2W151 URE V3 (a)

1.

1 point

What are the two basic components of a switch?

Contacts and actuators.

Contacts and throws.

Actuators and levers.

Contacts and levers.

2.

1 point

Which of the following conditions is a cause of chafing?

Tight-fitting connectors.

Loose-fitting clamps.

Insulated clamps.

Loose-fitting connectors.

3.

1 point

What type of manual switch contains a spring or some other restoring force that returns the
actuator to a certain position?

Biased.

Controlled.

Governed.

Polled.

4.

1 point

Magnetism is defined as an invisible force with the ability to accomplish

pneumatic work.

mechanical work.

forward and reverse biases.

electrical work.

5.

1 point

If a conductor is passed through a magnetic field so that it will pass through the magnetic
lines of force, it will generate

electrical current.

thermal coefficient changes.

electrical resistance.

magnetic resonance.

6.

1 point

Relays are made to operate on a

large amount of resistance.

small amount of current.

large amount of current.

small amount of voltage.

7.

1 point

An electrical device used to mechanically switch electrical circuits is a

resistor.

capacitor.

relay.

diode.

8.

1 point

What is the moveable part of the switch that is manipulated to complete or open the
electrical circuit or circuits to allow or inhibit the flow of electrons?

Throw.

Lever.

Actuator.

Contact.

9.

1 point

When an object gains or loses a large amount of electrons, scientists say it possesses a

grounding charge.

balancing charge.

static charge.

neutralizing charge.

10.

1 point

What is included on push-pull type circuit-breakers to indicate an open condition?

Red indication on the face of the circuit-breaker indication window.

Orange trip flag.

Colored indicator collar.

Red “o” on a white background in the inspection window.

11.

1 point

The actual value of carbon-composition resistors can vary from

5 to 10 percent.

5 to 20 percent.

1 to 5 percent.

1 to 15 percent.

12.

1 point

What three components are found in all circuits?

Power source, load, and resistors.

Power source, load, and conductor.

Power source, resistors, and conductor.

Power source, wires, and conductors.

13.

1 point

Which component of a battery generates the negative charge during operation?

Electrolyte.

Anode.

Diode.

Cathode.

14.

1 point

When do you use compressed air for cleaning electrical equipment?

After using dry cleaners.

Only as a last resort.

Only when oil is applied.

After using chemical cleaners.

15.

1 point

What does the term current refer to?

Quantity of electrons flowing past a given point during 1 second.

Amount of electrical pressure in the circuit.

Amount of power being transmitted through a conductor in 1 second.

Total resistance present in a circuit.

16.

1 point

Static electricity refers to

balanced electricity.

continually moving electricity.

electricity at rest.

variable electricity.

17.

1 point

What is the movable part of a solenoid called?

Slide.

Armature.

Actuator.

Plunger.

18.

1 point

A good conductive material

easily dissipates static charges.

has electrons bound tightly to the nucleus.

easily gains static charges.

has electrons bound loosely to the nucleus.

19.

1 point

What is chafing?

Movement of components.

Constant friction (rubbing) between wiring harnesses and the structure to which they are attached.

Constant friction (rubbing) between electrons and the insulation sleeve.

Electrical movement.

20.

1 point

Which type of circuit breaker can be opened as well as closed by the operator?

Switch-type thermal circuit breaker.

Toggle-type thermal circuit breaker.

Magnetic-type thermal circuit breaker.

Bimetallic strip-type thermal circuit breaker.

21.

1 point

In a generator, the electrons in the conductor will be drawn towards the side of the coil that
is closest to the

south pole of the magnetic field.

north pole of the magnetic field.

source of current.

magnetic dipole.

22.

1 point

In schematic diagrams push button switches are shown in their normal or

open.

biased positions.

regulated position.

closed.

23.

1 point

Which technical order contains inspection and repair information that applies across all
aircraft wiring systems?

1–11A–14.

1–1A–14.

14–1A–1.

11–1A–14.

24.

1 point

You must visually inspect equipment before testing and following repair actions to

ensure the job was completed on time.

check for obvious defects.

establish a maintenance record.

document actions taken.

25.

