During ignition check the ignition is switched to OFF for a short moment and subsequently back to BOTH. What happens to the RPM if the ignition system is properly grounded?

Question

Question PPL(A) - Private Pilot License - Aircraft General Knowledge

QuizVDS · Accepted Answer

The RPM decreases once switched to OFF and resumes the previous value when switched back to BOTH

QuizVDS · Answer

The RPM increases once switched to OFF and resumes a value below the previous one when switched back to BOTH

QuizVDS · Answer

The RPM increases once switched to OFF and resumes the previous value when switched back to BOTH

QuizVDS · Answer

The RPM decreases once switched to OFF and resumes a value below the previous one when switched back to BOTH

Id 70 - PPL(A) EN - During ignition check the ignition is switched to OFF for a short moment and subsequently back to BOTH. What happens to the RPM if the ignition system is properly grounded?