Comeng Braking systems and Running Brake Tests

Question 1

When must a driver perform a running brake test?

Answer 1

Driver changes over (is relieved)
Direction of travel has changed
Train consist has been altered

Question 2

Name the running brake tests applicable to the Comeng

Answer 2

Low speed running brake test
Service brake test
Automatic air brake test

Question 3

Where can you not do an automatic air brake test?

Answer 3

Inner suburban area

Question 4

What is the maximum speed for a train to enter a platform to stop?

Answer 4

55km/h

Question 5

What happens to the valves when the handle goes into emergency?

Answer 5

Charging valve closes, emergency exhaust valve opens

Question 6

What model of comeng does not have wheel slip protection during automatic air braking?

Answer 6

Westcode

Question 7

What happens if you drop the foot or hand pilot valve during auto air brake application?

Answer 7

The brakes WILL release

Question 8

If the brake handle has been put into emergency, is it permissible to remove it from that position?

Answer 8

No

Question 9

For a low speed running brake test, what speed must this test be conducted?

Answer 9

Under 15km/h

Question 10

What is the protocol if a low speed running brake test and service running brake test fail?

Answer 10

The train is to be ran on automatic air and the train controller to be informed ensuring a TMM is completed

Question 11

What is the protocol if the automatic air brake test fails?

Answer 11

The train must be run on the EP brake at no faster then 15km/h to the first siding and train control the informed with a tmm completed

Question 12

Is it permissible to conduct an automatic air brake test in the inner suburban area?

Answer 12

No

Question 13

How do you do a running brake test on the auto air?

Answer 13

Minimum application then pushed up to 150KPA, brake is released then caught at 100KPA

Question 14

What is the release prevention valve?

Answer 14

Only used on automatic air brake, it prevents main res air to enter the regulating valve when the brake is being used. Ensuring the brake will be released when in run and release

Question 15

What is the regulating valve?

Answer 15

When BVIC is opened takes main res air and Regulates how much air goes into the brake pipe via the equalising res and has a pressure of 380-410 during full service application and 550kpa in run and release

Question 16

What is a relay valve?

Answer 16

Controls the flow of air into and out of the brake pipe to a pressure set by the equalising res

Question 17

What is the equalising res?

Answer 17

The pressure in the equalising res determines the overall pressure in the brake pipe. Used predominately for automatic air