Term
| What TO covers aircraft hardware? |
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Definition
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Term
| The size of a bolt is stated in what terms? |
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Definition
| Length, diameter, and threads per inch. |
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Term
| Define the grip length of a bolt. |
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Definition
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Term
| What type of bolt is available with thin heads for use in tight places? |
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Definition
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Term
| What kind of bolt is used where shearing or sideways stress occurs? |
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Definition
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Term
| What special-purpose bolt is used where external tension loads are applied? |
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Definition
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Term
| What feature distinguishes the internal wrenching bolt from other bolts? |
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Definition
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Term
| List three kinds of nonself-locking nuts. |
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Definition
- Plain.
- Check.
- Castle.
- Wing.
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Term
| List two uses for plain washers. |
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Definition
- Provide a smooth bearing surface.
- Act as shims in obtaining the correct relationship between threads of the bolt and the nut.
- Adjust the portion of castellated nuts with respect to the drilled cotter pin holes.
- Under lockwashers to prevent damage to surfaces of soft material.
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Term
| How are screws usually described? |
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Definition
| According to the shape of the head |
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Term
| What type of rivet is usually used for fastening aircraft structures? |
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Definition
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Term
| What type of aircraft fastener is not designed to carry a structural load? |
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Definition
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Term
| How is a cable size determined? |
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Definition
| By the diameter of the cable. |
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Term
| Why are some cables coated with a nylon jacket? |
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Definition
| To increase the service life of the cable by keeping lubricants in and dirt out and dampening vibration. |
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Term
| What is the purpose of a turnbuckle? |
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Definition
| To adjust tension on aircraft cables. |
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Term
| Pulleys are made of what? |
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Definition
| Typically molded or machined phenolic of light alloy metal such as aluminum. |
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Term
| What keeps cables from coming in contact with structural parts of the aircraft? |
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Definition
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Term
| What’s the purpose of a pressure seal? |
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Definition
| To prevent the loss of pressure from pressurized areas through which cables pass |
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Term
| What units are used to transmit motion about an axis and to change the direction of force of a cable or push-pull rod? |
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Definition
| Quadrants and bellcranks. |
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Term
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Definition
| A rigid rod that transmits push and pull motions. |
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Term
| What devices limit the movement of a control surface? |
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Definition
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Term
| Where are torque tubes used in flight control systems? |
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Definition
| Where they’re needed to transmit a twisting force. |
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Term
| How are aluminum alloy and stainless steel tubing easily distinguished? |
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Definition
| By their different metallic luster; aluminum alloy tubing may be stamped with the actual alloy designation. |
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Term
| Where is aluminum-alloy tubing commonly used? |
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Definition
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Term
| Why is stainless steel tubing preferred on external brake lines and other exposed system lines? |
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Definition
| To prevent damage caused by flying gravel and stones and ground-handling accidents. |
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Term
| What color is an aluminum alloy tube fitting? |
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Definition
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Term
| Describe the color-code tape used in identifying hydraulic lines. |
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Definition
| Blue band, a yellow band, and a white band overprinted with a row of black-bordered circles. |
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Term
| A system line is 38 inches long and passes through a bulkhead. The bulkhead divides the line so that 25 inches are on one side. How many bands of tape should the line have? |
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Definition
| Three; one on the 13 inch section and two on the 25 inch section. |
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Term
| Before you install a tubing assembly, you should inspect it for what conditions? |
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Definition
| Obstructions, dents, scratches, and damage to the flared end. |
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Term
| What can result from over-tightening a tubing nut? |
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Definition
| Severe damage to the tubing flare or damage to the sleeve or nut of the fitting. |
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Term
| What information can be obtained from the markings on flexible hose? |
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Definition
| The manufacturer’s code number or symbol marking, date of manufacture, size, and specification numbers. |
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Term
| What prevents chafing of a hose passing through a bulkhead? |
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Definition
| Bulkhead-type grommets or cushion clips |
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Term
| How should hose connections be made to an engine or engine-mounted accessories? |
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Definition
| Install the hose so 1½ inches of slack or an adequate bend is provided between the last point of support and the attachment to the engine or accessory. |
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Term
| What safety-wire method is most commonly used? |
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Definition
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Term
| Using the double-twist method, how many closely spaced bolts can be safetied in a series? |
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Definition
| No more than you can secure with a 24 inch length of wire |
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Term
| When is 0.032 inch safety cable used to safety parts? |
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Definition
| When parts have a nominal hole diameter of 0.075 inch or smaller. |
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Term
| What is a retaining ring? |
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Definition
| A retaining ring is a fastener that holds components onto a shaft or in a housing/bore when installed in a groove. |
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Term
| Where are axially assembled retaining rings installed? |
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Definition
| Installed into machined grooves in housings or on shafts. |
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Term
| How are beveled retaining rings held in place? |
