Dawson 2214 Mid Term Study Guide

Fuel and Stuff

What must each fuel system in an aircraft be designed to do?

Fuel any engine

What must be labeled on each fuel filler port?

Fuel grade and usable fuel capacity.

What are fuel tank baffles designed to do?

Prevent fuel from sloshing and keep fuel over the outlets.

Are fuel tanks required to be removable?

No.

What is installed in the fuel system to shut off fuel flow?

Selector valves.

What percentage of takeoff fuel consumption must gravity-feed systems provide?

150%.

What is the primary purpose of a fuel tank sump?

To collect water and sediment.

What is fuel that cannot be used because of aircraft design called?

Unusable fuel.

What is the purpose of a surge tank?

To collect excess fuel and prevent fuel loss through the vents.

What is another name for an integral fuel tank?

Wet-wing tank.

What are the two basic types of aircraft fuel systems?

Gravity-feed and pump-feed.

What is the purpose of fuel heaters?

To prevent ice formation in the fuel system.

What type of fuel cell is a reinforced rubberized bag in a non-fuel-tight compartment?

Bladder-type fuel cell.

What percentage of expansion space must fuel tanks have?

2%.

What is used to move fuel when gravity flow is insufficient?

Boost Pump

What component allows a boost pump to force fuel around the main pump vanes?

A bypass valve.

What are relief valves designed to compensate for?

Balance Relief Valve

Which type of fuel pump has no moving parts?

Ejector pump.

What system warns the crew when a fuel filter is bypassing fuel?

Filter bypass indicator system.

How must fuel lines be routed?

So there are no sharp bends.

Where do priming systems usually draw fuel from?

The fuel tank.

What component prevents external flames from entering the surge tank?

Flame arrestor.

Which fuel subsystem allows fuel to be dumped overboard in flight?

Fuel jettison/dump system.

What allows fuel to flow inboard toward boost pumps during turbulence?

Check valves.

What is a running fuel leak?

Ground Aircraft

Why are fuel heaters installed in turbine aircraft?

To prevent fuel-system icing.

What mixture of fuel and air does a primer provide?

A fuel-rich mixture.

Why is the main fuel strainer located at the lowest point?

To collect water and sediment.

How may the antiknock characteristics of fuel be improved?

Adding Tetraethyl Lead

What is the primary purpose of a crossfeed system?

To allow one engine to receive fuel from another tank.

Why are fuel system components bonded and grounded?

To prevent static electricity and sparks.

Is reciprocating-engine fuel more susceptible to microorganism growth than turbine fuel?

False

What do fuel tank sumps collect?

Water and sediment.

What are the principal contaminants in fuel?

Micro Organisms

When should water be drained from tank sumps?

Before flight and after refueling, as required.

What activates the thermocouple fire-warning system?

Rate of temperature rise.

Which fire-detection system uses two wires embedded in a core within a tube?

Kidde system. Fin Wall System

Does a Systron-Donner system reset automatically after a fire is removed?

Yes.

What are smoke detectors that measure light transmissibility called?

Photoelectric smoke detectors.

How can a fire-extinguisher container be checked to determine its charge?

By Weighting the Extinguisher

How is thermal discharge of a built-in CO₂ fire-extinguisher system detected?

By rupture of the red plastic disc in the thermal discharge line.

What is the purpose of a squib in a fire-protection system?

To initiate discharge of the fire-extinguishing agent.

What must be done to the surface before installing pneumatic surface-bonded deicer boots?

Clean and prepare the surface so it is smooth, dry, and free of contaminants.

How can proper operation of a pitot/static tube heater be checked after replacement?

Check for heat

What controls the inflation sequence in a pneumatic deicer boot system?

Distributor valve.

What regulates the vacuum holding deicer boots deflated when the system is off?

Distributor Valve

What is the purpose of the oil separator in a pneumatic deicing system?

To remove oil from the pump air.

What are two possible heat sources for a wing thermal anti-icing system?

Engine bleed air and electrical heating.

What maintains normal windshield temperature in an electrically heated windshield system?

Thermistors

What can cause arcing in an electrically heated windshield panel?

Damaged or cracked heating elements.

Why should chemical rain repellent not be used on a dry windshield?

Cause Smear

What is the best means of removing wet snow from an aircraft?

Squeegee

What icing condition may occur when there is no visible moisture?

Carb Icing

How is manual discharge of a built-in CO₂ fire-extinguisher system detected?

By the missing/ruptured Red discharge indicator disc.