Asvab Auto & Shop

Front 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

cracked cylinder head.
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

Looking at a brake system with the drum off, the secondary brake shoe location is

Back 2

the rear shoe (closest to the rear).
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

If a thermostat in a vehicle's engine is stuck open, the engine will

Back 3

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

Front 4

A relay is an electrical device that

Back 4

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

Front 5

A vehicle with front disc brakes and rear drum brakes has wheel cylinders on

Back 5

the rear wheels only.
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 6

Which of the following components is not part of the secondary of an ignition system?

Back 6

pick-up coil.
The pick-up coil is part of the primary control circuit.

Front 7

A distributor with vacuum advance compensates for varying

Back 7

engine loads.
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 8

In a computer-controlled ignition system, the ignition module

Back 8

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

Front 9

A starting system includes components such as the starter, motor, solenoid, and/or relay. What do these components have in common?

Back 9

They use the principles of electromagnetism.
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 10

In an automotive electrical series circuit, what will be the effect of adding an additional resistance?

Back 10

reduce the current flow
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 11

Which of the following requires an extractor for removal?
A. pistons
B. bushings
C. broken bolts
D. all of the above

Back 11

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

Front 12

A tap is used to

Back 12

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

Front 13

A veining bit is used with a

Back 13

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

Front 14

To repair the corners of a picture frame, the best hardware to use would be

Back 14

corrugated fasteners.
Corrugated fasteners 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 15

A monkey wrench would usually be used by a

Back 15

plumber.
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 16

A lathe is normally used to make

Back 16

chair legs.
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 17

To use a bit in a hand drill,

Back 17

insert the tang into the chuck.

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 18

What is a countersink?

Back 18

type of drill
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 19

A contour gauge measures

Back 19

the size of an object.

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 20

To stop a board from chipping on the end as you plane, you can

Back 20

nail a piece of wood to the end of the board as an extension of the board.
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.