M17.2

A fibreglass composite blade. will never be struck by lighting. does not require lightning strike protection. requires lightning strike protection.

The timber most often used today for propeller construction is. birch. spruce. balsa.

Electronic torque measuring systems utilise. strain gauges in the reduction gear. stress gauges in the reduction gear. pressure transducers in the reduction gear.

A conventional turboprop torque meter uses. hydraulic oil as the pressure medium. coiled spring levers as the pressure medium. engine oil as the pressure medium.

Metal at the tip and along the leading edge of a wooden propeller is. for balancing. for protection. for Anti-icing.

Blade cuffs are fitted to the root of the blades. to increase the strength of the blade. to increase thrust. to increase flow of cooling air into the engine nacelle.

Low torque sensing is used to. increase power. increase pitch. initiate auto-feather.

Torque sensing is used to. reduce drag. reduce drag following engine shutdown. synchronise blade angle.

The minimum percentage seating on a propeller rear cone should be. 90%. 70%. 95%.

The propeller is 'feathered' when the blades are at. 0° to plane of rotation. 20° to plane of rotation. 90° to plane of rotation.

The thrust of a propeller is normally taken by the. torque meter. propeller rear cone. front bearing in the reduction gear.

On which type of turbo-propeller would you expect to find a parking brake?. Compounded twin spool. Direct coupled twin spool. Free turbine.

What does the torquemeter reading indicate in a gas turbine engine?. Torque reaction at the reduction gear. The ratio between engine thrust and engine torque. Engine torque.

The gear segments on the blade roots of a hydromatic propeller mesh with the. stationary cam. torque tubes and eye bolts. moving cam.

A propeller is centralised on the propeller shaft by. the front and rear cones. the front git seal. the rear pre-load shims.

Reduction gearing allows the. blade tips to operate below the speed of sound. blade tips to operate above the speed of sound. blade tips to rotate slower than the root of the propeller blade.

When fitting a propeller to a tapered shaft. locate the master spline. ensure the master spline and blade alignment are in accordance with the MM. ensure fully seated.

What is the purpose of small holes at the tip of wooden propellers?. Drainage. Balancing. Pivot points used during manufacture.

The thrust face of a propeller blade is the. root to which the gear segment is fitted. blade face or flat side. blade back or curved side.

Solidity of a propeller can be increased by. increasing blade chord. increasing blade angle. increasing blade thickness.

A turbo-prop engine. uses an epicyclic reduction gear system. uses a spur gear reduction system. does not require a reduction gear system due to the propshaft being driven from the low speed compressor.

Total power of a turbo-prop engine is measured in. Equivalent Shaft Horsepower (ESHP). Shaft Horsepower (SHP). Brake Horsepower (BHP).

The disadvantage of using reverse pitch on a turbo-propeller engine is. exhaust gas ingestion , high gas temperature and debris ingestion. debris ingestion. high gas temperature.

A compound twin spool engine is. turbo prop propeller driven by a power turbine. turbo prop twin spool compressor. LP Compressor driven by a free turbine.

With the engine stationary the indication that the propeller is in ground fine pitch is. blade and spinner markings aligned. below stop warning light on. flight fine pitch stop lever withdrawn.

When the power lever on a turbo prop engine is moved from ground idle to flight fine the fuel flow increases and the blade angle. increases. decreases. remains the same.

How is the blade station measured?. In inches from the centre of the hub. In inches from the tip. As a percentage of blade length from the tip.

The oil used in the torquemeter system is. DTD 5 8 5. engine oil pressure boosted by a pump driven off the reduction gear. PCU oil pressure.

Which type of turboprop engine is practically free from surge and requires low power for starting?. Compound twin spool. Directly coupled. One using a centrifugal compressor.

Blade stations are measured from the. centre of the hub. tip. shank.

Auto feathering is disarmed. during landing. during take off. in the cruise.

With a multi-engined aircraft the torque pressure would be. There is only one gauge for all engines. same on all engines. similar on all engines.

If torque pressure fell to zero during the cruise what would indicate that the gauge had failed?. Engine would auto feather. Engine would overspeed. Engine would continue to run.

