Asvab Auto & Shop

Front 1

Auto & Shop Information – ASVAB (full) test 1: A technician is performing a cylinder leakage test on an engine. The technician sees air bubbles in the radiator with the cap off. Which one is the most likely cause? A. cracked cylinder head B. bad intake valve C. bad exhaust valve D. bad piston rings

Back 1

A. cracked cylinder headA. The high pressures developed in the combustion chamber can reach the coolant through the crack in the head and show up as air bubbles in the radiator as the coolant is circulated.

Front 2

Auto & Shop Information – ASVAB (full) test2: Looking at a brake system with the drum off, the secondary brake shoe location isA. the front shoe (closest to the front).B. the rear shoe (closest to the rear).C. not important.D. only required for disc/drum systems.

Back 2

B. the rear shoe (closest to the rear).B. The self–energizing effect of this type of brake system requires that the longer lined secondary shoe be in the rear part of that wheel's brake system.

Front 3

Auto & Shop Information – ASVAB (full) test3: If a thermostat in a vehicle's engine is stuck open, the engine willA. overheat.B. not heat up to a proper temperature.C. wind up with a blown head gasket.D. use too much antifreeze.

Back 3

B. not heat up to a proper temperature.B. The idea of a thermostat is to be in a closed position until a proper engine temperature is reached.

Front 4

Auto & Shop Information – ASVAB (full) test4: A relay is an electrical device thatA. uses high current to control low current.B. uses low current to control high current. C. steps up low voltage to a higher voltage.D. reduces current flow.

Back 4

B. uses low current to control high current. B. To control a higher current load with reduced length of large wiring, a relay is placed in the circuit.

Front 5

Auto & Shop Information – ASVAB (full) test5: Looking at the figure below, technician A says Figure A indicates an improperly installed brake lining, while technician B says Figure B indicates worn brake pads. Who is right?A. A onlyB. B onlyC. both A and BD. neither A or B

Back 5

B. B onlyB. The scraping metal clip is used to audibly indicate a worn brake pad condition to the driver.

Front 6

Auto & Shop Information – ASVAB (full) test6: A vehicle with front disc brakes and rear drum brakes has wheel cylinders onA. the front wheels only.B. all four wheels.C. the rear wheels only.D. one front wheel and one rear wheel.

Back 6

C. the rear wheels only.C. The front wheels have calipers that combine the function of a wheel cylinder and can also be an attaching component for the brake pads.

Front 7

Auto & Shop Information – ASVAB (full) test7: Which of the following components is not part of the secondary of an ignition system?A. spark plug wiresB. rotorC. distributor capD. pick–up coil

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D. pick–up coilD. The pick–up coil is part of the primary control circuit.

Front 8

Auto & Shop Information – ASVAB (full) test8: A distributor with vacuum advance compensates for varyingA. engine loads.B. engine speeds.C. altitudes.D. barometric pressures.

Back 8

A. engine loads.A. Because of the relationship between engine load (throttle position) and vacuum, some ignition systems use a vacuum advance retard unit to advance the spark proportionally to engine vacuum. This is a form of timing control.

Front 9

Auto & Shop Information – ASVAB (full) test9: In a computer–controlled ignition system, the ignition moduleA. changes ignition timing.B. controls the amount of secondary voltage.C. controls the magnetic pick–up.D. turns on and off the primary current.

Back 9

D. turns on and off the primary current.D. The ignition module turns on and off the primary current based on a signal it gets from the computer.

Front 10

Auto & Shop Information – ASVAB (full) test10: A starting system includes components such as the starter, motor, solenoid, and/or relay. What do these components have in common?A. They are mechanically controlled.B. They are parallel to each other.C. They use the principles of electromagnetism.D. They operate on A/C current.

Back 10

C. They use the principles of electromagnetism.C. All three components use an electromagnetic field to perform work. In the motor, the electromagnetic field is used to turn the armature. In the solenoid, it is used to move a plunger, and in the relay it is used to move a set of contacts.

Front 11

Auto & Shop Information – ASVAB (full) test11: In an automotive electrical series circuit, what will be the effect of adding an additional resistance?A. increase the current flowB. increase the voltageC. reduce the current flowD. does not affect current flow

Back 11

C. reduce the current flowC. A relationship exists between voltage, current flow, and resistance in a series circuit. If resistance is increased, current flow is reduced. If resistance is reduced, current flow will increase.

Front 12

Auto & Shop Information – ASVAB (full) test12: Which of the following requires an extractor for removal?A. pistonsB. bushingsC. broken boltsD. all of the above

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C. broken boltsC. Extractors are used on bolts and screws that are typically broken off flush or below the surface.

