Timing / Timelines/ Timer (Captivate)

If you execute this JavaScript on slide enter of the first slide of a quiz, slide 8 and slide 42, it will prompt the student to exit oe restart the course. If you want to change the button text you would need to use jQuery UI do create a custom dialog box.

var myTImer = setTimeout( myFunction, 60000 );

function myFunction()
{
clearTimeout( myTimer );

var res = confirm( "Your alloted time for this quiz has expired. Press OK to exit the course or Cancel to restart the course." );

if ( res == true )
{
     window.DoCPExit();
}
else
{
     window.cpCmndGotoFrameAndResume = 1;
  }
}

Forget about the Timer/Hourglass interactions if you want timing only in specific slides. Moreover the behavior of those interactions depend on the output: different for HTML5 and SWF. You didn't specify which output you want?

I have created that type of timing for clients, based on the use of the system variables cpInfoEpochMS and/or cpInfoElapsedTimeMS in combination with a user variable and advanced/shared actions. Beware: since actions need an event to trigger (like On Slide Enter), the time limit will only be approximate. However that is also the case with the interactions. To have an idea of what I mean, have a look at these old posts:

Display Time information - Captivate blog

Timer widget... to stress your learners - Captivate blog

Captivate itself has no default way to do something like this.  (From your description it sounds like you were setting the SCORM timing functionality which only works from the start of the actual SCO module.)

You do have a Timing widget in the Learning Interactions, and that is a Static widget which can be timed for Rest of Project and then Hidden by Advanced Actions.  But it's quite limited in functionality.  You should play with some of the options to see if it would suffice for your needs.  It does have the ability to time a quiz, but not work separately for two groups of questions that belong to the same quiz.