A 'gotcha' with the Q400 is the sensitive lower end of the throttle quadrant and unsensitive upper end of the quadrant.
Eg flight idle to 30% Tq is a very small movement
50% Tq to the dentent (selected max power NTOP, MCL, MCR etc) is a much larger movement
Setting the power by 'sound and feel' at this lower end of the quadrant is out of the question with low hours on type.
Fully configured for landing a Tq setting of 14-30% is normal depending on the flap setting