AMS 274 UNIT 4 TEST LATEST
When should fuel heat be used?
When fuel temperature approaches 32 degrees F
Types of fuel heaters
1. Bleed Air/Fuel Heater
2. Oil/Fuel Heater
Two general fuel pump classifications
1. Variable Displacement
2. Positive Displacement
Gear-Type Fuel Pump
Positive Displacement (1500 psi, 30,000 lb/hr), includes PRV
What type of EEC does the RB-211 Turbofan incorporate?
It has a supervisory EEC incorporated into its hydro-mechanical fuel
scheduling.
Where is the check valve in a dual-line duplex type fuel nozzle
located?
The check valve in this system is located in the Pressurizing and Dump
Valve.
What is a failsafe system, and what on an engine is considered to be
one?
A fail-safe system is one that will continue functioning even if one or
more parts of the system fail. an example of this is a dual-channel
FADEC system.
END OF
PAGE 1
, AMS 274 UNIT 4 TEST LATEST
Which engine instruments shift when anti-ice is switched on?
EGT, EPR, Tachometer
What is the typical EGT rise when anti-ice is switched on?
10 degrees celsius
When are engine icing conditions most prevalent?
High-speed engine operation on the ground
When can engine inlet ice form?
Up to 40°F ambient temperature in relatively dry air and up to 45°F in
visibly moist air.
What does an anti-ice bimetallic regulator valve do?
Provides 500 degree F air at its max flow position at idle and 650 degree
F air at its min flow position near takeoff.
What is used to reduce vicinity temperatures and eliminate the
possibility of fuel or oil coming in contact with the hot parts of the
engine?
Insulation blankets on the exhaust duct of gas turbine engines
What are insulation blankets typically composed of?
END OF
PAGE 2
When should fuel heat be used?
When fuel temperature approaches 32 degrees F
Types of fuel heaters
1. Bleed Air/Fuel Heater
2. Oil/Fuel Heater
Two general fuel pump classifications
1. Variable Displacement
2. Positive Displacement
Gear-Type Fuel Pump
Positive Displacement (1500 psi, 30,000 lb/hr), includes PRV
What type of EEC does the RB-211 Turbofan incorporate?
It has a supervisory EEC incorporated into its hydro-mechanical fuel
scheduling.
Where is the check valve in a dual-line duplex type fuel nozzle
located?
The check valve in this system is located in the Pressurizing and Dump
Valve.
What is a failsafe system, and what on an engine is considered to be
one?
A fail-safe system is one that will continue functioning even if one or
more parts of the system fail. an example of this is a dual-channel
FADEC system.
END OF
PAGE 1
, AMS 274 UNIT 4 TEST LATEST
Which engine instruments shift when anti-ice is switched on?
EGT, EPR, Tachometer
What is the typical EGT rise when anti-ice is switched on?
10 degrees celsius
When are engine icing conditions most prevalent?
High-speed engine operation on the ground
When can engine inlet ice form?
Up to 40°F ambient temperature in relatively dry air and up to 45°F in
visibly moist air.
What does an anti-ice bimetallic regulator valve do?
Provides 500 degree F air at its max flow position at idle and 650 degree
F air at its min flow position near takeoff.
What is used to reduce vicinity temperatures and eliminate the
possibility of fuel or oil coming in contact with the hot parts of the
engine?
Insulation blankets on the exhaust duct of gas turbine engines
What are insulation blankets typically composed of?
END OF
PAGE 2
