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Module 7 > Tool 2 > Flashcards

Tool 2 Flashcards

1
Q

This type of tool is used to remove a burr from an edge of a sheet or to deburr a hole

A

BURRING TOOL

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2
Q

The ________ is used to cut out metal parts, with some machines capable of shearing, squaring, and trimming metal. The _______ consists of a top and bottom die and most often cuts at a 90° angle, although some machines can cut metal into angles up to 180°. ________ are available in manual and pneumatic models able to cut various thicknesses of mild steel and aluminum. This is an excellent tool for quickly removing corners from sheet metal parts

A

notcher

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3
Q

__________ have a powered abrasive-covered disk or belt and are used for smoothing or polishing surfaces.
The ______ unit uses abrasive paper of different grits to trim metal parts. It is much quicker to use a ________ than to file a part to the correct dimension. The combination disk and belt _____ has a vertical belt sander coupled with a _________ and is often used in a metal shop.

A

Disk sanders

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4
Q

The ________ uses an endless abrasive belt driven by an electric motor to sand down metal parts much like the disk sander unit. The abrasive paper used on the belt comes in different degrees of grit or coarseness. The ________ is available as a vertical or horizontal unit. The tension and tracking of the abrasive belt can be adjusted so the belt remains centered on its rollers.

A

belt sander

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5
Q

___________ operate by electricity or compressed air. Pneumatic drill motors are recommended for use on repairs around flammable materials where potential sparks from an electric drill motor might become a fire hazard. Because of this, most power drills used in aviation maintenance work are pneumatic
When using the __________, hold it firmly with both hands. Before drilling, be sure to place a backup block of wood under the hole to be drilled to add support to the metal structure. The drill bit should be inserted in the chuck and tested for trueness or vibration. This may be visibly checked by running the motor freely

A

Portable power drills

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6
Q

__________ are the most common type of drill motor for aircraft repair work. They are light weight and have sufficient power and good speed control. ______ are available in many different sizes and models
Most ________ used for aircraft sheet metal work are rated at 3 000 rpm, but if drilling deep holes or drilling in hard materials, such as corrosion resistant steel or titanium, a ________ with more torque and lower rpm should be selected to prevent damage to tools and materials

A

Pneumatic drill motors

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7
Q

Special drill motors that drill two holes at the same time are used for the installation of nutplates. By drilling two holes at the same time, the distance between the holes is fixed and the holes line up perfectly with the holes in the nutplate

A

TWO-HOLE DRILL MOTORS

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8
Q

The _______ is a flexible extension used for drilling in places inaccessible to ordinary drills.
Available for electric and pneumatic drill motors, its flexibility permits drilling around obstructions with minimum effort

A

snake attachment

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9
Q

The _________ is a precision machine used for drilling holes that require a high degree of accuracy. It serves as an accurate means of locating and maintaining the direction of a hole that is to be drilled and provides the operator with a feed lever that makes the task of feeding the drill into the work easier. The upright drill press is the most common of the variety of drill presses Available

A

drill press

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10
Q

The drill speed on a drill press is adjustable. Always select the optimum drill speed for the material to be drilled. Technically, the speed of a drill bit means its speed at the circumference, in surface feet per minute (sfm). The recommended speed for drilling aluminum alloy is from ___1____ sfm, and for mild steel is ____2____ sfm. In practice, this must be converted into rpm for each size drill. Machinist and mechanic handbooks include drill rpm charts or drill rpm may be computed by use of the formula: ____3____

A

200 to 300

30 to 50

CS x 4 = RPM
D

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11
Q

A wide variety of drill bits including specialty bits for specific jobs are available. High Speed Steel (HSS) drill bits come in short shank or standard length, sometimes called jobbers length. HSS drill bits can withstand temperatures nearing the critical range of ______ (dark cherry red) without losing their hardness. The industry standard for drilling metal (aluminum, steel, etc.), these drill bits stay sharper longer

A

1 400°

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12
Q

________ drill bits are designed for hard, tough metals like corrosion-resistant steel and titanium. It is important for the aircraft technician to note the difference between HSS and ________.
HSS drill bits wear out quickly when drilling titanium or stainless. ______ bits are excellent for drilling titanium or stainless steel, but do not produce a quality hole in aluminum alloys. ________l bits can be recognized by _____2_______

A

Cobalt alloy

thicker webs and a taper at the end of the drill shank

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13
Q

__________ drill bits (most commonly available) are used for originating holes.

A

Single- fluted and two-fluted

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14
Q

_________ drill bits are used interchangeably to enlarge existing holes

A

Three-fluted and four-fluted

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15
Q

The principal parts of a twist drill are ____________

A

the shank, the body, and the heel

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16
Q

The best size for a punch mark is about the __________ of the drill bit to be used.

A

width of the chisel edge

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17
Q

Avoid using a pilot drill bit that is too large because it would cause the corners and cutting lips of the final drill bit to be ___________.

