HF ATL: If you can work through answering a couple of questions, you'll not only have your answer, but also some understanding that will never leave you!
Here goes.
Sitting still on the runway at SL, the throttle is pushed full forward (open). What will the RPM stabilize at? (static RPM)
With the throttle still full open, you level off at 1,000' MSL. At what RPM will it stabilize now?
At full throttle, RPM will vary according to propeller load. Propeller load varies with prop blade AOA and higher AOA increases prop load.
Why does the RPM increase during the takeoff roll?
Bonus question: Does the engine produce the same HP at 2,350 RPM and full throttle as it does at 2,650 RPM and full throttle? Assume very similar density altitude for the purpose of these questions.
Pro study tip:
First, read the textbook! Then commit to your answers on the practice exam. Then try and find them in the textbook. Modify your answers as needed after reading textbook. Now answer the practice exam questions again. This is a well proven method of gaining knowledge that may have been missed on the first reading of the textbook or other source material.
Best of success!