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2AX5X Volume 1 Chapter 4
2AX5X Volume 1 Chapter 4 Self-Test Questions
76
Aerospace Engineering
Not Applicable
06/28/2014

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Term
What TO covers aircraft hardware?
Definition
1-1A-8.
Term
The size of a bolt is stated in what terms?
Definition
Length, diameter, and threads per inch.
Term
Define the grip length of a bolt.
Definition
Unthreaded portion.
Term
What type of bolt is available with thin heads for use in tight places?
Definition
Hexhead.
Term
What kind of bolt is used where shearing or sideways stress occurs?
Definition
Clevis.
Term
What special-purpose bolt is used where external tension loads are applied?
Definition
Eyebolt.
Term
What feature distinguishes the internal wrenching bolt from other bolts?
Definition
The head is recessed.
Term
List three kinds of nonself-locking nuts.
Definition
  1. Plain.
  2. Check.
  3. Castle.
  4. Wing. 
Term
List two uses for plain washers.
Definition
  1. Provide a smooth bearing surface.
  2. Act as shims in obtaining the correct relationship between threads of the bolt and the nut. 
  3. Adjust the portion of castellated nuts with respect to the drilled cotter pin holes. 
  4. Under lockwashers to prevent damage to surfaces of soft material. 
Term
How are screws usually described?
Definition
According to the shape of the head
Term
What type of rivet is usually used for fastening aircraft structures?
Definition
Common, solid shank.
Term
What type of aircraft fastener is not designed to carry a structural load?
Definition
Quick-release.
Term
How is a cable size determined?
Definition
By the diameter of the cable.
Term
Why are some cables coated with a nylon jacket?
Definition
To increase the service life of the cable by keeping lubricants in and dirt out and dampening vibration.
Term
What is the purpose of a turnbuckle?
Definition
To adjust tension on aircraft cables.
Term
Pulleys are made of what?
Definition
Typically molded or machined phenolic of light alloy metal such as aluminum.
Term
What keeps cables from coming in contact with structural parts of the aircraft?
Definition
Fairleads.
Term
What’s the purpose of a pressure seal?
Definition
To prevent the loss of pressure from pressurized areas through which cables pass
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?
Definition
Quadrants and bellcranks.
Term
What is a control rod?
Definition
A rigid rod that transmits push and pull motions.
Term
What devices limit the movement of a control surface?
Definition
Stops
Term
Where are torque tubes used in flight control systems?
Definition
Where they’re needed to transmit a twisting force.
Term
How are aluminum alloy and stainless steel tubing easily distinguished?
Definition
By their different metallic luster; aluminum alloy tubing may be stamped with the actual alloy designation.
Term
Where is aluminum-alloy tubing commonly used?
Definition
As a return line.
Term
Why is stainless steel tubing preferred on external brake lines and other exposed system lines?
Definition
To prevent damage caused by flying gravel and stones and ground-handling accidents.
Term
What color is an aluminum alloy tube fitting?
Definition
Blue.
Term
Describe the color-code tape used in identifying hydraulic lines.
Definition
Blue band, a yellow band, and a white band overprinted with a row of black-bordered circles.
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?
Definition
Three; one on the 13 inch section and two on the 25 inch section.
Term
Before you install a tubing assembly, you should inspect it for what conditions?
Definition
Obstructions, dents, scratches, and damage to the flared end.
Term
What can result from over-tightening a tubing nut?
Definition
Severe damage to the tubing flare or damage to the sleeve or nut of the fitting.
Term
What information can be obtained from the markings on flexible hose?
Definition
The manufacturer’s code number or symbol marking, date of manufacture, size, and specification numbers.
Term
What prevents chafing of a hose passing through a bulkhead?
Definition
Bulkhead-type grommets or cushion clips
Term
How should hose connections be made to an engine or engine-mounted accessories?
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.
Term
What safety-wire method is most commonly used?
Definition
Double-twist.
Term
Using the double-twist method, how many closely spaced bolts can be safetied in a series?
Definition
No more than you can secure with a 24 inch length of wire
Term
When is 0.032 inch safety cable used to safety parts?
Definition
When parts have a nominal hole diameter of 0.075 inch or smaller.
Term
What is a retaining ring?
Definition
A retaining ring is a fastener that holds components onto a shaft or in a housing/bore when installed in a groove.
Term
Where are axially assembled retaining rings installed?
Definition
Installed into machined grooves in housings or on shafts.
Term
How are beveled retaining rings held in place?
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.
Term
When are spiral retaining rings used?
Definition
When there is little clearance between the housing and the part to be retained.
Term
What parts of a Cannon plug ensure connector halves aren’t mismated?
Definition
A key and keyway arrangement in the barrel of the plug and receptacle
Term
AN-type Cannon plugs are being replaced with what type of plugs?
Definition
MS
Term
What TO provides information concerning connector repair?
Definition
1-1A-14.
Term
Why is aluminum foil not used as a cover for Cannon plugs?
Definition
May cause a short circuit.
Term
Why should you not attempt to remove a Cannon plug’s insert from the shell?
Definition
It is permanently bonded and can’t be removed without destroying it.
Term
What do torque wrenches measure?
Definition
The force of pull in pounds when tightening hardware; nuts, bolts, clamps, etc.
Term
How do indicating-type torque wrenches display the applied torque?
Definition
By a pointer that moves over an indicating scale.
Term
What type of torque wrench automatically releases when you apply a predetermined amount of torque?
Definition
Breakaway.
Term
How much free travel does the breakaway torque wrench allow when the preset torque level is reached?
Definition
Approximately 5 to10 degrees.
Term
What may happen if you over-tighten a component greater than the value set on a torque wrench?
Definition
It may cause internal damage to the torque wrench, it adds a higher torque value to the part, and part failure could occur.
Term
What is the working range of a breakaway or indicating type torque wrench?
Definition
Not lower than 20 percent and not greater than the rated capacity of the torque wrench.
Term
When torquing a bolt, to what should you set the torque value?
Definition
The upper limit of the specific torque value allowed by the TO.
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.
Definition
No; gradually tighten each until they all meet the specified torque and tighten the nuts opposite of each other in sequence.
Term
Before storing a torque wrench, to what setting should you set the grip? Why?
Definition
Lowest; this removes tension from the spring in the handle and preserves the accuracy of the torque wrench.
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?
Definition
The calibration date.
Term
What do you do if you discover that a torque wrench is overdue calibration?
Definition
Don’t use it; turn it in for calibration.
Term
What are the two stresses a fastener takes when tightened?
Definition
  1. Torsion
  2. Tension. 
Term
Why is breakaway torque measured?
Definition
To ensure product integrity.
Term
What is prevailing torque usually associated with?
Definition
Self-locking screws and nuts.
Term
What is a multimeter?
Definition
A combined instrument consisting of an ammeter, voltmeter, and ohmmeter.
Term
What is the major advantage of the Fluke multimeter?
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.
Term
How many input receptacles does the Fluke meter have?
Definition
Four.
Term
What are the different Fluke meter modes of operation?
Definition
Range, relative, minimum/maximum, and hold-reset/MIN/MAX.
Term
When does the Fluke meter perform a self-test?
Definition
Every time you turn the meter on.
Term
Which measuring technique should you use for troubleshooting for a loose wire?
Definition
Continuity.
Term
What should be done if the digital meter goes from OL to 0 when performing a continuity check?
Definition
Continue using it (this is the normal indication).
Term
What is a feeler gauge?
Definition
A tool used to measure the gap between two parts.
Term
What is incorporated into the feeler gauge case?
Definition
A locking screw.
Term
What are three commonly used micrometers?
Definition
Outside micrometers, inside micrometers, depth micrometers.
Term
What determines a micrometer’s “range”?
Definition
The longest movement possible between the spindle and anvil of the micrometer.
Term
What do outside calipers measure?
Definition
Outside diameters.
Term
How are simple calipers adjusted?
Definition
By pulling or pushing the legs to open or close them.
Term
What are transfer calipers used for?
Definition
Measuring chamfered grooves or flanges.
Term
How are slide calipers graduated?
Definition
Inches, fractions, or millimeters.
Term
What is used on depth gauges as the reference surface or master standard from which measurements are taken?
Definition
The supporting block.
Term
What must be done to the depth gauge before any measurements are taken?
Definition
You must zero the gauge before measuring any depth.
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