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General 1 Flashcards

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1
Q

When reading specific gravity of a fully charged lead acid battery what indicates a high state of charge?

A

Specific gravity reading between 1.275 and 1.300

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2
Q

What is considered the open circuit voltage of a fully charged 12 cell lead acid battery?

A

Approximately 26.4 V. 28 V are required for charging

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3
Q

What is the open circuit cell voltage of an NI – CAD battery?

A

1.25 V

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4
Q

What is a hazard when storing NI – CAD batteries and lead acid batteries in the same area?

A

The fumes from one type can contaminate the electrolyte in the other type

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5
Q

How does a capacitor store electricity?

A

By forming an electrostatic field, separated by an insulator

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6
Q

What does SLA mean with respect to an SLA battery?

A

Sealed lead acid

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7
Q

What electrical component converts direct current to alternating current

A

Inverter

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8
Q

How may you bring out important details of a part in aircraft drawing?

A

A detailed view draw to a larger scale

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9
Q

Describe information found in the title block of a blueprint:

A

Drawing size

Part or assembly name

Scale

Date

Draftsman

Film

Checker

Approving official

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10
Q

Describe bill of materials:

A

Everything needed to manufacture the part

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11
Q

What is the difference between an allowance and a tolerance used on aircraft blueprints?

A

Allowance - is the difference between the nominal dimension and the maximum and or minimum permissible sizes

Tolerance – the sum of the (+) and (-) allowance figures

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12
Q

Define clearance as used on aircraft blueprints

A

Dimension allowable between parts

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13
Q

What is an orthographic projection?

A

Different views of drawings

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14
Q

What might one view drawings represent an aircraft blueprints?

A

Thickness, gaskets, shims and plates

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15
Q

One, two and three view drawings are commonly used for:

A

Showing a shape of the object

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16
Q

What type of diagram would a mechanic use for troubleshooting?

A

Schematic diagrams

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17
Q

How can you determine if a drawing has been changed?

A

A record of the changes is listed in the revision block

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18
Q

Why are symbols used when drawing aircraft blueprints?

A

They are a form of shorthand and portray the characteristics of a component with a minimum amount of drawing

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19
Q

How is the arm for an item of equipment obtained when computing aircraft weight and balance?

A

Measuring the distance between the item and the datum

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20
Q

How is the moment for item of equipment obtained on computing aircraft, weight and balance?

A

Weight x arm = movement

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21
Q

What is a tare weight and how is it handled when making weight and balance calculations?

A

All items that can be removed then is subtracted

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22
Q

What is an aircraft loading graph?

A

A graph used for determining load distribution to keep the weight and operating C.G. within approved range

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23
Q

Why is accurate up-to-date empty weight center of gravity data so important?

A

Everything revolves around the empty weight

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24
Q

How is a positive moment obtained aft the datum?

Study These Flashcards
A

By adding weight

25
How is a negative moment obtained aft the datum?
By removing weight
26
How is a positive moment obtained forward the datum?
By removing weight
27
How is a negative moment obtained forward the datum?
By adding weight
28
How can you determine the effect of a new item of equipment on the aircraft’s weight and balance without weighing the aircraft?
Basic computations , if the weight and balance records are up-to-date
29
What is ballast and why is it used in aircraft?
Any weight added or removed to obtain a desired C.G.
30
The CG limit of an aircraft is exceeded by installation of several equipment items in the engine compartment. How can this be corrected without removing or changing any of the newly installed equipment?
Use ballast to obtain the desired CG balance
31
What is the difference between fixed wing and helicopter CG range?
Helicopters have a more restricted CG range
32
If an aircraft is loaded, so that the aft CG limit is exceeded what undesirable flight characteristic is likely to result?
The aircraft will be tail heavy, and maybe unable to recover from a stall or spin
33
As you prepare an aircraft for weighing, you determine there is equipment aboard that is not permanently installed and recorded on the equipment list. What should you do with this equipment?
It should be removed from the aircraft
34
Where are leveling instructions found, and describe one method of leveling an aircraft
The instructions are found in the TCDS and a spirit level and plumb Bob can be used to level the aircraft.
35
Describe the two most common ways of showing the CG location and or CG range
In inches from the DATUM or in percent of mean aerodynamic chord (MAC)
36
What does the term mean aerodynamic chord (MAC) refer to?
The distance between the leading and trailing edge of the wing
37
What two types of fluid lines are commonly used in aircraft plumbing?
Metal tubing, and flexible hose
38
How is metal tubing classified in size?
By the outside diameter in 1/16 inch increments and by wall thickness
39
How are flexible hose sizes designated?
By the internal diameter measured in 1/16 inch increments
40
What caution must be observed when deburring the end of tubing after cutting?
Wall thickness is not fractured or reduced in size
41
Name two kinds of flares commonly used in aircraft plumbing systems
Single flare and double flare
42
Why would you not perform a specific gravity check of electrolyte in an NI – CAD battery?
The specific gravity does not change with the state of change
43
How many cells make up a lead acid battery rated at 24 V?
12 cells
44
Can NI – CAD batteries be interchangeable with lead acid types?
Yes
45
How does a capacitor store, electricity?
In the form of an electric charge or field that exists between two conductors separated by an insulator
46
What should be done when interchanging an NI-CAD battery with a lead acid battery?
The battery compartment must be cleaned, dried and neutralized with boric acid or ammonia, and then completely dried
47
What is a probable cause when troubleshooting an NI – CAD battery for failing to deliver it’s rated capacity?
Faulty cells or cell imbalance
48
What electrical component converts alternating current (AC) to direct current (DC)?
Rectifier
49
What type of diagram would a mechanic use for troubleshooting?
Schematic diagrams
50
How can you determine if a drawing has been changed?
A record in the revision block
51
Describe a centerline:
Long and short dashes
52
Describe a phantom line:
One long and two shorts
53
Describe a hidden line:
Short dashes evenly spaced
54
Why are symbols used when drawing aircraft blueprints?
They are a form of shorthand and portray the characteristics of a component with a minimum amount of drawing
55
How is the arm for an item equipment obtained when computing aircraft weight and balance?
Measuring the item to the item datum
56
How is the moment for item of equipment obtained when computing aircraft weight and balance?
Weight x arm = movement
57
What is a tare weight and how is it handled when making weight and balance calculations?
All items that can be removed then are subtracted
58
What is an aircraft loading graph?
A graph used for determining low distribution to keep the weight and operating C.G. within approved range

Oral And Practical (8 decks)

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