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Definition
| Beveled retaining rings feature a beveled or angled edge. This angle allows the ring to wedge itself between the groove and the retained part until it can go no farther, effectively “locking” everything in place. |
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Term
| When are spiral retaining rings used? |
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Definition
| When there is little clearance between the housing and the part to be retained. |
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Term
| What parts of a Cannon plug ensure connector halves aren’t mismated? |
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Definition
| A key and keyway arrangement in the barrel of the plug and receptacle |
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Term
| AN-type Cannon plugs are being replaced with what type of plugs? |
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Definition
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Term
| What TO provides information concerning connector repair? |
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Definition
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Term
| Why is aluminum foil not used as a cover for Cannon plugs? |
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Definition
| May cause a short circuit. |
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Term
| Why should you not attempt to remove a Cannon plug’s insert from the shell? |
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Definition
| It is permanently bonded and can’t be removed without destroying it. |
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Term
| What do torque wrenches measure? |
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Definition
| The force of pull in pounds when tightening hardware; nuts, bolts, clamps, etc. |
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Term
| How do indicating-type torque wrenches display the applied torque? |
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Definition
| By a pointer that moves over an indicating scale. |
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Term
| What type of torque wrench automatically releases when you apply a predetermined amount of torque? |
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Definition
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Term
| How much free travel does the breakaway torque wrench allow when the preset torque level is reached? |
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Definition
| Approximately 5 to10 degrees. |
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Term
| What may happen if you over-tighten a component greater than the value set on a torque wrench? |
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Definition
| It may cause internal damage to the torque wrench, it adds a higher torque value to the part, and part failure could occur. |
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Term
| What is the working range of a breakaway or indicating type torque wrench? |
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Definition
| Not lower than 20 percent and not greater than the rated capacity of the torque wrench. |
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Term
| When torquing a bolt, to what should you set the torque value? |
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Definition
| The upper limit of the specific torque value allowed by the TO. |
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Term
| When you’re using a torque wrench to tighten a series of nuts, do you tighten each nut to the specified torque before starting to torque the other nuts? Explain. |
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Definition
| No; gradually tighten each until they all meet the specified torque and tighten the nuts opposite of each other in sequence. |
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Term
| Before storing a torque wrench, to what setting should you set the grip? Why? |
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Definition
| Lowest; this removes tension from the spring in the handle and preserves the accuracy of the torque wrench. |
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Term
| Torque wrenches should have some kind of label (paper, tape, or other) on the handle. What information do you determine from this label before using the torque wrench? |
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Definition
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Term
| What do you do if you discover that a torque wrench is overdue calibration? |
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Definition
| Don’t use it; turn it in for calibration. |
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Term
| What are the two stresses a fastener takes when tightened? |
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Definition
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Term
| Why is breakaway torque measured? |
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Definition
| To ensure product integrity. |
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Term
| What is prevailing torque usually associated with? |
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Definition
| Self-locking screws and nuts. |
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Term
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Definition
| A combined instrument consisting of an ammeter, voltmeter, and ohmmeter. |
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Term
| What is the major advantage of the Fluke multimeter? |
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Definition
| The ability to take readings without having to look at the display at the same time as you are looking at the test leads. |
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Term
| How many input receptacles does the Fluke meter have? |
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Definition
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Term
| What are the different Fluke meter modes of operation? |
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Definition
| Range, relative, minimum/maximum, and hold-reset/MIN/MAX. |
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Term
| When does the Fluke meter perform a self-test? |
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Definition
| Every time you turn the meter on. |
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Term
| Which measuring technique should you use for troubleshooting for a loose wire? |
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Definition
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Term
| What should be done if the digital meter goes from OL to 0 when performing a continuity check? |
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Definition
| Continue using it (this is the normal indication). |
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Term
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Definition
| A tool used to measure the gap between two parts. |
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Term
| What is incorporated into the feeler gauge case? |
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Definition
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Term
| What are three commonly used micrometers? |
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Definition
| Outside micrometers, inside micrometers, depth micrometers. |
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Term
| What determines a micrometer’s “range”? |
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Definition
| The longest movement possible between the spindle and anvil of the micrometer. |
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Term
| What do outside calipers measure? |
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Definition
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Term
| How are simple calipers adjusted? |
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Definition
| By pulling or pushing the legs to open or close them. |
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Term
| What are transfer calipers used for? |
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Definition
| Measuring chamfered grooves or flanges. |
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Term
| How are slide calipers graduated? |
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Definition
| Inches, fractions, or millimeters. |
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Term
| What is used on depth gauges as the reference surface or master standard from which measurements are taken? |
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Definition
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Term
| What must be done to the depth gauge before any measurements are taken? |
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Definition
| You must zero the gauge before measuring any depth. |
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