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Auto and Shop Information Overview for ASVAB Power Practice Problems (page 2)

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  1. c.   Properly inflated tires, along with a tuned-up engine, will help to ensure you are getting the best gas mileage possible out of your vehicle.
  2. d.   A flow meter will measure the rate at which a fluid is flowing through the piping system.
  3. c.   An example of a flow meter would be a gas pump gauge. The pump gauge measures how much fuel is passing from the pump, through the nozzle, and into your tank.
  4. a.   The positive crankcase ventilation (PCV) system recirculates harmful emissions from the engine that would otherwise be vented out into the atmosphere.
  5. c.   Recycled oil can have any number of uses from refinement into lubricating oil, recycling into oil to be burned for energy consumption, or for use in smaller oilburning heaters. Discarding the used oil into the ecosystem via a wastewater drain will result in oil pollution of our waterways and our groundwater systems.
  6. a.   Fuel gauges will typically read in gallons or liters.
  7. c.   The automobile battery stores electricity and supplies power for a number of vehicle functions, including starting and ignition requirements. When the battery is drained of power, the alternator recharges the battery while the engine is running, in essence making electricity through rotary motion from a belt assembly powered by the engine.
  8. b.   The muffler is a component mounted midway between the engine and the exhaust where baffles and other sound-deadening materials are positioned to quiet and block the noise of the engine cylinder explosions and power cycles.
  9. d.   Leaf springs and coil compression springs are both suspension devices used to provide a smoother ride.
  10. b.   A hydrometer is an instrument used to measure the specific gravity (or relative density) of liquids. It examines the ratio of the density of the solution of antifreeze to the density of water.
  11. d.   Carbon monoxide (CO) results from the incomplete combustion of vehicle fuels. Gasoline engines emit a higher proportion of CO than diesel engines, due to the lower combustion temperature. Nitrogen oxides (NOx) are precursors for the formation of smog components such as ground-level ozone. Hydrocarbons contribute to the formation of tropospheric ozone and greenhouse gases.
  12. a.   Engines need a thin film of lubricant to ensure the various metal-on-metal contact points do not overheat or suffer excessive wear. The oil pump pushes oil through engine oil passages.
  13. c.   The transaxle combines a transmission, the differential, and associated components into one integrated assembly. Automobile configurations that have the engine at the same end of the car as the driven wheels (e.g., front-wheel drive/front-engine mounted or rear-wheel drive/rear-engine mounted) use a transaxle since space and mechanical restrictions make it difficult to mount a conventional drivetrain.
  14. c.   A hinge mortise is a recessed notch cut into a piece of wood so that a door hinge will fit flush within the mortise.
  15. d.   A lateral cut is not one of the six basic woodworking cuts. In addition to crosscut, rip, and miter, the remaining three are bevel crosscut, bevel rip, and bevel miter cuts.
  16. d.   A weld melts the two materials needing to be joined so when they cool they become one piece through the process of coalescence. A nail and screw merely join two pieces of wood together. A solder uses a fusible metal alloy that joins two pieces together but lacks the strength of a weld.
  17. c.   Hydration is the process by which the water reacts with the cement and bonds the other components together, eventually creating a stonelike material.
  18. a.   A float, sometimes called a bull float, is used to put a smooth final finish to floors. A screed is used to level the just-poured concrete. Tamping is a process whereby the materials in concrete are consolidated and it forces coarse aggregates below the surface. Forms are the temporary structure or mold for the support of concrete while it is setting and curing.
  19. d.   A split lock washer is designed to prevent nuts and bolts from backing out. A flat washer is used to distribute loads evenly through the connection. A fender washer is an oversize flat washer used to further distribute load, especially on soft materials. An ogee washer is typically used in dock and wood construction.
  20. c.   Steel is most often used to provide additional strength in concrete slabs and walls due to its high strength and relatively low cost.
  21. d.   Cement, sand, gravel, and water are the four primary ingredients in concrete.
  22. d.   Tile shingles are expensive but have a long life. Wooden "shake shingles" are also used as roofing material. The most common outer roofing material is asphalt shingles, since they are low in cost and provide good protection.
  23. c.   The hand tool depicted is a crescent wrench.
  24. d.   There is no tool known as a box hammer.
  25. c.   If a line is plumb, it is perfectly vertical.
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