Land immediately is now removed from Bell's Flight Manuals because people landed immediately in some stupid places. The examiner is wrong - why put yourself in a position where you have no choice? If the light has only just come on, there's plenty of time to find somewhere within a couple of minutes.
As an examiner myself I ask the same question, within the context of having plenty of fuel a few moments ago, but not now, hence an emergency. Low fuel under other circumstances is bad planning and I would have probably asked more relevant CRM questions in that area instead.
3top - in the US you can go into your legal minimum - Considering wind and forecast weather, under VFR, you must start with enough fuel on board to fly to the first point of intended landing and, at normal cruising speed, after that for at least 30 minutes (45 at night, 20 for rotorcraft). There's nothing to say you have to land with it, unlike JAA. That's what it's for.
Phil