DRTS Heavy-Vehicle Theory case studies
DRTS Heavy-Vehicle Theory · Put your knowledge to work in context.
The DRTS Heavy-Vehicle Theory credential is a knowledge assessment for people who drive, or intend to drive, heavy vehicles such as rigid trucks, prime movers and heavy combinations on public roads. It is aimed at new heavy-vehicle drivers seeking a first theory clearance, at light-vehicle drivers moving up a class, and at experienced operators who need to demonstrate current road-rule and safety knowledge. The DRTS Heavy-Vehicle Theory case studies are 5 cases and about 4,005 words.
1Air Brake Pressure Loss on a Descent
You drive a 3-axle rigid tipper (GVM 26 t) loaded to 25.4 t, descending a 6 km continuous grade averaging 7%. The posted limit is 80 km/h but the grade has two unmarked bends.
925 words, about 5 min2Overheight Load and a Low Bridge
You are assigned a semi-trailer with a flat deck carrying a large prefabricated steel frame. The consignment note lists the frame as 4.1 m high on the trailer, and the trailer deck height is 1.35 m, so the combined height is 5.45 m.
614 words, about 3 min3Fatigue and the Schedule That Doesn't Fit
You are a long-haul driver on a roster that has you starting at 04:00 after finishing at 22:30 the previous night. Your log shows 6 hours 45 minutes of rest, of which about 5 hours was actual sleep.
803 words, about 4 min4Load Shift on a Roundabout
You are driving a B-double (prime mover plus two trailers) with a high centre of gravity: the lead trailer carries palletised goods stacked 2.8 m high, total mass 34 t on the lead and 22 t on the rear. The load was restrained with straps at the base only, and the pallets are not wrapped.
830 words, about 4 min5Defect Found Mid-Run: Brake Chamber Leak
You are 300 km into a 600 km run with a loaded 6-axle semi-trailer at 42 t GVM when you stop for a break. During your walk-around you hear a faint hiss near the left rear trailer brake chamber and see a small oil stain on the inside of the tyre.
833 words, about 4 min