JAA ATPL Question Bank

010 - AIR LAW AND ATC PROCEDURES 021 - AIRFRAME AND SYSTEMS, ELECTRICS, POWERPLANT, EM. EQUIPMENT 022 - INSTRUMENTATION 031 - MASS AND BALANCE - AEROPLANES 032 - PERFORMANCE - AEROPLANES 033 - FLIGHT PLANNING AND FLIGHT MONITORING 040 - HUMAN PERFORMANCE 050 - METEOROLOGY 061 - GENERAL NAVIGATION 062 - RADIO NAVIGATION 071 - OPERATIONAL PROCEDURES 081 - PRINCIPLES OF FLIGHT - AEROPLANE 091 - VFR COMMUNICATIONS 092 - IFR COMMUNICATIONS

[ATPL TOPICS] AIRFRAME AND SYSTEMS ELECTRICS POWERPLANT EMERGENCY EQUIPMENT

[ATPL SUBTOPICS] Direct current (DC) Alternating current (AC) Semiconductor Basic knowledge of computers Basic radio propagation theory

1 | A component consuming 80 watts at 8 amps would require a supply of: 2 | In an aeroplane utilising a constant frequency AC power supply, DC power is obtained from 3 | Aircraft standard fuses are fitted to: 4 | A 24V, 60 Ah battery is driving a 48 Watts light bulb. Approximately how long would the ba 5 | Two resistors with values of 6 Ohm and 100 Ohm are connected in parallel. Their combined r 6 | Magnetism can be used to generate electricity by converting mechanical energy to electrica 7 | The operating principle of a fuse is: 8 | Bonding is used to protect the aircraft against fire by: 9 | If the power being drawn by a resistor is 100 watts from a 50V supply, what is the resista 10 | The commutator of a DC generator converts: 11 | In the following diagram A, B and C are respectively the: 12 | Recharging an aircraft's battery from an AC system would require: 13 | A rotary valve actuator is in the closed position. Its 'OPEN' limit switch is... and its ' 14 | When a battery is almost fully discharged there is a tendency for the: 15 | With regards to a light aircraft electrical system, where is the generator switch normally 16 | The purpose of a battery protection unit is generally to isolate the battery:

17 | In order that DC generators will achieve equal load sharing when operating in parallel, it 18 | The power dissipated as heat by a resistance R with an applied voltage V carrying a curren 19 | Aircraft systems are almost always: 20 | An aircraft has total services drawing 120 amps, essential services drawing 45 amps and vi 21 | Impedance is: 22 | Consider a battery voltage V, connected to R1 and R2 which are in parallel: If V is 250 vo 23 | A generator is taken Off-line by: 24 | Electrical batteries when connected in parallel provide... amp/hr capacity and... voltage. 25 | The international symbol of electrical power is 26 | The capacity of a battery is expressed in terms of: 27 | A 12 volt battery that has 1 dead cell: 28 | When an electrical circuit is open circuited: 29 | The unit of inductance is: 30 | The inductance of several inductors connected in series can be calculated to be: 31 | The purpose of the voltage regulator is to: 32 | What unit is used to measure potential difference between two points in an electrical circ 33 | True power is measured in: 34 | When fully charged, what is the maximum voltage across a lead-acid cell? 35 | In a supply system which is AC, DC requirements are provided by: 36 | In normal conditions, generator output voltage is arranged to be: 37 | An ammeter indicates a high rate of charge after engine start. This... 38 | Fuses are rated to a value by: 39 | The connection in series of two 12 volt / 40 amp hours batteries, will create a unit with 40 | Usually, in conductive materials: 41 | When carrying out battery condition check using the aeroplane’ s voltmeter: 42 | The total current flow in an electrical circuit with resistors in parallel is equal to... 43 | What are fuses rated in? 44 | Apparent Power is measured in: 45 | An aircraft electrical circuit which uses the aircraft structure as a return path to earth 46 | Voltage is proportional to rate of change of current in a: 47 | In a DC generator circuit the reverse current relay: 48 | Voltage is: 49 | The difference in electrical potential in a circuit is measured in: 50 | When does a generator cut-out open? 51 | On a self-exited DC generator, if the voltage regulator increases the current through the 52 | The capacity of a typical lead acid battery for aviation use is 53 | The power in a direct current circuit is equal to: 54 | The total current in a parallel circuit is equal to: 55 | Voltage is a measure of: 56 | The voltage regulator of a DC generator is connected in: 57 | A simple circuit has 4 amps flowing through a 5 ohm resistor. How much power is being used 58 | The connection in parallel of two 12 volt / 40 amp hours batteries, will create a unit wit 59 | The capacitance of several capacitors connected in series is equal to: 60 | An Electromotive Force (EMF) can be measured with: 61 | A spill of electrolyte from a NiCad battery onto someone's skin should be: 62 | Resistance is expressed in... and the basic SI units for it are... 63 | Voltmeters and ammeters usually indicate: 64 | Current is expressed in... and the basic SI units for it are... 65 | Batteries are rated in: 66 | Which unit is commonly used for reactive power? 