Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

SMA > Block 1 Day 2 > Flashcards

Block 1 Day 2 Flashcards

1
Q

In order to be efficient, a helicopter engine must turn at a ___________ _________

A

Constant speed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The speed of the helicopter engine is __________ for safe operation of of the rotor system

A

too high

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

A speed reduction device, known as ________________ must be uses between a helicopter engine and a rotor system

A

Transmission gearboxes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How do transmissions and drive shafts carry the rotational energy (engine torque) through gearboxes?

A

Engine torque is transmitted to an input gearbox

Engine torque RPM is reduced and the direction is changed so it can be input

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Drive shafts sections are connected to the _______________ and are interconnected to the ________________________________________

A

back of the main transmission

intermediate and tail boxes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Drive shafts transmit ________________ to their respective gear boxes

A

rotational energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Intermediate gearboxes change __________, and change the _________ of the drive shaft to the tail gearbox

A

speed

angle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The tail gearbox reduces ________ and changes the _________of the drive shaft to the tail which provides anti-torque and directional control

A

RPM

angle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Transmission and Drive System components:

A

Are the largest and most important component of a helicopter
Carries engine torque to the main and tail rotor
Transmits engine power at a reduced rate to the main and tail rotor systems

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

A free wheeling unit is incorporated to permit either or both engines to disengage from the transmission in the event of:

A

Single engine failure
Autorotation
Whenever engine RPM drops below main rotor RPM

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Transmission and Drive System Components include:

A 
Main Gearbox/Main transmission
Intermediate Gearbox
Tail Gearbox
Accessory Gearboxs/Drives
Driveshaft sections
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the location of the main gearbox/main transmission?

A

It is centrally located

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Where is the intermediate gearbox located?

A

At the base of the tail pylon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Where is the tail gearbox located?

A

At the top of the tail pylon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What component takes power from the engine(s) at a reduced rate and then transmits that power to the helicopter’s main and tail rotor drive systems.

A

Main gearbox/main transmission

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What drives both the main rotor mast as well as the tail rotor drive components.

A

Main/gearbox/main transmission

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What component carries transmission torque to the tail rotor gearbox?

A

Intermediate gearbox

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What component changes the angle of the drive into the tail gearbox?

A

Intermediate gearbox

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What component reduces tail shaft input speed (gear reduction)?

A

Intermediate gearbox

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What component provides the mounting point for the tail rotor head?

A

Tail gearbox

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What component changes the angle of the drive?

A

Tail gearbox

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What component provides a RPM reduction for the tail rotor?

A

Tail gearbox

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What drives the accessory gearboxes/drives?

A

The main gearbox

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What component provides for an angle of drive change and also for gear reduction?

A

Accessory gearboxes/drives

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What provides a mounting and drive for essential components such as: hydraulic pumps, generators, rotor brake discs, etc.?

A

Accessory gearboxes/drives

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

All the gearboxes covered are interconnected and driven by…

A

Sections of driveshafts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

What connects the engines to the transmission systems, driving the main and tail rotor systems?

A

Driveshaft sections

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What are the different modes of flight for a prop-rotor system?

A

VTOL mode
CONV mode
APLN mode

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

What is the VTOL mode and when is it used?

A

Vertical take off and landing. It provides lift and control like a helicopter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

What is the CONV mode and when is it used?

A

Conversion. Provides lift and thrust

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

What is the APLN mode and when is it used?

A

Airplane. Provides thrust like any turboprop or C-130

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

Prop-rotor systems are powered by the engines through the ____________

A

Prop-rotor gearboxes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

Prop-rotor systems provide __________ and _______ by a right and left counter-rotating prop-rotor system

A

lift

thrust

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

What three colors are used to color code prop-rotor blades?

A

Red, Green, White

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

Are the left and right blades in a prop-rotor system interchangeable?

A

No

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

The diameter of prop-rotor and twist of blades are a ___________ between helicopter and propeller aerodynamics.

A

compromise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

Prop-rotor blades are synchronized by ______________, which also allows for single engine operation

A

Inter-connecting Driveshaft

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

Prop-rotor blades are ___________ rotating. The left rotates ________ and the right ___________

A

counter
CCW
CW

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

What are the components of a Prop-rotor system?

A

Prop-rotor blades
Drive System
Swashplate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

What is the primary function of the drive system in a prop-rotor aircraft?

A

Transmits torque from the engines to the propellers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

What is the secondary function of the drive system in a prop-rotor aircraft?

