Airframe Electrical test

What is the role of the tachometer generator in the speed control circuit of an AC alternator?

To monitor alternator output frequency

What is the purpose of an inverter in an aircraft’s electrical system?

To convert DC power to AC power

Which type of regulator is commonly found on older aircraft with low-output generators?

Carbon pile regulator

A circuit with 3 parallel resistors rated at 100-ohms, 200-ohms and 300-ohms would have a total current value of

Not enough information to solve

What is the maximum number of wire terminals that can be joined to a single terminal-strip lug?

4

What must be closed in order to start the aircraft engine with the battery

The battery master switch

What is the maximum voltage per cell for lead-acid batteries during charging

2.35 volts

What is the recommended method for stripping wire bundles 1 inch in diameter or larger?

Double cord-lacing method

What is the definition of a wire in aircraft electrical installations?

A single solid conductor covered with an insulating material

What is the recommended knot for starting the single cord-lacing method?

Clove hitch secured by a double-looped overhand knot

Why is proper bonding and grounding important in aircraft electrical systems?

 

To ensure reliable operation and prevent hazards

What is the recommended method for providing rear compatibility with the rear grommet in connectors?

All of the above (Applying potting to the wire entry area, Installing a correctly sized plastic plug, Using heat-shrinkable tubing)

What is the recommended number of spare contacts for connectors with 26 to 100 contacts?

4

Which type of coaxial cable should not be used in aircraft electrical systems?

Solid center

What is the role of an inverter in an aircraft’s electrical system?

To convert DC power to AC

What is the minimum acceptable bend radius for rigid conduit?

2 inches

What are the characteristics of preinsulated crimp-type ring-tongue terminals?

They are used to provide a variety of circuit arrangements

What is the purpose of using precision switches in hazardous circuits?

To ensure safe operation in hazardous conditions

Which type of terminal is used for most aircraft applications?

Ring Type

What is an important factor in selecting aircraft fuses

Fuse capacity matches the needs of the circuit.

What resistance would have to be connected in series with a 3 volt lamp in a 28 volt circuit when the operating current of the lamp is 0.5 amps?

50 ohms

What charges the aircraft battery in flight?

The generator

Which type of circuit protection device can be reset after a fault has cleared?

Circuit Breaker

What is the appropriate method for installing pre-insulated terminal lugs and splices to electric wires?

using a crimping tool to secure the terminal lug

What is the purpose of push buttons in glass flight deck aircraft?

To control the aircraft’s electrical systems

What is the advantage of a current limiter?

It will take overload for a short period.

What is the purpose of an inverter in an aircraft’s electrical system?

To convert DC power to AC power

What type of control circuits are used in modern aircraft to ensure proper paralleling of the alternators/generators?

Solid-state control circuits

What is the purpose of a fuse in an aircraft electrical system?

To protect the circuit from damage caused by excessive current

What is the recommended knot for starting the single cord-lacing method?

Clove hitch secured by a double-looped overhand knot

A circuit protection device called a current limiter is essentially a slow-blow fuse and is designed to be used in

heavy power circuits.

True or False: Unlike a circuit breaker that can be reset after an electrical surge, a fuse is destroyed and will need to be replaced.

True

What is the maximum number of wire terminals that can be joined to a single terminal-strip lug?

4

What is the recommended use of transparent adhesive tape when cutting flexible tubing with a hacksaw?

 

To minimize fraying of the braid

What is the recommended method for stripping copper wire smaller than No. 10?

Hand-held wire strippers

During ground operation, aircraft generator cooling is usually accomplished by

an integral fan

What is the name for the accessories that can be installed on the back of connectors to protect the wires and even guide the wires in certain directions?

Backshell

True or False: Crimping the contacts correctly does not require changing the tools settings for each pair of wire and contact.

False

What is the main advantage of using LED lights over traditional incandescent lights?

All of the above(Higher reliability, Better visibility, Lower power consumption)

What is the relationship between switch design and the control of multiple circuits?

Switch design can make it easier to control multiple circuits

How does twisted pair wiring help reduce EMI in aircraft electrical systems?

By canceling out electromagnetic fields

What is the best practices for attaching a terminal end to a wire for an aircraft.

GMT232 crimping tool

What is the role of a contactor in an alternator system on an aircraft?

To connect the alternator to the distribution bus

What factors should be considered when determining the number of terminals on a post?

The necessity for adequate wiring space and possible future additions

What can be used to protect wire bundles running thru aircraft structures.

Conduit

What is the maximum number of wire terminals that can be joined to a single terminal-strip lug

4

Why is AC preferred over DC in aircraft electrical systems?

All of the above (AC can be transmitted over long distances more easily than DC, AC is more economical than DC, AC devices are smaller and simpler than DC devices)

Which type of switch is preferred to minimize contact arcing?

Snap action design

What charges the aircraft battery in flight?

The generator

What is the advantage of using a starter-generator in high-output generators

It saves space and weight

When determining the number of terminals to attach to a post, what factors should be considered?

Stud size and supporting means

What is the purpose of push buttons in glass flight deck aircraft?

To control the aircraft’s electrical systems

What is the minimum acceptable bend radius for rigid conduit

2 inches

Which component is used to connect all necessary buses in a parallel power distribution system?

Bus transfer breaker (BTB)

What is the purpose of wire end grommet seals in electrical wiring?

To exclude moisture entry through the use of peripheral and interfacial seals

What is the purpose of using nonconducting finishes on bonding connections?

To avoid damage to the bonding jumper

What is the recommended annual inspection for aircraft electrical wire?

All of the above (Check for abrasions and defective insulation, Check for corrosion on grounding connections, Check for proper strain relief on connectors)

What is the appropriate method for installing pre-insulated terminal lugs and splices to electric wires?

Using a crimping tool to secure the terminal lug.

What resistance would have to be connected in series with a 3 volt lamp in a 28 volt circuit when the operating current of the lamp is 0.5 amps?

50 ohms

What is the recommended number of spare contacts for connectors with 26 to 100 contacts?

4