Front 13

Auto & Shop Information – ASVAB (full) test13: A tap is used toA. cut internal threads.B. cut external threads.C. center punch before drilling.D. detect vibration.

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A. cut internal threads.A. A tap is a hard tool used for cutting internal threads.

Front 14

Auto & Shop Information – ASVAB (full) test14: A veining bit is used with aA. hand drill.B. drill press.C. router.D. electric saw.

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C. router.C. A veining bit is used in a router to cut fine lines in material, often for decorative purposes.

Front 15

Auto & Shop Information – ASVAB (full) test15: To repair the corners of a picture frame, the best hardware to use would beA. finishing nails.B. corrugated fasteners.C. #10 screws.D. glue.

Back 15

B. corrugated fasteners.B. Corrugated fasteners (one is shown below) are probably best to use to repair split wood, since they draw the edges of the wood together. A #10 screw would be too big. Nails and glue don't really support the corners.

Front 16

Auto & Shop Information – ASVAB (full) test16: The illustration below is an example of aA. bevel joint.B. notch joint.C. lap joint.D. dovetail joint.

Back 16

D. dovetail joint.D. This is an example of a dovetail joint. It can be cut by hand or with a dovetail jig and an electric jigsaw.

Front 17

Auto & Shop Information – ASVAB (full) test17: A monkey wrench would usually be used by aA. plumber.B. carpenter.C. woodworker.D. auto–body repairperson.

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A. plumber.A. The large jaws and heavier weight of a monkey wrench are ideal for loosening and tightening large nuts and bolts that are usually encountered by plumbers. While it is possible for other workers to use a monkey wrench, the question uses the word ?usually,? suggesting that one type of person would be more likely than the others to use the wrench. Read the questions carefully for clues.

Front 18

Auto & Shop Information – ASVAB (full) test18: The illustration below is an example ofA. clamping.B. lapjoints.C. doweling.D. toenailing.

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D. toenailing.D. The use of toenailing lends greater strength and holding power to joints. It is used often in framing and other rough construction projects.

Front 19

19: A lathe is normally used to makeA. walls.B. cabinet doors.C. chair legs.D. a bookshelf.

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C. chair legs.C. A lathe is used for ?turning? and cutting grooves and other decorative lines in spindle legs for chairs and tables. It is also used for turning wooden bowls.

Front 20

20: The screwhead illustrated below is aA. dry wall screw.B. Phillips head screw.C. round head screw.D. flat head screw

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B. Phillips head screw.. The Phillips screw has a cross–shaped opening and is usually easier to start than a standard screw, since the screwdriver will be more secure in the grooves. You need a Phillips head screwdriver to insert these screws.

Front 21

21: To mix concrete, you should mixA. cement, stones, and sand.B. cement, water, gravel, and sand.C. cement and sand.D. cement, dirt, and water.

Back 21

B. cement, water, gravel, and sand.B. Concrete is a mixture of cement, sand, gravel, and water. If you are using premixed cement, you only need to add water.

Front 22

22: To use a bit in a hand drill,A. insert the lip into the flute.B. insert the auger into the base.C. insert the tang into the chuck.D. insert the spur into the chuck.

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C. insert the tang into the chuck.C. The tang is the end of the drill that is inserted into the chuck and tightened. The tang may be square for slower hand drills, and round for high–speed electric drills.

Front 23

23: What is a countersink?A. type of drillB. type of fileC. type of inlay materialD. type of bench plane

Back 23

A. type of drillA. A countersink is a bit with a cone–shaped cutting head, used to expand the top of a screw hole. This allows the head of the screw to lie flush with the material into which it is screwed.

Front 24

Auto & Shop Information – ASVAB (full) test24: A contour gauge measuresA. the length of an object.B. the width of an object.C. the diameter of an object.D. the size of an object.

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D. the size of an object.D. A contour gauge is used to measure and form an outline of an object. The gauge presses against the object, assumes its shape with dozens of little steel pins, and then is transferred to whatever you are cutting?wood, glass, metal, tile, and so on.

Front 25

25: To stop a board from chipping on the end as you plane, you can A. nail a piece of wood to the end of the board as an extension of the board. B. cut off the end after planing. C. Glue the chipped pieces back after finishing. D. Insert a nail into the end of the board to hold it together.

Back 25

A. nail a piece of wood to the end of the board as an extension of the board.A. If you nail an extension piece of wood to the end of the board you are cutting, the plane will continue along from one board to the next without chipping the end of the first board.

