Mathematics Past Paper PDF

MATHEMATICS 1. Select the fraction which is equal to 0.0250. a. ¼ 10. Solve the equation. b. 1/40 4- 3[-6(2+3) + 4] = c. 1/400...

MATHEMATICS 1. Select the fraction which is equal to 0.0250. a. ¼ 10. Solve the equation. b. 1/40 4- 3[-6(2+3) + 4] = c. 1/400 a. 82 2. The result of 7 raised to the third power plus the b. -25 square root of 39 is equal to c. -71 a. 349.24 11. An engine develops 108 horse power at 87 b. 34924 percent power. What horsepower would be c. 34324 developed at 65 percent power? 3. What is the speed ratio of an input gear with 36 a. 81 teeth meshed to a gear with 20 teeth? b. 70 a. 9:5 c. 61 b. 1:0.56. 12. A blueprint shows a hole of 0.171787 to be c. 1:1.8 drilled. Which fraction size drill bit is most 4. Express 7/8 as a percent. nearly equal? a. 8.75 percent a. 11/64 b. 875 percent b. 9/32 c. 87.5 percent c. 11/32 5. Which alternative answer is equal to 16,300? 13. What size of sheet metal is required to fabricate a. 1.63x10 to the fourth power. a cylinder 20 inches long and 8 inches in b. 1.63x10 to the negative third power diameter? (Note: C= pi x D) c. 163x10 to the negative second power. a. 20 inches x25-5/32 inches. 6. A four-cylinder aircraft engine has a cylinder b. 20 inches x24-9/64 inches. bore of 3.78 inches and is 8.5 inches deep. With c. 20 inches x25-9/64 inches. the piston on bottom center, the top of the piston 14. Select the fractional equivalent for a 0.0625 measures 4.0 inches from the bottom of the inches thick sheet of aluminum. cylinder. What is he approximate piston a. 1/16 displacement of this engine? b. 3/64 a. 200 cubic inches c. 1/32 b. 360 cubic inches 15. Maximum life for a certain part is 1100 hours. c. 235 cubic inches Recently, 15 of these parts were removed from 7. What is the ratio of 10 feet to 30 inches? different aircraft with an average life of 835.3 a. 4:1 hours. What percent of the maximum part life b. 1:3 has been achieved? c. 3:1 a. 75.9 percent 8. Solve the equation. b. 76.9 percent -6[-9(-8+4)-2(7+3)] = c. 75.0 percent a. -332 16. Which decimal is most nearly equal to a bend b. 216 radius of 31/64? c. -96 a. 0.2065 9. Solve the equation b. 0.4844 √2 31+ √2 43 = c. 0.3164 (17)2 a..0297 17. Find the square root of 1824 b..1680 a. 42.708x10 to the negative second power c..0419 b. 32708 c..42708x10 to the second power  c. 14.002 27. 1.21875 is equal to 18. Find the square root of 1746 a. 83/64 a. 41.7852 b. 19/16 b. 41.7752 c. 39/32 c. 40.7742 28. Find the value of 10 raised to the negative sixth 19. Which of the figure is using scientific notation? power. 1. 3.47x 104 = 34, 700 a. 0.000001 2. 2(4 10) 2,097,152 b. 0.000010 a. 1 c. 0.0001 b. 2 29. The total piston displacement of a specific c. Both 1 and 2 engine is 20. Find the square root of 3,722.1835 a. Dependent on the compression ratio. a. 61.00971 b. The volume displaced by all the pistons b. 61.00 during one revolution of the crankshaft. c. 61.0097 c. The total volume of all the cylinders. 21. A certain aircraft bolt has an overall length of 1- 30. How many gallons of fuel will be contained in a 1/2 inches, with a shank length of 1-3/16 inches, rectangular-shaped tank which measures 2 feet and a threaded portion length of 5/8 inch. What in width, 3 feet in length, and 1 foot 8 inches in s the grip length. depth? (7.5 gal =1 cu ft.) a. 0.5625 inch a. 66.6 b. 0.8750 inch b. 75 c. 0.3125 inch c. 45 22. Find the cube of 64. 31. What is the square root of 4 raised to the 5th a. 4 power? b. 192 a. 32 c. 262, 144 b. 64 23. A rectangular shaped fuel tank measures 27-1/2 c. 20 inches in length, ¾ foot in width, and 8-1/4 32. Convert the binary number 1111 to decimal form. inches in depth. How much gallons can fit in the a. 14 tank? (231 cu in = 1 gal) a. 7.366 b. 15 c. 16 b. 8.83 33. What is the ratio of a gasoline fuel load of 200 c. 170.156 gallons to one of 1680 pounds? 24. Solve the equation a. 5:7 ¿ ¿= b. 2:3 c. 5:42 a. 12 34. The parts department’s profit is 12 percent on a b. 60 new part. How much does the part cost if the c. 76 selling price is $145.60? 25. Sixty-five engines are what percent of 80 a. $128.13 engines? b. $125.60 a. 81 percent c. $130.00 b. 65 percent c. 52 percent 35. Solve the equation. 26. Solve the equation (64x3/8) ÷ ¾ = (−35+ 25 )(−7 )+ ( π ) (16)−2 a. 18 √ 25 b. 24 a. 174.85 c. 32 b. 68.037 36. What power of 10 is equal to 1,000,000,000? 