Safety apparatus + Red/Yellow cocks

Question 1

What are the six primary safety apparatus that are isolated by the Red EC/Yellow TECHAV cocks?

Answer 1

Trip - missing or won’t reset
Emergency application valve - won’t reset
Control governor - won’t close
Hand and foot pilot valves - won’t reset
Anti-neutralisation device
VICERS activation valve - won’t reset

Question 2

When should you use the Red EC cock to isolate equipment instead of the Yellow TECHAV cock?

Answer 2

Red used in the motor being driven from (leading motor unless rescue)
Yellow used in any other car

Question 3

What are the secondary safety apparatus?

Answer 3

Foot operated pilot valve
Emergency pilot valve

Emergency control governor
Control governor (C.G) bypass button

Question 4

In what timing pattern does the Control Governor bypass button flash?

Answer 4

Every 30 seconds for 10 seconds before activating

(Activates after 40 seconds)

Question 5

What does the Red EC cock do once turned?

Answer 5

Two way - once turned redirects brake pipe air from primary safety apparatus to secondary safety apparatus

Question 6

What should you do before turning the Red EC cock?

Answer 6

Ensure brake pipe is empty (put into emergency) to avoid your eardrums being exploded by the air release

Question 7

What does the Control Governor do?

Answer 7

Stops you from powering if the brake pipe pressure gets down to 310-340kPa (ie. to prevent powering and braking at the same time)

opens at 310-340kPa
closes (allows powering again) at 400-430kPa