “it” или “there”.