43. Find the area of the triangle shown. a. 10 to the sixth power b. 10 to the tenth power c. 10 to the ninth power 3 7.5 37. Compute the area of trapezoid. 4 4 inches a. 12 square inches 2 inches b. 6 square inches c. 15 square inches 6 inches 44. What is the surface area of a cube where a side a. 24 square feet (edge) measures 7.25 inches? b. 48 square feet a. 381.078 cu. In. c. 10 square feet b. 315.375 sq. in. 38. If the volume of a cylinder with the piston at the c. 52.5625 sq. in. bottom center is 84 cubic inches and the piston 45. What is defined as a group of bits representing a displacement is 70 cubic inches, then the complete piece of information? compression ratio is a. Byte a. 7:1 b. Bit b. 1:2:1 c. Word c. 6:1 46. A rectangular-shaped fuel tank measures 60 39. An airplane flying a distance of 750 miles used inches in length, 30 inches in width and 12 60 gallons of gasoline. How any gallons will it inches in depth. How many cubic feet are within need to travel 2,500 miles? the tank? a. 31,250 a. 12.5 b. 9,375 b. 15.0 c. 200 c. 21.0 40. What is the piston displacement of a master 47. If an engine is turning 1,965 rpm at 65 percent cylinder with a 1.5 inches diameter bore and a power, what is its maximum rpm? piston stroke of 4 inches? a. 2653 a. 9.427 cubic inches b. 3023 b. 7.0686 cubic inches c. 3242 c. 6.1541cubic inches 48. What force is exerted on the piston in a 41. Determine the area of the triangle formed by hydraulic cylinder if the area of piston is 1.2 points A, B and C. A to B=7.5 inches A to D= square inches and the fluid pressure is 850 PSI? 16.8 inches a. 1,020 pounds B C b. 960 pounds c. 850 pounds 49. What is the speed of a spur gear with 42 teeth drive by a pinion gear with 14 teeth turning 420 A D RPM? a. 42 square inches a. 588 RPM b. 63 square inches b. 160 RPM c. 126 square inches c. 140 RPM 42. Find the square root of 124.924 50. A rectangular shaped fuel tank measures 37-1/2 a. 111.8x 10 to the third power inches in length, 14 inches in width and 8-1/4 b. 1118x10 to the negative second power inches in depth. How many cubic inches are c. 1,118x10 to the negative second power within the tank? a. 59.75  b. 433.125 59. The number 3.47x 10 to the negative fourth c. 4331.25 power is equal to 51. Which alternative answer is equal to 5.59? a..00347 1. ( √ 31 )+( √ 43)÷17 2 b. 34700 2. ¿ c..000347 3. ( √ 31+ √ 43 ¿−17 2 60. Solve the equation (−5+23 )(−2 ) + ( 3−3 ) ( √ 64 )= ¿ ¿ 52. Compute the area of the trapezoid −27 ÷ 9 9’ a. 11.9 b. 11.7 5’ c. 11.09 12’ 61. Select the decimal which is most nearly equal to a. 52.5 square feet 77/64 b. 60 square feet a. 0.08311 c. 76.5 square feet b. 0.8311 c. 1.2031 53. The radius of a piece of round stick is 7/32. 62. Solve the equation. Select the decimal which is most nearly equal to (32x 3/8) ÷ 1/6 = the diameter. a. 12 a. 0.2187 b. 2 b. 0.4375 c. 72 c. 0.3531 63. Solve the equation. 54. A pinion gear with 14 teeth is driving a spur ½ (-30+34)5 gear with 42 teeth at 140 RPM. Determine the a. 10 speed of the pinion gear. b. 95 a. 588 RPM c. 160 b. 420 RPM 64. Solve the equation. c. 126 RPM [(94 x -3) + (-9x2)] ÷ 2= 55. Select the container size that will be equal in a. -30 volume to 60 gallons of fuel. (7.5 gal = 1 cu ft) b. -150 a. 7.5 cubic ft c. -5 b. 8.0 cubic feet 65. Express 5/8 as a percent c. 8.5 cubic feet a. 625 percent 56. A 6-cylinder engine with bore of 3.5 inches, a b. 6.25 percent cylinder height of 7 inches and a stroke of 4.5 c. 62.5 percent inches will have total piston displacement of 66. Which of the following is the square root of (- a. 256.88 cubic inches 1776) ÷ (-2)-632? b. 259.77 cubic inches a. 128 c. 43.3 cubic inches b. 256 57. Solve the equation. c. 16 −4 √ 125 67. Solve the equation. =¿ −6 √ −36 (-3+2) (-12 – 4) +(-4+6) x3 a. +31.25 a. 20 b. -5.20 b. 22 c. -31.25 c. 28 58. What is the square root of 16 raised to the fourth 68. How much current does a 30-volt, 1/2 power? horsepower motor that is 85 percent efficient a. 1,024 draw from the bus? b. 4,096 (Note: 1 horsepower = 746 watts) c. 256 a. 14.6 amperes b. 12.4 amperes  c. 14.3 amperes 5. On a fillet weld, the penetration requirement includes what percentage(s) of the base metal thickness? a. 100 percent 69. Solve the equation. b. 25 – 50 percent -4+6+103 ( √ 1296 ) =¿ c. 60 – 80 percent a. 35,998 6. What is descriptive of the annealing process of b. 36002 steel during after it has been annealed? c. 62,208 a. Rapid cooling; high strength 70. An engine of 98 horse power maximum Is b. Slow cooling; low strength running at 75 percent power. What is the c. Slow cooling; increased resistance to wear horsepower being developed? 