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What type of line is normally used in a drawing or blueprint that indicates invisible edges or contours?
Medium-weight short dashes evenly spaced.
(Refer to Figure 27.) In the isometric view of a typical aileron balance weight, identify the view indicated by the arrow.
3
(1) A detail drawing is a description of a single part.
(2) An assembly drawing is a description of an object made up of two or more parts.
Regarding the above statements,
Both one and two are true
(Refer to Figure 28.) Identify the bottom view of the object shown.
2
A specific measured distance from the datum or some other point identified by the manufacturer, to a point in or on the aircraft is called a
Station number
Which statement is true regarding an orthographic projection?
-One-view, two-view, and three-view drawings are the most common.
(Refer to Figure 29.) Identify the left side view of the object shown.
3
A line used to show an edge which is not visible is a
Hidden line
What type of drawing line consists of alternating ong and short lines?
Center
(Refer to Figure 30. Identify the bottom view of the object.
1
(1) Schematic diagrams indicate the location of individual components in the aircraft.
(2) Schematic diagrams indicate the location of components with respect to each other within the system.
Regarding the above statements,
Only two is true
(Refer to Figure 31.) What are the proper procedural steps for sketching repairs and alterations?
3, 1, 4, and 2
Which statement is applicable when using a sketch for making a part?
The sketch must show all information to manufacture the part.
(Refer to Figure 32.) What is the next step required for a working sketch of the illustration?
Sketch extension and dimension lines
For sketching purposes, almost all objects are composed of one or some combination of six basic shapes; these include the
triangle, circle, cube, cylinder, cone, and sphere.
In a sectional view drawing, what sections illustrate particular parts of an object?
Removed
What should be the first step of the procedure in sketching an aircraft wing skin repair?
Block in the views
A simple way to find the center of a circle on a sketch or drawing, or a circular piece of material is to
draw two parallel chord lines across the circle and then a corresponding perpendicular bisector line across each chord line.
(1) According to 14 CFR Part 91, repairs to an aircraft skin should have a detailed dimensional sketch included in the permanent records.
(2) On occasion, a mechanic may need to make a simple sketch of a proposed repair to an aircraft, a new design, or a modification.
Regarding the above statements,
Only 2 is true
Working drawings may be divided into three classes. They are:
-detail drawings, assembly drawings, and installation drawings.
What is the class of working drawing that is the description/depiction of a single part?
Detail drawing
Sketches are usually made easier by the use of
Graph paper
(1) sketches are usually made with the aid of drafting instruments
(2) sketches are usually more complicated to make when using graph paper
Neither is true
What material symbol is frequently used in drawings to represent all metals?
Cast iron
What is used to indicate that a surface must be machine finished?
Finished marks
Ref to fig 33 — which material section line symbol indicates cast iron
3
(Refer to Figure 34.) What is the dimension of the chamfer?
-0.0625 × 45°.
(Refer to Figure 34.) What is the maximum diameter of the hole for the clevis pin?
0.3175
(Refer to Figure 34.) What would be the minimum diameter of 4130 round stock required for the construction of the clevis that would produce a machined surface?
1 inch
(Refer to Figure 34.) Using the information, what size drill would be required to drill the clevis bolthole?
5/16 inch
The measurements showing the ideal or "perfect" sizes of parts on drawings are called
Dimensions
(Refer to Figure 35.) Identify the extension line.
3
(Refer to Figure 36.) The diameter of the holes in the finished object is
½ inch
Zone numbers on aircraft blueprints are used to
-locate parts, sections, and views on large drawings.
Which of the following terms is/are used to indicate specific measured distances from the datum and/or other points identified by the manufacturer, to points in or on the aircraft?
Zone numbers.
Reference numbers.
Station numbers.
3
In order to locate wing and stabilizer frames, what numbering system is used?
Station numbers
One purpose for schematic diagrams is to show the
functional location of components within a system.
When reading a blueprint, a dimension is given as
4.387 inches +.005 -.002. Which statement is true?
The minimum acceptable size is 4.385 inches.
What is the allowable manufacturing tolerance for a bushing where the outside dimensions shown on the blueprint are:
1.0625 +.0025 -.0003?
.0028
A hydraulic system schematic drawing typically indicates the
direction of fluid flow through the system.
(Refer to Figure 37.) The vertical distance between the top of the plate and the bottom of the lowest 15/64-inch hole is
2.367
(1) A measurement should not be scaled from an aircraft print because the paper shrinks or stretches when the print is made.
(2) When a detail drawing is made, it is carefully and accurately drawn to scale, and is dimensioned.
Regarding the above statements,
Both are true
The drawings often used in illustrated parts manuals are
Exploded view drawing
A drawing in which the subassemblies or parts are shown as brought together on the aircraft is called
an installation drawing.
What type of diagram shows the wire size required for a particular installation?
-A wiring diagram.
In what type of electrical diagram are images of components used instead of conventional electricaL symbols?
Pictorial diagram
Schematic diagrams are best suited for which of the following?
-Troubleshooting system malfunctions.
In the reading of aircraft blueprints, the term "toler-ance," used in association with aircraft parts or compo-nents,
is the difference between extreme permissible dimensions that a part may have and still be acceptable.
(Refer to Figure 38.) An aircraft reciprocating engine has a 1,830 cubic-inch displacement and develops 1,250 brake-horsepower at 2,500 RPM. What is the brake mean effective pressure?
217
(Refer to Figure 38.) An aircraft reciprocating engine has a 2,800 cubic-inch displacement, develops 2,000 brake-horsepower, and indicates 270 brake mean effective pressure. What is the engine speed (RPM)?
2100
(Refer to Figure 38.) An aircraft reciprocating engine has a 2,800 cubic-inch displacement and develops 2,000 brake-horsepower at 2,200 RPM. What is the brake mean effective pressure?
257.5
(Refer to Figure 39. Determine the cable size of a
40-foot length of single cable in free air, with a continuous rating, running from a bus to the equipment in a 28-volt system with a 15-ampere load and a 1-volt drop.
No. 10
(Refer to Figure 39.) Determine the maximum length of a No. 16 cable to be installed from a bus to the equipment in a 28-volt system with a 25-ampere intermittent load and a 1-volt drop.
8 ft
(Refer to Figure 39) Determine the minimum wire size of a single cable in a bundle carrying a continuous current of 20 amperes 10 feet from the bus to the equipment in a 28-volt system with an allowable 1-volt drop.
No. 12
(Refer to Figure 39.) Determine the maximum length of a No. 12 single cable that can be used between a 28-volt bus and a component utilizing 20 amperes continuous load in free air with a maximum acceptable 1-volt drop.
26.5
(Refer to Figure 40.) Determine the proper tension for a 1/8-inch cable (7 x 19) if the temperature is 80°F.
70 pounds
Ref to fig 40 — determine the proper tension for a 3/16 inch cable ( 7 × 19 extra flex) if the temp is 87’F
125 pounds
ref to fig 41 — Determine how much fuel would required for a 30 min reserve operating at 2300 rpm
25.3 pounds
Ref to fig 41 — determine the fuel consumption with the engine operating at cruise 2350 rpm
55.3 pounds per hour
Note
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