The purpose of using reverse pitch propellers is to. provide aerodynamic breaking. allow aircraft to taxi backwards. reverse the direction of rotation of the propeller.

The RPM of a windmilling propeller is primarily related to. EAS. IAS. TAS.

A ducted propeller is used because. ducted props give more thrust for the diameter of disc. only ducted propellers can be vectored. ducted props give less thrust for the diameter of disc.

A two position prop uses. high pitch for take off and low pitch for cruise. low pitch for take off and climb and high pitch for cruise. high pitch for take off, low pitch for climb and descent and high pitch for cruise.

A propeller operating in the Beta range is operating between. Flight Idle and Ground Idle. coarse and flight fine pitch. maximum reverse pitch and Flight idle pitch.

The CSU oil pump is provided to. boost engine oil pressure to decrease pitch. boost engine oil pressure to alter pitch. boost engine oil pressure to increase pitch.

Counterweights are used to. counter the ATM of the blades. counteract the CTM of the blades. balance the blades.

The pressure face of a propeller is. the flat face. the leading edge. the camber face.

In blade station numbering the stations nearest the hub are. datum. highest. lowest.

A propeller mounted forward of the engine is known as. hydromatic propeller. a tractor propeller. a pusher propeller.

Contra-rotating propellers are. two propellers on the same shaft on one engine-each revolving in a different direction. propellers geared to rotate in the opposite direction to the engine. propellers on a twin engined aircraft revolving in opposite directions.

An aerodynamic braking propeller goes through. the feathered pitch position to act as a brake. the coarse pitch position to act as a brake. the fine pitch position to act as a brake.

The term spinner is applied to. a propeller tip vortex. a streamline covering over the propeller hub. an acrobatic manoeuvre.

Turbo-prop engines require a slightly higher viscosity oil than a turbo-jet engine due to. lower engine rpm. higher engine rpm. reduction gear and propeller pitch chang mechanism.

The propulsive efficiency of a propeller-turbine engine is higher than that of a jet-turbine engine at aircraft speeds. above approximately 450 mph. within the range 450 mph and 700 mph. below approximately 450 mph.

A propeller has the requirement of a. manufacturers data plate. type certificate or equivalent certificate. batch number.

Variable pitch propellers are used because they are. reduce vibration and noise. have peak efficiency over a greater speed range. more economical.

The condition lever normally has the following settings. normal, beta-range and reverse range. cut-off, idle and high idle. rich, lean and cut-off.

What is the ground clearance for a Tricycle Geared Aircraft?. 7 inches. 9 inches. 1 inch.

In a variable pitch propeller system, a decrease in propeller RPM will alter the angle of attack on the blade to. increase angle of attack. decrease angle of attack. increase negative torque.

To achieve reverse pitch the blade angle must be. more than 17°. less than 0°. more than 90°.

Centrifugal latches are fitted to lock the propeller. in the feathered position. when stationary. in the fine pitch position.

Counterweights are fitted to blade root to. counteract ATM. assist blade to move to fine pitch. counteract CTM.

The limits for blade angle are controlled by pitch stops on the. propeller shaft. blade root. cylinder.

The range of angles of a VP propeller is usually limited by. the fine pitch position. the feathering angle. coarse and fine pitch stops.

The purpose of fine pitch stop is to. maintain constant speed in flight. prevent the propeller moving below flight fine pitch in flight. maintain maximum RPM at takeoff.

Which best describes a Variable Pitch propeller?. The blade angles can be changed in flight. Its blade angles are set with an automatic system with which the pilot has no input. Its blade angles can only be set on the ground.

The holding coil of a hydromatic propeller feathering button switch holds a relay closed that applies power to the propeller. dome feathering mechanism. feathering pump motor. governor.

The primary purpose of the front and rear cones for propellers that are installed on splined shafts is to. prevent metal-to-metal contact between the propeller and the splined shaft. reduce stresses between the splines of the propeller and the splines of the shaft. position the propeller hub on the splined shaft.

The constant-speed control unit is also called a. propeller pitch control. accumulator. governor.