Reciprocating Engines Flashcards
A cold cylinder is found when troubleshooting a running engine. What does this indicate
No combustion in the cylinder
When pulling a propeller through a hissing sound is heard, indicating valve blow-by. What procedure should be performed next
A compression check to identify faulty cylinder
What is the purpose of performing a compression test
To determine if the valves, pistons and rings are sealing properly
Name some of the precautions that should be performed prior to engine removal
Disconnect the battery, turn off the fuel valves, chock the wheels, and if necessary, install a tail stand
When inspecting a piston where are cracks most likely to be found
In areas with high stress
- Base of piston bosses
- Inside at the junction of the bore and walls
- Ring lands
What does it mean if an engine part is within serviceable limits
The part is within manufactures limits and can be used in an engine
What tools or instruments are used to inspect a cylinder barrel for out of roundness
Dial indicator or inside micrometer
What publication is used to check an engine for normal operation
Manufacturers maintenance manual
A weak cylinder is found during a compression check. What must be inspected
Pressure is transmitted equally in all directions
What does a tachometer indicate on a reciprocating engine
Engine R.P.M
Is the aircraft electrical system required to power a cylinder head temperature gage
No. Thermocouple is the source
Where should the thermocouple be installed on a reciprocating engine using a single probe cylinder head temperature system
On the hottest cylinder
What directly controls manifold pressure
Throttle opening and engine r.p.m
During engine operation where should the propeller control be set when checking the manifold pressure
Low pitch, high r.p.m
What unit of measure is generally used to indicate fuel flow
Pounds or gallons per hour