A

Provides synchronization of the prop-rotors while enabling single engine operation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

The drive system on a prop-rotor aircraft consists of…

A 
2 prop-rotor gearboxes
2 tilt axis gearboxes
2 nacelle heat exchangers
midwing gearbox
emergency lubrication system
interconnecting shafting system
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

What transmits flight control inputs to each prop-rotor hub and blade assembly on a prop-rotor aircraft?

A

swashplate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

How are control inputs from the pilots transferred to the swashplate?

A

Via hydraulic actuators

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

The flow or movement of electrons through a conductor

A

Current

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

Current is measured in ______

A

amperes or amps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

Electrical pressure

A

Voltage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

The force that pushes electrons through an electrical circuit is measured in _______

A

Volts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

Opposition to current in an electrical circuit or device

A

resistance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

Resistance is measured in ______

A

ohms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

If voltage is increased the current increases proportionately. If resistance is increased , the current will decrease proportionately

A

Ohms law

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
52
Q

Device used for the temporary storage of electrical energy

A

Capacitor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
53
Q

The electrical energy stored in a capacitor is later discharged as ____________

A

Voltage drops

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
54
Q

Property that opposes change in current flow through a coil

A

Inductance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
55
Q

AC circuit, whenever the current passes through a series of changes and returns to the starting point

A

Cycle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
56
Q

The number of times a cycle occurs in one second

A

Frequency

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
57
Q

Frequency is depicted as _________

A

Hertz (Hz)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
58
Q

A complete elapsed cycle as measured from a reference point

A

Phase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
59
Q

Phase is expressed in ___________

A

Degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
60
Q

A complete path through which current can flow

A

Electric circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
61
Q

Circuit is broken so that the current is no longer able to pass

A

Open circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
62
Q

Electrons flow in a complete uninterrupted path

A

Closed circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
63
Q

Path of electrons is able to follow a shorter path than intended by design

A

Short circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
64
Q

Devices connected end-to-end so that current has only one path along which to flow

A

Series circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
65
Q

Devices connected so that current has more than one path in which it can flow

A

Parallel circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
66
Q

Electrical device which restricts current flow to one direction or an electrical check valve

A

Diode

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
67
Q

A large, conductive body in the electrical circuit

A

Ground

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
68
Q

A circuit of current flowing through all of the elements, from the power source to component and then back in an unbroken course

A

Continuity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
69
Q

A simple plate or bar, usually made of copper

A

Bus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
70
Q

Electrical power is _________ on the bus and then ____________ to other buses and components

A

centralized

distributed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
71
Q

Non-moving electrical charge usually caused by friction

A

Static Electricity

72
Q

With ____________ , positively charged electrons jump from one object to another

A

Static Electricity

73
Q

__________ drastically effects communications and electronic equipment on the aircraft

A

Static Electricity

74
Q

Voltage is measured in

A

Volts

75
Q

Where are in-flight static eliminators installed to dissipate static build-up?

A

The wing tips and tail assembly trailing edges

76
Q

On the ground aircraft are equipped with static eliminators called _______________

A

ground wires

77
Q

_____________reduce the possibility of a fire during refueling

A

ground wires

78
Q

What are the two types of dynamic electricity?

A 
Alternating current (AC)
Direct current (DC)
79
Q

Invisible force that has the ability to accomplish mechanical work by attraction and repulsion.

A

Magnetism

80
Q

Flow of current through a circuit

A

Dynamic electricity

81
Q

A temporary magnet that needs electrical current to produce a magnetic field

A

Electromagnet

82
Q

The strength of an electromagnet is determined by:

A

The number of windings of wire around a metal core
The type of metal core
The amount of current passing through the wire

83
Q

Electricity is most commonly _________________

A

Dynamic electricity

84
Q

The movement of free electrons through conductors

A

Electricity

85
Q

Movement of electrons is referred to as _________

A

Electric current

86
Q

Strength of electric current flowing in a circuit is measured in ___________

A

Amperes or amps

87
Q

Tool used to measure current

A

ammeter

88
Q

The four types of electrical circuits

A

Series circuit
Parallel circuit
Series parallel circuit
Open/closed circuit

89
Q

Type of electrical circuit in which current can flow in only one path

A

Series Circuit

90
Q

Type of electrical circuit in which two or more electrical devices are connected across, or are connected independently, to the same source of electrical power and current has more than one path in which to flow

A

Parallel circuit

91
Q

Type of electrical circuit which is a combination of both the series and parallel circuits

A

Series Parallel Circuit

92
Q

Open/Closed Circuit

A 
Open= Broken Wire = No current flow
Closed = Complete Circuit = current flows
93
Q

Does current flow in an open or closed circuit?

A

Closed circuit

94
Q

Is a broken wire part of an open or closed circuit?

