Xtrapolis - Pneumatics and Brakes

Question 1

Where is compressed air distributed too?

Answer 1

Two air compressors
Compressor governor
Compressor governor isolating cock
Air dryers
Main res
Auxiliary res
Main res pipe
Auxilary pneumatic panel
Brake pipe (train rescue only)

Question 2

At what kpa will both compressors turn on?

Answer 2

Main res drops below 650kpa

Question 3

At what pressure does one compressor stop working?

Answer 3

750 - 900kpa

Question 4

What happens when you turn the compressor governor isolating cock?

Answer 4

The compressor will stay on if it is already on and stay off if it is already off

Question 5

At what pressure does the safety valve relieve pressure?

Answer 5

980kpa

Question 6

What does the main res pipe connect too?

Answer 6

Aux res (Mc + Tc)
Aux pneumatic panel
Coupler
Spring park brake

Question 7

Name the isolating cocks in the auxiliary pneumatic panel

Answer 7

Whistle
Auto coupler
Trip reset
Trip gear
Auxillary panel

Question 8

When will brake cylinder pressure be sighted?

Answer 8

During wheel slide (Ed is removed)
Emergency mode switch to position 1 (inhibit the holding brake)
Below .5km threshold

Question 9

What pressure is the Full Service brake cylinder pressure?

Answer 9

190kpa

Question 10

What brakes are equips to a motor car?

Answer 10

ED and ep (block and disc) and spring park brakes

Question 11

What is holding brake pressure?

Answer 11

120kpa

Question 12

During normal operations, what speed does brake blending occur?

Answer 12

Between 5km - 10km

Question 13

What speed does the Ed brake drop out completely?

Answer 13

5kn/h

Question 14

Can brake blending happen at any speed?

Answer 14

Yes when taking in to account load, weight and demand

Question 15

What is the emergency brake cylinder pressure?

Answer 15

210kpa

Question 16

Where are spring park brakes located on an Xtrapolis?

Answer 16

Wheels 1,3,7 on motor cars only

Question 17

What key do we need to access the park brake manual release?

Answer 17

AX key

Question 18

When rescuing, what pressure should the brake pipe charge too?

Answer 18

550kpa

Question 19

At what brake cylinder pressure does the safety loop de energise when rescuing?

Answer 19

300KPA

Question 20

At what brake pipe pressure does the safety loop close?

Answer 20

430kpa

Question 21

When using emergency mode switch in position 3,4 or 5, what KPA is needed to obtain traction power?

Answer 21

480KPA

Question 22

Name the brake systems?

Answer 22

Service brake
Holding brake
Emergency brake
Spring park brake

Question 23

What type of brakes are service brakes?

Answer 23

ED

EP

Question 24

What EP braking does the motor car have?

Answer 24

Disc and tread

Question 25

What ep braking does the trailer cars have?

Answer 25

Tread

Question 26

At what speed does the holding brake apply?

Answer 26

.5km/h

Question 27

What is optimum main res pressure?

Answer 27

750kpa - 900kpa

Question 28

At what main res pressure does safety loop open?

Answer 28

580kpa

Question 29

At what main res pressure does the safety loop close?

Answer 29

650kpa

Question 30

When is holding brake released?

Answer 30

When traction power is applied

Question 31

When does the spring park brake apply?

Answer 31

On depletion of main res air

Question 32

Can spring park brakes be released manually?

Answer 32

Yes

Question 33

At what settings is brake pipe introduced on the ems?

Answer 33

3-Rescued
4-Rescuing
5-Rescuing during propulsion