7. Which tool can be used to determine piston a. 87.00 pin out-of-round wear? b. 33.30 a. Telescopic gauge c. 73.50 b. Micrometer caliper MATERIALS AND PROCESSES c. Dial indicator 8. What non-destructive testing method 1. Which statement regarding aircraft bolts is requires little or no part preparation, is used correct? to detect surface or near-surface defects in a. When tightening castellated nuts on drilled most metals, and may also be used to bolts, if the cotter pin holes do not line up, it separate metals or alloys and their heat-treat is permissible to overtighten the nut to conditions? permit alignment of the next slot with the a. Eddy current inspection cotter pin hole b. Ultrasonic inspection b. In general, bolt grip lengths should equal c. Magnetic particle inspection the material thickness 9. Which of the following is a main c. Alloy steel bolts smaller than ¼ -inch determinant of the dwell time to use when diameter should not be used in primary conducting a dye fluorescent penetrant structure inspection? 2. What two types of indicating mediums are a. The size and shape of the available for magnetic particle inspection? discontinuities being looked for a. Iron and ferric oxides b. The size and shape of the part being b. Wet and dry process materials inspected c. High retentivity and low permeability c. The type and/or density of the part material material 3. What precision measuring tool is used for 10. In examining and evaluating a welded joint, measuring crankpin and main bearing journals a mechanic should be familiar with for out-of-round wear? a. Likely ambient exposure a. Dial gauge conditions and intended use of the b. Micrometer caliper part, along with type of weld and c. Depth gauge original part material composition 4. How many of these factors are considered b. The welding technique, filler essential knowledge for x-ray exposure? material, and temperature range used 1. Processing of the film c. The parts, proportions, and 2. Material thickness and density formation of a weld 3. Exposure distance and angle 11. Circular magnetization of a part can be used 4. Film characteristics to detect which defects? a. One a. Defects parallel to the long axis of the b. Three part c. Four b. Defects perpendicular to the long axis of the part  c. Defects perpendicular to the concentric c. Both dry and lightly oiled threads circles of magnetic force within the part 18. How is the locking feature of the fiber-type 12. (1) In non-destructive testing, a discontinuity locknut obtained? may be defined as an interruption in the normal a. By the use of an unthreaded fiber locking physical structure or configuration of a part insert (2) A discontinuity may or may not affect the b. By a fiber insert held firmly in place at the usefulness of a part base of the load carrying section Regarding the above statements, c. By making the threads in the fiber insert a. Only No.1 is true slightly smaller than those in the load b. Only No.2 is true carrying section c. Both No.1 and No.2 are true 19. When the specific torque value for nuts is not 13. Which statement relating to the residual given, where can the recommended torque value magnetizing inspection method is true? be found? a. Subsurface discontinuities are made readily a. AC 43. 13-1B apparent b. Technical Standard Order b. It is used in practically all circular and c. AC43. 13-2A longitudinal magnetizing procedures 20. If it is necessary to accurately measure the c. It may be used with steels which have diameter of a hole approximately ¼ inch in been heat treated for stressed diameter, the mechanic should use a applications a. Telescoping gauge and determine the 14. Which of the following defects are not size of the hole by taking a micrometer acceptable for metal lines? reading of the adjustable end of the 1. Cracked flare telescoping gauge 2. Seams b. 0 - to 1-inch inside micrometer and read the 3. Dents in the heel of a bend less than 20% of measurement directly from the micrometer the diameter c. Small-hole gauge and determine the size 4. Scratches/nicks on the inside of a bend less of the hole by taking a micrometer than 10% of