Magnetos
Failure of an engine to cease firing after turning the magneto switch off is an indication of?
An open "P" lead
Can Thermal couple leads be altered?
No! They are designed for a specific installation and may not be altered.
If a float-type carburetor leaks fuel when the engine is stopped a likely cause is that the?
The float needle valve is worn or otherwise not seated properly
What operation force causes the greatest stress on a propeller?
Centrifuge force
A condition that can occur in radial engines but is unlikely to occur in horizontally opposed engines is?
Hydraulic lock
When internally timing a magneto, the breaker points begin to open when?
The magnet poles are a few degrees beyond the neutral position
A complete break in the line between the manifold pressure gauge and the induction system will be indicated by the gauge registering?
Prevailing atmospheric pressure
A punctured float in a float-type carburetor will cause the fuel level to?
Rise, enriching the mixture
How does the aerodynamic twisting force affect operating propeller blades
It tends to turn the blades to a high blade angle
On which strokes are both valves on a four-stroke cycle reciprocating aircraft engine open?
Exhaust and intake
The electrical circuit from the spark plugs back to the magneto is completed by grounding through what?
The engine structure.
Where are the hot and cold junctions located in an engine temperature indicating system?
The hot junction is located at the cylinder and the cold junction is located at the instrument.
Where is the throttle vale located on a float type carburetor?
After the main discharge nozzle and venturi
The actual distance a propeller moves forward through the air during one revolution is know as what?
Effective pitch
Excessive valve clearances will cause the duration of the valve opening to?
Decrease for both intake and exhaust vales
When performing a magneto ground check on an engine, correct operation is indicated by?
A slight drop in RPM
An indication on a thermocouple-type cylinder head temperature indicator is produced by?
A current generated by the temperature difference between dissimilar metal hot and cold junctions
What is a possible cause of an engine running rich at full throttle if it is equipped with a float-type carburetor?
Clogged main air bleed
The angle-of-attack of a rotating propeller blade is measured between the blade chord or face and which of the following?
Relative airstream
At what speed must a crankshaft turn if each cylinder of a four-stroke cycle engine is to be fired 200 times a minute?
400 Rpm
What is the purpose of using an impulse coupling in a magneto
To produce a momentary high rotational speed of the magneto
What unit in a tachometer system sends information to the indicator?
The three phase ac generator
Excessively rich or lean idle mixtures result in?
Incomplete combustion
The thrust produced by a rotating propeller is a result of what?
An area of decreased pressure immediately in front of the propeller blades
If the exhaust valve of a four-stroke cycle engine is closed and the intake valve is just closed the piston is on what stroke?
The compression stroke