Refer to the link for the new questions, the older questions with the answers are listed below.
http://www.nzta.govt.nz/resources/roadcode/heavy-vehicle-road-code/theory-test-questions/specialist-questions-heavy-vehicles.html

 Good Luck!

1. What is the maximum width permitted for a heavy trailer (other than an agricultural trailer) from it's longitudinal centre line?

   		1 metre.
   		1.25 metres.
   		2 metres.
   		2.5 metres

    
2. What is the maximum speed limit on the open road for a vehicle towing a heavy full trailer?

   		70 km/h.
   		80 km/h.
   		90 km/h.
   		100 km/h.

       
3. No person shall operate a full trailer that exceeds 3,500kgs in gross weight if it's rear overhang exceeds:

   		3.2 metres or exceeds 70% of the wheel base.
   		4.0 metres or exceeds 60% of the wheel base.
   		3.2 metres or exceeds 50% of the wheel base.
   		4.0 metres or exceeds 50% of the wheel base.

     
4. What is the maximum distance a load may extend behind the body of a trailer before an over-dimensional flag is required?

   		0.5 metres.
   		1.0 metres.
   		1.5 metres.
   		2.0 metres.

    
5. Where must the road user licence for a heavy trailer be displayed?

   		On the front left-hand side of the trailer or inside the windscreen on the passenger's side of the towing vehicle.
   		On the front right-hand side of the trailer or inside the windscreen on the driver's side of the towing vehicle.
   		On the rear left-hand side of the trailer or on the rear of the towing vehicle near the registration plate.
   		On the rear right hand side of the trailer or on the rear of the towing vehicle on the passenger's side.

     
6. Where on a heavy trailer should a Warrant or Certificate of Fitness be displayed?

   		On the front of the towing vehicle.
   		On the front of the trailer.
   		On the rear of the trailer near the registration plate.
   		On the rear of the towing vehicle near the registration plate?

      
7. What is the forward distance of a full trailer (other that a pole trailer). the front axle of which is steered by a towbar?

   		The distance from the rear axis to the front of the trailer (excluding the drawbar and the front axle set) or its load whichever is foremost.
   		The distance from the rear axis to the front of the trailer (including the drawbar and the front axle set) or its load whichever is foremost.
   		The distance from the rear axis to the point of the attachment to the towing vehicle.
   		The distance from the rear axis to the front of the towing vehicle.

    
8. What is the maximum speed limit on the open road for a vehicle towing only a semi-trailer or semi-trailers.

   		80 km/h.
   		90 km/h.
   		100 km/h.
   		110 km/h.

    
9. Between which points is the forward distance of the trailing portion of an articulated combination measured?

   		From the rear axis of the trailer to its point of attachment to the towing vehicle.
   		From the rear axle of the trailer to its point of attachment to the towing vehicle.
   		From the rear axle of the trailer to its connecting point.
   		From the rear axle of the trailer to it's foremost point.

    
10. What is the maximum distance a load may extend out from the side of the body of a trailer before an over-dimensional flag is required?

    		200 mm.
    		250 mm.
    		300 mm.
    		350 mm.

      
11. What is the maximum permitted forward distance of a semi-trailer?

    		7.4 metres.
    		8.5 metres.
    		9.3 metres.
    		10.2 metres.

      
12. From what distance must the rearward facing red side lamp of a large Goods Service Vehicle parked at night be visible in clear weather on a 50 km/h area?

    		25 metres.
    		50 metres.
    		70 metres.
    		100 metres.

     
13. From what distance must the rearward facing side lamp of a large Goods Service Vehicle parked at night be visible in clear weather in a 100 km/h area? 

    		100 metres.
    		150 metres.
    		200 metres.
    		250 metres.