DA-42 NG: Fuel SystemTechnical Specific — DGCA CPL practice questions
Question 1 of 14
The total usable fuel in the two main tanks is approximately:
All 14 questions — DA-42 NG: Fuel System
Technical Specific · DGCA CPL. The correct option is marked on each.
Q1. The total usable fuel in the two main tanks is approximately:
- A.2 × 15 US gal
- B.2 × 20 US gal
- C.2 × 25 US gal✓
- D.2 × 40 US gal
Why: About 50 US gallons usable in total for a standard aircraft.
Q2. The usable fuel in each optional auxiliary tank is approximately:
- A.2 × 13 US gal✓
- B.2 × 10 US gal
- C.2 × 20 US gal
- D.2 × 25 US gal
Why: The auxiliary tanks sit in the engine nacelles and are transferred into the main tanks by electric pumps.
Q3. The maximum permitted fuel quantity difference between the left and right main tanks is:
- A.5 US gal✓
- B.10 US gal
- C.5 litres
- D.10 litres
Why: A larger imbalance causes a lateral out-of-trim condition.
Q4. The fuel tanks are located:
- A.In the wings✓
- B.In the fuselage behind the cabin
- C.In the nose section
- D.In the tail cone
Why: An aluminium tank of three interconnected chambers in each wing.
Q5. How many low-pressure fuel pumps supply each engine?
- A.One
- B.Two, in parallel✓
- C.Three
- D.One shared between both engines
Why: Normally one runs; if it loses pressure the control unit switches automatically to the second.
Q6. Both fuel pumps should be switched ON:
- A.Only in the cruise
- B.For take-off and landing✓
- C.Only during engine start
- D.Never
Why: And any time a fuel pressure problem is suspected.
Q7. The three positions of each fuel selector valve are:
- A.ON, CROSSFEED, OFF✓
- B.LEFT, RIGHT, BOTH
- C.MAIN, AUX, OFF
- D.OPEN, TRANSFER, CLOSED
Why: A safety guard must be twisted to reach OFF, so it cannot be selected by accident.
Q8. With a fuel selector set to CROSSFEED, that engine draws fuel from:
- A.The auxiliary tank on the same side
- B.The auxiliary tank on the opposite side
- C.The main tank on the same side
- D.The main tank on the opposite side✓
Why: The purpose is to balance fuel during single-engine flight.
Q9. In the event of a right engine failure, to maintain lateral balance CROSSFEED should be selected on:
- A.The right fuel selector
- B.The left fuel selector✓
- C.Both fuel selectors
- D.Neither selector
Why: The live left engine then burns fuel from the right tank, using up the fuel in the wing that is no longer being drained.
Q10. Take-off is not permitted with a fuel selector in which position(s)?
- A.ON
- B.CROSSFEED only
- C.OFF only
- D.Both CROSSFEED and OFF✓
Why: Both CROSSFEED and OFF.
Q11. Before moving a fuel selector between ON and CROSSFEED you must ensure that:
- A.The aircraft is switched off
- B.The mixture is at idle cut-off
- C.The fuel pump is switched OFF✓
- D.The gear is down
Why: Running a fuel pump together with crossfeed can damage the high-pressure pump.
Q12. If one engine is inoperative, its fuel selector must be placed:
- A.ON
- B.CROSSFEED
- C.OFF✓
- D.In any position
Why: OFF.
Q13. An engine should be shut down using:
- A.The fuel selector valve
- B.The ENGINE MASTER switch✓
- C.The mixture control
- D.The electrical master switch
Why: Shutting down on the fuel selector can damage the high-pressure fuel pump.
Q14. The L/R FUEL LOW caution appears when the usable fuel in that tank falls to about:
- A.2 US gal
- B.4 US gal✓
- C.8 US gal
- D.10 US gal
Why: 4 US gal (± 1 US gal).