Answer:
Through the suspenseful mood
Step-by-step explanation:
This is a passage, where the author wants to emphasise the suspenseful mood. In literature, suspense is the anticipation of the outcome of a plot or of the solution to an uncertainty, puzzle, or mystery.
Even though the description is about unscrewing of the cylinder, the writer descriptevely prolongs it by describing every little detail, which creates sensation of suspense in a reader.