Front 26

Mathematics Knowledge – ASVAB (full) test1: If a = 5/2 then 1/a =A. 2B. 5C. 2/5D. 5/2

Back 26

C. 2/5C. Substitute 5/2 for a, giving you 1/a = 1/(5/2) = 1 x 2/5 = 2/5.

Front 27

Mathematics Knowledge – ASVAB (full) test2: 12 is 15% of what number?A. 0.0125B. 1.8C. 18D. 80

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D. 80D. Let n represent the number. If 12 is 15% of n, then 12 = 0.15n. Divide both sides by 0.15. Therefore, n = 80.

Front 28

Mathematics Knowledge – ASVAB (full) test3: Evaluate 3x + 7 when x = –3.A. –2B. 10C. 16D. 30

Back 28

A. –2A. Substitute –3 for x. Then 3(–3) + 7 = –9 + 7 = –2.

Front 29

Mathematics Knowledge – ASVAB (full) test4: Find the diagonal of a square whose area is 36.A. 6B. 6√2C. 9D. 9 √2

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B. 6√2B. The area of a square is s2 where s is a side of the square. If s2 = 36, then s = 6. The diagonal of a square forms two right triangles; d is the hypotenuse and the two legs are 6 units long. Using the Pythagorean theorem, d2 = 62 + 62 = 36 + 36 = 72. Therefore, d = √72 = 6√2.

Front 30

Mathematics Knowledge – ASVAB (full) test5: If a + b = 6, what is the value of 3a + 3b?A. 9B. 12C. 18D. 24

Back 30

C. 18C. 3a + 3b = 3(a + b). Since a + b = 6, 3a + 3b = 3(6) = 18.

Front 31

Mathematics Knowledge – ASVAB (full) test6: Find the length of the radius in the following figure.A. 3B. 4C. 5D. 10

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C. 5C. The hypotenuse of the triangle is the diameter of the circle. By the Pythagorean theorem, d2 = 62 + 82= 36 + 64 = 100. So d = √100 = 10 and the radius is 10/2=5.

Front 32

Mathematics Knowledge – ASVAB (full) test7: (3 – 1)×7 – 12 ÷ 2 =A. 1B. –2C. 4D. 8

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D. 8D. Following the correct order of operations produces: (3 – 1) × 7 – 12÷2 = 2 × 7 – (12÷2) = 14 – 6 = 8.

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Mathematics Knowledge – ASVAB (full) test8: The greatest common factor of 24 and 36 isA. 6B. 12C. 36D. 72

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B. 12B. Factors of 24 are 2 × 2 × 2 × 3. Factors of 36 are 2 × 2 × 3 × 3. The greatest common factor is 2 × 2 × 3 = 12.

Front 34

Mathematics Knowledge – ASVAB (full) test9: Solve for m: 3m – 12 = –6A. –6B. 0C. 2D. 6

Back 34

C. 2C. 3m – 12 + 12 = –6 + 12; 3m = 6; Dividing both sides by 3 results in m = 2.

Front 35

Mathematics Knowledge – ASVAB (full) test10: If 7p + 5q = –3, find q when p = 1.A. –1B. –2C. –1.142857143D. –0.285714286

Back 35

B. –2B. Substitute 1 for p and solve for q. 7(1) + 5q = –3 and 7 + 5q = –3. 7 + 5q – 7 = –3 – 7 and 5q = –10. Dividing both sides by 5 results in q = –2.

Front 36

Mathematics Knowledge – ASVAB (full) test11: The slope of the line shown isA. –2/5B. –5/2C. 2/5D. 5/2

Back 36

C. 2/5C. Slope is found by identifying two points on the line and finding the (change in y)/(change in x). The points (0, 0) and (5, 2) form the slope (2 – 0)/(5 – 0) = 2/5.

Front 37

Mathematics Knowledge – ASVAB (full) test12: Simplify (9x2y3z–12xy2z2)/3yzA. 3xy2z2 – 4xyzB. 3xy2z – 12xyzC. 3x2y2 – 4xyzD. 3y2 – 4xy2z2

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C. 3x2y2 – 4xyzC. (9x2y3z – 12xy2z2)/3yz = 9x2y3z/3yz – 12xy2z2/3yz = 3x2y2 – 4xyz

Front 38

Mathematics Knowledge – ASVAB (full) test13: The value of x isA. 70°B. 110°C. 140°D. 210°

Back 38

B. 110°B. The angle adjacent to the 140° angle is 40° since supplementary angles add to 180°. The angles of a triangle add to 180° so the angle adjacent to angle x is 180° – 70° – 40° = 70°. Angle x and 70° are supplementary, so x = 180° – 70° = 110°.

