5. Digital techniques / Electronic instrument systems - Q&A
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When removing a PC card from an ESDS assembly ensure a low current path between
- aircraft and ground.
- you and the assembly.
- you and the aircraft.
Why isn’t B the correct answer
A dot matrix/LED construction is
- 4*7 or a 9*5 rolling end display.
- 5*9 or a 4*7 rolling end display.
- 4*7 or a 5*7 rolling end display.
why?
In a flight director, how are small deviations corrected?
- Pilot input.
- Servo motor.
- Gyro torque.
Why?
Data is usually stored in
- RAM.
- ROM.
- ALU.
I have found that other platforms have differing answers for this question. Surely the type of data has to be specified here? RAM is a scratchpad, volatile memory, and ROM is non volatile and permanent, for start up programming etc. Could someone help clarify it better? Or is it poor questioning?
On an EHSI in weather radar mode, a severe storm would be shown as
- green areas with grey surrounds.
- red areas with black surrounds.
- blue areas with grey surrounds.
Please write your question here.
A NAND gate has inputs A and B and output C. If the output was zero, what are the inputs?
- A=1 B=1.
- A=0 B=0.
- A=1 B=0.
EXPLAIN PLS
What Logic Gate does this switch circuit indicate?
- SR gate
- DC gate
- OR gate
where I can find those type of switch circuits for the logic gates?
Bubble memory stores data on
- ferrite core substrate.
- semiconductor material.
- magnetic tape material.
Please write your question here.
2D in decimal is
- 43.
- 45.
- 41.
2D is hexadecimal number yes? So 2D in decimal 531?
An ALU performs the following
- Arithmetic and Logic operations only.
- Input/Output operations, Arithmetic, Logic Functions.
- Arithmetic, Logic, Branching and Find Instructions.
Input/output operations is CU function in CPU, isn't?
An octal format hexadecimal number 3F written as binary would be
- 110 111.
- 111 111.
- 101 011.
can anyone explain this question???
Electrostatic discharge occurs when
- materials of similar composition are physically separated from one another.
- materials of the same potential are placed into direct contact with each other.
- materials of different potential are brought in close proximity to each other.
I think this one is wrong
A semiconductor which emits photons and releases electrons when stimulated by photons is called
- a power diode.
- a laser diode.
- a zener diode.
Isn't the answer LED?
An aircraft may have been HIRF affected.
- A bonding load check is required.
- A static wick check is required.
- A full wiring loom check needed.
Explain
In order to maintain HIRF protection, bonding checks between airframe and electrical components carrying voltages greater than 50 volts RMS or DC or main earth return should not exceed
- 5 ohm.
- 1 ohm.
- 3 ohm.
Pls explain.
How many address lines would be needed for an 8 line MU?
- 2.
- 3.
- 4.
why?
What would be the outputs of this circuit, if A=1 B=1 C=0?
- 0, 1
- 1, 1
- 1, 0
why?
What does 1 represent in an analogue system?
- Switches open, demagnetised
- Switches closed, magnetised
- Switches open, unmagnetised
Please write your comment here.
0011011000101001 when transferred to computer language this information can be a representation of
- binary, octal or hex coded data.
- hex, octal and binary numbers.
- hex, octal and decimal numbers.
Why??
ACARS is an acronym for
- Airframe Communicating Addressing and Reporting System.
- Airborne Communicating Addressing and Reporting System.
- Aircraft Communicating Addressing and Reporting System.
Why is this the right answer? ARINC Communicating Addressing and Reporting System IS RIGHT
In a CRT, if the magnetic field is parallel to the Y plates, what will be the direction of the electron beam movement?
- Diagonal.
- Vertical.
- Reversed.
if the magnetic field is parallel to the Y axis why the movement of the beam is not horizontal? i know that the beam have to move in a direction that's perpendicular to the magnetic force lines...is it wrong?
An 8 data input multiplexer has how many Data Select lines?
- 8.
- 3.
- 2.
Can anyone explain how?
In a single mode fibreoptic cable
- several light wave modes can propagate simultaneously through the cable.
- the diameter of the cable is dependent on the wavelength of the light used.
- the distortion of the signal is determined by the total length of cable used.
how is this?
How is the word label 206 written in ARINC 429?
- Decimal 010110.
- Octal 01100001.
- Hex value 0x86.
how?
A BITE check for automatic performance and fault monitoring is carried out when?
- Power-up self test.
- On engine shutdown.
- During flight mode.
i dont understand what is the problem in above massage?