AMS 263 EXAM QUESTIONS 100% CORRECT ANSWERS
VERIFIED ANSWERS
1. In some aircraft with several fuel tanks, the possible danger of allowing
the fuel supply in one tank to become exhausted before the selector valve is
switched to another tank can be prevented by the installation of Ans >> a fuel
pressure warning system
2. A fuel pressure warning switch contacts close and warning light is turned
on when Ans >> the fuel pressure drops below specified limits
3. What is the purpose of a float-operated transmitter installed in a fuel tank
Ans >> It sends an electric signal to the fuel quantity indicator
4. If an older rubber bladder-type fuel tank is to be left empty for an extended
period of time, the inside of the tank should be coated with a film of Ans >>
Ans >> engine oil
5. What is normally marked at or near each appropriate fuel filler cover for
reciprocating engine-powered airplanes Ans >> avgas and minimum fuel
grade
6. What unit is generally used to actuate the fuel pressure warning system An
>> -
Pressure-sensitive mechanism
7. Why is it necessary to vent all aircraft fuel tanks Ans >> To limit pressure
differential between the tank and atmosphere
8. An electrical-type fuel quantity indicting system consists of an indicator in
https://www.stuvia.com/user/Mboffin 1/
12
, the cockpit and a Ans >> float operated transmitter in the tank
9. what is the recommended practice for cleaning a fuel tank before welding-
Ans >> Steam clean the tank interior
10. What is the primary purpose of the crossfeed system Ans >> to allow the
feeding of any engine from any tank
11. Why is the main fuel strainer located at the lowest point in the fuel system-
Ans >> It traps any small amount of water that may be present in the fuel system
12. Which gas is used for purging an aircraft fuel tank Ans >> carbon dioxide
13. Which of the following is a definition of a heavy seep Ans >> area of 3.5-4
inches
14. Fuel system components must be bonded and grounded in order to Ans
>> drain off static charges
15. What type of fuel booster pump requires a pressure relief valve Ans >> sliding
vane
16. How does temperature affect fuel weight Ans >> cold fuel is heavier per gallo
17. One advantage of electrical and electronic fuel quantity indicating systems
is that the indicator Ans >> can be located any distance from the tank(s)
18. when installing a rigid fuel line 1/2 inch in diameter, at what intervals should
the line be supported Ans >> 16 inches
19. Which of the following may be used for the repair of fuel leaks on most
integral fuel tanks Ans >> riveting and resealing
https://www.stuvia.com/user/Mboffin 2/
12
VERIFIED ANSWERS
1. In some aircraft with several fuel tanks, the possible danger of allowing
the fuel supply in one tank to become exhausted before the selector valve is
switched to another tank can be prevented by the installation of Ans >> a fuel
pressure warning system
2. A fuel pressure warning switch contacts close and warning light is turned
on when Ans >> the fuel pressure drops below specified limits
3. What is the purpose of a float-operated transmitter installed in a fuel tank
Ans >> It sends an electric signal to the fuel quantity indicator
4. If an older rubber bladder-type fuel tank is to be left empty for an extended
period of time, the inside of the tank should be coated with a film of Ans >>
Ans >> engine oil
5. What is normally marked at or near each appropriate fuel filler cover for
reciprocating engine-powered airplanes Ans >> avgas and minimum fuel
grade
6. What unit is generally used to actuate the fuel pressure warning system An
>> -
Pressure-sensitive mechanism
7. Why is it necessary to vent all aircraft fuel tanks Ans >> To limit pressure
differential between the tank and atmosphere
8. An electrical-type fuel quantity indicting system consists of an indicator in
https://www.stuvia.com/user/Mboffin 1/
12
, the cockpit and a Ans >> float operated transmitter in the tank
9. what is the recommended practice for cleaning a fuel tank before welding-
Ans >> Steam clean the tank interior
10. What is the primary purpose of the crossfeed system Ans >> to allow the
feeding of any engine from any tank
11. Why is the main fuel strainer located at the lowest point in the fuel system-
Ans >> It traps any small amount of water that may be present in the fuel system
12. Which gas is used for purging an aircraft fuel tank Ans >> carbon dioxide
13. Which of the following is a definition of a heavy seep Ans >> area of 3.5-4
inches
14. Fuel system components must be bonded and grounded in order to Ans
>> drain off static charges
15. What type of fuel booster pump requires a pressure relief valve Ans >> sliding
vane
16. How does temperature affect fuel weight Ans >> cold fuel is heavier per gallo
17. One advantage of electrical and electronic fuel quantity indicating systems
is that the indicator Ans >> can be located any distance from the tank(s)
18. when installing a rigid fuel line 1/2 inch in diameter, at what intervals should
the line be supported Ans >> 16 inches
19. Which of the following may be used for the repair of fuel leaks on most
integral fuel tanks Ans >> riveting and resealing
https://www.stuvia.com/user/Mboffin 2/
12