1 point

Magnetic lines of force never

bend; they cross.

attract; they join.

cross; they bend.

repel; they attract.

26.

1 point

What is the unit of measurement for resistance to current flow?

Ohm.

Watt.

Volt.

Amp.

27.

1 point

Haphazard alignment of the individual molecules causes the effects of their magnetic poles to

cancel out.

create a static charge.

generate current.

become stronger.

28.

1 point

What is the most obvious indication of chaffing?

Exterior damage to cables.

Mechanical malfunctions.

Cannot duplicate malfunctions.

Electrical malfunctions.

29.

1 point

What electrical component is designed to offer a predetermined amount of opposition to
current flow in a circuit?

Filter.

Resistor.

Capacitor.

Diode.

30.

1 point

Any time that a conductor serves as the path for electrons to flow, it

develops a magnetic field.

becomes ionized.

develops a static charge.

temperature coefficient changes.

31.

1 point

The flow of electrons in a battery is always from the

anode to the cathode.

cathode to the anode.

anode to the diode.

diode to the anode.

32.

1 point

How do you check electrical equipment before testing and following repair actions?

Visually.

Mechanically.

Operationally.

Electrically.

33.

1 point

A three-terminal variable resistor is a

tapped resistor.

rheostat.

potentiometer.

fixed resistor.

34.

1 point

What effect does arranging the conductor into a coil have on the magnetic lines of force?

It forces them to cross.

They are concentrated.

A coil has no effect on magnetic lines of force.

They are weakened.

35.

1 point

Which type of wiring diagram is appropriate for large or complicated circuits?

Schematics.

Pictorials.

Pictograms.

Layouts.

36.

1 point

Which of the following substances is an insulator?

Iron.

Gold.

Glass.

Silver.

37.

1 point

What is the only real cure for wire chafing problems?

Following proper maintenance procedures.

Eliminating slack from all wiring harnesses.

Eliminating the need for fasteners.

Eliminating the use of crimped or spliced wires.

38.

1 point

The conductivity of some insulating materials is increased by the absorption of

moisture under high-humidity conditions.

air under low-humidity conditions.

moisture under low-humidity conditions.

heat under high-humidity conditions.

39.

1 point

Reed relays filled with inert gas to

act as a restoring force.

prevent corrosion.

prevent arcing.

prevent heat buildup.

40.

1 point

What kind of relay has two de-energized states?

Ratcheting.

Reed.

Positional.

Latching.

41.

1 point

What is the unit of measure for movement of electrons through a conductor?

Watt.

Volt.

Amp.

Ohm.

42.

1 point

To prevent chafing, the slack in a wiring harness between two support points normally
should not exceed

½ inch.

⅜ inch.

¼ inch.

⅝ inch.

43.

1 point

What type of circuit breaker is opened by a coil when the current exceeds the value set at
the factory?

Thermal.

Slow-blow.

Fast-blow.

Magnetic.

44.

1 point

Which of the following choices correctly reflects basic atomic particle placement in an atom?

Protons and neutrons in the nucleus with electrons in orbit.

Protons and electrons in the nucleus with neutrons in orbit.

Neutrons and electrons in the nucleus with protons in orbit.

Protons in the nucleus with neutrons and electrons in orbit.

45.

1 point

What effect will increasing the current have on an electro magnet?

Strengthens the magnetic field.

Lowers the temperature coefficient.

Raises the temperature coefficient.

Raises the resistance offered by the conductor.

46.

1 point

What restores a solenoid to its de-energized state?

Counter weight.

Spring.

Re-loading mechanism

Pressurized gas cartridges.

47.

1 point

Which component of a battery generates the positive charge during operation?

Electrolyte.

Diode.

Anode.

Cathode.

48.

1 point

What type of circuit breaker is opened by a bimetallic strip when excess current is
experienced in a circuit?

Fast-blow.

Magnetic.

Slow-blow.

Thermal.

49.

1 point

An electrically unbalanced atom is called

a proton.

a neutron.

an ion.

an electron.

50.

1 point

When cleaning electrical equipment, use

only approved dry chemical cleaners.

any dry chemical cleaner.

only approved cleaning solvents.

fast-dry alcohol solution.