7.2 And 7.3 Flashcards
What has to be put on tools
Corrosion resistant finishes and sealed mechanisms
How can basic tools be cleaned
A stiff brush or rag
How do you clean a work bench metal and wooden
Metal - cleaned with an oily rag
Wooden - with a stiff brush
How should you maintain a vice
Wipe over frequently with an oily rag, lubricate the moving jaw screw bearings and threads
How should you maintain a drilling machine
Cleaned inspected and regularly lubricated
How should grinders be maintained
Keep clean from dust as much as possible, bearings should be lubricated regularly, but oil and grease can’t come into contact with the grinding shell
How should motor drives be maintained
Must be kept clean and free of dust both externally and internally, must have regular maintenance from authorised personnel
How should measuring instruments be maintained
Stored in their own protective case
How should drill bits and reamers be maintained
Drill bits - kept in a drill bit stand when not in use
Reamers - kept in boxes or laid in grooved trays for various sizes of reamers
What must part 145 have a method for
Tool control
What should you do if a tool is missing
Report it to a supervisor
Why is tool control so important
Because it can lead to loss of life or loss of aircraft depending on the damage
Why is it more common for personal tools to not be allowed in a part 145
Because it ensure better tool control through the company stores
What should be used in the trays of tool kits
Shadow foam
What is a shadow board
Storage of pliers, screwdrivers, ratchets, spanner’s, hammers as well as other tools are kept and can easily be seen if a tool is missing
What should you use if taking a tool for, a shadow board or stores
A tool tag
If using personnel tools what do you need
A tool list
When checking out a specialised tool what is needed and what is recorded
A tool tag and the person checking it out name
What do you do if at the end of your shift you want to transfer a tool to another engineer
Transfer there tool tag for yours
What is the most important check with tools
End of shift check
What happens if there is an outstanding entry in stores
An investigation is carried out to look for the tool because it can become FOD
Can tools that require recalibration be sent off before the expiry date
Yes
What must be available for all materials used in the workshop
Material safety data sheets (MSDS)
Where must many aircraft seal earns be stored
In a refrigerator
What is a dimension
A measurable limit
What is tolerance
Total amount by which a given dimension is allowed to vary
What are most tolerances
Bilateral
When can a tolerance be used
Examining the dimension of a single part or when comparing the dimensional relationship between two parts
What is a clearance fit
A fit that allows sliding or rotating between two parts
What is an interference fit
When the dimension of two parts overlap
What is an allowance
Minimum clearance space intended between two parts
How is the allowance worked out
Difference between maximum material dimensional limits of mating parts creates the allowance
What is workmanship
Skill, quality, result
What do standard of workmanship depend on
The person doing the work and the tools they have
How do you know if the tool is calibrated
A labelling system that says when it was last calibrated and when it next needs to be calibrated
What should all maintenance organisations keep when it comes to calibrated tools
A register that specifies the tools that need periodic calibration
The interval of the inspections and calibrations should be in accordance with who
The manufacturer
Sensitive instruments like electrical instruments should be calibrated when and by who
Before use by the user and also a periodic calibration
If an item is showing signs of damage or when the measurement is in doubt what should you do
Label unserviceable and must not return to service until determined serviceable
What must you check before using any calibrated tool
That it’s within its calibration date and that it is properly calibrated
Why is calibration essential on a torque wrench
Accuracy and longevity
What is the best way to check a torque wrench
Use a torque analyser
What is the analyser
A calibrated instrument to which the torque wrench is attached and required force is applied
Who carries out calibration of torque wrenches
Approved personnel
How are pressure gauges and transmitters calibrated
By hydraulic pumps which use wither water or oil
Is it possible for micrometers to slip out of calibration
Yes
What do all screwdrivers come in
Various sizes
How can you determine the size of a flat head
By the blade gauge (thickness) and blade width
How much of the screw must the screwdriver tip fill
75%
Where is the use of a slotted screwdriver used on aircraft
Quick release fasteners for various access doors, panels trim and so on
What’s the difference between Phillips and reed and prince
Philips has a slightly larger centre in the cross and the Philips screwdriver is blunt
What is the point angle on a Philips screwdriver
30°
Why is it important to pick the correct size screw head
So you don’t round off the screw and bounce out
What is the reed and prince screw tip like
Pointy
What is the reed and prince point angle
45°
What screws are reed and prince screw drivers used with
Fears on screws
What is the pozidriv
An improved version of Philips
Because of its design what does it have more of than Philips
Contact area
Why should you take care when using a posidriv screwdriver
Can be easily mistaken with a Philips
Where are posidriv screws and screwdrivers
Same place as Philips where more torque is required
What are torx screwdrivers also known as
Star drives
What do torx provide the ability to do
Apply more torque to the screw with reduced cam out risk and less operator effort
How are torx screwdrivers sized and indicated
By the letter T and range from T1 to T100
What are internal hex screwdrivers also known as
Allen key screws
Give an example of where these could be used on aircraft
In panel stud nuts in the avionics bay
What is the main positive of the Tri wing screw and screwdriver
Have the advantage of greater torque transfer to the screw
Screwdriver bits are sized from 0-15, how do you know what size to use
Screw will have a number in a circle stamped on the head
Why are Torx-set screwdriver similar to Philips
The cross is offset
What does the cruciform shape and straight wing walls allow
Greater torque transfer