67 | What is the purpose of a battery cut-out? 68 | The so called HOT BUSSES or DIRECT BUSSES are: 69 | On an aircraft with an earth return electrical system: 70 | The type of windings commonly used in DC starter motors are: 71 | Consider a battery voltage V, connected to four resistors R1, R2, R3, R4. They are connect 72 | Consider a battery voltage V, connected to three resistors R1, R2, R3. R2 and R3 are in pa 73 | When refuelling an aircraft: 74 | An aircraft has three batteries, each of 12 volts with a 40 Ah capacity, connected in seri 75 | The output voltage of DC generators used in aircraft is normally regulated by: 76 | Which of the following statements best describes two resistors connected in parallel? 77 | What is the purpose of a voltmeter? 78 | When being charged, the specific gravity of the electrolyte in a Ni-cad cell: 79 | A current limiter fuse in a DC generation system is used to: 80 | Voltage is proportional to charge on: 81 | DC generators are rated in: 82 | Obvious disadvantages using Lead-Acid batteries in airplanes are: 83 | The purpose of protecting a circuit against excessive current conditions is: 84 | An aircraft has 3 navigation lights, each rated at 24 watts, which are connected in parall 85 | It may be determined that an aircraft is not properly bonded if: 86 | When two DC generators are operating in parallel, control of load sharing is achieved by: 87 | Consider a battery voltage V, connected to four resistors R1, R2, R3, R4. They are connect 88 | Two 0.03 Henry inductors are placed in series. The resulting inductance is: 89 | An aircraft has a battery with a capacity of 60 Ah. Assuming that it will provide its norm 90 | What efficiency is required in order for a battery to pass a capacity test? 91 | The purpose of bonding is: 92 | Consider a battery voltage V and two resistors (R1 and R2) which are connected in series: 93 | During normal cruise flight conditions a Ni-Cd battery's ammeter shows a high rate of char 94 | When a centre zero ammeter is reading to the left: 95 | A circuit breaker: 96 | The voltage of a fully charged lead-acid battery cell is: 97 | A battery is made up of 5 NiCad cells, each having a voltage of 1.2V and a capacity of 20A 98 | 1 ampere equals: 99 | The advantages of grounding the negative pole of the aircraft structure are:
100 | A 12 volt battery is connected to a 24 watt light bulb. The battery lasts for 10 hours. Wh 101 | 8 volts are applied to a 2 Ohm resistor. What current will flow? 102 | In a multi engined aircraft, how are the ammeters usually arranged? 103 | If you double the EMF, you will: 104 | When a conductor cuts the flux of a magnetic field: 105 | Electrical power is expressed in: 106 | A Ni-cad cell is fully charged. Its on load voltage is: 107 | An earth return electrical system has: 108 | The capacitance of several capacitors connected in parallel can be calculated to be: 109 | Parallel wound motors produce a... starting torque and their speed varies... with load. 110 | The voltage regulator of a DC generator: 111 | R1 and R2 resistances are connected in parallel. The value of the equivalent resistance (R 112 | In aeronautics, the most commonly used batteries are NiCad because... 113 | The difference in electrical potential between two points in a circuit is measured in: 114 | Assume a constant speed DC generator providing a constant output voltage. If the electrica 115 | The purpose of an inverter could be: 116 | In a circuit containing reactive elements, the total current: 117 | An ammeter measures: 118 | A 12 volt battery has a rating of 24 Ah. If fully charged, how long can it supply current 119 | Which of the following is an appropriate substance to use to neutralise the electrolyte fr 120 | If one of the 12 cells of a lead-acid battery is dead, the battery: 121 | What is load shedding? 122 | The voltage regulator of a DC generator is connected in: 123 | A 12 volt lead acid battery has a broken connection in a cell, the battery: 124 | On board present aircraft, the batteries used are-mainly Nickel-Cadmium. Their advantages 125 | When approaching discharge, the characteristics of a battery are as follows: 126 | The primary purpose of bonding the metallic parts of an aeroplane is to: 127 | A bus-bar is: 128 | The detection of a feeder fault on a direct current circuit results in:
