I didn't have any nasty surprises; my CPL test was pretty much as I was told it would be (and similar to my 170A).
However, in case you don't do this; make sure you know what numbers are on the gauges (Ts & Ps). I had the examiner cover the oil pressure and ask me what it was reading.
Couple of questions (quite straight-forward) during the daily inspection.
He's not there to fail you or to catch you out but to ensure that you are safe and competent in conducting a revenue earning flight.
Cheers
Whirls