Where can these be used
On aircraft wing fuel panels
MorTorq has four wings that are curved and fit into matching screwhead what does this allow
Full contact and therefore the ability to apply more torque to the screw
Where are Hi-torque screws used
Used to repeatedly install and remove fasteners
What are Ball Pein Hammer manufactured from
High grade drop forged steel which is fully heat treated
What are DIN hammer used for
Same as ball pein hammer
What is a soft face mallet used for
Is used as a driving force without damaging surfaces, they also reduce force transmitted back to the arm or hand by the user
What are soft faced mallets made of
Materials such as plastics, including nylon and natural rubber
What is a feature sometimes found on a soft faced mallet
Individual faces can be replaceable
What do you have to do before using a hammer
Check handle is secured properly, make sure face is clean from burrs,
What are single fixed joint pliers
Halves that are placed inside each other and have a pivot point installed
What are toggle compound joint pliers
Combines single (fixed) joint with a toggle joint
What are lap joint pliers
Where both halves of the pliers are made and jointed on top of each other
What are slip joint pliers
Pivot point can be moved to allow the jaws of the pliers to be increased or decreased to accommodate the job
What are diagonal pliers also known as as
Wore cutters or snips
What do Combination (Lineman’s) Pliers do
Can be used to hold, cut, twist or bend
What are long nose pliers for
Used for work with wire, allowing the user greater control when bending, gripping and cutting
What positive do multi grip pliers have
Long handles for a large force to be applied
What are vice grip pliers used for
To hold pipes, cut wire, or to hold a bolt
What are circlip pliers used for
Fitting and removing circlips
What are wire locking pliers used for
Wire locking
What is a vice
A clamping device to hold work in place
What are the three types of vices
Metal working vices, hand held vices, machine vices
Metal working vices can be either:
Fixed or rotating
Where is a machine device used
On drills
Open end spanner’s can have an angle of _ to _
0° to 90°
What is the most common angle for a spanner
15°
What sizes are spanner’s measured in
1/16”
What does a crows foot spanner’s have at the opposite end of the head
A square drive fitted to receive a ratchet to apply turning force
Where should adjustable spanner’s be used on aircraft
Nowhere they are forbidden on aircraft
When are ring spanner’s used
Close quarters, are called ring spanner’s because they go around the bolt
Why are ratchet ring spanner’s used
Allows a ring head to turn a fastener one direction but not the other
What is a combination spanner
A spanner with a standard head and a ring head
What do ratchet handles do
Used with sockets, used for removal and installation of fasteners and nuts
What do breaker bars do
Allow a socket on them meaning you can get much more power form the longer bar
What are sockets
The tool that makes direct contact with the nut
What is the socket bar for
Provide a long reach
What is a torque wrench
A wrench that applies specific torque
Why isn’t a wrench with torsion or flexing bar used as much anymore
Rarely seen because it is susceptible to damage
What are the disadvantages of a wrench with a rigid body and indicator
Hard to read in small places
What is the most common type of torque wrench
Adjustable Wrench with indicator
What is torque
Rotational or twisting force
Where should you store torque wrench
Keep in original packaging, store in a clean area, inspect the torque wrench for damage, check for calibration
What are the standard sizes for rules
Six inches, 12 inches
What is good about the flexible steel tape
Has a hook that can attach to a ledge so it can be used by one person
What can engineer squares be used for
Mark a line, check angles,
What is the scribed used for
Mark lines on any surface
What are dividers used for
Scribing arcs and circles, measuring between points, transferring dimensions
What are callipers used for
Measuring diameters and distances
What are radius gauges used for
Measure inside or outside radii
What are feeler gauges used for
Every leaf of a feeler gauge is different and is used as a go no go gauge to see what will go in and what won’t
What are punches used for
Used to make a guidance hole for drilling
What is a taper punch used for
Used to start when driving a bolt or pin out
What are pin punches used for
To punch out rivets
There are three different coloured handles for snips and what direction they cut which goes with which
Yellow cuts straight, green curve right, red curve left
What must snips ever be used for
Cutting sheet metal
On a full hacksaw blade what are they made out if
Tungsten steel
What does the tooth pitch represent
The number of teeth per inch
Full hacksaw blade have pitches of 14,18,24 and 32 what is each one
14 - coarse, 18 - coarse, 24 - medium, 32 - fine
What are the characteristics of a minis hacksaw
Used in confined spaces but can flex causing cutting to be difficult
What are files made out of
High grade carbon steel
What on the file does the cutting
The teeth
What are the coarse files teeth like
Small number of larger teeth
Where should files be stored
A clean dry environment
What do you de burr with
A de-burring tool
What is the most commonly used drill
A pneumatic
Where are electric drills used
Workshops
What is the risk with drill bits
FOD if lost
What is a drill bit
A rotary cutting tool
What is the shank of the drill for
Fit into the drilling device
What is the body of a drill
The bit between the point and the shank
What are flutes on a drill bit
Grooves that are cut or formed in the body of the drill to remove swarf
What is the margin
Narrow furnace along the flutes that determines the size of the drill
What is land
The elevated portion of the drill bit
What is land clearance
Known as the body diameter clearance as it is the area relieved of material behind the margin
What is point
The point of the drill consists of the cutting edge
What is cutting edge
The whole cutting end of the drill
What is the flank
Behind the cutting edge and extend from the outside circumference to the middle
What does the chisel edge
Doesn’t cut but penetrates the work piece
What are point angles
The angle of the cutting edges
What are some common materials for drill bits
High carbon steel, high speed steel, cobalt drill bits, carbide drill bits
