Exam Review: Components Flashcards
What are RIGID fuel lines made out of?
Aluminum Alloy
Stainless Steel
What are FLEXIBLE fuel lines made of?
Synthetic Rubber
Teflon
Why do we need at least one bend in RIGID tubing?
Thermal expansion
What are the 3 types of valves we will be working with?
Manual
Motor Operated
Solenoid Operated
What are the types of MANUAL fuel valves?
CONE
POPPET
This type of valve is used on small aircrafts as a selector and shut off valve, made from BRASS, has a DETENTE gate and SPRING LOADED PIN
Cone type valve
Describe the Poppet valve
Handle attached to CAMSHAFT, lifts POPPET valve, lets fuel flow
These types of Fuel Valves are used on LARGE aircraft because they can be remotely operated
MOTOR OPERATED
What are the types of MOTOR OPERATED fuel valves?
Ball
Gate
How does a SOLENOID valve work?
Current goes through solenoid, flow, deenergized, spring pin clsoed
What are the 2 types of pumps we will be dealing with?
EDP
AUX PUMP
What are the types of AUX pumps we will be dealing with?
Centrifugal
Ejector
Electric Pulsating
How does a CENTRIFUGAL pump work?
Fuel into center impeller and expelled at outer edge
If the CENTRIFUGAL pump is installed IN the tank what happens?
Positive pressure throughout fuel system
Separates vapours from fuel prior to entering pump inlet
How does the EJECTOR PUMP work?
Bernoulli’s principle
Pressurized fuel flow comes upstream from the ejector pump is known as what?
MOTIVE FLOW
What are the main functions of the EJECTOR pump?
Feed
Scavenge
What is the one drawback of an ejector pump?
Can only operate once the engine is running
This type of pump uses a solenoid, springs and piston to pump fuel
ELECTRIC PULSATING PUMP
How is an ELECTRIC PULSATING PUMP usually installed?
Parallel to EDP to supply backup
What is the purpose of the EDP?
Deliver continuous fuel at proper pressure at all times
What are the types of EDPs?
Vane
Diaphragm
This type of pump is mostly used for piston engines, provides constant displacement and requires a bypass
Vane type
This type of pump is used in many 4-6 cylinder CARBURATED piston engines
DIAPHRAGM
Where do we use a FUEL HEATER?
Turbine engines
What are the 3 types of FUEL QUANTITY indicators?
Direct
Electric
Electronic
What are the types of Direct reading?
Mechanical
Sight glass
This type of indication is used on SMALL to MEDIUM aircraft, consists of a float and transmitter
RESISTANCE (electrical)
On what type of AIRCRAFT do we use the CAPACITANCE (electronic) type?
Large High Performance
What is the purpose of a MAGNETIC DIPSTICK and DRIP GAUGE
Determine fuel on board without using the electric/ekectronic
What does the FUEL PRESSURE indicator show?
Entering the metering unit
What does the FUEL FLOW indicator show?
Amount of fuel being burned
On PISTON engines where is the fuel flow indication taken?
AT MANIFOLD (fuel pressure)
Where do TURBINE engines take their FUEL FLOW indication?
OUTLET OF FCU
