Câu 1:
In an ARINC 429 Word label-representing heading is 320, this is represented in bits 1- 8 as
- a) 01011001
- b) 00001011
- c) 01101000
Câu 2:
The terminal of transistor with an arrow is named
- a) Base
- b) Collector
- c) Emitter
Câu 3:
A hexadecimal is a number to base
Câu 4:
Which systems are operated by transmitting controlled EM radiation?
- a) Radio communication systems
- b) Navigation systems
- c) Radio communication and navigation systems
Câu 5:
The operational amplifier is always a differential amplifier with
- a) One input and one output
- b) One input and two outputs
- c) Two inputs and one output
Câu 6:
The components installed in aircraft are subject to
- a) Build regulations
- b) Disassembly regulations
- c) Installed regulations
Câu 7:
Servo systems can be loosely divided into
- a) Two different types
- b) Three different types
- c) Four different types
Câu 8:
How many display computers on aircraft?
- a) Two display computers
- b) Three display computers
- c) There are at least two display computers. Large aircraft have a third display computer for redundancy
Câu 9:
How to identifying components sensitive to ESD?
- a) By a label on component
- b) By refer to associated document
- c) All aircraft components are ESD components
Câu 10:
An ARINC 429 Binary Coded Decimal word occupies word bits
Câu 11:
An aircraft system that, should it fail due to a software error, would cause a slight increase in crew workload, has a software level of
- a) Level D
- b) Level B
- c) Level C
Câu 12:
DRAM
- a) requires a refreshing charge
- b) memory is stored when power supply is removed
- c) it does not require a refreshing charge
Câu 13:
A CRT display
- a) is monochrome
- b) has three colours only
- c) has infinite colours
Câu 14:
In an ARINC 429 digital word bit number 32 is used for
- a) terminating the data field
- b) identifying word type
- c) checking parity
Câu 15:
Which component usually can not be integrated due to their large space requirements?
- a) Capaciors
- b) Inductances
- c) Transistors
Câu 16:
The two groups indicators in the cockpit are
- a) Flight surveillance and Engine surveillance
- b) Aircraft surveillance and Engine surveillance
- c) Flight surveillance and Aircraft surveillance
Câu 17:
In the ARINC 429 digital information transfer system, data may travel in
- a) both directions on the same bus simultaneously
- b) one direction only
- c) both directions on the same bus sequentially by time multiplexing
Câu 18:
Which software only authorized personal may modify?
- a) Software which is classified in level A
- b) Software which is classified in level B
- c) Software which is classified in level C
Câu 19:
Fibre optic cables
- a) are immune to EMI (Electromagnetic Interference)
- b) attenuate EMI
- c) are susceptible to EMI
Câu 20:
For printed circuit boards. Which material are also used for specialized applications?
- a) Polyester, Teflon
- b) Polyester and ceramics
- c) Polyester, Teflon and ceramics
Câu 21:
What is the base material of a PCB?
- a) Insulator
- b) Semiconductor
- c) Conductor
Câu 22:
Two transistor types are
- a) NPN transistor and PNP transistor
- b) NPP transistor and PPN transistor
- c) NNP transistor and PNN transistor
Câu 23:
A disadvantage of a fibre optic cable is
- a) Couplings susceptible to ingress of fluid
- b) Shallow bend radius allowed
- c) Terminations require special care
Câu 24:
What is EMI (Electromagnetic interference)?
- a) is the minimum interference allowable for a particular transmission on a bus or wire
- b) is the maximum interference allowable for a particular transmission on a bus or wire
- c) is the maximum interference allowable for a particular reception on a bus or wire
Câu 25:
A Colour-CRT contains
- a) three terminals
- b) three cathodes
- c) three anodes and one cathode
Câu 26:
Who can sign for a software update?
- a) Design organization or the aircraft manufacturer
- b) Chief pilot
- c) Engineer
Câu 27:
When the voltage that represents a logic 1 state is less than the voltage that represents a logic 0 state, the logic being used is
- a) positive
- b) negative
- c) either positive or negative
Câu 28:
What is electrostatic discharge?
