Last one
What is the purpose of a turbocharger system for small reciprocating aircraft engine?
Compress air to main manifold pressure constant from sea level to the critical altitude of the engine
Repair of exhaust system components
Is not recommended to be accomplished in the field
What is the function of the differential pressure controller?
It controls all positions of the waste gate except at full open position
A bent cooling fin on an aluminum cylinder head should be
Left alone if no crack has formed
The purpose of a sonic Venturi on a turbochargered engine is so?
Limit the amount of air that can flow from the turbocharger into the cabin for pressurization
What is the purpose of a density controller in a turbocharger system?
Limits the maximum manifold pressure that can be produced by the turbocharger at full throttle
Reciprocating engine exhausts systems that have repairs or sloppy weld beads which protrude internally are unacceptable because they cause
Local hot spots
Ball joints in reciprocating engine exhaust systems should be
Loose enough to permit some movement
Increased engine heat will cause volumetric efficiency to
decrease
What are the three basic regulating components of a sea-level boosted turbocharger system?
1, 4, 5
Boost manifold pressure is generally considered to be any pressure above?
30 inches Hg
Dislodged internal muffler baffles on a small reciprocating engine may cause
Excessive exhaust back pressure
Augment tubes are part of which reciprocating engines system
Exhaust
The primary purpose of baffles and deflectors installed around cylinders of air cooled aircraft engines is to
For cooling air into close contact with all parts of the cylinder
What is the position of the cowl flaps during engine starting and warmup operations under normal conditions
Full open at all times.
What is used to drive a supercharger?
Gear train from the crankshaft
Compared to normally aspirated engines a turbocharged engine exhaust system operate
Higher temp at higher pressures
The position of the cowl flaps during normal cruise flight condition is
Closed
Bootstrapping of a turbocharged engine is indicated by?
A transient increase in engine power
The purpose of an inter cooler when used with a turbocharger is to cool the
Air entering the carburetor from the turbocharger
If the turbocharger water gate is completely closed?
All the exhaust gases are directed through the turbine
(1) some aircraft exhaust systems include an augmented system to draw additional air over the engine for cooling (2) augmented systems are used to create a low pressure area at the lower rear of the aircraft engine cowling
Both no. 1 and no. 2 are true
What type of nuts are used to hold an exhaust
Brass or heat resistant nuts
How should ceramic coated exhaust components be cleaned
By degreasing.
How do cowl flaps aid in cooling a horizontally opposed aircraft engine?
Controls the amount of air flowing around the cylinders.
What is the purpose of the rate of change controller in a turbocharger system?
Controls the rate at which the turbocharger discharge pressure will increase
Aircraft reciprocating engine cylinder baffles and deflectors should be repaired as required to prevent loss of
Cooling
Which of the following results in a decrease in volumetric efficiency
Part-throttle operation.
What could be a result of undetected exhuast system leaks in a reciprocating engine powered airplane
Pilot passenger incapacition caused by carbon monoxide entering the cabin
The differential pressure controller in a turbocharger system?
Reduces bootstrapping during party throttle operation
Select a characteristic of a good weld on exhuast stacks
The weld should taper off smoothly into the metal
Cylinder head temperatures are measure by means of an indicator and a
Thermocouple sending device
What is the purpose of an augmented used in some recip engine exhaust systems
To aid in cooling the engine
What is the purpose of an exhaust outlet guard on a small reciprocating engine
To prevent dislodged muffler baffles from obstructing the muffler outlet.
Which of the following defects would likely cause a hot spot on a recip engine cylinder
Too much cooling fin area broken off.
What directly regulates the speed of a turbocharger?
Turbine
The pressure between the turbocharger and the throttle valve is called?
Upper deck pressure
How should corrosion resistant steel parts such exhaust collectors cleaned
Use sand which has not previously been used in iron or steel
During ground operation of an engine, the cowl flaps should be in what position?
fully open
A broken cooling fin on a cylinder head
may be filed to smooth contours if damage and/or repair limits are not exceeded.
Most exhaust system failures result from thermal fatigue cracking in the areas of stress concentration. This condition is usually caused by
the high temperatures at which the exhaust system operates
