In a four-stroke reciprocating aircraft engine, how many crankshaft rotations are required to complete one full operating cycle for a single cylinder?
Reciprocating Engines
Question · Easy
Valve overlap in a reciprocating engine refers to the period when:
Chapter 1: Reciprocating Engine Theory & Construction
1.1 Four-Stroke Cycle & Otto Cycle Fundamentals
Study guide
What is the primary purpose of the dynamic dampers (counterweights) attached to the crankshaft of a radial reciprocating engine?
The compression ratio of a reciprocating engine is defined as the ratio of:
Question · Medium
Detonation in a reciprocating engine cylinder is best described as:
Preignition in a reciprocating engine cylinder is caused by:
1.2 Valve Timing, Overlap & Duration
On a horizontally opposed aircraft engine, the firing order is designed primarily to:
What is the function of the piston rings in a reciprocating engine?
A differential compression test on a reciprocating engine cylinder primarily detects:
Engine Inspection
Question · Hard
During a differential compression test, if air escapes audibly from the engine breather or oil filler tube, the most likely cause is:
1.3 Compression Ratio, Manifold Pressure & Power Calculations
The purpose of the valve clearance (tappet clearance) in a reciprocating engine is to:
Hydraulic valve lifters in a reciprocating engine are designed to:
In a radial engine, the connecting rod that is directly attached to the crankpin is called the:
What does the term 'top dead center' (TDC) refer to in a reciprocating engine?
1.4 Crankshafts, Connecting Rods & Piston Assemblies
A cylinder with low compression and oil-fouled spark plugs most likely indicates:
The crankshaft of a reciprocating aircraft engine is statically and dynamically balanced primarily to:
In a gas turbine engine, the section that increases the pressure of incoming air before combustion is the:
Turbine Engines
In a turbine engine, the primary function of the turbine section is to:
Chapter 2: Reciprocating Engine Dynamics & Valve Train
2.1 Detonation, Preignition & Combustion Anomalies
Which compressor type is most commonly used in modern high-bypass turbofan engines?
A compressor stall in a gas turbine engine occurs when:
What is the primary purpose of variable stator vanes (variable inlet guide vanes) on an axial-flow compressor?
The combustion section of a typical turbine engine operates with which approximate fuel-to-air relationship in the primary combustion zone?
2.2 Dynamic Dampers, Counterweights & Vibration Control
Foreign object damage (FOD) to turbine engine compressor blades is most often caused by:
In a dual-spool turbofan engine, the term 'N1' typically refers to the rotational speed of the:
Exhaust gas temperature (EGT) on a turbine engine is monitored primarily to:
Engine Instrument Systems
A hung start in a gas turbine engine is best described as:
2.3 Valve Clearance, Hydraulic Lifters & Radial Master Rods
A hot start in a gas turbine engine is characterized by:
The purpose of a turbine engine bleed air system is to:
Turbine Engine Air Systems
In an axial-flow compressor, each stage consists of:
Turbine blade creep is best described as:
2.4 Aviation Diesel & Compression-Ignition Engines
The aircraft magneto ignition system is considered a self-contained system because it:
Ignition Starting Systems
In a magneto, the E-gap angle refers to the:
During a magneto check, an excessive RPM drop on one magneto with a normal drop on the other most likely indicates:
The purpose of an impulse coupling on a magneto is to:
Chapter 3: Turbine Engine Theory & Compressors
3.1 Brayton Cycle, Thrust Principles & Spool Configurations
If the P-lead (primary lead) to a magneto becomes disconnected, the result could be:
The capacitor (condenser) in a magneto breaker circuit functions to:
Which statement correctly describes turbine-engine high-energy igniter plugs?
Spark plug fouling caused by lead deposits is most commonly associated with:
3.2 Axial vs. Centrifugal Compressors & Diffusers
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