BELL 412 - FUEL SYSTEM EXAM QUESTIONS WITH CORRECT ANSWERS LATEST UPDATE 2026

BELL 412 - FUEL SYSTEM EXAM QUESTIONS WITH CORRECT ANSWERS LATEST UPDATE 2026 What is the purpose of the airframe fuel System? A. To provide an independent fuel supply system for each engine B. To provide a common fuel supply system for both engines C. To sequence fuel consumption to minimize CG movement D. Both A and C - Answers Both A and C Which of the following fuels is for emergency use only? A. Jet A B. Jet B C. Aviation gas D. Diesel 2 - Answers Aviation gas What is the total fuel capacity of the basic airframe fuel system? A. 330.5 U.S. gallons B. 337.5 U.S. gallons C. 419 U.S. gallons D. 501 U.S. gallons - Answers 337.5 U.S. gallons During normal fuel system operation, what component(s) separates the two engine fuel supply systems? A. Check valves B. Fuel valves C. Cross feed valve D. Flow switches - Answers Cross feed valve What is the purpose of each fuel supply system pressure switch? A. To provide indications to its respective fuel pressure gauge B. To illuminate the BOOST PUMP caution light if a pump fails C. To open the cross feed valve if a boost pump fails D. Both B and C - Answers Both B and C Which statement best describes the FUEL VALVE caution lights? A. They illuminate only if the fuel valves are closed. B. They illuminate only when the fuel valves are opening. C. They are referred to as ''agreement/disagreement" lights. D. They indicate automatic opening of the fuel valves. - Answers They are referred to as ''agreement/disagreement" lights. What does the check valve in each engine fuel supply system do? A. Prevents air from entering the engine fuel supply system B. Prevents cross feed fuel from being returned to the fuel cells C. Assists in the cavitation of the engine's fuel control unit D. Automatically opens the cross feed valve if a boost pump fails - Answers Prevents cross feed fuel from being returned to the fuel cells What does fluctuating fuel pressure and a flashing FUEL BOOST caution light indicate during the cross feed valve check? A. Boost pump failure B. Check valve malfunction C. Cross feed valve malfunction D. Engine fuel pump malfunction - Answers Check valve malfunction Which of the following is not a purpose of the airframe fuel storage system? A. To direct fuel to each engine's fuel control B. To store airframe fuel until sent to the engines C. To prevent excessive CG movement during flight D. To direct fuel to each engine's boost pump - Answers To direct fuel to each engine's fuel control How many fuel cells are installed in the helicopter airframe? A. Five—two under floor cells and three upper cells B. Seven—two under floor, three upper, and two auxiliary cells C. Ten—six under floor cells and four upper cells D. Ten—four under floor cells and six upper cells - Answers Ten—six under floor cells and four upper cells What is the purpose of the fuel transfer pumps? A. To keep the fuel boost pumps supplied with fuel B. To provide the operating force for the ejector pumps C. To transfer fuel to control fuel burn sequence D. All the above - Answers All the above How are the transfer pumps normally activated on and off? A. Switched on manually and turned off by flow switches B. Switched on manually and turned off by pressure switches C. Switched on manually and turned off by thermistor switches D. Turned on and off by forward and mid cell thermistor switches - Answers Switched on manually and turned off by thermistor switches During fuel transfer which device detects a transfer pump failure and activates the appropriate FUEL TRANS caution light? A. The forward cell thermistor B. The aft cell flow switch C. The mid cell thermistor D. The in-line pressure switch - Answers The aft cell flow switch What is the purpose of the ejector pumps? A. To empty fuel from the mid cells B. To scavenge fuel from the aft cells