- a) Electrostatic discharge is always present in our environment, consequently also at our place of work
- b) Electrostatic discharge is not present in our environment
- c) Electrostatic discharge occurs whena. the ground lead on a wrist strap touches the skin
Câu 29:
The inputs of Display computers are:
- a) Navigation data, Auto Flight System data and Display Unit
- b) Engine data and Auto Flight System data and Display Unit
- c) Navigation data, Auto Flight System data, Engine data and Data from various aircraft systems.
Câu 30:
What sort of gate requires two negative input voltages to operate?
Câu 31:
Electrostatic discharge can be
- a) Non destructive
- b) Little destructive
- c) Very destructive
Câu 32:
When a diode is forward biased the
- a) Positive lead is connected to both N and P type
- b) Positive lead is connected to the P type and negative to the N type.
- c) Positive lead is connected to the N type and negative to the P type
Câu 33:
The dimensions of operational amplifiers are
- a) Very large
- b) Medium
- c) Very small
Câu 34:
Why does an ARINC databus system send data to LRUs in series?
- a) Saves weight
- b) More information can be sent
- c) Takes less time
Câu 35:
How is the word label 206 written in ARINC 429?
- a) Binary 11000110
- b) Octal 01100001
- c) Decimal 206
Câu 36:
The damage result of ESD is
- a) Always reparable
- b) Always irreparable
- c) Not effect to system
Câu 37:
To transport and dispatch ESD components
- a) using conductive material
- b) using non-conductive material
- c) using semiconductive material
Câu 38:
An aircraft system allocated a software level of C that, should it fail due to a software error, may cause
- a) injuries to a large proportion of occupants
- b) injuries to some occupants
- c) no injuries to occupants
Câu 39:
Where is the parity bit installed in a data word?
- a) Front
- b) End LSB
- c) End MSB
Câu 40:
In a NPN transistor the P is the
- a) Collector
- b) Emitter
- c) Base
Câu 41:
ARINC 629 is used for
- a) emergency only
- b) a backup to ARINC 429
- c) supports a multi-transmitter and bidirectional approach to digital data communications
Câu 42:
Static electricity is created as soon as
- a) two materials are rubbed together
- b) two materials are rubbed together, are separated
- c) two materials are rubbed together, are separated or are in moving in some kind of fluid or gaseous form
Câu 43:
RZ bi-polar modulation consists of bits which are one of __________ states?
Câu 44:
An AND gate with inverted inputs and an inverted output is equivalent to
- a) an OR gate
- b) a NOR gate
- c) a NAND gate
Câu 45:
Which indicator is belongs to Aircraft surveillance group?
- a) Position indication
- b) Altimeter
- c) Fuel indicator
Câu 46:
EMC is acronym for
- a) Electrical Monitoring Center
- b) electromagnetic compability
- c) Electrical Management Computer
Câu 47:
Which software can be done by maintenance personnel, but only if respective documentation is available?
- a) Software which is classified in level A
- b) Software which is classified in level B
- c) Software which is classified in level E
Câu 48:
To ensures Aircraft Components they do not exceed their fixed tolerance values you perform
- a) Testing of components
- b) Remove compnent and send to shop
- c) Visual check
Câu 49:
A BITE-Test (Built In Test Equipment) is
- a) is a test that runs when the equipment is switched on and checks the hardware (Power-Up Test)
- b) is a test that check the system operation
- c) is a test that checks the software
Câu 50:
All modern aircraft use
- a) Electronic Instrument Display Systems
- b) Analoge Indicator
- c) Analoge technology
Câu 51:
With INVERTER function. What is correct statement?
- a) If the input signal is a logical 1. The output signal is also a logical 1
- b) If the input signal is a logical 0. The output signal is also a logical 0
- c) If the input signal is a logical 1. The output signal is a logical 0 and vice versa
Câu 52:
In ARINC 429 data field is bits 11 to 28. If the bits 11 to 18 had pad bits, the L.S.B. Of the data would be
- a) Bit 11
- b) Bit 18
- c) Bit 19
Câu 53:
To connect an LRU to the data bus
- a) a terminal controller and interface module only is required
- b) current mode coupler, terminal controller and a production break is required
- c) a current mode coupler, serial interface module and terminal controller is required
Câu 54:
To function, i.e. conduct, a junction diode made of silicon requires a forward bias of at least
- a) 0.2 V
- b) 1.41 V
- c) 1 V
Câu 55:
For Aircraft Components. The specification of the appliance describes
- a) its Technical Standard Order (TSO)
- b) Its Joints Technical Standard Order (TSO)
- c) Its Technical Standard Order (TSO) for the American area, or Joint TSO for the European area
Câu 56:
Three different colours which A picture is composed are
- a) green, blue and yellow
- b) green, yellow and red
- c) red, green and blue
Câu 57:
What kind of light is used in a fibre optic systems?
