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BLM Block 2 > 1st half Exercise questions > Flashcards

1st half Exercise questions Flashcards

1
Q

When a circuit is broken so that current is no longer able to pass, it is called a/an ___ circuit.

A

Open

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2
Q

When the electrons flow in a complete uninterrupted path, it is called a/an ___ circuit

A

Closed

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3
Q

What is the function of a bus in an electrical system?

A

A centralized source of power for distribution

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4
Q

What are the types of electricity?

A

AC and DC

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5
Q

___ power is a stable, regulated power source, which is necessary to operate electric motors, valves, computers, and flight and engine instruments reliably.

A

AC

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6
Q

___ Transforms AC voltage and rectifies it to DC voltage

A

Transformer/Rectifer (T/R)

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7
Q

How many battery types are there?

A

2: Lead-Acid batteries & Nickel-Cadmium (NiCad)

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8
Q

What type of circuit breakers are used on our aircraft?

A

Push-Pull type

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9
Q

What sources provide AC current?

A

Electrical Generators Such as Ram Air Turbines (RAT)
Air Driven Generators (ADG)
External Power Carts

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10
Q

A complete path through which electricity can flow

A

Electrical Circuit

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11
Q

An unbroken circuit where electrons flow in a complete uninterrupted path

A

Closed Circuit

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12
Q

A circuit whose path has been broken, making electrons unable to complete the path

A

Open Circuit

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13
Q

When the electrons follow a shorter path than intended by design

A

Short Circuit

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14
Q

a flow of electrons moving through all of the elements of a circuit

A

Continuity

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15
Q

When the electrical system is turned on, the bus is charged and becomes a centralized source of power distribution.

A

Bus

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16
Q

___ is a form of electrical current that periodically reverses direction, created by electrical generators

A

Alternating Current (AC)

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17
Q

a form of electrical current that flows only in one direction.

A

Direct Current (DC)

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18
Q

Most large aircraft uses __ for primary electrical power

A

AC

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19
Q

is supplied by electrical generators, the largest of which run off of the aircraft engines and APU.

A

AC power

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20
Q

When on the ground, ___ can supply AC power to the Aircraft

A

External ground power carts

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21
Q

DC power is supplied from two sources:

A

Transformer-Rectifiers (T/R) and the aircraft batteries

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22
Q

the primary source of DC power on most large aircraft

A

Transformer/Rectifiers (T/R)

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23
Q

___ are used as an emergency backup or to operate some DC operable equipment.

A

Aircraft Batteries

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24
Q

Use a reaction between a conductive metal and liquid to produce current.

A

Lead Acid batteries

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25
Q

These batteries offer higher currents and lighter weight when compared to similarly-sized lead-acid batteries.

A

Nickel-Cadmium (NiCad) batteries

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26
Q

It receives power from the T/R and then distributes the 28-volt DC power out to systems or components

A

Main DC bus

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27
Q

The emergency DC bus distributes 28-volts to the most essential systems only.

A

Emergency DC bus

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28
Q

The type of circuit breakers used on large aircraft are the ____ type

A

Push-Pull

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29
Q

if the circuit overloads _____ stopping the current

A

The button pops out

30
Q

The ___ register system pressure

A

Pressure gauges

31
Q

An ___ stores fluid under pressure to absorb pressure surges

A

Accumulator

32
Q

___ provide Linear movement (push/pull)

A

Actuators

33
Q

___ control the direction of fluid flow into an actuator or motor

A

Selector valves

34
Q

the ___ is also the servicing point to refill low system

A

Reservoir

35
Q

The ___ is a large container that holds all the hydraulic fluid not contained in the lines.

A

Reservoir

36
Q

There are two types of hydraulic fluid in common use:

A

Mineral-based

Synthetic-based

37
Q

___ Operated manually.

A

Hand pump

38
Q

___ are driven by several mechanical power sources such as Aircraft engines or APU, Air turbine motors, electric motors, ram air turbines

A

Power Pump

39
Q

A hydraulic system must have

A

a source of power
means to transmit the power
a device to use the power

40
Q

the most common pieces of hydraulic equipment you will operate are

A

the cargo door and ramp,

and the cargo winch

41
Q

NATO fuel begins with

A

F

42
Q

Commercial Jet fuel begins with

A

JET

43
Q

Military jet fuel begins with

A

JP

44
Q

The most recommended fuel for air force turbine aircraft is

A

JP-8

45
Q

___ the temperature at which fuel will ignite

A

High flashpoint

46
Q

___ is the pressure of the air above the fuel required to keep the vapors in the fuel.

A

Low Vapor Pressure

47
Q

___ is desirable because when airplanes fly at high altitudes and in cold weather

A

Low freeze point

48
Q

___ pumps fuel out of it into the manifold so that it can be transferred to another tank

A

Transfer Pump

49
Q

a___ gauge displays the sum of all fuel tanks on the aircraft

A

Totalizer

50
Q

the ___ provides an uninterrupted supply of fuel

A

Boost Pump

51
Q

___ allows fuel to be dumped in flight.

A

Jettison or dump valve

52
Q

automatically connected to “T-Handles” that will work even in a total loss of electrical power

A

Firewall shutoff valve

53
Q

___ allows fuel to enter the manifold from an outside source

A

Refuel Valve

54
Q

When open, they permit fuel to flow between tanks.

A

Crossfeed Valves

55
Q

limit fuel flow to one direction

A

Check Valves

56
Q

is the distribution network for fuel throughout the aircraft.

A

The fuel manifold

57
Q

Self-contained fuel system, consisting of a sealed metal shell that incorporates the tank

A

External tanks

58
Q

is a nylon rubber bag that fits within a cavity in the wing or fuelage

A

Bladder Tanks

59
Q

The ___ is combined, or integrated, with the aircraft structure

A

Integral

60
Q

Three types of fuel tanks

A

Bladder
Integral
External

61
Q

___ provides electrical power, bleed air, and in some designs, hydraulic power.

A

APU

62
Q

Small self-contained jet engines that are used to power various systems while on the ground

A

APU

63
Q

The gas turbine spins a reduction gearbox at the front of the engine. the propeller is attached to the output of the reduction gearbox

A

Turboprop

64
Q

___ uses the gas turbine to spin a large fan at the front of the engines.

A

Turbofan

65
Q

The purpose of ___ section is to direct the flow of hot gasses leaving the turbine

A

Exhaust

66
Q

The ___ is where the fuel is mixed with compressor discharged air and then ignited

A

Combustion chamber

67
Q

A diffuser allows the airflow to the

A

Air conditioning
Pressurization
de-icing

68
Q

___ is designed to channel incoming air into the compressor

A

Air inlet

69
Q

a major section of a jet engine

A 
Air inlet
compressor 
diffuser
combustion chamber
turbine
exhaust 
and accessory sections
70
Q

Temp of the atmosphere means

A

Low temp = more power

71
Q

Pressure of atmosphere

A

Low pressure = less power

72
Q

Bleed air is not-combusted air that is pulled from an engine to run pneumatic systems

A

Bleed air extracted from the engines

BLM Block 2 (4 decks)

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