PP 17

Where is the highest pressure in a turbine engine. Diffuser. Turbine inlet.

EPR is a reading displayed in the cockpit as. % rpm. Pressure in psi.

Deep grove Ball bearings are used on a compressor and rotors to. Support both axial (thust) and radial (centrifugal). Support only radial loads.

Factors that affect thrust. Temp, alt, airspeed, eng rpm and fan eff. Oil pressure, oil temperature, humidity only.

What happens to engine thrust after 36,000 ft?. Thrust decreases. Thrust increases.

Ram recovery in flight the inlet pressure is. Returns to ambient. Drops below ambient.

Which law of physic? When air reacts as an uncompressible fluid. Bernoulli principle. Newton's 3rd law.

Newton’s 2nd law involves. Accleration. Force direction only.

When air flow into a venturi air. Kinetic energy inc (potential dec.). Kinetic energy dec (potential inc.).

Amount of air routed around the nozzles for combustion?. 25-35% approx. 50-60% approx.

Hot spot on an exhaust duct, beside a faulty nozzle, could be caused by. Faulty combustion chamber. Blocked air filter.

What allows prop to run at a desired and the compressor to find and run at its optimum speed?. Free turbine arrangement. Fixed shaft arrangement.

What could cause erratic oil pressure readings. Stuck relief valve, low oil level. Incorrect fuel mixture.

Where is the main oil screen located. Right after the oil pressure pump. Inside the oil tank.

What readings do the FCU use to regulate fuel. Eng speed, inlet pres., inlet temp, comp. discharge press & burner can press. Oil pressure and egt only.

Rough edges or tears on compressor blades are known as. Burr, a sharp projection or rough edge. Gouge marks.

Turbines blades with convergent curves are known as. Reaction turbine. Impulse turbine.

Area of the engine that takes air leaving the turbine and straightens it out. Exhaust pipe. Diffuser.

Where is the oil temp. regulator located. In the return line to the tan of a dry sump system. In the pressure line before the bearings.

A starter can rotate freely up to what RPM. 0–10% rpm (free rotation range). 50% rpm.

If the oil line between the scavenge pump and the cooler separates what happens to the oil. It dumps overboard. It backs up into the accessory case.

What is a blade with compound curves is called. Reaction blade. Impulse blade.

4 lobe cam rings on a 9 cylinder radial will rotate at?. 1/8 (1/(2*lobe cam)). 1/4 lobe cam).

What measures temperature increase compared to a reference?. Thermocouples/cylinder head temp in piston engine. Manifold pressure gauge.

Where does oil in hydraulic lifter come from?. Oil supply chamber connected to engine oil supply. Fuel return line pressure.

A compensator cam in radial mags operate at?. Same linear distance from top of stroke, 1 lobe per cylinder. Twice crankshaft speed.

The cowl flag on the ground should be?. Open. Closed.

What are variable guide inlet vanes operated with?. The fcu. The oil scavenge system.

What component is distinctive of high-tension mags?. The component that is distinctive of high-tension magnetos is an internal high-voltage coil (transformer). The presence of a permanent magnet only.

How is an exhaust cabin heater inspected?. An exhaust cabin heater is inspected by performing a visual check for leaks, cracks, and soot buildup, followed by functional tests like a pressure or leak test to find small defects (must remove the shroud). Only by checking cabin temperature.

On a radial engine, while cylinder #1 is at TDC, cylinder #3 has low compression. What could be the cause of this?. When cylinder #1... Incorrect ignition timing only.

Inflight flameouts are usually caused by what?. Altitude, turbulance weather, slow accel, high speed manoeuvre. Excess oil pressure.

Excessive blow by on new rings is probable what?. Ring gaps are lined up. Cylinder is overheated.