- a) Infrared
- b) Visible
- c) Ultraviolet
Câu 58:
Software Level B failure is defined as
- a) Minor
- b) Major
- c) Hazardous
Câu 59:
All Monitors for EIS
- a) are same type in all aircrafts
- b) are same type in an aircraft
- c) are difference type in an aircraft
Câu 60:
An LCD display has the advantage over a CRT display of a
- a) low energy consumption
- b) temperature sensitive
- c) the fluid might freeze
Câu 61:
The static load is stored in those material which are
- a) Non-conductive and tend to look for the nearest way to discharge
- b) Conductive and tend to look for the nearest way to discharge
- c) No special precautions are required
Câu 62:
An A/D (Analogue/Digital) converter converts
- a) A continuous voltage signal, or analog signal into a multi-bit digital word
- b) A continuous voltage signal into a multi-bit digital word
- c) Discrete signal into a multi-bit digital word
Câu 63:
What is the software?
- a) the program of the arithmetic process in the computer
- b) the program of the logic process in the computer
- c) the program of the arithmetic and logic process in the computer
Câu 64:
What is the software?
- a) Software is an order of instructions that tells how to process data
- b) Software is a common word which is used to describe all kinds of programms
- c) Software is a programm
Câu 65:
Which equipments influence the environment by electromagnetic radiation?
- a) All electric/electronic equipments
- b) All electric equipments
- c) All electronic equipments
Câu 66:
The upper center display shows
- a) Alerts from various aircraft systems if something is out of limit
- b) Aircraft System data
- c) The information about the activities of the auto flight system
Câu 67:
The use of mobile phones is not permitted at any time in flight due to
- a) they can interfere with an aircrafts electric systems
- b) they can interfere with an aircrafts electronic systems
- c) they can interfere with all aircrafts systems
Câu 68:
Personnel performing work on ESD components and devices must
- a) assuring that suitable grounding techniques are applied to personnel
- b) assuring that suitable grounding techniques are applied to device
- c) assuring that suitable grounding techniques are applied to set both personnel and the device with the same potential
Câu 69:
Which mode deflects the electron beam along the shape of the symbols to be displayed?
- a) stroke scan mode
- b) raster scan mode
- c) stroke scan mode and raster scan mode
Câu 70:
The sawtooth principle uses
- a) a sawtooth created by the converter and compates it with the output voltage
- b) a sawtooth created by the converter and compates it with the input voltage
- c) a sawtooth created by the converter and compates it with the input current
Câu 71:
What system uses base 8?
- a) ARINC 429, in dataword labels only
- b) ARINC 573
- c) ARINC 629
Câu 72:
Personnel performing work on ESD components and devices must have
- a) ESD tools
- b) A good knowledge of the procedural guide−lines pertaining to ESD
- c) Protect
Câu 73:
HIRF is acronym for
- a) Heavily Ionised Radio Frequencies
- b) High Intensity Radiated Field
- c) High Intensity Radio Frequencies
Câu 74:
The rectifier diodes are:
- a) Primarily used for electrical power supply devices
- b) Mainly used in communication technology
- c) Used in rectifier circuits for large power outputs
Câu 75:
Disadvantages of LCD is
- a) Flat
- b) High energy consumption
- c) Temperature sensitive
Câu 76:
Aircraft Components test procedures and the limitations are fixed in
- a) RTCA Document DO−160C
- b) Eurocae document ED−14C
- c) RTCA Document DO−160C, or in Eurocae document ED−14C
Câu 77:
Software Level A failure is defined as
- a) No Effect
- b) Catastrophic
- c) Major
Câu 78:
ARINC 629 is
- a) half duplex
- b) full duplex
- c) simplex
Câu 79:
When mixing Red and Green colours get
- a) Cyan colour
- b) Yellow colour
- c) Magenta colour
Câu 80:
The Electrostatic discharge can be
- a) extremely fast
- b) full of energy
- c) be extremely fast and full of energy
Câu 81:
Which following components are integrated in ICs?
