i would have smacked if face, if the hand brake failed because he used it incorrectly how could he mark it as a fail
That is the correct method if using a decelerometer thingymawotsit.
BRAKE PERFORMANCE (DECELEROMETER TEST)
INFORMATION
AREA USED FOR DECELEROMETER BRAKE TESTING
The requirement for a steady speed during a brake test by decelerometer means that the
vehicle must always be driven on an area which:
a. Has a good surface,
b. Is suitable for brake tests when dry or wet,
c. Has a minimum of traffic.
TESTING TRANSMISSION HANDBRAKES
When using a decelerometer to test a transmission handbrake, keep the ratchet
disengaged for as long as the brake is applied. Take the efficiency reading without the
occurrence of transmission snatch or judder.
VEHICLES WHICH JUST PASS
With some vehicles, the required brake efficiency is just obtained or just exceeded, but the
examiner knows that a higher performance figure is normally obtained for the type of
vehicle. Although the vehicle has passed the brake performance test, the examiner should
advise the vehicle presenter that the braking system appears to need adjustment or repair.
METHOD OF INSPECTION
DECELEROMETER TEST
1. If the vehicle is of a type which cannot be tested on a roller brake tester:
Set up the decelerometer in the vehicle in accordance with the equipment
manufacturers instructions,
Drive the vehicle on a level surface at a steady speed of approximately 20 mph
(32 kph) and note the brake efficiency recorded when applying only
i. the service brake,
ii. the parking brake,
iii. secondary brake if approperate,
2. While the vehicle is decelerating under the action of the service brake, note if the
steering wheel tends to pull or the vehicle tends to swerve.
3. while the vehicle is decelerating under the action of the parking brake note if the
vehicle tends to swerve excessively.
4. If half the number of wheels on a brake system lockup then it is assumed that the
efficiency requirements are met.
REASON FOR REJECTION
1. The service brake efficiency recorded on the decelerometer does not meet the
requirements specified in the Brake Efficiency Table.
2. The parking brake efficiency recorded on the decelerometer does not meet the
requirements specified in the Brake Efficiency Table
3. When the service brake is applied:
a. There is a service grab or judder, or
b. There is a severe pull one way on the steering wheel, and/or
c. The vehicle swerves appreciably
4. When the parking brake is applied the vehicle swerves excessively from a straight
line.