Turbine Engines
The abbreviation Pt7 used in turbine engine terminology means
the total pressure at station 7.
Some cylinder barrels are hardened by
nitriding
The primary source of oil contamination in a normally operating reciprocating engine is
combustion deposits due to combustion chamber blow-by and oil migration on the cylinder walls
How many secondary coils are required in a low-tension ignition system on an 18-cylinder engine?
36
What corrective action should be taken when a carburetor is found to be leaking fuel from the discharge nozzle?
Replace the needle valve and seat
This turbine engine section provides for proper mixing of the fuel and air.
Combustion section
If the intake valve is opened too early in the cycle of operation of a four-stroke cycle engine, it may result in
backfiring into the induction system
Why is expansion space required in an engine oil supply tank?
For oil enlargement and collection of foam
The spark is produced in a magneto ignition system when the breaker points are
beginning to open.
An aircraft engine continuous cylinder fuel injection system normally discharges fuel during which stroke
All (continuously).
This location is the highest gas pressure in a turbojet engine
the entrance of the burner section
If the hot clearance is used to set the valves when the engine is cold, what will occur during operation of the engine?
The valves will open late and close early
High tooth pressures and high rubbing velocities, such as occur with spur-type gears, require the use of
an EP lubricant
Magneto breaker points must be timed to open when the
greatest magnetic field stress exists in the magnetic circuit
What component is used to ensure fuel delivery during periods of rapid engine acceleration?
Acceleration pump.
The turbine section of a jet engine drives this section
the compressor section
Valve overlap is defined as the number of degrees of crankshaft travel
during which both valves are off their seats
The vent line connecting the oil supply tank and the engine in some dry sump engine installations permits
the oil tank to be vented through the normal engine vent.
Aircraft magneto housings are usually ventilated in order to
provide cooling and remove corrosive gases produced by normal arcing.
The economizer system in a float-type carburetor does this
increases the fuel/air ratio at high power settings
This engine instrument indication is the first sign of a successful start of a turbine engine?
A rise in the exhaust gas temperature
If the exhaust valve of a four-stroke cycle engine is closed and the intake valve is just closed, the piston is on the
compression stroke
The oil used in reciprocating engines has a relatively high viscosity due to
large clearances and high operating temperatures
Using a cold spark plug in a high-compression aircraft engine would probably result in
normal operation
The device that controls the volume of the air-fuel mixture to the cylinders is called a
throttle valve.