Front 39

Mathematics Knowledge – ASVAB (full) test14: In a standard deck of playing cards, a king of hearts is drawn and not replaced. What is the probability of drawing another king from the deck?A. 1/4B. 1/13C. 1/17D. 3/52

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C. 1/17C Probability is ?. Since one king was drawn and not replaced, three kings remain in the deck of 51 cards. So the probability of drawing another king is ?.

Front 40

Mathematics Knowledge – ASVAB (full) test15: How many minutes are there in 1 week?A. 10,080B. 1,440C. 420D. 168

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A. 10,080A. There are 60 minutes in 1 hour, 24 hours in 1 day, and 7 days in 1 week. So 1 week = ? = 7 × 24 × 60 = 10,080 minutes.

Front 41

Mathematics Knowledge – ASVAB (full) test16: If 2b+3=1/8, b=A. –6B. –3C. 0D. 2

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A. –6A. 1/8=1/23=2–3 so 2b+3=2–3 and b + 3 = –3. Therefore, b + 3 – 3 = –3 – 3 = –6.

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Mathematics Knowledge – ASVAB (full) test17: The angles of a triangle are in the ratio 3:4:5. What is the measure of the smallest angle?A. 15°B. 30°C. 45°D. 75°

Back 42

C. 45°C. Angles in a triangle add to 180°. So 3x + 4x + 5x = 180° and 12x = 180°. Dividing both sides by 12 results in x = 15°. The smallest angle is represented by 3x = 3(15°) = 45°.

Front 43

Mathematics Knowledge – ASVAB (full) test18: Subtract (2x3–3x+1)–(x2–3x–2)A. 2x3–x2+3B. 2x3–x2–6x–1C. x3–6x–1D. x2+3

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A. 2x3–x2+3A. Subtraction can be changed to addition by changing the signs in the entire term being subtracted. (2x3 –3x +1) – (x2–3x–2)=(2x3–3x+1) + (–x2+3x+2).. Combine like terms: 2x3–x2–3x+3x+1+2=2x3–x2+3.

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Mathematics Knowledge – ASVAB (full) test19: If the area of a square is 400, what is the length of its side?A. 20B. 40C. 100D. 200

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A. 20A. The area of a square is s2 where s is a side of the square. If s2 = 400, then s = √400 = 20.

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Mathematics Knowledge – ASVAB (full) test20: Seven more than 3 times a number is equal to 70. Find the number.A. 10B. 17C. 21D. 30

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C. 21C. Translate to a mathematical expression and solve. 3x + 7 = 70 so 3x + 7 – 7 = 70 – 7 and 3x = 63. Divide both sides by 3. Therefore, x = 21.

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Mathematics Knowledge – ASVAB (full) test21: Which expression represents the volume of a cylinder whose height is equivalent to the length of the radius?A. pr2B. pr3C. (pr)2D. (pr)3

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B. pr3B. The volume of a cylinder is given by the formula V = pr2h, where r is the radius of the circular base and h is the height. Since h = r, V = pr2r = pr3.

Front 47

Mathematics Knowledge – ASVAB (full) test22: How many distinct prime factors are there in 120?A. 2B. 3C. 4D. 5

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B. 3B. Prime factors of 120 are 2 × 2 × 2 × 3 × 5. Distinct factors are 2, 3, and 5. Therefore, there are three distinct prime factors.

Front 48

Mathematics Knowledge – ASVAB (full) test 23: What percent of 3/4 is 1/8? A. 9.38% B. 12% C. 16.67% D. 25%

Back 48

C. 16.67%C. Let p represent the unknown percent. p×3/4=1/8. Solve for p by multiplying both sides by the reciprocal of 3/4. p×3/4×4/3=1/8×4/3=4/24=1/6. As a percent, 1/6 is 16 2/3%.

Front 49

Mathematics Knowledge – ASVAB (full) test24: What is the area of the figure shown?A. 130 ft2B. 145 ft2C. 160 ft2D. 175 ft2

Back 49

B. 145 ft2B. Divide the figure into a rectangle and triangle as shown. The area of the figure equals the area of the rectangle plus the area of the triangle. The rectangle = length × width or 10 × 13 = 130 ft2; the triangle = ? base × height or ? ?. Together, the area is 130 + 15 = 145 ft2.

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Mathematics Knowledge – ASVAB (full) test25: If x is a positive integer, solve x2 + 6x = 16.A. 2B. 4C. 8D. 10

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A. 2A. Set the equation equal to 0 and factor. x2 + 6x – 16 = 0 and (x + 8)(x – 2) = 0. Then, either x + 8 = 0 or x – 2 = 0, so x = –8 or x = 2. Since x is positive, x = 2 only.