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TECHGEN-BNC-MODULE6
1.
What will happen to the geometrical pitch angle of a "constant speed propeller" if the manifold pressure is increased ?
a) It will remain the same
b) It will increase
c) It will increase and after a short time it will be the same again
d) It will decrease so that the engine can increase
2.
The skip zone of HF-transmission will increase when the following change in circumstance occurs:
a) Lower frequency and lower position of the reflecting ionospheric layer
b) Higher frequency and higher position of the reflecting ionospheric layer
c) Lower frequency and higher position of the reflecting ionospheric layer
d) Higher frequency and lower position of the reflecting ionospheric layer
3.
During climb with constant throttle and RPM lever setting (mixture being constant) the:
a) RPM decreases.
b) Manifold Air Pressure (MAP) decreases.
c) Manifold Air Pressure (MAP) increases.
d) RPM increases.
4.
The task of the primer pump is to
a) provide additional fuel for an engine start.
b) to serve as main supply pump in a fuel injection system.
c) inject additional fuel during engine acceleration.
d) serve as an alternate pump in case of an engine driven pump failure.
5.
The passenger oxygen mask will supply:
a) a mixture of cabin air and oxygen.
b) a mixture of oxygen and freon gas.
c) 100 % oxygen.
d) a mixture of compressed air and oxygen or 100 % oxygen.
6.
In modern aircraft, a pilot can actuate the feather system by:
a) pushing the RPM lever forwards.
b) pulling the power levers rearwards.
c) pushing the power lever forwards.
d) pulling the RPM lever rearwards.
7.
With which instrument(s) do you monitor the power output of an aeroplane fitted with a fixed pitch propeller?
a) RPM and MAP indicator.
b) RPM and EGT indicator.
c) RPM indicator.
d) RPM and Fuel Flow indicator.
8.
The torque of an aeroplane engine can be measured at the:
a) camshaft.
b) accessory gear box.
c) propeller blades.
d) gear box which is located between the engine and the propeller.
9.
Skip distance is the:
a) wavelength distance of a certain frequency
b) thickness of the ionosphere
c) highest critical frequency distance
d) range from the transmitter to the first sky wave
10.
The ice protection for propellers of modern turboprop aeroplanes works
a) pneumatically.
b) with anti-icing fluid.
c) with hot air.
d) electrically.
11.
An EGT (Exhaust Gas Temperature) indicator for a piston engine is used to:
a) control the carburettor inlet air flow.
b) control the cylinder head temperature.
c) assist the pilot to set the correct mixture.
d) control the fuel temperature.
12.
The power of a piston engine decreases during a climb with a constant power lever setting because of the decreasing:
a) humidity.
b) air density.
c) engine temperature.
d) temperature.
13.
Ignition systems of piston engines are:
a) dependent on the DC-Generator.
b) dependent on the battery.
c) independent of the electrical system of the aircraft.
d) dependent on the AC-Generator.
14.
The crank assembly consists of
a) propeller, crankshaft, pistons and connecting rods.
b) crankshaft, connecting rods and pistons.
c) crankshaft, camshaft, valves, valve springs and push rods.
d) Crankcase, crankshaft, connecting rods and pistons.
15.
The purpose of a diluter demand regulator in an oxygen system is to:
a) deliver oxygen flow when inhaling.
b) deliver oxygen flow only above FL 100.
c) mix air and oxygen in a passenger oxygen mask.
d) is only recommended with smoke in the cockpit.
16.
Which of the following qualitative statements about a fixed propeller optimized for cruise condition, is true for the take-off case? The angle of attack of the propeller:
a) blade is relatively high.
b) blade is relatively small.
c) airfoil section is negative.
d) blades reduces to zero.
17.
Ignition occurs in each cylinder of a four stroke engine (TDC = Top Dead Centre):
a) before TDC at each crankshaft revolution.
b) behind TDC at each crankshaft revolution.
c) behind TDC at each second crankshaft revolution.
d) before TDC at each second crankshaft revolution.
18.
The useful work area in an ideal Otto engine indicator diagram is enclosed by the following gas state change lines
a) 2 adiabatic and 1 isothermic lines.
b) 2 adiabatic, 1 isochoric and 1 isobaric lines.
c) 2 adiabatic and 2 isochoric lines.
d) 2 adiabatic and 2 isobaric lines.
19.
In a four-stroke piston engine, the only "driving" stroke is:
a) firing-expansion
b) exhaust
c) intake
d) compression
20.
The power output of a normally aspirated piston engine increases with increasing altitude at constant Manifold Air Pressure (MAP) and RPM because of the:
a) lower losses during the gas change.
b) lower back pressure.
c) lower friction losses.
d) leaner mixture at higher altitudes.
21.
During climb with constant Manifold Air Pressure (MAP) and RPM indication and constant mixture setting, the power output of a piston engine:
a) decreases.
b) increases.
c) only stays constant if the speed control lever is pushed forward.
d) stays constant.
22.
Smoke detector systems are installed in the
a) engine nacelles.
b) fuel tanks.
c) wheel wells.
d) upper cargo compartments (class E).
23.
The power output of a piston engine can be calculated by:
a) Pressure times arm.
b) Work times velocity.
c) Force times distance.
d) Torque times RPM.
24.
What can be the consequence during a descent with a fully open throttle if the waste gate is seized ?
a) The power of the motor will decrease.
b) The manifold air pressure (MAP) value may exceed the maximum allowed value.
c) The turbine shaft will break.
d) The turbine blades will separate.
25.
