Did you mean to say you can activate the switches with one hand simultaneously? That is probably what the above commenter assumed you meant. Since lifting and twisting two switches simultaneously with one hand seems challenging.
joey: Can you switch them quickly?
snypher: You can do them with one hand. [Ed. This is ambiguous and could be read as "one hand, simultaneously". In fact, doing it with one hand non-simultaneously would be a weird claim to make of a simple knob. See also ajb's comment below.]
zihotki: Really? They are not close together and have a spring mechanism. [Ed. Seems to believe snypher is claiming simultaneous operation.]
snypher: I am confused by the response.
Me: [Tries to facilitate clarification]
Not within the context of the thread.
It would. So would switching both quickly in succession. One second is a long time—I can adjust power, prop, fuel pump and flaps in about that time.