- a) Transistors, Diodes, Resistors and Capaciors
- b) Transistors, Diodes, Resistors and Inductances
- c) Transistors, Diodes, Inductances and Capaciors
Câu 82:
An ARINC 629 stub cable
- a) connects single directional data between the LRU and current mode coupler
- b) connects bi-directional data between the LRU and current mode coupler
- c) connects bi-directional data between two LRUs
Câu 83:
Which informations are displayed on the Electronic Flight Instruments?
- a) The navigation data
- b) The navigation data and the information about the activities of the auto flight system
- c) The information about the activities of the auto flight system
Câu 84:
Which type of memory that the information stored is lost as soon as the power supply is switched off?
Câu 85:
A simplex system has
- a) one transmitter, one receiver
- b) a bus controller and separate controller
- c) one transmitter, many receivers
Câu 86:
The Base of Binary Number System is
Câu 87:
What is the effect of a level A software failure?
- a) Significant reduction in safety margins
- b) Loss of aircraft and / or fatalities
- c) Large reduction in safety margins
Câu 88:
The PCBs have been a popular medium for the installation of electronic components since
- a) The early of 1950s
- b) The 1970s
- c) The 2000s
Câu 89:
A ramp generation A/D converter compares
- a) the unknown input voltage to a D/A with output voltage
- b) the certain input voltage to a D/A connected as a ramp generator
- c) the unknown input voltage to a D/A connected as a ramp generator
Câu 90:
What are Integrated Circuits?
- a) Integrated Circuits are conections of several electronic components by wiring
- b) Integrated Circuits are arrangements of several electronic components in a common housing
- c) Integrated Circuits are arrangements of semiconductor layers
Câu 91:
Advantages of CRT is
- a) Coloured multifunctional displays
- b) Light weight
- c) Low power consumption
Câu 92:
The advantage of DRAM over SRAM is
- a) Are cheaper to manufacture
- b) Has a larger storage capacity per chip area
- c) They operate slower
Câu 93:
Die Check Sum
- a) is the sum of digits retrieved via the software
- b) is the sum of digits retrieved via the software but which can not detect faults in the memory
- c) is the sum of digits retrieved via the software and which can detect faults in the memory
Câu 94:
Software Level D failure is defined as
- a) Hazardous
- b) Minor
- c) No Effect
Câu 95:
What precautions are required when removing ESDs equipment?
- a) No special precautions are required
- b) Keep one hand on the airframe
- c) Assuring that suitable grounding techniques are applied to set both personnel and the device with the same potential
Câu 96:
What sort of gate requires two positive voltages to operate?
Câu 97:
The Inverter (NOT-Function)
- a) inverts the input signal
- b) is called a boolean complement
- c) inverts the input signal. It is also called a boolean complement
Câu 98:
Usually ICs are made from
- a) Very pure Silicon
- b) Very pure Germanium
- c) Impure Silicon
Câu 99:
What are the disadvantages of integrated circuits?
- a) Small housing and therefore the small surface
- b) ICs can not be repaired
- c) Small housing and therefore the small surface, ICs can not be repaired
Câu 100:
A Printed Circuit Board (PCB) is constructed of a plastic laminate which has bonded to one or both sides
- a) a thick sheet of copper
- b) a thin sheet of copper
- c) various thicknesses of copper
Câu 101:
Which components are form a display unit
- a) Cathod ray tube and Symbol Generator Unit (SGU)
- b) Cathod ray tube and symbol generator
- c) Cathod ray tube and Display Management Computer (DMC)
Câu 102:
If the arrow points outside the transistor
- a) It is a NPN transistor
- b) It is a PNP transistor
- c) It is a NPN or PNP transistor
Câu 103:
Which indicator is belongs to Flight surveillance group?
- a) Heading indicator
- b) Position Indication
- c) EGT indicator
Câu 104:
What does EMC (electromagnetic compability) mean?