wall thickness reading of the ball end of the gauge 5. Dents in straight section that are 20% of 21. In performing a dye penetrant inspection, the tube diameter developer a. 1,2,3,4 and 5 a. Seeps into a surface crack to indicate the b. 1,2 and 3 presence of a defect c. 1,2,3 and 5 b. Acts as a blotter to produce a visible 15. If dye penetrant inspection indications are not indication sharp and clear, the most cause is that part c. Thoroughly cleans the surface prior to a. Was not correctly degaussed before the inspection developer was applied 22. A bolt with an X inside a triangle on the head is b. Has no appreciable damage classified as an c. Was not thoroughly washed before the a. NAS standard aircraft bolt developer was applied b. NAS close tolerance bolt 16. Which heat-treating operation would be c. AN corrosion-resistant steel bolt performed when the surface of the metal is 23. Which heat-treating process of metal produces a changed chemically by introducing a high hard, wear-resistant surface over a strong, tough carbide or nitride content? core? a. Tempering a. Case hardening b. Normalizing b. Annealing c. Case hardening c. Tempering 17. Unless otherwise specified, torque values for 24. Alclad is a metal consisting of tightening aircraft nuts and bolts relate to a. Aluminum alloy surface layers and a a. Clean, dry threads pure aluminum core b. Clean, lightly oiled threads  b. Pure aluminum surface layers on an c. 2,3 aluminum alloy core 30. What method of magnetic particle c. A homogeneous mixture of pure inspection is used most often to inspect aluminum and aluminum alloy aircraft parts for invisible cracks and other 25. Which of the following occurs when a defects? mechanical force is repeatedly applied to most a. Residual metals at room temperature, such as rolling, b. Inductance hammering, or bending? c. Continuous 1. The metals become artificially aged. 31. What aluminum alloy designations indicate 2. The metals become stress corrosion cracked that the metal has received no hardening or 3. The metals become cold worked, strain or tempering treatment work hardened a. 3003-F a. 2 b. 5052-H36 b. 1 and 3 c. 6061-O c. 3. 32. What is steel tempered after being hardened 26. Unless otherwise specified or required, a. To increase its hardness and ductility aircraft bolts should be installed so that the b. To increase its strength and decrease its bolthead is internal stresses a. Upward, or in rearward direction c. To relieve its internal stresses and b. Upward, or in a forward direction reduce its brittleness c. Downward, or in a forward direction 33. Which condition indicates a part has cooled 27. (1) An aircraft part may be demagnetized by too quickly after being welded? subjecting it to a magnetizing force from a. Cracking adjacent to the weld alternating current that is gradually reduced b. Discoloration of the base metal in strength c. Gas pockets, porosity, and slag (2) An aircraft part may be demagnetized by inclusions subjecting it to a magnetizing force from 34. How is the locking feature of the fiber-type direct current that is alternately reversed in locknut obtained? direction and gradually reduced in strength a. By the use of an unthreaded fiber Regarding the above statements, locking insert a. Both No. 1 and No. 2 are true b. By a fiber insert held firmly in place at b. Only No.2 is true the base of the load carrying section c. Only No.1 is true c. By making the threads in the fiber insert 28. The society of Automotive Engineers (SAE) slightly smaller than those in the load and the American Iron and Steel Institute carrying section use a numerical index system to identify the 35. Which number represents the Vernier scale composition of various steels. In the number graduation of a micrometer? ‘4130’ designating chromium molybdenum a..00001 steel, the first digit indicates the b..001 a. Percentage of the basic element in the c..0001 alloy 36. One characteristics of a good weld is that no b. Percentage of carbon in the alloy in oxide should be formed on the base metal at hundredths of a percent a distance from the weld of more than c. Basic alloying element a. ½ inch 29. Which of the following describe the effects b. 1 inch of annealing steel and aluminum alloys? c. ¼ inch 1. Decrease in internal stress 37. Identify the correct statement 2. Softening of the metal a. An outside micrometer is limited to 