A

Open circuit

95
Q

An invisible force that can produce light, heat, and magnetism

A

Electricity

96
Q

Electricity used by aircraft is produced in these three ways:

A

Thermoelectric Method
Chemical Method
Mechanical Method

97
Q

The method in which voltage is produced through the direct conversion of heat into electricity

A

Thermoelectric Method

98
Q

Two dissimilar metals that are bonded together

A

Thermocouple

99
Q

TIT

A

Turbine Inlet Temperature

100
Q

EGT

A

Exhaust Gas Temperature

101
Q

A _________ is a source of chemical energy used to produce DC power for the aircraft

A

battery

102
Q

A battery supplies _________ during an emergency such as the loss of all AC or DC power

A

DC power

103
Q

A battery is connected to a _____ circuit

A

DC

104
Q

When the battery control switch is placed to ON, a ___________ action takes place and DC voltage is produced

A

chemical

105
Q

The three types of batteries are:

A

Lead acid battery
Nickel Cadmium battery (NICAD)
Dry cell battery

106
Q

The type of battery that works like a car battery

A

Lead acid battery

107
Q

Lead acid batteries are being replaced by ________

A

NICADs

108
Q

The type of battery used for high current demand because of their ability to hold an electrical charge longer

A

Nickel-Cadium Battery (NICAD)

109
Q

______________ used in both NICAD and lead acid batteries store electrical energy

A

Liquid chemicals

110
Q

Energy is released as ______________ when the battery circuit is complete

A

voltage

111
Q

__________ are very durable and require less maintenance than lead acid batteries

A

NICADs

112
Q

Most common type of battery

A

Dry cell battery

113
Q

Battery used when small amounts of current are needed for short, irregular intervals

A

Dry cell battery

114
Q

What 3 things are needed to produce an electrical current mechanically?

A

Conductors
Magnetic fields
Rotating motion

115
Q

Whenever there is current flow in a conductor, _________ are produced.

A

Magnetic fields

116
Q

Magnetic fields are used to operate components such as:

A

solenoid valves, pumps and motors

117
Q

A solenoid valve can be moved to an ________ or ____________ position

A

open

closed

118
Q

Rotating armature passing through a series of stators also produces ____________

A

electric current

119
Q

Whenever a conductor, like a wire or an armature, cuts magnetic lines of force, _____________ is produced in the conductor

A

Voltage

120
Q

What is the principle of generator operation?

A

Rotating motion

121
Q

How do AC/DC generators work to create electricity?

A

Rotating motion

122
Q

What is the general term for a device used to control the electrical system and components?

A

Circuit control devices

123
Q

A pole on a switch that moves and makes or breaks a connection; it starts and stops current flow

A

Toggle

124
Q

A switch that is locked in a set position to prevent inadvertently placing the switch in the wrong position at a critical time

A

Lever Lock

125
Q

A type of switch that is a variable resistor with a knob that when rotated to the right, current flow increases and when rotated to the left current flow decreases. It also stops and starts the current flow

A

Rheostat

126
Q

A type of switch used primarily as a limit switch, which automatically controls circuits, preventing dangerous operation

A

Micro-switches

127
Q

A type of switch that takes the place of several switches

A

Rotary selectors

128
Q

What is the primary purpose of fuses?

A

To protect electrical components and wiring

129
Q

How do fuses work?

A

A current flows through a conductor producing heat. The greater the current, the hotter the conductor. If the current is greater than the fuse rating, the heat produced melts the metal strip, opening the circuit

130
Q

What are two types of fuses?

A

Glass tubular and Current limiter

131
Q

A type a fuse which uses a strip of low melting-point metal and is rated by amperage

A

Glass Tubular

132
Q

The type of fuse found in heavy-current-draw circuits such as generators

A

Current limiter

133
Q

Current limiter fuses are usually made of __________ because strips of this material can survive large amounts of current for short periods of time

A

copper

134
Q

Which type of fuse allows momentary overload to occur without opening the circuit

A

Current Limiter

135
Q

Why are circuit breakers used instead of fuses?

