typically before you begin your exam it tells you on the screen what's the maximum points you can get for that exam and underneath each question it shows how much points you are awarded for that particular question.
for example in Gen nav there are 60 questions but the maximum point count you can get is 78 (or thereabouts). Most questions are worth 1 point, some are 2, and you might get one or two 3 point questions.
Different subjects have it differently, for example Instruments had 60 questions with 60 point maximum, meaning each question was worth 1 point