Large Aircraft Systems M2

Question 1

How are most aircraft tanks vented?

Answer 1

Most aircraft tanks are vented to vent surge tanks located on the outboard ends of wings

Question 2

What is the purpose of surge tanks?

Answer 2

Provides space for thermal expansion

Question 3

How many collector tanks are located in the CRJ 700?

Answer 3

Two collector tanks in the centre tank

Question 4

How do the tanks vent on the CRJ 700?

Answer 4

All tanks vent to the centre tank.

And positive pressure relief valves open above 5psi tank press.

Question 5

How do you defuel a CRJ 700?

Answer 5

Suction defueling can be carried out the same service panel

Gravity Defueling also available through fuel drain valves but is much slower

Question 6

What is the Auto Function for fuel transfer on the CRJ?

Answer 6

Transfer SOV(Shut off Valves) open to allow motive flow to transfer fuel from the centre tank to the two main tanks through two transfer ejectors.

A balancing system operates to balance the fuel between the two wing tanks.

• One operation is with a x-flow pump, the other is gravity balanced with an x-flow valve

Question 7

What are the fuel control switches and where are they located?

Answer 7

• The only control switches are on the overhead panel
  
  • The controls are for the electric boost pumps (starting and backup) and for fuel balancing between L&R main tanks

Question 8

Where is fuel on board indicated?

Answer 8

Bottom right corner of the EICAS page