BLEVE

Question 1

In order for a BLEVE to take place the following four conditions must be present 

Answer 1

1. There must be a substance in liquid form.
2. The liquid must be in a confined container.
3. The confined liquid must be at a temperature above its normal boiling point at the time the container ruptures.
4. There must be container failure 

Question 2

What four things can cause contain your failure?

Answer 2

1.  Flame impingement.
2. Structural, container weakness
3. Failure or lack of proper relief valves.
4. Impact from derailment, falling, missiles from other containers. 

Question 3

🚩🚩2. Where does container failure typically originate in a BLEVE scenario?
a) Liquid space of the container
b) Vapor space of the container
c) Middle section of the container
d) Any part of the container

Answer 3

Vapor space of the container

Question 4

🚩🚩2. Where does container failure occur in a BLEVE scenario?
a) Liquid space of the container
b) Vapor space of the container
c) Middle section of the container
d) at the ends of the container 

Answer 4

at the ends of the container

Question 5

🚩🚩4. What is recommended for personnel safety regarding the ends of tanks in a BLEVE situation?
a) Stand directly in line with the ends of the tanks
b) Avoid being in line with the ends of the tanks
c) Walk alongside the ends of the tanks
d) Attempt to open relief valves on the ends of the tanks

Answer 5

Avoid being in line with the ends of the tanks

Question 6

❌🚩2. What type of protection do entry or proximity suits afford against fire effects and missiles?
a) Short-term protection against fire effects, but no protection from missiles
b) Long-term protection against fire effects and missiles
c) No protection against fire effects or missiles
d) Protection against missiles, but not fire effects

Answer 6

Short-term protection against fire effects, but no protection from missiles

Question 7

🚩🚩9. How large should the evacuation zone be in all directions?
a) 1,000 feet
b) 2,000 feet
c) 3,000 feet
d) 4,000 feet

Answer 7

3,000 feet

Question 8

❌🚩🚩🚩1. Where should water application be focused during fire control? **TQ
a) Anywhere on the tank surface
b) At the bottom of the tank
c) At the point of flame contact
d) At the vapor space

Answer 8

At the point of flame contact

Question 9

🚩🚩2. Which area should have priority during fire control efforts during a BLEVE? ** TQ
a) Bottom of the tank
b) Vapor space
c) Middle section of the tank
d) Tank shell

Answer 9

Vapor space (upper portion of the tank)

Question 10

🚩🚩🚩5. During a BLEVE incident, When is it appropriate to enter the fire area to extinguish the fire? ** TQ
a) Before establishing cooling streams
b) After extinguishing the flames completely
c) Only when effective cooling streams are established on the tank shell at points of flame contact
d) When visibility is completely clear

Answer 10

Only when effective cooling streams are established on the tank shell at points of flame contact

Question 11

🚩🚩3. What is considered the minimum flow rate for effectiveness during fire control efforts?
a) 100 gpm
b) 250 gpm
c) 500 gpm
d) 750 gpm

Answer 11

c) 500 gpm what priority given to the upper portion of the tank (Vapor space)