3. Improved corrosion resistance measuring diameters a. 1,2 b. Tools used on certificated aircraft must b. 1,3 be an approved type  c. Dividers do not provide a reading 44. Aircraft bolts are usually manufactured with when used as measuring device a. Class 1 fit for the threads 38. Which material cannot be heat treated b. Class 2 fit for the threads repeatedly without harmful effects? c. Class 3 fit for the threads a. Unclad aluminum alloy in sheet form 45. The aluminum code number 1100 identifies b. 6061-T9 what type of aluminum c. Clad aluminum alloy a. Aluminum alloy containing 11 percent 39. Which of the following materials may be copper inspected using the magnetic particle b. Aluminum alloy containing zinc inspection method? c. 99 percent commercially pure 1. Magnesium alloys aluminum 2. Aluminum alloys 46. What tool is generally used to set a divider 3. Iron alloys to an exact dimension? 4. Copper alloys a. Machinist scale 5. Zinc alloys b. Surface gauge a. 1,2,3 c. Dial indicator b. 1,2,3,4 47. The core material of Alclad 2024-T4 is c. 3 a. Heat-treated aluminum alloy, and the 40. Generally speaking, bolt grip lengths should surface material is commercially pure be aluminum a. Equal to the thickness of the material b. Commercially pure aluminum, and the which is fastened together, plus surface material is heat-treated approximately one diameter aluminum alloy b. Equal to the thickness of the material c. Strain- hardened aluminum alloy, and which is fastened together the surface material is commercially c. One and one-half times the thickness of pure aluminum the material which is fastened together 48. The clearance between the piston rings and 41. Which statement regarding aircraft bolts is the ring lands is measured with a correct? a. Micrometer caliper a. When tightening castellated nuts on b. Thickness gauge drilled bolts, if the cotter pin holes do c. Depth gauge not line up, it is permissible to 49. How is a clevis bolt used with a fork-end overtighten the nut to permit alignment cable terminal secured? of the next slot with the cotter pin hole a. With a shear nut tightened to a snug b. In general, bolt grip lengths should fit, but with no strain imposed on the equal the material thickness fork and safe tied with a cotter pin c. Alloy steel bolts smaller than ¼-inch b. With a castle nut tightened until slight diameter should not be used in primary binding occurs between the fork and the structure fitting to which it is being attached 42. What is generally used in the construction c. With a shear nut and cotter pin or thin of aircraft engine firewalls? self-locking nut tightened enough to a. Stainless steel prevent rotation of the bolt in the fork b. Chrome-molybdenum alloy steel 50. To detect a minute crack using dye c. Titanium nickel alloy penetrant inspection usually requires 43. Why is it considered good practice to a. That the developer be applied to a flat normalize a part after welding? surface a. To relieve internal stresses developed b. A longer-than-normal penetrating within the base metal time b. To increase the hardness of the weld c. The surface to be highly polished c. To remove the surface scale formed 51. Magnetic particle inspection is used during welding primarily to detect  a. Distortion 58. When checking an item with the magnetic b. Deep surface flaws particle inspection method, circular and c. Flaws on or near the surface longitudinal magnetization should be used 52. A mechanic has completed a bonded to honeycomb repair using the potted a. Reveal all possible defects compound repair technique. What non- b. Evenly magnetize the entire part destructive testing method is used to c. Ensure uniform current flow determine the soundness of the repair after 59. A fiber-type, self-locking nut must never be the repair has cured? used on an aircraft if the bolt is a. Eddy current test a. Under shear loading b. Metallic ring test b. Under tension loading c. Ultrasonic test c. Subject to rotation 53. Why should an aircraft maintenance 60. Which type crack can be detected by technician be familiar with weld magnetic particle inspection using either nomenclature? circular or longitudinal magnetization a. So that accurate visual (pictorial) a. 45* comparisons can be made b. Longitudinal b. In order to gain familiarity with the c. Transverse welding technique, filler material and 61. A particular component