Yes, 1:1 ratio of sugar and water to feed when you are wanting them to build comb and grow. I know of a beekeeper who feeds 2 water to one sugar, giving a thinner feed. His thinking is that he's saving money on sugar, and the increased volume forces the bees to build even more comb to put the syrup, so they can get it to evaporate down to a thickness they wanted. I tried this, but they just seemed to go through it that much faster.
In the fall, if you need to supplement their stores going into winter, it's 2:1 (two sugar to one water).
Something I've been doing this year is mixing right in the mason jars I use. I pour the sugar in the jar, then pour in hot (not boiling) water, and mix with a wooden spoon. I then top off with cold water. Very handy for me. I haven't tried this with 2:1 yet.