1. a
129 | When being charged the specific gravity of the electrolyte in a lead-acid cell: 130 | A 3 microfarad capacitor is in parallel with a 6 microfarad capacitor. What is the combine 131 | 12.5 watts are being consumed by a 2 Ohm resistor. What voltage has been applied? 132 | The on-load voltage of a lead-acid battery is... and is measured using... 133 | A component that provides 115 VAC output after an input of 28 VDC is called: 134 | A 2 Ohm resistor has 3 amps through it. What power is being consumed by the resistor? 135 | Resistors in series act as..., resistors in parallel act as... 136 | Consider a battery voltage V, connected to three resistors R1, R2, R3. R2 and R3 are in pa 137 | In an electrical circuit with 28V, 7A and 4ohms, the dissipated power is equal to: 138 | If the frequency of the supply in a series capacitive circuit is increased, the current fl 139 | Overloading an electrical circuit causes the fuse to blow. This: 140 | One essential law of magnetism is: 141 | There is a maximum amount of flux which can be carried by a piece of ferromagnetic materia 142 | Electrical services are connected in parallel. When some are switched off: 143 | Voltage is expressed in... and the basic SI units for it are... 144 | Switching a DC alternator off is achieved by: 145 | The SI unit used for measuring... is... 146 | What type of electrical circuit is usually protected using a current limiter? 147 | Consider a battery voltage V, connected to three resistors R1, R2, R3. R2 and R3 are in pa 148 | What is the purpose of an ammeter? 149 | If a DC circuit with a total resistance of 2 Ohms has 12 volts DC applied, then the result 150 | Consider a battery voltage V, connected to R1 and R2 which are in parallel: If V is 12 vol 151 | When AC generators are operated in parallel, they must be of the same: 152 | The oil system of an IDG will be: 153 | Typical aircraft AC system run on: 154 | A unit that converts electrical DC into AC is: 155 | When loaded, an induction motor: 156 | Which of this circuit diagram symbols represents an auto-transformer? 157 | What is the purpose of a load sharing circuit? 158 | The main purpose of a Constant Speed Drive unit is to: 159 | In a three phase star connected power system, to calculate phase voltage from line voltage 160 | A short circuit on a single pole electrical circuit could be caused by: 161 | A CSD unit which has been disconnected in flight: 162 | If the supply frequency to an inductor is decreased, the reactance... and the current... 163 | In a parallel AC supply system, the load is measured in: 164 | The output frequency of an AC generator depends on: 165 | A rectifier is a unit that 166 | The reason for using inverters in an electrical system is. 167 | If a circuit breaker trips, which of the following actions is acceptable? 168 | On an earth return aircraft wiring circuit: 169 | The purpose of static wick dischargers is to: 170 | In a frequency wild AC supply system, a constant frequency can be derived: 171 | When an underspeed fault is detected on an AC generator connected to the aircraft AC busba 172 | The output voltage of a transformer is twice as high as the input voltage. The transformat 173 | To convert from an RMS value to an amplitude it is necessary to: 174 | The speed of an asynchronous four-pole motor fed at a frequency of 400 Hertz is: 175 | A star connected three phase generator can be used for: 176 | Reversing two phases of a three phase motor will: 177 | The purpose of a CSDU is to: 178 | The rectification of a three phase supply can be effected by using a formation of... recti 179 | A 3 phase AC generator has 3 separate stator windings spaced at: 180 | A carbon pile voltage regulator: 181 | Generator paralleling through busbars is done to assure that: 182 | The most commonly used circuit protection device in modern aircraft is a 183 | Electrical bonding of an aircraft is used to:
1. protect the aircraft agains
