CSLB General Building (B) Trade Practice Test
常见问题
这里有多少道 ASE Automobile (A1–A8) 练习题?+
一整套原创 ASE Automobile (A1–A8) 练习题,覆盖官方内容板块、按真实考试权重分布、附解析。免费,无需注册。
ASE Automobile (A1–A8) 考试是什么样的?+
大约 120 道题。先在这里按主题刷题,再做完整计时模考检验准备度。
这些是真实考题吗?+
不是。每道题都是 100% 原创,依据公开一手来源编写并附解析。我们从不抄袭真题或付费备考资料。
我可以用中文或西班牙语学吗?+
PrepPass 练习提供英文、中文、西班牙文。官方考试以英文进行 —— 你随时可以把题目语言切回英文,熟悉考试当天的确切术语。
样题与解析
以下是本题库中的部分真题与完整解析。完整题库请用上方的刷题工具。
- 1. Engine Repair (A1)
A cylinder head is warped beyond specification. Which service is normally required to restore a flat sealing surface?
- a.Replacing the head bolts only
- b.Installing a thicker head gasket
- c.Resurfacing (machining) the head
- d.Retorquing the head while hot
答案: c
解析: A warped head must be resurfaced by machining to bring the deck within flatness specification. A thicker gasket will not correct an uneven surface, and simply retorquing does not remove the warp. Excessive material removal, however, can raise compression and change valve timing on some engines.
- 2. Engine Repair (A1)
The main function of engine oil, besides lubrication, includes all of the following EXCEPT:
- a.Cooling internal components
- b.Generating spark for combustion
- c.Cleaning and suspending contaminants
- d.Sealing between rings and cylinder walls
答案: b
解析: Engine oil lubricates, cools, cleans, and helps seal the rings, but it plays no role in generating spark. Spark is produced by the ignition system. Detergent and dispersant additives keep contaminants suspended until the filter or an oil change removes them.
- 3. Transmission & Drivetrain (A2/A3)
Technician A says most dipstick-equipped automatics are checked with the engine running at operating temperature. Technician B says fluid level is unaffected by temperature. Who is correct?
- a.Both A and B
- b.Technician A only
- c.Technician B only
- d.Neither A nor B
答案: b
解析: Dipstick-equipped automatics are checked hot with the engine running and the selector cycled, and fluid expands with temperature so the reading depends on it. Technician B is wrong. Many modern units use a sealed fill within a specified fluid-temperature window.
- 4. Suspension & Steering (A4)
Cupping or scalloping tire wear is most commonly associated with:
- a.Worn suspension dampers or unbalanced wheels
- b.Excessive toe-in
- c.A slipping clutch
- d.Over-torqued lug nuts
答案: a
解析: Cupping, a series of dips around the tread, results from the tire bouncing due to worn shocks/struts or from imbalance. It usually comes with a noise that changes with speed. Correcting the damper or balance issue and rotating tires helps.
- 5. Brakes (A5)
Technician A says a pulsating brake pedal is usually caused by air in the hydraulic lines. Technician B says it is usually caused by rotor thickness variation or excessive lateral runout. Who is correct?
- a.Technician A only
- b.Technician B only
- c.Both A and B
- d.Neither A nor B
答案: b
解析: Thickness variation or warp causes the pads to move in and out as the disc turns, producing a pulsation felt in the pedal, while air produces a soft pedal instead. Technician B is correct. Measuring runout and thickness variation confirms it.
- 6. Brakes (A5)
A proportioning valve in the brake system is designed to:
- a.Reduce pressure to the rear brakes to prevent early lockup
- b.Increase pressure to the front only
- c.Store extra brake fluid
- d.Operate the parking brake
答案: a
解析: Because weight shifts forward during braking, the proportioning valve limits rear brake pressure to keep the rear wheels from locking prematurely. This maintains stability during hard stops. Many vehicles now handle this function electronically through ABS/EBD.
- 7. Electrical (A6)
Technician A says a fuse that blows again immediately after replacement indicates a short to ground or an overload. Technician B says repeatedly replacing the fuse will fix the circuit. Who is correct?
- a.Technician A only
- b.Both A and B
- c.Technician B only
- d.Neither A nor B
答案: a
解析: A fuse that blows again immediately is protecting the circuit from a short to ground or an overload drawing excess current. Technician B is wrong because the underlying fault, not the fuse, must be repaired. Inspect the wiring for chafing and test the component.
- 8. Heating & A/C (A7)
The expansion valve or orifice tube controls:
- a.Compressor speed
- b.Blower motor voltage
- c.The flow of refrigerant into the evaporator, causing a pressure drop
- d.Cabin air recirculation
答案: c
解析: The metering device drops the refrigerant pressure and controls flow into the evaporator, allowing it to boil and absorb heat. A restricted orifice or stuck valve causes poor cooling and abnormal pressures. It separates the high side from the low side of the system.
- 9. Engine Performance (A8)
Technician A says a rich air-fuel mixture can raise tailpipe CO and HC. Technician B says the oxygen sensor helps the PCM keep the mixture near stoichiometric. Who is correct?
- a.Technician A only
- b.Technician B only
- c.Both A and B
- d.Neither A nor B
答案: c
解析: A rich mixture leaves excess fuel that raises carbon monoxide and hydrocarbons, and the oxygen sensor feedback lets the PCM hold the mixture near the ideal ratio. Both technicians are correct. A lazy sensor degrades fuel control and emissions.
- 10. Engine Performance (A8)
The exhaust gas recirculation (EGR) system reduces which emission by lowering combustion temperature?
- a.Carbon monoxide (CO)
- b.Oxides of nitrogen (NOx)
- c.Hydrocarbons (HC)
- d.Carbon dioxide (CO2)
答案: b
解析: EGR routes inert exhaust gas back into the intake to lower peak combustion temperature, reducing the formation of NOx. A clogged EGR passage can cause knock and high NOx, while a stuck-open valve causes rough idle. Its operation is monitored by OBD-II.