is attached to the temperature range used aircraft structure by the use of an aircraft c. In order to compare welds with written bolt and a castle tension nut combination. If (non-pictorial) description standards the cotter pin hole does not align within the 54. Aircraft bolts with a cross or asterisk recommended torque range, the acceptable marked on the bolthead are practice is to a. Made of aluminum alloy a. Exceed the recommended torque range b. Close tolerance bolts by no more than 10 percent c. Standard steel bolts b. Tighten below the torque range 55. Select a characteristics of a good gas weld c. Change washers and try again a. The depth of penetration shall be 62. In magnetic particle inspection, a flaw that sufficient to ensure fusion of the filler is perpendicular to the magnetic field flux rod lines generally causes b. The height of the weld bead should be a. A large disruption in the magnetic 1/8 inch above the base metal field c. The weld should taper off smoothly b. A minimal disruption in the magnetic into the base metal field 56. What defects will be detected by c. No disruption in the magnetic field magnetizing a part using continuous 63. Which of the following methods may be longitudinal magnetization with a cable? suitable to use to detect cracks open to the a. Defects perpendicular to the axis of surface in aluminum forgings and castings? the part 1. Dye penetrant inspection b. Defects parallel to the long axis of the 2. Magnetic particle inspection part 3. Metallic ring (coin tap) inspection c. Defects parallel to the concentric circles 4. Eddy current inspection of magnetic force within the part 5. Ultrasonic inspection 57. Where is AN clevis bolt used in an 6. Visual inspection airplane? a. 1,4,5,6 a. For tension and shear load conditions b. 1,2,4,5,6 b. Where external tension loads are c. 1,2,3,4,5,6 applied 64. One way a part may be demagnetized after c. Only for shear load applications magnetic particle inspection is by  a. Subjecting the part to high voltage, low b. Intergranular amperage ac c. Fretting b. Slowly moving the part out of an ac 73. Liquid penetrant inspection methods may be magnetic field of sufficient strength used on which of the following? c. Slowly moving the part into an ac 1. Porous plastics magnetic field of sufficient strength 2. Ferrous metals 65. Which tool is used to find the center of a 3. Nonferrous metals shaft or other cylindrical work. 4. Smooth primer-sealed wood a. Combination set 5. Nonporous plastics b. Dial indicator a. 2,3,4 c. Micrometer caliper b. 1,2,3 66. A part which is being prepared for dye c. 2,3,5 penetrant inspection should be clean with 74. What tool is generally used to calibrate a a. A volatile petroleum-based solvent micrometer or check its accuracy? b. The penetrant developer a. Gauge block c. Water-base solvents only b. Dial indicator 67. Normalizing is a process of heat treating c. Machinist scale a. Aluminum alloys only 75. In the four-digit aluminum index system b. Iron-base metal only number 2024, the first digit indicates c. Both aluminum alloys and iron-base a. The major alloying element metals b. The number of major alloying elements 68. The testing medium that is generally used in used in the metal magnetic particle inspection utilizes a c. The percent of alloying metal added ferromagnetic material that has 76. The twist of a connecting rod is checked by a. High permeability and low retentivity installing push-fit arbors in both ends, b. Low permeability and high retentivity supported by parallel steel bars on a surface c. High permeability and high retentivity plate. Measurements are taken between the 69. Which tool can be used to measure the arbor and the parallel bar with a alignment of a rotor shaft or the plane of a. Dial gauge rotation of a disk? b. Height gauge a. Dial indicator c. Thickness gauge b. Shaft gauge 77. Which tool is used to measure the clearance c. Protractor between a surface plate and a relatively 70. A bolt with a single raised dash on the head narrow surface being checked for flatness? is classified as an a. Depth gauge a. AN corrosion-resistant steel bolt b. Thickness gauge b. NAS standard aircraft bolt c. Dial indicator c. NAS close tolerance bolt 78. Under magnetic particle inspection, a part 71. Select a characteristics of a good gas weld will be identified as having a fatigue crack a. The depth of