Systems test 2, 2023

通報

問題一覧

High wing systems powered by a piston engine with a carburetor usually have what system?

Gravity fed

What valve is used in a high wing piston engine with a carburetor for fuel supply control?

Selector valve

Fuel systems in “high performance” piston engines with fuel injection powered by what system?

Pressure fed fuel system

Where is fuel vented on a high performance piston engine plane?

Tubes outside the plane

What valve ensures nothing is leaking during maneuvering in a high performance piston engine plane?

Check valve

A low wing aircraft use what system to pressurize the fuel tanks?

Pressure fed

Fuel is vented from where on a low wing plane?

Vented through the fuel tank caps

Can a low wing plane use both fuel tanks at once? True or false

False

What type of valve does a low wing aircraft use when deleting fuel tanks for engine use?

L value

Fuel pressure is read on the fuel flow meter. The fuel flow measurement of pressure drop across ______ nozzles

Injector

An aircraft with a carbureted piston engine will have a pressure gauge that displays between ____ to indicate fuel pressure being supplied to the carburetor

.05 to .08

DC-3 fuel system contains how many fuel tanks?

4, two main tanks and two auxiliary tanks for each tank

Can all the tanks vent out the DC-3 airplane or just one at a time?

All vents at one time

What selector can select any pump to power the plane?

Fuel selector

What do “wobble pumps” do on each engine?

Ensures each engine provides pressurized fuel to the strainer through the engine driven carburetor

Once an engine is started, what pump supplies fuel under pressure to the carburetor?

Engine driven pump

A cross feed line and two valves can be operated to allow one engine driven pump to operate both pumps in the event of ____?

Pump failure

What was the crossfeed pump later replaced by on newer large aircraft ?

Replaced by two electric boost pumps to supply pressure should an engine driven pump fail

Fuel pressure is read from a ____ connected on the back of each carburetor. Pressure normally reads _____ psi approximately.

Fuel line, 14-16 psi approximately

On some airplanes low pressure warning will activate when fuel pressure drops below ___ psi ?

12 psi

Connected to the fuel pressure gauge for each engine is the _____ valve. The ____ valve when selected opens to release fuel into the upper cylinders for engine starting.

Primer solenoid valve

What is also connected to the fuel pressure gauge line? What does it do?

Oil dilution solenoid, releases fuel into the engines oil system to thin oil during cold weather starting

A ____line on each engine carburetor returns any fuel vapours back to its auxiliary tank.

Vent vapor

In a B727 fuel system, each of the ___ main fuel tanks normally supplies its respective engine

Where are fuel tank 1&2 on a B727

One inside each wing

Where is the #2 fuel tank in the B727?

Consists of bladder type fuel tanks in the fuselage

Are all the fuel tanks vented on a B727 to prevent wing structure damage and create slight positive pressure in the tanks?

True

Each main fuel tank has a centrifugal electric ___ pump to supply its respective engine driven fuel pump with fuel.

Boost

How many pumps in B727 tanks #1 and #3

How many pumps in B727 tank #2

Crossfeed valves allow any engine to be supplied fuel from any or all tanks under pressure from boost pumps through the crossfeed manifold. True or false

True

Fuel system controls located on the _____ panel include, boost pump switches, crossfeed switches and engine fuel shutoff system

Flight engineers panel

A refuelling manifold allows _____ refuelling of each tank from a single point

Underwing

Where are fuel tanks refilled from?

Refuelling valve

Typical fuel system in a piston engine helicopter?

Gravity fed

Where are fuel cells located on a helicopter?

Located as close as possible to helicopters centre of gravity

Vents in a helicopter fuel system prevent the formation of a ____ in the tank. Maintaining positive pressure on fuel.

Vacuum

A small hand operated ____ pump, allows fuel to be pumped from the strainer directly into the intake port of the cylinders prior to engine start

Primer

A ____ type throttle located on the end of the collective leaver is connected to the carburetor on a helicopter

Twist type

What is grounding?

The process of connecting two or more metallic objects and ground conductors electrodes to ground electrodes

Bonding

A process of connecting two or more metallic objects together by means of a conductor, equalizes static charges throughout the fuel system and aircraft.

Proper grounding of aircraft

1. Ground truck or fuel dispensing unit 2. Ground aircraft 3. Connect grounding cable from fuel truck to airplane

Where are light and smaller aircraft normally fuelled?

Fuelled over wing

Pressure refuelling used on?

Used on larger aircraft through one spot, can be done over wing.

Hot refuelling?

Fuelling the aircraft while its engines are turned on and running.

Can you fuel the aircraft inside?

No, must only be done outside only

What kind of fire extinguisher needed while fuelling plane?

Class b

Calibration of the radiometer fuel system used on smaller planes and helicopters achieved by?

Bending the arm of the applicable tanks float assembly arm

Calibration of a capacitance type fuel system used on larger aircraft requires the use of a ______?

Fuel quantity test set

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