Exam (elaborations)
PROPULSION SYSTEMS FINAL REVIEW EXAM QUESTIONS AND ANSWERS
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PROPULSION SYSTEMS FINAL REVIEW EXAM QUESTIONS AND ANSWERS...
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What type of ignition category is a diesel engine? - ANSWER CompressionBased on the ignition processes, what are the two categories of engines? -
ANSWER Spark Ignition and compression ignition
What type of fuel do aircraft diesel engines use? - ANSWER Jet A
T/F All engines are heat engines. - ANSWER true
What type of fuel do most aircraft internal combustion engines use? -
ANSWER avgas 100
The first successful aircraft engine was built by _________. - ANSWER
Charles Taylor
Which aircraft is said to have created general aviation? - ANSWER Curtiss
JN-4 Jenny
Until the early 1920s, what engine type had the highest power-to-weight ratio of
any aircraft engine? - ANSWER rotary radial
What engine configuration is considered "the" general aviation power plant? -
ANSWER opposed engines
The crankcase provides which of the following functions: - ANSWER All of
the above: Bearings and support for the crankshaft, mounts attachments to
aircraft, attachment for the cylinders
Piston rings provide a barrier between ________ and __________. - ANSWER
combustion chamber and crankcase
What is the piston? - ANSWER both A and B; reciprocating component inside
the cylinder, changes the volume of the cylinder as it moves
, The purpose of the crankshaft is to transform _______________ into
__________. - ANSWER reciprocating motion, rotary motion
Where is the combustion chamber in an aircraft reciprocating engine located -
ANSWER cylinder
What is the advantage of using hydraulic lifters in the valve operating
mechanism? - ANSWER less maintenance and operates more quietly,
maintains zero valve clearance at all operating temperatures
Which component connects the piston to the crankshaft? - ANSWER
connecting rod
What is volumetric efficiency? - ANSWER efficiency at which the engine can
move a fuel/air charge through the cylinders
What is the component that controls valve lift, duration and timing? -
ANSWER camshaft
What is the general purpose of a bearing? - ANSWER All of the Above: A
surface that supports another surface, provide efficient and quiet operation
while allowing freedom of motion, minimize friction and wear
How many degrees of rotation is required of the crankshaft to complete a two
stroke cycle? - ANSWER 360
The horsepower resulting from the engine and propeller combination is
__________? - ANSWER thrust horsepower
What is the purpose for the order in which each cylinder is fired (Firing Order)?
- ANSWER to provide balance and reduce vibration
The horsepower actually delivered to the crankshaft of the engine is called
__________. - ANSWER brake horsepower (BHP)
How many degrees of rotation is required of the crankshaft to complete a four
stroke cycle? - ANSWER 720
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