A

dulled, burned, or chipped

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18
Q

A ________ is a wise investment. Properly adjusted, it can prevent excessive drill penetration that might damage underlying structure or injure personnel and prevent the drill chuck from marring the surface.
_________ can be made from tubing, fiber rod, or hard rubber.

A

spring drill stop

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19
Q

Actual cutting is done on _____ of the reamer

A

the end

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20
Q

___1___ are used to smooth and enlarge holes to exact size. Hand ____1___ have square end shanks so that they can be turned with a tap wrench or similar handle.
A hole that is to be ___1___ to exact size must be drilled about _____2___ inch under size. A cut that removes more than 0.007 inch places too much load on the reamer and should not be attempted

A

Reamers

0.003 to 0.007

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21
Q

A ___1__ is used to cut threads on the inside of a hole, while a ____2___ is for cutting external threads on round stock

A

tap

die

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22
Q

The _______ is used to begin the tapping process, because it is tapered back for 6 to 7 threads. This tap cuts a complete thread when it is cutting above the taper. It is the only tap needed when tapping holes that extend through thin sections.

A

taper tap

23
Q

The _______ supplements the taper tap for tapping holes in thick stock.

A

plug tap

24
Q

The _______ is not tapered. It is used to cut full threads to the bottom of a blind hole

A

bottoming tap

25
Q

Recommended lubricants for some common materials are:
· : kerosene mixed with 15% petroleum cutting fluid

A

Bronze

26
Q

Recommended lubricants for some common materials are:
· : kerosene or mineral spirits.

A

Brass

27
Q

Recommended lubricants for some common materials are:
· : kerosene mixed with 20% petroleum cutting fluid.

A

Aluminum

28
Q

Recommended lubricants for some common materials are:
· : petroleum cutting fluid mixed 10% with kerosene.

A

Alloy steel

29
Q

Recommended lubricants for some common materials are:
· : petroleum or synthetic cutting fluid.

A

Carbon steel

30
Q

The __________ is designed for use in making bends or folds along edges of sheets. This machine is best suited for folding small hems, flanges, seams, and edges to be wired. Most ______ have a capacity for metal up to 22 gauge in thickness and 42 inches in length. Before using the _________, several adjustments must be made for thickness of material, width of fold, sharpness of fold, and angle of fold

A

bar folder

31
Q

A ______ is similar to a bar folder because it is also used for turning or bending the edges of sheet metal. The _______ is more useful than the bar folder because its design allows the sheet metal to be folded or formed to pass through the jaws from front to rear without obstruction. In contrast, the bar folder can form a bend or edge only as wide as the depth of its jaws

A

cornice brake

32
Q

The ________, often called the finger brake because it is equipped with a series of steel fingers of varying widths, lacks the solid upper jaw of the cornice Brake. The _______ can be used to do everything that the cornice brake can do, as well as several things the cornice brake cannot do
The _______ is used to form boxes, pans, and other similar shaped objects. If these shapes were formed on a cornice brake, part of the bend on one side of the box would have to be straightened in order to make the last bend
The fingers are secured to the upper leaf by thumbscrews. All the fingers not removed for an operation must be securely seated and firmly tightened before the brake is used

A

box and pan brake

33
Q

Since most cornice brakes and box and pan brakes are limited to a maximum forming capacity of approximately 0.090 inch annealed aluminum, 0.063-inch 7075T6, or 0.063-inch stainless steel, operations that require the forming of thicker and more complex parts use a _______.
The _______ is the most common machine tool used to bend sheet metal and applies force via mechanical and/or hydraulic components to shape the sheet metal between the punch and die. Narrow U-channels (especially with long legs) and hat channel stringers can be formed on the _________ by using special gooseneck or offset dies

A

press brake

34
Q

This machine is used to form sheets into cylinders or other straight curved surfaces. It consists of right and left end frames with three solid rolls mounted in between. Gears, which are operated by either a hand crank or a power drive, connect the two gripping rolls.
These rolls can be adjusted to the thickness of the metal by using the two adjusting screws located on the bottom of each frame.

A

SLIP ROLL FORMER

35
Q

This basic DC type of meter movement in making electrical measurement, is a current measuring device, which is used in the ammeter, voltmeter, and ohmmeter. The pointer is deflected in proportion to the amount of current through the coil. Basically, both the ammeter and the voltmeter are current measuring instruments, the principal difference being the method in which they are connected in a circuit. While an ohmmeter is also basically a current measuring instrument, it differs from the ammeter and voltmeter in that it provides its own source (self-excited) of power and contains other auxiliary circuits

A

D’ARSONVAL METER MOVEMENT

36
Q

The ______________ is the amount of current required to drive the meter movement to a full-scale deflection. A simple example would be a meter movement that has 1mA sensitivity. What this indicates is that meter movement will require 1mA of current to move the needle to a full-scale indication. Likewise a half scale deflection will require only 0.5mA of current. Additionally, what is called movement resistance is the actual DC resistance of the wire used to construct the meter coil.
A standard d’Arsonval meter movement may have a current sensitivity of 1mA and a resistance of 50Q. If the meter is going to be used to measure more than 1mA then additional circuitry will be required to accomplish the task. This additional circuitry is a simple shunt resistor.

