A runway incursion can be an occurrence at an airport that results in a collision hazard or results in a loss of separation with an aircraft and:  
All of the answers are correct.  
 
One of the primary actions that can be taken to prevent runway incursions is to:  
Ensure you have received and understood all NOTAMs.  

The sterile cockpit should be used:  
All of the answers are correct.  

In the event that there are confusing or erroneous airport diagrams that have come to your attention they should be brought to the attention of:  
All of the answers are correct.  

SMGCS requires a low visibility taxi plan for any airport that has a takeoff or landing operation with less than:  
1200 RVR.  

Stopbars are required at intersections of an illuminated taxiway for operations less than:  
Answer :   600 RVR.  

If you notice a discrepancy between the condition of the stopbar or lead-on lights and the verbal clearance of the controller you should:  
Immediately come to a stop.  

Runway guard lights are:  
All of the answers are correct.  

Color and type of signal
Meaning with respect to aircraft on the surface

Meaning with respect to aircraft in flight
Steady green
Cleared for takeoff
Cleared to land

Flashing green
Cleared to taxi
Return for landing (to be followed by steady green at proper time)

Steady red
Stop
Give way to other aircraft and continue circling

Flashing red
Taxi clear of runway in use
Airport unsafe - do not land

Flashing white
Return to starting point on airport
Not applicable

Alternating red and green
Exercise extreme caution
Exercise extreme caution