184 | When loaded, a synchronous motor: 185 | Static electricity in an aircraft is a fire hazard because: 186 | A brushless AC generator output is tapped: 187 | When a persistent over excitation fault is detected on only one AC generator, the protecti 188 | When AC generators are operated in parallel: 189 | A star wound generator, can provide how many different voltage(s): 190 | The purpose of static wick dischargers is to: 191 | On starting, in a brushless AC generator with no commutator rings, the generator is activa 192 | In a solely inductive circuit, what is the relationship between current and voltage? 193 | Can frequency wild AC generators be operated in parallel? 194 | In flight, if the constant speed drive (CSD) temperature indicator is in the red arc the: 195 | A " trip-free" type circuit breaker is a circuit protection device which: 196 | It may be determined that an aircraft is not properly bonded if: 197 | In which of the following circuits is a current limiter most likely to be fitted? 198 | A carbon pile voltage regulator controls generator output using: 199 | A sine wave has a peak-to-peak voltage of 400 V. Its: 200 | In a capacitive AC supply system, if frequency reduces: 201 | An auto-transformer: 202 | For high power applications, an AC motor driving a DC generator can be used as: 203 | Circuit breakers protecting circuits may be: 204 | In order to produce an alternating voltage of 400 Hz, the number of pole pairs required in 205 | In what kind of an electrical machine might a squirrel cage be found? 206 | A constant speed drive unit mounted side by side with an AC generator is known as: 207 | In a 3 phase delta connected AC generator: 208 | In a generator, the Constant Speed Drive (CSD):
1. may be disconnected from
209 | Which of the following is a symptom of an open circuit on one phase in a three phase gener 210 | In the event of mechanical failure in the generator, the CSDU is protected by: 211 | In an inductive circuit, current: 212 | Static dischargers:
1. are used to set all the parts of the airframe to the
213 | Bonding is a method of: 214 | The aviation industry standard that has evolved for constant frequency aircraft is 115/200 215 | The efficiency of modern transformers is: 216 | If it is necessary to disconnect a CSDU from an engine how is this achieved? 217 | The frequency of the current provided by an alternator depends on... 218 | In a carbon pile voltage regulator, when the pile is compressed its resistance... and the 219 | Oil for a CSDU is supplied by: 220 | In an alternator rotor coil you can find: 221 | A generator has a 4 pole pair field electromagnet on its rotor. It has 3 phase output wind 222 | The purpose of a CSDU is to: 223 | An aircraft without constant speed generator drive systems or VSCF's will have a... 224 | A transformer has 150 turns on the primary winding with 240 volts applied. The secondary w 225 | High circulating currents on the real load of paralleled AC generators is the result of: 226 | A magnetic circuit breaker: 227 | A reverse current cut-out operates based on the difference between: 228 | The purpose of a voltage regulator is to control the output voltage of the: 229 | On the flight deck, an oil operated CSD unit is normally provided with means of monitoring 230 | How is a low reactive load on one AC generator, of paralleled AC generators, compensated f 231 | A squirrel cage would be found in: 232 | A thermal circuit breaker: 233 | The most common voltage / frequency used in jet transport A/C is: 234 | A BTB is: 235 | During normal operation of a split bus bar AC supply system, the batteries are connected t 236 | The CSDU... should be operated with the engine... 237 | If the oil temperature gauge of the CSD is in the red what would action is required? 238 | A transformer has 500 turns of wire on the primary winding and 50 turns of wire on the sec 239 | The purpose of a TRU is to convert: 240 | A single phase AC stator with a shaded pole can be used to: 241 | A multi engine aircraft with one generator per engine has: 242 | What is the shaft RPM of a synchronous AC motor connected to a 3 phase 200 Hz supply? 243 | In an aeroplane equipped with a DC main power system, AC for instrument operation may be o 244 | When selecting a fuse for an aircraft circuit the governing factor is: 245 | Which unit is commonly used for reactive power? 246 | What happens to the current in a series capacitive circuit when frequency increases? 247 | Generators are usually: 248 | The moving part of an AC generator is: 249 | When paralleling alternators, reactive loads are controlled by: 250 | A transformer converts: 251 | When illuminated, what is indicated by the warning lights of an AC generators constant spe 252 | A Constant Speed Drive aims at ensuring 253 | Real load sharing in a parallel AC system is achieved by: 254 | In a perfect capacitor, as frequency increases, impedance: 255 | What is the purpose of a commutator on an AC generator? 