A

current sensitivity of a meter movement

37
Q

To make meter readings quickly and accurately, it is desirable that the moving pointer overshoot its proper position only a small amount and come to rest after not more than one or two small oscillations. The term “______” is applied to methods used to bring the pointer of an electrical meter to rest after it has been set in motion. _______ may be accomplished by electrical means, by mechanical means, or by a combination of both.

A

damping

38
Q

A common method of _________ means is to wind the moving coil on an aluminum frame. As the coil moves in the field of the permanent magnet, eddy currents are set up in the aluminum frame. The magnetic field produced by the eddy currents opposes the motion of the coil. The pointer will therefore swing more slowly to its proper position and come to rest quickly with very little oscillation

A

damping by electrical

39
Q

The meter movement used for the ammeter and the voltmeter can also be used for the ________.

A

ohmmeter

40
Q

When voltmeters are used, they are connected in _____ with a circuit. If unsure about the voltage to be measured, take the first reading at the high value on the meter and then progressively move down through the range until a suitable reading is obtained. Observe that the polarity is correct before connecting the meter to the circuit or damage will occur by driving the movement backwards.

A

parallel

41
Q

The chief advantage of the megger over an ohmmeter is its capacity to measure resistance with a _____________.

A

high potential, or “breakdown” voltage

42
Q

The _________ can be used to measure alternating or direct voltage and current. It operates on the same principles as the permanent magnet moving coil meter, except that the permanent magnet is replaced by an air core electromagnet.
The field of the ________ is developed by the same current that flows through the moving coil

A

electrodynamometer

43
Q

Multiplying the volts by the amperes in an AC circuit gives the apparent power: the combination of the true power (which does the work) and the reactive power (which does no work and is returned to the line). Reactive power is measured in units of vars (volt-amperes reactive) or kilovars (kilovolt-amperes reactive, abbreviated kVAR). When properly connected, wattmeters measure the reactive power. As such, they are called ________.

A

varmeters

44
Q

A ________is a thin abrasive disc driven by a highspeed pneumatic die-grinder and used to cut out damage on aircraft skin and stringers. The wheels come in different thicknesses and sizes

A

CUT-OFF WHEEL

45
Q

A _______ is a handheld tool that turns a mounted cutoff wheel, rotary file, or sanding disk at high speed
Usually powered by compressed air, electric _____are also used. Pneumatic _________ run at 12 000 to 20 000 revolutions per minute (rpm) with the rotational speed controlled by the operator who uses a hand or foot-operated throttle to vary the volume of compressed air. Available in straight,45°, and 90° models, the _____is excellent for weld breaking, smoothing sharp edges, deburring, porting, and general high-speed polishing, grinding, and cutting.

A

die grinder

46
Q

Electric power is measured by means of a ______ . Because electric power is the product of current and voltage, a _____must have two elements, one for current and the other for voltage.
The movable coil with a series resistance forms the voltage element, and the stationary coils constitute the current element. The strength of the field around the potential coil depends on the amount of current that flows through it. The current, in turn, depends on the load voltage applied across the coil and the high resistance in series with it. The strength of the field around the current coils depends on the amount of current flowing through the load. Thus, the meter deflection is proportional to the product of the voltage across the potential coil and the current through the current coils.

A

wattmeter

47
Q

________ are used to cut holes, curved parts, round patches, and doublers (a piece of metal placee under a part to make it stiffer) in sheet metal.

A

Aviation snips

48
Q

________, or sheet metal shears, have straight blades with cutting edges sharpened to an 85° angle Available in sizes ranging from 6 to 14 inches, they cut aluminum up to 1/16 of an inch.

A

Straight snips

49
Q

Straight snips, or sheet metal shears, have straight blades with cutting edges sharpened to an 85° angle Available in sizes ranging from______ inches, they cut aluminum up to _____ of an inch

A

6 to 14
1/16

50
Q

Struck with a mallet, the _______ uses cam action to impart a high amount of torque in a sharp impact to break loose a stubborn fastener.

A

impact driver

51
Q

The force is measured by the amount the beam deflects or by the tension set by a calibrated spring inside the wrench handle. _______ states that the amount a beam deflects is directly related to the force applied

A

Hooke’s Law

52
Q

Practically all well- manufactured box-end wrenches are made with 12 points so they can be used in places having as little as ____ swing

A

15°

53
Q

The misuse of pliers or other gripping tools can quickly damage these parts. If it is necessary to grip a part to hold it in place, or to rotate it to facilitate removal, consider using a ________ that uses a plastic covered fabric strap to grip the part

A

strap wrench

Module 7 (22 decks)

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