This achievement is somewhat luckbased. I'll mention how I got this achievement. This strategy is nowhere near consistent. If someone else finds a consistent strategy please share. I might find a better one myself.
In order to complete the level, there are 5 turnables that you HAVE to turn off. This are the 2nd to 6th turnables in the back row. I'll name these 1, 2, 3, 4, 5 from left to right.
Immediately at the start, turn off number 3, this will make the middle penguin bump into an imposter. Then make sure to turn off number 2 before the imposter in the center has stepped onto this turnable 2. The next bit is where you have to be lucky. Both penguins have to land on the right-hand side, without one being bumped off. Be ready to turn off number 5 once one of them is approaching the exit. At all times, do not turn off number 4. If all went well (which as mentioned, might take a lot of tries. I've been trying things for over half an hour.), turn off number 1 once the imposter is about to go in the direction of the line of turned off turnables. Both the imposter and the penguin should be going in the direction of the exit. Since number 4 is turned on still, the imposter should go to the side. Immediately afterwards, turn number 4 off.
I just realised that it says only turn off 5 of them, so if someone wants to try the easy method and turning off 5 and then turning on 1 to see if that works.