Engine Fuel Sys-Powerplant

1 (8732) - During what period does the fuel pump bypass valve open and remain open?

B- When the boost pump pressure is greater than fuel pump pressure.

2 (8733) - Which of the following statements concerning a centrifugal-type fuel boost pump located in a fuel supply tank is NOT true?

C- The centrifugal-type pump is classified as a positive displacement pump.

3 (8734) - Where is the engine fuel shutoff valve usually located?

A- Aft of the firewall.

4 (8735) - Boost pumps in a fuel system

C- provide a positive flow of fuel to the engine pump.

5 (8736) - (Refer to Figure 7.) What is the purpose of the fuel transfer ejectors?

B- To assist in the transfer of fuel from the main tank to the boost pump sump.

6 (8737) - What is the purpose of an engine-driven fuel pump bypass valve?

B- To prevent a damaged or inoperative pump from blocking the fuel flow of another pump in series with it.

7 (8738) - Most large aircraft reciprocating engines are equipped with which of the following types of engine-driven fuel pumps?

A- Rotary-vane-type fuel pump.

8 (8739) - When an electric primer is used, fuel pressure is built up by the

C- booster pump.

9 (8740) - The fuel pump relief valve directs excess fuel to the

B- inlet side of the fuel pump.

10 (8741) - Which type of pump is commonly used as a fuel pump on reciprocating engines?

C- Vane.

11 (8742) - The purpose of the diaphragm in most vane-type fuel pumps is to

C- compensate fuel pressures to altitude changes.

12 (8743) - The primary condition(s) that allow(s) microorganisms to grow in the fuel in aircraft fuel tanks is (are)

B- the presence of water.

13 (8744) - It is desirable that fuel lines have a gentle slope upward or downward and not have sharp curves or sharp rises and/or falls in order to

A- prevent vapor lock.

14 (8745) - The fuel systems of aircraft certificated in the standard classification must include which of the following?

B- A positive means of shutting off the fuel to all engines.

15 (8746) - Where should the main fuel strainer be located in the aircraft fuel system?

B- At the lowest point in the fuel system.

16 (8747) - Where physical separation of the fuel lines from electrical wiring or conduit is impracticable, locate the fuel line

A- below the wiring and clamp the line securely to the airframe structure.

17 (8748) - What is a characteristic of a centrifugal-type fuel boost pump?

A- It separates air and vapor from the fuel.

18 (8749) - The Federal Aviation Regulations require the fuel flow rate for gravity systems (main and reserve) to be

C- 150 percent of the takeoff fuel consumption of the engine.

19 (8750) - Fuel boost pumps are operated

A- to provide a positive flow of fuel to the engine.

20 (8751) - A pilot reports that the fuel pressure fluctuates and exceeds the upper limits whenever the throttle is advanced. The most likely cause of the trouble is

B- a sticking fuel pump relief valve.

21 (8752) - A fuel strainer or filter must be located between the

B- tank outlet and the fuel metering device.

22 (8753) - Fuel pump relief valves designed to compensate for atmospheric pressure variations are known as

C- balanced-type relief valves.

23 (8754) - Fuel lines are kept away from sources of heat, and sharp bends and steep rises are avoided to reduce the possibility of

B- vapor lock.

24 (8755) - Fuel crossfeed systems are used in aircraft to

C- maintain aircraft stability.

25 (8756) - If an engine equipped with a float-type carburetor backfires or misses when the throttle is advanced, a likely cause is that the

C- accelerating pump is not operating properly.

26 (8757) - A fuel pressure relief valve is required on

B- engine-driven vane-type fuel pumps.

27 (8758) - A rotary-vane pump is best described as a

A- positive-displacement pump.

28 (8759) - Fuel pressure produced by the engine-driven fuel pump is adjusted by the

B- relief valve adjusting screw.

29 (8760) - Kerosene is used as turbine engine fuel because

B- kerosene has more heat energy per gallon and lubricates fuel system components.

30 (8761) - What are the principal advantages of the duplex fuel nozzle used in many turbine engines?

B- Provides better atomization and uniform flow pattern.

31 (8762) - It is necessary to control acceleration and deceleration rates in turbine engines in order to

A- prevent blowout or die-out.

32 (8763) - Which of the following turbine fuel filters has the greatest filtering action?

A- Micron.

33 (8764) - What is the purpose of the flow divider in a turbine engine duplex fuel nozzle?

B- Creates the primary and secondary fuel supplies.

34 (8765) - What causes the fuel divider valve to open in a turbine engine duplex fuel nozzle?

A- Fuel pressure.

35 (8766) - How often should float carburetors be overhauled?

A- At engine overhaul.

36 (8767) - What is the final authority for the details of carburetor overhaul?

C- The manufacturer's recommendations.

37 (8768) - Excessively rich or lean idle mixtures result in

B- incomplete combustion.

38 (8769) - Which statement is true regarding proper throttle rigging of an airplane?

A- The throttle stop on the carburetor must be contacted before the stop in the cockpit.

39 (8770) - What precaution should be taken when putting thread lubricant on a tapered pipe plug in a carburetor float bowl?

C- Engage the first thread of the plug, then put a small amount of lubricant on the second thread and screw the plug in.

40 (8771) - Maximum power is normally considered to be developed in a reciprocating engine with a fuel/air mixture ratio of approximately

B- 12:1