Hello Walter,
Thank you for your questions.
Based on our experience and feedback provided by the people who took their exam, the questions are between 2 to 7 lines long (with some exceptions). However, the PMP exam is constantly evolving. This means that prospective PMP aspirants who plan to take their exam may see questions that will be longer (or shorter) than the questions that were given to the recent exam takers. As part of the continuous improvement effort, we are constantly updating our questions to make them as close as possible to the real exam, while at the same time keeping some variety of questions to make sure our valuable customers are ready for any possibilities and are better prepared for THE day.
Regarding the content of the exams - yes, we try to maintain the same level of difficulty across all eight exams.
Hope this helps.
Best of luck in your preparations.