Data Bus Midterm

The base 10 numbering system is more commonly referred to as

Hexadecimal

Decimal

Octal

Binary

The position in a number which has the least value is

Most significant position

Least significant position

Position of least value

Low value position

Which of the following would be considered an "Intermittent Load"?

Navigation Lights

Electric Fuel Pumps

Navigation Receivers

Electric Flap Motor

What type of switch is this?

Double pole double throw

Single pole single throw

Electronic switch

Double pole single throw

When splicing wire on an aircraft:

Only one splice per wire bundle is allowed

Splices should be removed, and the wires soldered together at the earliest opportunity

No more than 3 splices should be used on any segment of wire

Splices should be placed on the outside of the wire bundle

In the wire marking 1NMS21A22N the number 22 means?

22 strain wire

Pin # 22

Wire segment 22

Wire gauge 22

Aircraft components and surfaces are electrically "bonded" with Jumper wires:

To allow the entire airframe to be used as an electrical ground

To allow the electrostatic charge of the aircraft to dissipate before it contacts the ground after flight

To prevent electrical charges from moving through the aircraft structure

To maintain the electrostatic charge of the aircraft equal to that of the surrounding atmosphere

To prevent electromagnetic inductions one should use......

Co-axial cable

Shielded cable

Double shielded cable

Ground wire only

When routing a wire bundle through a bulkhead, a grommet should be used if the clearance is less than:

1 inch

3/8 inch

1/2 inch

2 inch

Threaded connectors should be .....

Tighten using a pillar

Potted as per manual

Lock wired as per manual

Torque as per manual

For an OR logic gate to have a LOW output.

One input must be HI

Both inputs must be LO

Requires an inverter on the output

Both inputs must HI

Refer to attached diagram. Which of the following logic states is correct?

A-0, B=1, Y-1

A=1, B=1, Y=1

A= 1, B-0, Y =1

A-0, 01=0, Y=1

A table that shows all possible input and output combinations of a gate is called a

Logic diagram

Logic table

Logic gate

Truth table

An AND gate can be represented by what simple electrical circuit?

Two switches in parallel

Switches in series

One switch in series

Two diodes in parallel

Refer to attached diagram. Which logic gate is represented by this symbol?

XOR

XNOR

NAND

What components are used to construct logic gates?

All of the above

Resistors

Transistors

Diodes

Which statement is correct for a NOR gate to have a Hi output?

Any input is HI

All inputs are LO

All inputs are HI

Any input is LO

Refer to attached diagram. Which of the following logic states is correct?

A=1, B=1, Y=1

A-0, B=0, V=0

A=1, B-0, V=0

A=0, B=1, V=1

Grommets should be used ..........

Can only be used with over size hole clearance.

If clearance is less than 3/8”

If clearance is less than 3/4”

With clamps of the correct size

The most common alloy found in the solder is?

Tin and Lead

Zinc, Lead, Tin and Iron.

Zinc and Tin

Tin and Iron

Splicing of wire is permitted

One splice per wire segment

Anywhere the splice does not over lap per wire segment

Every 12 inches

One splice every 2 feet wire segment

When electrical cables must be run in close proximity to fuel lines:

The cables should be clamped securely to the fuel lines to prevent vibration damage

The cables should be clamped securely beneath the fuel lines

The cables should be clamped securely above the fuel lines

Under no circumstances should electrical cables be routed in the vicinity of fuel lines

Why are some aircraft wires shielded?

To prevent the wire from chaffing

To increase the cross sectional diameter of the wire

To prevent damage to the wires from spilled fluids

To prevent unwanted signals from being induced in the circuit

Use the Wire Chart to determine the gauge of wire required for the following application: 35-foot length of wire, 28 VDC, carrying 4 amperes.

12 gauge

14 gauge

18 gauge

20 gauge

If an aircraft wire was identified as “3H218C-22N” what does the “N” indicate?

There are 22 wires in the bundle

The wire is a ground

The wire is capable of carrying a load of 22 amps

The wire is part of the autoflight system, ATA 22

Standard aircraft wire is:

Stranded copper

Single conductor copper

Single conductor aluminum

Stranded aluminum

How are decimal digits represented in the BCD system?

4 bit binary code

3 bit binary code

3 bit octal code

2 bit binary code

The position in a number which has the greatest value is

Most significant postion

High value position

Least significant position

Position of greatest value

The base 2 numbering system is more commonly reffered to as

Decimal

Binary

Hexadecimal

Octal

Data Bus Midterm

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