How is the ice removed from the evaporator of a flake ice machine?

How is the ice removed from the evaporator of a flake ice machine?
 
  A) A harvest cycle using hot gas bypass
  B) The evaporator is Teflon coated so the ice slides right off.
  C) A slow-turning spiral-fluted auger cracks the ice off.
  D) The flexible mold is twisted until the ice releases.

 Q. 2

What does the technician normally do when installing a gas vent on a rooftop packaged unit?
 
  A) an approved double wall vent is piped away from the unit to the side of the roof
  B) an approved single wall vent is piped at least 3 feet above the top of the unit
  C) the manufacturer supplied hood is screwed onto the unit
  D) a vent hood is only needed if the unit is installed inside

 Q. 3

What type of blower configuration requires a water-filled P-trap to ensure proper condensate draining?
 
  A) Draw through evaporator with blower downstream
  B) Blower configuration does not affect drainage
  C) Push through evaporator with blower upstream
  D) No P-trap is needed on rooftop installations