No, this is not correct. Low voter turnout usually favors the union – which is why union supporters may try to discourage you from voting. The outcome of the election will be determined by a simple majority of those who vote (50% + 1 vote).

For example, if there are 50 nurses eligible to vote, but only 30 vote – and 16 of those vote for the union – then the union would win the election and the right to speak for all 50 nurses who were eligible to vote.