penetration shall be under which condition? sufficient to ensure fusion off the filler a. The discontinuity pattern is straight rod b. The discontinuity is found in a non- b. The height of the weld bead should be stressed area of the part 1/8 inch above the base metal c. The discontinuity is found in a highly c. The weld should taper off smoothly stressed area of the part into the base metal 79. What may be used to check the stem on a 72. What type of corrosion may attack the grain poppet-type valve for stretch? boundaries of aluminum alloys when the a. Dial indicator heat treatment process has been improperly b. Micrometer accomplished? c. Telescoping gauge a. Concentration cell  80. Which of these nondestructive testing b. High temperature with low humidity methods is suitable for the inspection of c. High temperature with high humidity most metals, plastics and ceramics for 3. The desire effect of using winglets on an surface and sub-surface defects? aircraft’s wingtips is to a. Eddy current inspection a. Increase the lift to drag ratio b. Magnetic particle inspection b. B. reduce the aspect ratio c. Ultrasonic inspection c. Optimize wing dihedral and improve 81. What metal has special short-time heat lateral stability properties and is used in the construction of 4. Under which conditions will the rate of flow of a aircraft firewalls? liquid through a metering orifice (or jet) be the a. Stainless steel greatest (all other factors being equal)? b. Chrome molybdenum alloy steel a. Unmetered pressure,18 PSI; metered c. Titanium alloy pressure,17.5 PSI; atmospheric pressure 82. How can the dimensional inspection of a 14.5 PSI bearing in a rocker arm be accomplished? b. Unmetered pressure,23 PSI; metered a. Depth gauge and micrometer pressure, 12 PSI; atmospheric pressure b. Thickness gauge and push-fit arbor 14.3 PSI c. Telescopic gauge and micrometer c. Unmetered pressure, 17 PSI; metered 83. The reheating of het treated metal, such as pressure, 5 PSI; atmospheric with a welding torch pressure, 14.7 PSI a. Has little or no effect on a metal’s heat- 5. If a double acting actuating cylinder in a 3000-psi treated characteristics system has a piston with a surface rea of three- b. Has a cumulative enhancement effect square inches on the extension side, and a rod with on the original heat treatment a cross-section area of one square inch attached to c. Can significantly alter a metal’s the piston on the other side, approximately how properties in the reheated area much force will the actuator be able to produce 84. The pattern for an inclusion is a magnetic when retracting? particle build up forming a. 9,000 pounds a. A fernlike pattern b. 6,000 pounds b. A single line c. 3,000 pounds c. Parallel lines 6. Which of the following is newton’s first law of 85. Holes and a few projecting globules are motion, generally termed the law of inertia? found in a weld. What action should be a. To every action is an equal and opposite taken? reaction a. Reweld the defective portions b. Force is proportional to the product of b. Remove all the old weld, and Reweld mass and acceleration the joint c. Everybody persists in its state of rest, c. Grind the rough surface smooth, or of motion in a straight line, unless inspect, and Reweld all gaps/holes acted upon by some force. 7. Aspect ratio of a wing is defined as the ratio of the Basic physics a. Wingspan to the wing root b. Square of the chord to the wingspan 1. If the temperature of a confined liquid is held c. Wingspan to the mean chord constant and its pressure is tripled, the volume will 8. An engine that weighs 350 pounds is removed a. Triple from an aircraft by means of a mobile hoist. The b. Be reduced to one third its original engine is raised 3 feet above its attachment mount, volume and the entire assembly is then moved forward 12 c. Remain the same feet. Constant force of 70 pounds is required to 2. Which atmospheric conditions will cause the true move the loaded hoist. What is the total work input landing speed of an aircraft to be the greatest? required to move the hoist? a. Low temperature with low humidity a. 840 foot pounds  b. 1,890 foot pounds above the wing’s surface along with c. 1,050 foot pounds the downward deflection of air. 9. In physics, which of the following factors are c. Negative air pressure below the wing’s necessary to determine power? surface and positive air