Revision Emergency Circuit/TECHAV

Question 1

What does the TECHAV stand for

Answer 1

Trip
Emergency application valve
Control governor
Hand and foot operated pilot valve
Anti-neutralisation device
VICERS

Question 2

If the EC is turned to isolate, what equipment is introduced (4 answers)

Answer 2

Foot operated pilot valve
Emergency pilot valve
Emergency control governor
Control governor by-pass button

Question 3

When on the secondary circuit, how do you charge the BP

Answer 3

By pressing the control governor by-pass button after 30sec

Question 4

What is the timing cycle of the Governor by pass button

Answer 4

Begin to flash after 30 sec, for 10sec. After 40 sec emergency breaks will apply

Question 5

What would happen if the contol governor button is not pressed and where from

Answer 5

After 40sec the emergency brakes will apply

Question 6

What does the control governor bypass do

Answer 6

It replaces the VICERS once the red EC cock is turned

Question 7

What pressure does the control gov open

Answer 7

310 - 340 kPa

Question 8

At what pressure does the control gov close

Answer 8

400 - 430 kpa

Question 9

What does the the anti-neutralisation device do

Answer 9

Prevent reverser being put into neutral or off, above 8km/h

Question 10

If changing ends after having bypassed the primary safety apparatus, what must you do

Answer 10

You must instate the yellow TECHAV cock at the non drivers cab instead of the red EC