A

Because it is easier to close a circuit in flight by resetting the breaker than by replacing a fuse

136
Q

With a circuit breaker, when the current exceeds the breaker’s rating, the circuit breaker __________, opening the circuit and stopping the current

A

“trips”

137
Q

What are the two types of circuit breakers

A

Push to reset circuit breakers

Push-pull circuit breaker

138
Q

Type of circuit breaker that is normally recessed, pops out when overloaded and then pushed to reset (example GFI)

A

Push to reset circuit breaker

139
Q

Type of circuit breaker that is normally retracted, the button pops when overloaded; it has a white band to indicated it’s popped or open and has a knob to manually pull when necessary

A

Push-Pull Circuit Breaker

140
Q

The type of switch that is electrically operated and used for remote control of heavy-current circuits

A

Relays

141
Q

Relays are usually located __________ the source of power and the component to be operated

A

between

142
Q

_______ allow the cables carrying heavy current to have a short run to the component

A

Relays

143
Q

_________ are small electromagnet switches

A

Relays

144
Q

What do most large aircraft use for primary electric power

A

Alternating Current (AC)

145
Q

AC is a _______, _________ power source which is necessary to operate electric motors, valves, computers and flight and engine instruments reliably

A

stable, regulated

146
Q

AC power distribution units save a great deal of ______ because the wiring and system components are smaller and lighter than for DC

A

weight

147
Q

What is the voltage of an AC generator?

A

115/200 volts

148
Q

The type of generator in which voltage output is produced by the rotating field (magnet) passing the fixed stators

A

Three phase generator

149
Q

A ___________ is constructed of three stator coils around a common rotating field

A

Three Phase Generator

150
Q

Generator phases are referred to as ______ phase, _____ phase, ______ phase

A

A, B, C

151
Q

When the rotating field of the generator (armature) rotates from 0 degrees to 360 degrees it has completed ___________

A

One cycle

152
Q

The number of times a cycle repeats itself each second is called

A

Frequency

153
Q

Frequency is measured in cycles per second or_____

A

“Hertz” or HZ

154
Q

The difference in degrees between generators phases is referred to as _______

A

Phase

155
Q

___________ operates certain valves, supplies control power to relays for operating AC motor and pump assemblies

A

DC power

156
Q

_________ is used as an emergency power supply when all AC power is lost

A

DC power

157
Q

DC Power Distribution Components include:

A 
Transfer-Rectifier (T/R)
Reverse Current Relay (RCR)
Batteries
Main DC Buses
Emergency DC Buses
158
Q

Most aircraft use a _______ to step down (transform) AC voltage and rectify it to DC voltage

A

Transfer-Rectifier (T/R)

159
Q

A Transformer-Rectifier (T/R) steps down 115/200 volt, 3 phase, 400 HZ AC to _____ volts DC

A

28

160
Q

A _____________ is the primary source of DC power on most aircraft

A

Transfer-Rectifier (T/R)

161
Q

A ______________ acts as a safety device, preventing any reverse flow of current, allowing current to flow in one direction only. It opens id the current reverses.

A

Reverse Current Relay (RCR)

162
Q

A ____________ is installed between a DC power source and the DC buses being supplied power

A

Reverse Current Relay (RCR)

163
Q

DC power distribution components include both ___________ and __________ batteries

A

Lead Acid and NICAD

164
Q

The primary purpose of ___________ is to supply 28 volt DC power to relays that operate certain motors and pumps

A

Main DC buses

165
Q

Main DC buses receive 28 volt DC power from _______________

A

transformer-rectifiers (T/Rs)

166
Q

_____________ receive 28 volt DC power form transformer-rectifiers and/or the 24 volts from the battery and are located on most aircraft

A

Emergency DC buses

167
Q

During preflight checks, the boost pump is run to pressurize the fuel system so that internal leaks in the fuel manifold can be detected. This is called:

A

Running pressure checks

168
Q

When a boost pump is used to transfer fuel between any two tanks

A

Transferring fuel

169
Q

Engines normally receive fuel from their designated tanks. During _____________, the engines receive fuel from other tanks

A

Cross feeding

170
Q

Having to use fuel from another tank due to boost pump failure in the main tank would be an example of…

A

Cross-Feeding Fuel

171
Q

SMAs may be in charge of fueling their respective aircraft as it is the SMA’s job to ensure the safety of the refueling operations when __________________ are not available

A

Maintenance Personnel

172
Q

____________ may be required if your mission profile changes, fuel tanks need maintenance, or an increase in cargo causes the new gross weight to exceed takeoff limits

A

Defueling

173
Q

Refueling an aircraft on the ground with engines running.

A

Hot Refuel

174
Q

Since hot refueling is significantly more dangerous, it is performed only when operations require _______________

A

Rapid turnaround of aircraft

175
Q

Hot refueling _________ the aircraft’s capability and better _________ the mission requirement allowing it to be refueled on the ground without shutting down its engines

A

Enhances

Supports

176
Q

Hot refueling can be accomplished:

A

Aircraft to aircraft
Refueling truck to aircraft
Fuel bladders or ground tanks to aircraft

SMA (30 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions