Unit 2: Study of Aero modelling tools - Practice Quiz

1 Which tool is commonly used to cut thin balsa wood for an aero model?

2 What is the main purpose of a sanding block in aero modelling?

3 Which tool is best suited for measuring the length of a model-aircraft wing?

4 What is the primary use of a cutting mat?

5 Which tool helps hold model parts together while an adhesive dries?

6 Which tool is used to check whether two model parts meet at a right angle?

7 What is a hand drill used for during aero-model construction?

8 Which tool can smooth a small curved or narrow model component?

9 What is the main application of a drawing compass in aero modelling?

10 Why is a steel ruler often preferred as a guide for a craft knife?

11 In which direction should a craft knife normally be moved while cutting?

12 What should be done before using an aero-modelling tool?

13 How should a craft knife be stored after use?

14 Which protective item is most appropriate when sanding model components?

15 How should small parts be held while they are being drilled?

16 What should you do if a craft-knife blade becomes blunt?

17 Why should the work area be kept tidy during aero modelling?

18 What is the safest way to pass a sharp modelling tool to another person?

19 What should you wear to protect your eyes when drilling or cutting model materials?

20 How should a sanding block be moved to produce a controlled finish?

21 Which tool is most suitable for checking whether a model aircraft wing has the same angle of incidence on both sides?

22 When cutting a straight line in thin balsa wood with a hobby knife, which method gives the safest and cleanest result?

23 A builder wants to produce several identical wing ribs from a single airfoil drawing. Which approach is most appropriate?

24 Why should a cutting mat be placed beneath a model part when using a hobby knife?

25 Which instrument should be used to measure the thickness of a small plywood component accurately to the nearest fraction of a millimetre?

26 A drill bit begins wandering away from the required hole position on a plywood firewall. What should the builder do before drilling again?

27 What is the main application of a building jig during fuselage assembly?

28 A sanding block is being used to shape the leading edge of a balsa wing. Which practice best reduces the risk of forming unwanted low spots?

29 In a computer-aided aero-modelling workflow, what is the main purpose of a flight simulator before constructing the physical model?

30 When using a hot-wire cutter to shape foam, why should the wire move through the material at a steady rate?

31 A model aircraft repeatedly rolls to one side during a glide test. Which tool is most useful for checking whether unequal wing-panel angles are causing the problem?

32 What should be done immediately before using a soldering iron to join two electrical wires in a model aircraft?

33 Which tool combination is most appropriate for confirming that a vertical stabilizer is perpendicular to the horizontal stabilizer?

34 A builder must clamp a soft balsa component without leaving dents. Which method is most appropriate?

35 What is the main purpose of a propeller balancer in aero modelling?

36 While using cyanoacrylate adhesive near a close-fitting joint, which applicator offers the best control?

37 A CAD model shows two structural parts occupying the same space. Which software function should be used to identify this assembly problem?

38 Why should the blade of a hobby knife be replaced when it becomes dull?

39 A completed model must be checked to see whether its centre of gravity is at 30% of a wing chord measuring . Where should the balance point be marked from the leading edge?

40 Before measuring a component with a digital caliper, what action best helps prevent a systematic measurement error?

41 An incidence meter reads the wing chord at and the stabilizer chord at relative to the same fuselage datum. If the model was resting with that datum tilted by relative to the bench, what is the wing-to-stabilizer decalage?

42 A completed model rests level on two scales positioned apart. The forward scale reads and the rear scale reads . Where is the center of gravity measured aft of the forward scale?

43 A wattmeter connected between a loaded 3-cell battery and an electronic speed controller displays and . If the motor-controller combination is estimated to be efficient, which interpretation is valid?

44 A root airfoil template and a tip airfoil template are fixed at the correct incidence angles while shaping a tapered foam wing with a hot-wire bow. Which setup error most directly produces unintended aerodynamic twist despite both templates having the correct printed profiles?

45 During a thrust-stand test, increasing power causes the motor mount to rotate slightly, directing the propeller axis toward the stand's force sensor. If true thrust is , approximately what axial force should an ideal sensor register?

46 An optical tachometer gives stable readings of and for the same steadily running propeller when tested under fluorescent lighting. What is the most appropriate diagnostic action?

47 A two-blade propeller remains horizontal on a magnetic balancer, but whenever its hub is moved axially it consistently settles with the spinner-facing side downward. Which imbalance is most strongly indicated?

48 A laser cutter removes a kerf of . A rectangular tab must finish at wide, while its matching slot must finish at wide. Assuming the cut follows the drawn centerline, which drawn widths are required?

49 A servo tester shows that a control surface reaches its mechanical stop before the transmitter command reaches its endpoint. Which tool-assisted correction best preserves the servo and linkage?

50 A digital incidence meter is zeroed on the right wing root chord. At the right wing tip it reads . Assuming the meter orientation is unchanged and the structure is not flexing, what does the result indicate?

51 While using a razor plane on a tapered balsa leading edge, the blade begins lifting fibers and tearing chunks near one wingtip. What is the best immediate handling correction?

52 A builder must sand twelve stacked ribs to one airfoil shape without creating a hollow between the root and tip templates. Which technique provides the best geometric control?

53 A built-up wing is pinned flat while the lower spar is glued, but it develops wash-in after the upper sheeting is attached. Which handling practice would most effectively prevent this failure?

54 Two epoxy components require a ratio by volume, but the resin density is and the hardener density is . What resin-to-hardener mass ratio should be used when mixing on a scale?

55 A high-current connector develops a dull, irregular solder joint after the insulation has already begun to soften. Which revised soldering technique is most appropriate?

56 When shrinking heat-covering film on a lightly built wing, which sequence best minimizes warping?

57 A clean, accurately positioned hole is required through thin plywood without splintering its exit face. Which drill-press setup is most suitable?

58 Digital calipers repeatedly report a balsa sheet as thick, but the nominal thickness is and measurements increase when jaw pressure is reduced. What is the most likely cause and correction?

59 A modeler must cut a curved opening in thin balsa close to a finished structural member. Which hobby-knife method offers the greatest control with the lowest risk of splitting?

60 A covering iron's dial has no temperature scale, and a new film wrinkles at one setting but its adhesive fails to activate at a slightly lower setting. How should the tool be calibrated for reliable use?