pressure above 1. Force exerted the wing’s surface along with the 2. Distance moved downward defection of air. 3. Time required 15. The purpose of aircraft wing dihedral is to a. 1 and 2 a. Increase lateral stability b. 2 and 3 b. Increase longitudinal stability c. 1,2 and 3 c. Increase lift coefficient of the wing a. The speed of sound in the 16. If both the volume and the absolute temperature atmosphere of a confined gas are doubled, the pressure will 10. The speed of sound in the atmosphere is most a. Not change affected by variations in which of the following? b. Be halved a. Sound frequency (cps) c. Become four times as great b. Ambient temperature 17. The boiling point of a given liquid varies c. Barometric pressure a. Directly with pressure 11. What is absolute humidity? b. Inversely with pressure a. The temperature to which humid air c. Directly with density must be cooled at constant pressure to 18. The temperature to which humid air must be become statured. cooled at constant pressure to become saturated b. The actual amount of the water vapor is called in a mixture of air and water. a. Dew point c. The ratio of the water vapor that is b. Absolute humidity actually present in the atmosphere to the c. Relative humidity amount that would be present if the air were saturated at the prevailing 19. The speed of sound in the atmosphere temperature and pressure. a. Varies according to the frequency of the 12. If all or a significant part of a stall strip is missing sound on an airplane wing, a likely result will be. b. Changes with a change in a. Asymmetrical lateral control at a temperature near stall angles of attack c. Changes with a change in pressure b. Decreased lift In the area of installation 20. The purpose of stall strips on airplane wings is to at high angles a. Increase lift in the areas of installation c. Asymmetrical lateral control at low b. Prevent stall in the areas of installation angles of attack. c. Ensure that the wing root areas stall 13. If the volume of a confined gas is doubled (without first the addition of more gas), the pressure will (assume 21. Which statement concerning heat and/or the temperature remains constant) temperature is true? a. Increase In direct proportion to the a. There is an inverse relationship between volume increase temperature and heat b. Remain the same b. Temperature is a measure of the c. Be reduced to one half its original kinetic energy of the molecules of any value substance 14. An airplane wing is designed to produce lift c. Temperature is a measure of the resulting from potential energy of the molecules of any a. A positive air pressure below and above substance the wing’s surface along with the 22. Which of the following is NOT considered a downward deflection of air method of heat transfer? b. Positive air pressure below the wing’s a. Convection surface and negative air pressure b. Conduction  c. Diffusion 23. A wing with very high aspect ratio (in comparison with low aspect ratio wing) will have. a. Increased drag at high angles of attack b. A low stall speed c. Poor control qualities at low airspeeds 24. How much work input is required to lower (not drop) a 120-pound weight from the top of a 3-foot table to the floor. a. 120 pounds of force b. 360 foot-pounds c. 40 foot-pounds 25. What force must be applied to roll a 120-pound barrel up an inclined plane 9 feet long to a height of 3 feet (disregard friction)? L÷I=R÷E L = length of ramp, measured along the slope I = height of ramp R = weight of object to be raised or lowered. E = Force required to raise or lower object a. 40 pounds b. 120 pounds c. 360 pounds 26. Which will weigh the least? a. 98 parts of dry air and 2 parts of water vapor b. 35 parts of dry air and 65 parts of water vapor c. 50 parts of dry air and 50 parts of water vapor 27. Which is the ratio of the water vapor actually present in the atmosphere to the amount that would be present if the air were saturated at the prevailing temperature and pressure a. Absolute humidity b. Relative humidity c. Dewpoint 28. If the fluid pressure is 800 psi in a ½ inch line supplying an actuating cylinder with a piston area of 10 square inches, the force exerted on the piston will be a. 4000 pounds b. 8000 pounds c. 800 pounds 29. Which condition is actual amount of water vapor in a mixture of air and water? a. Relative humidity b. Dewpoint c. Absolute humidity