256 | In an AC circuit as a whole, current equals: 257 | Assuming a CSD fault is indicated, the CSD should be disconnected: 258 | The most widely used AC frequency in aircraft is: 259 | If two constant frequency AC generators are operating independently, then the phase relati 260 | Power factor is defined as: 261 | The output frequency of a 3 phase AC generator with a shaft RPM of 8,000 is: 262 | The function of a CSD in an AC generating system is to: 263 | The function of the Generator Breaker is to close when the voltage of the: 264 | Two AC signals that have equal amplitude and frequency may not be at the same point in the 265 | As regards the Generator Control Unit (GCU) of an AC generator, it can be said that:
266 | A rectifier converts: 267 | To ensure correct load sharing between AC generators operating in parallel: 268 | Paralleled AC alternators, when fitted to an aircraft supply system will have: 269 | In a star connection, line voltage equals... and line current is equal to... 270 | In a generator circuit, the circulating current is: 271 | A generator is 'on line': 272 | What influences the speed of rotation of a synchronous motor? 273 | Load shedding means: 274 | Which of this circuit diagram symbols represents a relay? 275 | A fuse which is used to protect an electrical circuit: 276 | For a star connected AC generator, which of the following statements is true? 277 | The purpose of a split field motor is to allow it to be run: 278 | Real load sharing is achieved by: 279 | Ferromagnetic materials are good at carrying magnetic flux because they have a: 280 | Which of the following statements regarding external power is true for most airliners? 281 | When a persistent top excitation limit fault on an AC generator connected to the mains wit 282 | An example of a motor providing a weak rotating field by a single phase AC supply is: 283 | kVAR is a unit which is used for: 284 | The most common three phase alternator connection is: 285 | To operate in parallel without damage occurring, generators must have: 286 | On detection of a persistent overvoltage/fault on an AC generator connected to the aircraf 287 | The voltage output of a shunt wound generator: 288 | Real load sharing in an AC power system is achieved by: 289 | Most practical alternators are designed with a... 290 | The most widely used electrical frequency in aircraft is: 291 | An inverter converts: 292 | The main difference between a fuse and a circuit breaker is that: 293 | An AC generator driven by a CSD unit: 294 | How are fuses rated? 295 | A star wound generator, with a TRU attached, could be designed to provide... different vol 296 | A compound wound generator is one in which: 297 | Synchronising bus bars are used: 298 | The output of an AC generator is rated in: 299 | A diode is: 300 | A transistor is a: 301 | Which component is presented in the following diagram? 302 | This symbol represents: 303 | What type of transistor is represented by the following symbol. What are the terminals A,B 304 | A transistor has... current paths which are... 305 | Which of the following materials are used for the manufacturing of semiconductors? 306 | A relay is: 307 | A diode: 308 | A relay is: 309 | What are terminals A,B and C in the following diagram. 310 | Semiconductors are manufactured from: 311 | A junction diode: 312 | The letters PNP when related to a transistor denote: 313 | How many diodes are required in a three phase full wave bridge rectifier? 314 | A transistor has: 315 | The logic symbol shown represents (assuming positive logic): 316 | An AND gate is sometimes referred to as: 317 | In electronic terms, what is a flip-flop? 318 | What does the following symbol in an electronic circuit represent?: 319 | What logic function is achieved by the following circuit, where A and B are the inputs and 320 | For this diagram, choose the answer which correctly states the outputs from the logic circ 321 | What does the following symbol represent? 322 | What is the proper name for an " all or nothing" gate? 323 | What does the following truth table represent? 324 | Inputs and outputs of logic gates are generally: 325 | In computer technology, an EPROM is:
1. a read-only memory
2. a write m
