問題一覧
1
The opposite negative form of the original statement or variable is called
complement
2
The maximum number of digital inputs that a single logic can accept is called
Fan-in
3
The Boolean expression for an OR gate with the input of A, B, C, and D would be
F= A+B+C+D
4
If a signal has a quantity in volts and physical position it is
analogue
5
What are the main advantages of using fiber optic data transmitted when used in aircraft
Weight and EMI insensibility
6
To change a number from decimal to octal: divided by
8
7
Convert an electrical input signal to an optical signal is the function of
transmitter
8
What is the relationship between bandwidth and frequency in a fibre optic cable
as the frequency Increased so does bandwidth
9
The binary number 1010100011100101 in hexadecimal
1010 – 1000 – 1110 – 0101 A - 8 - E - 5 = A8E5
10
Parity bit in digital information is used
to check the validity of data information
11
A tri-state device is a modification of the NOT gate which has
three possible outputsthree possible outputs
12
The hexadecimal D
13
13
The term used to describe any aircraft cockpit that features electronic flight instrument displays is called
glass cockpit
14
A computer required to operate
data bus, address bus and control bus
15
EFIS is normally consisting of
Primary flight display (PFD). - Multifunction display (MFD). - Engine indicating system (EIS). - Crew alerting system (CAS)
16
In the inhibit gate, the inhibit will be logic (1) to
disable the gate
17
When will a NAND gate give logic 0 at the output
When both inputs are at 1
18
Two single wires use to transmit 32 bit word in
ARINC 429
19
The basic T instrument layout consists of
Attitude indicator top center - Airspeed to the left. - Altimeter to the right. - Heading indicator under the attitude indicator
20
The interaction of light with semiconductor materials is calledThe interaction of light with semiconductor materials is called
Photo electric effect
21
On an ARINC 629 data bus, the maximum amount of current mode couplers per data bus is
120
22
ARINC 629 data is
two cables bi directional
23
On an EADI flight director command bars show
the required path with respect to the actual path
24
RAM is an example of what type of memory
Volatile
25
A given Transducer provides a voltage which corresponding to true heading
The voltage can be converted to bits by using: analogue to digital converter
26
Convert binary number 011101 to octal
35
27
The fiber optic data bus links are
bi-directional
28
110001001
189base16
29
ARINC 429 bus uses
twisted shielded pairs of wires
30
Light travels along a fibre optic by
reflection
31
Which of the following ARINCs is bi-directional
629
32
The hexadecimal F
15
33
What is the fixed feature of an ADI
The aircraft symbol
34
When will the NAND and the NOR GATE become a NOT GATE
If inputs connected together
35
Data is usually stored in
ROM
36
An optical disk that is said to be a WORM configuration is what type of disk
CD-R
37
The Advantage of using liquid crystal display is
less weight and lower cooling
38
Convert the binary number (110010) into decimal number
50
39
ARINC 429 low rate of transmission is
100 Kbits/second
40
An ARINC data word is bit is 11-29, if bits 11-18 are patched which of the following would be the LSB bit
19
41
Typical displays on an EHSI are
VOR, Map, and Plan and weather radar
42
Convert the decimal number 15 into binary? 15
= 1111
43
Multiply each bit by 8 n (where n is the weight of the bit), is
octal to decimal technique
44
EFIS is acronym for
electronic flight instrument system
45
The decimal number from 0-999 is range
12bit BCD
46
What is a baud
A bit of data
47
Which logic gate can be represented as a parallel circuit
OR
48
Any message transmitted by a bus has
limited time
49
Type of fiber optic core is
dielectric material
50
In computer Temporary a registers is
used as temporary storage for instructions and data
51
The BCN number 10011000 expressed as a decimal is
98
52
Flight plan MAP information integrated with
electronic horizontal situation indicator
53
Convert the hexadecimal number 25 into decimal
37
54
What is the angle of acceptance in the fibre optic cable
the angle at which the light must Strike the fibre for data to be transmitted
55
An electronic centralized aircraft monitor (ECAM) is a system used in
airbus
56
TTL (OR) logic
the transistor is in parallel and the output is driven high if either of the transistors is conducting
57
The engine indication and crew alerting system (EICAS).is one example of
Informational computer
58
All information required to fly the aircraft is supplied on one screen called
PFD
59
Once an ARINC 629 LRU has transmitted massage it will wait how long before transmitted again
until the end of transmit interval
60
ARINC 629 is
Half Duplex
61
Which logic gate has both inputs high to get an output
AND gate
62
Coded of information that direct to activities of the CPU is called
instructions
63
The two inputs AND gate has
four possible combinations
64
Aircraft instruments are classified by the job they perform into three basic kinds
Flight instruments. Engine instruments and navigation instrument
65
What is the purpose of the data bus
It is used to carry data and instructions from one unit to another
66
Within a computer controlled flight system, position feedback is converted from
analouque to digital
67
Multiply each bit by 16 n (where n is the weight of the bit), is
hexadecimal to decimal technique
68
Temporary storage for instructions and data within the microprocessor
buffers or registers
69
Data transmit in one direction
simplex
70
BCD is a
four digits binary number
71
The octal number 1001 expressed as a decimal is
513
72
The Central Processor Unit (CPU) consists of
the ALU and control unit
73
COMPUTER MESSAGE 3B4 is
hexadecimal
74
TTL (AND) logic
the transistor is in series and both transistors must be in the conducting state to drive the output high