- a) meaning units will not adversely affect one another
- b) meaning units will affect one another
- c) the maximum interference allowable for a particular transmission on
Câu 105:
The output of a NOT gate is logic 1. The input is
- a) logic 0
- b) logic 1
- c) both logic 0 and 1
Câu 106:
Differential transmitters are used to
- a) Add or subtract angles
- b) Add or subtract two electrical signals
- c) Increase the operating speed of the synchro receiver
Câu 107:
An LCD display has the advantage over a CRT display of a
- a) temperature sensitive
- b) the fluid might freeze
- c) long lifespan
Câu 108:
The lower center display unit is called
- a) System display
- b) Engine Indication display
- c) Warning display
Câu 109:
A multi-layer PCB has
- a) Two or more layers on one or both sides
- b) One layer on either side
- c) Two or more layers connected in series
Câu 110:
TX is the abbreviation for a
- a) torque receiver
- b) control transformer
- c) torque transmitter
Câu 111:
An ARINC 429 bus uses
- a) a single twin cable for each transmitter
- b) a twisted shielded pair of wires
- c) two bi-directional twin, sheathed and earthed wires
Câu 112:
Which generation of display unit are installed since 90’s
- a) LCD display units
- b) Simple cathod ray tubes
- c) Analogue Display Units
Câu 113:
Which following form a computer?
- a) Hardware and Processor
- b) Program and Software
- c) Hardware and Software
Câu 114:
What is the major advantage of integrated circuits?
- a) Very high density of the components
- b) They are quit resistant to mechanical stress
- c) They are very cheap
Câu 115:
CRT’s are used in
- a) CDU’s and EIS or IDS
- b) CDU’s, EIS or IDS and Weather-Radar Displays
- c) EIS or IDS and Weather-Radar Displays
Câu 116:
The inverting input of operational amplifier is usually designated with
- a) A plus sign
- b) A minus sign
- c) A minus output
Câu 117:
If forward bias is increased from zero on a p-n junction, a rapid increase in current flow for a relatively small increase in voltage occurs.
- a) When the flow of minority carriers is sufficient to cause an avalanche breakdown
- b) When the depletion layer becomes larger than the space charge area
- c) Only after the forward bias exceeds the potential barrier
Câu 118:
For logic AND gate, the output has a logic 0 if
- a) All inputs have a logic 0
- b) One or more inputs have a logic 0
- c) All inputs have a logic 1
Câu 119:
Advantages of LCD are
- a) low energy consumption and good illuminated
- b) good illuminated and temperature sensitive
- c) low energy consumption and temperature sensitive
Câu 120:
At low ambient temperatures, an LCD screen
- a) is slower to update as data changes
- b) viewing angle becomes larger
- c) loses contrast
Câu 121:
Which mode is used for background indications like the blue/brown picture from the artificial horizon?
- a) stroke scan mode
- b) raster scan mode
- c) stroke scan mode and raster scan mode
Câu 122:
Which Display Unit indicate the data of naviagtion system?
- a) Primary Flight Display (PFD)
- b) Navigation Display (ND)
- c) System Display (SD)
Câu 123:
What generation of display unit are installed in the early 80’s
- a) LCD display units
- b) Simple cathod ray tubes
- c) Display units
Câu 124:
A junction diode
- a) Is similar to a vacuum diode but cannot rectify
- b) Has one p-n junction
- c) Can handle only very small currents
Câu 125:
A typical Electronic System has the following components
- a) Display Computers, Display Units and Control Panels
- b) Display Computers, Display Units and Keyboards
- c) Display Computers, Display Units and Mouse
Câu 126:
Each digital LRU (Line Replaceable Unit) consists of the
- a) Hardware and Software
- b) Hardware and Programm
- c) Hardware and Memory
Câu 127:
Which software also known as Application Software?
- a) The Core Software
- b) Data Base Software
- c) The Operational Software
Câu 128:
ARINC 429 SDI word format is at bits
Câu 129:
How many bytes can be carried in a 32 bit word?
- a) 8 bytes
- b) 32 bytes
- c) 4 bytes
Câu 130:
HIRF (high intensity radiated field) is
- a) the zone of high radiation which is caused by environment
- b) the zone of high radiation which is caused by lightning
- c) the zone of high radiation which is caused by equipment such as weather radar
Câu 131:
To prevent any charging of personnel, tools and workbench
- a) No special precautions are required
- b) Application of static neutralizers
- c) Keep one hand on the workbench
Câu 132:
To keep EMI (Electromagnetic interference) within limits
- a) Good grounding techniques must be provided for the shielding of antenna
- b) Good grounding techniques must be provided for the shielding of screened wires as the shielding may act as an antenna
- c) Good grounding techniques must be provided for the shielding of screened wires
Câu 133:
For logic NAND gate (Not-AND-Gate), the output have logic 0 if
- a) All inputs have a logic 0
- b) All inputs have a logic 1
- c) One input has a logic 1
Câu 134:
What is used for the power of 10?
- a) Binary.
- b) Decimal.
- c) Octal
Câu 135:
Disadvantages of CRT are
- a) limited lifespan and temperature sensitive
- b) thermal and temperature sensitive
- c) limited lifespan and high power consumption
Câu 136:
For the intrinsic conductivity of diodes
- a) At 0 degrees Kelvin, a semiconductor is a non-conductor
- b) At 0 degrees Celsius, a semiconductor is a non-conductor
- c) At 0 degrees Kelvin, a semiconductor is a conductor
Câu 137:
An aircraft system allocated a Criticality Category of Hazardous has a Software Level of
- a) Level A
- b) Level C
- c) Level B
Câu 138:
If the new aircraft component is critical to flight safety
- a) the examination is repeated
- b) the examination is repeated in reverse
- c) the examination is done after install
Câu 139:
If a data message is made up of 1s and 0s, it is.
- a) analogue
- b) binary
- c) digital
Câu 140:
Which mode deflects the electron beam in lines across the screen?
- a) stroke scan mode
- b) stroke scan mode and raster scan mode
- c) raster scan mode
Câu 141:
Usually the following components are integrated in ICs (Integrated Circuit)
- a) Semiconductors (Transistors, Diodes), Resistors
- b) Semiconductors (Transistors, Diodes), Capacitors
- c) Semiconductors (Transistors, Diodes), Resistors, Capacitors
Câu 142:
In a semiconductor junction diode, electrons are the minority carriers.
- a) Within the P region
- b) Within the N region
- c) In both the N and P regions
Câu 143:
Synchros compare in construction to alternating current generators are
- a) Similar
- b) Difference
- c) More complex
Câu 144:
Which components are In the “Computation“ section of the FCC?
- a) Processor and Analogue Digital Converter
- b) Processor and Memory
- c) Processor and Bus-System
Câu 145:
A computer consist of at least the C.P.U and
- a) Memory and input & output port
- b) Memory, ALU, input & output port
- c) Memory, input & output interface and bus system
Câu 146:
If the arrow points from emitter to base, the transistor is
- a) NPN transistor
- b) PNP transistor
- c) NPN or PNP transistor
Câu 147:
For logic AND gate, the output has a logic 1 if
- a) All inputs have a logic 1
- b) One or more inputs have a logic 1
- c) All inputs have a logic 0
Câu 148:
The micro diodes are:
- a) Primarily used for electrical power supply devices
- b) Mainly used in communication technology
- c) Used in rectifier circuits for large power outputs
Câu 149:
Software can be done by maintenance personnel is classified in
- a) level A
- b) level E
- c) level B
Câu 150:
Software Level E failure is defined as
- a) Catastrophic
- b) Major
- c) No Effect
Câu 151:
The general arrangement of ARINC 629 includes
- a) databus cable, current mode coupler, stub cable
- b) current mode coupler, databus cable only
- c) current mode coupler, stub cable only
Câu 152:
To keep EMI (Electromagnetic interference) within limits it can be necessary to install
- a) EMI-filter on the receiver and transmitter side of the unit
- b) EMI-filter on the receiver side of the unit only
- c) EMI-filter on the transmitter side of the unit only
Câu 153:
A NAND gate has inputs A and B and output C. If the output (c) was zero, what are the inputs?
- a) A=0, B=0
- b) A=1, B=1
- c) A=1, B=0
Câu 154:
An ARINC 429 system uses a.
- a) 20 bit word over a bi-directional bus
- b) 32 bit word over a twisted pair of wires
- c) 16 bit word over a twisted pair of wires
Câu 155:
A transistor has three terminal are
- a) Source, Gate, Drain
- b) Emitter, Base, Collector
- c) Source, Base, Drain
Câu 156:
The Middle layer of transistor is called
- a) Emitter
- b) Base
- c) Collector
Câu 157:
If a signal has quantity in volts and physical position it is
- a) digital
- b) synchronous
- c) analogue
Câu 158:
HUD are succsessively installed in many aircraft to
- a) improve takeoff abilities under bad weather conditions
- b) improve landing abilities under bad weather conditions
- c) use in cruise only
Câu 159:
Synchros work like
- a) Voltage regulators
- b) Induction regulators
- c) Resistance regulators
Câu 160:
Each pilot has two Display Units. They are
- a) Primary Flight Display (PFD) and System Display (SD)
- b) Primary Flight Display (PFD) and Navigation Display (ND)
- c) Navigation Display (ND) and System Display (SD)
Câu 161:
Which layer of transistor is called the emitter?
- a) First layer
- b) Middle layer
- c) Last layer
Câu 162:
EMI is acronym for
- a) Electrical Measurement Index
- b) Electromagnetic Indication
- c) Electromagnetic interference
Câu 163:
TR is the abbreviation for a
- a) transmitter Resolver
- b) torque receiver
- c) torque synchro
Câu 164:
A transistor is used as
- a) A fast electronic switch
- b) A regulator for small and medium DC voltages and currents
- c) A fast electronic switch or regulator for small and medium DC voltages and currents
Câu 165:
In CRT. The electron beams are pulled towards the screen (Anode) by
- a) a high voltage
- b) a low voltage
- c) all voltage
Câu 166:
Forward voltage of a silicon diode is.
Câu 167:
Adding invertors to the two inputs of an AND gate makes a
- a) OR gate
- b) NOR gate
- c) NAND gate
Câu 168:
For logical combination there are only three basic functions
- a) INVERTER function, AND function and SUB function
- b) INVERTER function, SUB function and OR function
- c) INVERTER function, AND function and OR function
Câu 169:
In Positive Logic representation
- a) state 1 is more positive than state 0
- b) state 0 is more positive than state 1
- c) both states have same positive voltages but stage 1 has more current
Câu 170:
Light travels along a fibre optic by
- a) refraction
- b) reflection
- c) dispersion
Câu 171:
ESD is acronym for
- a) Electrical System Data
- b) Electrostatic Sensitive Devices
- c) Electronic System Display
Câu 172:
ARINC 629 current mode couplers are
- a) capacitive
- b) inductive
- c) resistive
Câu 173:
Which voltage can be absolutely fatal for components?
- a) Voltages from well below 100 volts
- b) Voltages from above 1000 volts
- c) Any voltages
Câu 174:
For CRT display In case one of the colours fails
- a) All pictures still available
- b) a white picture is no longer displayable
- c) a red picture is no longer displayable
Câu 175:
How many terms are used for Electromagnetic Environment?
Câu 176:
Which logic gate can be represented as a parallel circuit?
- a) OR gate
- b) Exclusive OR gate
- c) AND gate
Câu 177:
What is a Computer?
- a) is a machine that processes data by means of digital technologies
- b) is a machine that processes data by means of analogue technologies
- c) is a machine that receive data by means of digital technologies
Câu 178:
Software Level C failure is defined as
- a) Major
- b) Minor
- c) Catastrophic
Câu 179:
In a transistor, number of sequential semiconductor layers are
Câu 180:
What is the main disadvantage of a fibre optic data bus?
- a) Less strong and durable when compared to twisted pair and coaxial cable
- b) Multiple connections are economically impractical
- c) Bend radius and moisture ingress at connections
Câu 181:
What does Hardware mean?
- a) all devices that are required to process binary data in analogue systems
- b) all devices that are required to collect binary data in analogue systems
- c) all devices and components that are required to process binary data in digital systems
Câu 182:
To drive LCDs
- a) Direct current must be used
- b) Alternate current must not be used
- c) Direct current must not be used
Câu 183:
OLED−Technology has the advantage over LCD−Technology of
- a) The colours are brighter
- b) The screen can also be read from a side view
- c) The colours are brighter, the screen can also be read from a side view and is thinner and even flexible
Câu 184:
Diodes are:
- a) Conductors,
- b) Semi-conductors
- c) Insulators
Câu 185:
For logic NAND gate (Not-AND-Gate), the output have logic 1 if
- a) All inputs have a logic 1
- b) One input has a logic 1
- c) One input has a logic 0