326 | The following symbol represents an... logic gate. 327 | For this diagram, choose the answer which correctly states the outputs from the logic circ 328 | Which of the following are logic gates? 329 | What does the following truth table represent? 330 | The symbol on the picture represents: 331 | This symbol is: 332 | What is the name of the following logic gate? 333 | If all the inputs and outputs to and from an OR gate are inverted, the equivalent logic fu 334 | Which logic gate is the equivalent of the circuit below with inputs A and B and output C? 335 | Because of the input/output relationship of an AND gate, it is often referred to as the: 336 | Which gate has the following truth table? 337 | In which of the following logic gates are contained the six most common gates? 338 | For this diagram, choose the answer which correctly states the outputs from the logic circ 339 | The logic symbol shown represents an... gate. 340 | An OR gate is sometimes referred to as: 341 | An EXCLUSIVE OR gate with only two inputs, which gives a high output when either input is 342 | The following symbol represents ... logic gate. 343 | A logic gates function is to: 344 | The smoke detection in the aircraft cargo compartments is carried out by four sensors: C1, 345 | In computer technology, an output peripheral is a: 346 | For this diagram, choose the answer which correctly states the outputs from the logic circ 347 | The following symbol represents an... logic gate. 348 | The following symbol represents an... logic gate. 349 | What is an any or all gate? 350 | In computer technology, a storage peripheral is a: 351 | The following symbol represents an... logic gate. 352 | Because of the input/output relationship of an OR gate, it is often referred to as the: 353 | If a logic gate is referred to as an 'All Or Nothing' gate it is: 354 | In computer technology, an input peripheral is a: 355 | The function of a NOT logic gate within a circuit is to: 356 | A bar above a logic gate input letter indicates: 357 | Which logic gate is equivalent to the following combination: 358 | For this diagram, choose the answer which correctly states the outputs from the logic circ 359 | The VHF direction finder uses the following wavelengths: 360 | If the strength of a radio signal decreases away from the transmitter, this effect is call 361 | In aviation, the reflection on ionosphere layers phenomenon is used in the following frequ 362 | A radio signal has a frequency of 225MHz and is transmitted through a typical di-pole aeri 363 | The Distance Measuring Equipment (DME) uses the following wavelengths: 364 | The Instrument Landing System (ILS) uses the following wavelengths: 365 | Which statement is true? 366 | The skip zone of HF-transmission will increase when the following change in circumstance o 367 | The wavelength of a radio signal transmitted at the frequency of 75 MHz is: 368 | Skin effect: 369 | The frequency at which sky waves should least affect reception? 370 | The VHF Omnirange (VOR) uses the following wavelengths: 371 | The minimum airborne equipment required for operation of a VHF direction finder is a: 372 | The high Altitude Radio Altimeter uses the following wavelengths: 373 | For weather radar, the frequency 9375 MHz in X Band is preferable to C Band because: 374 | Skip distance is the: 375 | MF fading is most common: 376 | Complete the following statement:... radio signals have a... range by... wave over... than 377 | An aircraft transmits on HF from an altitude of 16000ft to an ATC which has its receiver a 378 | The Low Altitude Radio Altimeter uses the following wavelengths: 379 | The wavelength of a non-directional beacon (NDB) at a frequency of 300 kHz is: 380 | The airborne weather radar uses the following wavelengths: 381 | In aeronautics, the frequency range in which the reflection against the ionosphere layers 382 | A Beat Frequency Oscillator: 383 | The secondary Surveillance Radar (SSR) uses the following wavelengths: 384 | The wavelength of a radio transmitted on frequency 121.95 MHz is: 385 | The Fan Markers uses the following wavelengths: 386 | What frequency band would a signal of 40cm wavelength belong to? 387 | A radio signal looses strength as range from the transmitter increases, this is called: 388 | The Microwave Landing System (MLS) uses the following wavelengths: 389 | In the propagation of MF waves, the phenomenon of FADING is particularly found: 390 | An HF transmitter is tuned to a frequency that refracts from the E layer in the Ionosphere 391 | The Automatic Direction Finder uses the following wavelengths: 392 | When an LF radio wave passes over the earth's surface it: 393 | By day the ionosphere consists of: 394 | In the response curve of an amplifier, the bandwidth is: