Fuel System

Question 1

.What happens when all the fuel in an auxiliary tank is pumped to the main tank and consumed?

Answer 1

AUX pump will automatically turn off and supply CAAS with an advisory for the associated tank

Question 2

What keeps fuel loss and post-crash fires to a minimum by breaking or shearing at predetermined locations and sealing themselves to retain fuel?

Answer 2

Breakaway self sealing fittings

Question 3

What is installed in each tank to prevent fuel spillage from the vents should the helicopter roll over following a crash landing?

Answer 3

Roll-over Vent System

Question 4

How is an Engine Fuel Valve opened or closed electronically?

Answer 4

Fire Pull Handles

Question 5

If the engines are running, CAAS will activate a FUEL LVL caution at ______pounds in the event the fuel quantity low level warning system has failed (internal fuel tank sensors).

Answer 5

<360 lbs for more than 2 seconds

Question 6

ENG 1/2 FUEL PRESS LO caution(s) activate when fuel pressure in the respective line is below what?

Answer 6

10 psi +/- 1 psi

Question 7

The fuel flow display on the fuel page of the MFD will flash when fuel flow is equal to or greater than ___________ pounds.

Answer 7

2,995 lbs

Question 8

What is the purpose of the jet pump system within each main fuel tank?

Answer 8

To remove the fuel from the cross over line and inner-tank manifolds after single point pressure refueling

Question 9

How is the jet pump system activated?

Answer 9

By turning on the respective main tank pumps on the overhead sw panel

Question 10

What two fuel system related switches are monitored by the Cockpit Voice and Flight Data Recorder (CVFDR) for position?

Answer 10

X-FEED and Main Fuel Pump sw’s

Question 11

What should be avoided if both boost pumps should fail in either main fuel tank with the XFEED open and a low fuel indication?

Answer 11

Nose low attitude in excess of 5 degrees

Question 12

What is the max capacity for fuel in the CH47F?

Answer 12

6,887.6 lbs
1028 gallons

Question 13

If an aux fuel pump fails during normal flight, will that fuel still be usable

Answer 13

No. It becomes unusable

Question 14

Where does the APU get its fuel

Answer 14

left main fuel tank

Question 15

Where does the heater get its fuel

Answer 15

right main fuel tank

Question 16

Engine fuel valves and XFEED valves can be operated _____ or ______

Answer 16

electrically or mechanically

Question 17

What happens when all the fuel in an auxiliary tank is pumped to the main tank and consumed?

Answer 17

AUX pump will automatically turn off and supply CAAS with an advisory for the associated tank

Question 18

How is an engine fuel valve closed or opened manually

Answer 18

a lever on the valve

Question 19

Can fuel be transferred between tanks through the XFEED system

Answer 19

No. XFEED system feeds engines directly

Question 20

3 conditions that cause the engine or XFEED fuel valve warning lights to illuminate

Answer 20

1. During normal operations (open to close, close to open, fire pull handle)
2. When a short circuit occurs
3. When the valve protection relay fails

Question 21

How is the Fuel Screen pages accessed on the MFD

Answer 21

T6 key when on INST

Question 22

During pressure refueling, the max fueling rate is ____ gallons per minute at ____ psi

Answer 22

300
55 psi

Question 23

how is electrical power supplied to the refuel station

Answer 23

via the refuel station switch on the Fuel Control Panel on the Overhead Switch Panel

Question 24

If a REFUEL VALVE POSN indicating light remains illuminated when power is removed from the refuel station during rapid refuel operations, what will be the mission status of the fuel in the associated Aft AUX fuel tank?

Answer 24

Unusable