The built-in passenger oxygen system be activated by:
a) switching the passenger oxygen ON.
b) switching the diluter demand regulator ON.
c) opening the oxygen-bottle valves.
d) switching the diluter demand regulator and the passenger oxygen ON.
26.
The 'slipstream effect' of a propeller is most prominent at:
a) low airspeeds with high power setting.
b) low airspeeds with low power setting.
c) high airspeeds with high power setting.
d) high airspeeds with low power setting.
27.
The de-icing system which is mostly used for the wings of modern turboprop aeroplanes is:
a) Electrical heating.
b) Thermal anti-icing.
c) Pneumatic boots.
d) Fluid de-icing.
28.
The state in which the breathing oxygen for the cockpit of jet transport aeroplanes is stored is:
a) Gaseous or chemical compound.
b) Liquid.
c) Gaseous.
d) Chemical compound.
29.
The power of a piston engine which will be measured by using a friction brake is:
a) Heat loss power.
b) Indicated horse power.
c) Brake horse power.
d) Friction horse power.
30.
The ventilation system in a fuel tank:
a) can be used to drain the tanks, for daily checks.
b) prevents vapour lock in the fuel lines.
c) prevents low pressure or overpressure in the tank.
d) It prevents a surge in the tank of an iced aeroplane.
31.
A gaseous sensor/responder tube fire sensor is tested by
a) checking the continuity of the system with a test switch.
b) checking the sensor with pressurized gas.
c) heating up the sensor with test power connection.
d) checking the wiring harness for faults but not the sensor.
32.
A radio signal looses strength as range from the transmitter increases, this is called:
a) propagation
b) refraction
c) ducting
d) attenuation
33.
The conditions under which you obtain the highest engine power are:
a) cold and dry air at high pressure.
b) warm and dry air at high pressure.
c) cold and humid air at high pressure.
d) warm and humid air at low pressure.
34.
The ignition system generally used for small aircrafts is a:
a) Battery ignition system.
b) High intensity system.
c) High tension system.
d) Low tension system.
35.
The indication of the fire detection systems is performed by a:
a) warning light.
b) warning light and a warning bell (or aural alert).
c) gear warning.
d) warning bell.
36.
The mechanism to change the propeller blade pitch of modern small piston engine aeroplanes is operated
a) hydraulically by hydraulic fluid.
b) by a mechanical linkage.
c) by an electrical actuator.
d) hydraulically by engine oil.
37.
Fixed-pitch propellers are usually designed for maximum efficiency at:
a) idling
b) take-off
c) full throttle
d) cruising speed
38.
Viscosity is
a) the flow velocity inside the oil lines.
b) Viscosity is the pressure resistance of an oil.
c) the temperature dependence of an oil.
d) the resistance of a gas or liquid to flow.
39.
The kind of compressor normally used as a supercharger is:
a) an axial compressor.
b) a radial compressor.
c) a piston compressor.
d) a hybrid compressor.
40.
In general, in twin-engine aeroplanes with 'constant speed propeller'
a) the oil pressure turns the propeller blades towards smaller pitch angle.
b) the aerodynamic force turns the propeller blades towards higher pitch angle.
c) the spring force turns the propeller blades towards smaller pitch angle.
d) the oil pressure turns the propeller blades towards higher pitch angle.
41.
If the ground wire between the magnetos and the ignition switch becomes disconnected the most noticeable result will be that:
a) the engine cannot be shut down by turning the ignition switch to the "OFF" position
b) the engine cannot be started with the ignition switch in the "ON" position
c) a still operating engine will run down
d) the power developed by the engine will be strongly reduced
42.
On four-stroke piston engines, the theoretical valve and ignition settings are readjusted in order to increase the:
a) overall efficiency
b) compression ratio
c) engine r.p.m.
d) piston displacement
43.
The conditions which can cause knocking are:
a) High manifold pressure and high revolutions per minute.
b) High manifold pressure and low revolutions per minute.
c) Low manifold pressure and high revolutions per minute.
d) Low manifold pressure and high fuel flow.
44.
In computer technology, an output peripheral is a:
a) hard disk drive
b) screen unit
c) diskette drive
d) keyboard
45.
One of the advantages of a turbocharger is:
a) to make the power available less dependent on altitude.
b) that there is no danger of detonation.
c) that there is no torsion at the crankshaft.
d) that is has a better propulsive efficiency.
46.
An asymmetric loading (p-factor) on the propeller exists ..
a) If there is an unbalanced propeller.
b) Only if the 'constant speed propeller' mechanism is broken.
c) If the aeroplane has a large angle of attack.
d) Only for counterrotating propeller
47.
The fuel tanks of aircrafts must be checked for water
a) before the first flight of the day or after a long turnaround time.
b) during refuelling.
c) before each flight.
d) immediately after every refuelling.
48.
In jet aeroplanes the 'thermal anti-ice system' is primarily supplied by
a) turbo compressors.
b) ram air, heated via a heat exchanger.
c) bleed air from the engines.
d) the APU.
49.
The purpose of the blow-in-doors at the air inlets is to:
a) provide the engine with additional air at high power settings and low air speeds.
b) feed cooling air to the engine cowling.
c) serve to increase the relative velocity at the first compressor stage.
d) provide the engine with additional air at high power settings at cruising speed.
50.
If the maximum operating pressure of the oxygen system is exceeded the:
a) passenger oxygen masks will drop down.
b) oxygen is discharged overboard via a safety plug.
c) oxygen becomes unusable for the passengers.
d) oxygen bottles will explode.
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