Answer 10 free questions

ASE Entry-Level Truck: 10 free questions

Tap an answer to see if you're right and why, or switch to Timed and get scored at the end. Each answer is also under its question.

1. ASE Entry-Level Diesel Engines

   Which is the BEST source for the correct engine oil specification for a particular diesel engine?

   AThe brand name on the oil drum the shop stocks BThe color of the used oil in the pan CThe engine manufacturer's service information DThe oil level shown on the dipstick
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   Answer: C. The engine manufacturer's service information

   The engine manufacturer publishes the required oil viscosity and performance category for each engine in its service information. Using that specification protects the engine and any warranty. Shop habit or the look of the oil does not tell you what the engine requires.

   • A: Stock on the shelf does not mean it meets the engine's requirement.
   • B: Oil color shows contamination or heat, not the specification.
   • D: Dipstick shows quantity, not the type of oil required.
2. ASE Entry-Level Electrical/Electronic Systems

   What is the main benefit of reviewing a truck's service history before starting an electrical diagnosis?

   AIt replaces the need to verify the customer's complaint BIt shows repeated or related repairs that may point to the cause CIt lets the technician skip the wiring diagram DIt gives the exact test specifications for every circuit
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   Answer: B. It shows repeated or related repairs that may point to the cause

   Past repair orders can show a repeat failure, a prior repair that was done incorrectly, or a related fault. That narrows the diagnosis. History never replaces verifying the complaint or using the correct service information.

   • A: History does not replace verifying the complaint yourself.
   • C: Diagrams are still needed to trace circuits.
   • D: Specifications come from the manufacturer's service information, not the history.
3. ASE Entry-Level Brakes

   A technician is diagnosing a repeat brake complaint and wants to know whether the manufacturer has published a known fix. Which resource is the BEST place to look?

   AThe fuel tax records for the truck BThe driver's tire pressure log CThe cab's paint and trim code label DTechnical service bulletins for that model
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   Answer: D. Technical service bulletins for that model

   Technical service bulletins list known problems and updated repair procedures the manufacturer released after the truck was built. Checking them first can save time on a repeat complaint.

   • A: Fuel tax records say nothing about brake repairs.
   • B: Tire pressure records contain no brake repair information.
   • C: A paint code identifies appearance items only.
4. ASE Entry-Level Suspension & Steering

   Which source should a technician use to find the correct power steering fluid type for a specific truck?

   AThe label on any bottle of fluid on the shelf BThe manufacturer's service information for that vehicle CThe fluid color seen in the reservoir DThe fluid type used in the last truck serviced
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   Answer: B. The manufacturer's service information for that vehicle

   Fluid types differ between steering systems and the wrong one can damage seals and pumps. The vehicle manufacturer's service information lists the approved fluid for that truck.

   • A: A shelf bottle may not meet the specification for this system.
   • C: Color is not a reliable indicator of fluid type, and different fluids can look alike.
   • D: A different truck may use a different approved fluid.
5. ASE Entry-Level Inspection, Maintenance & Minor Repair

   A technician wants to know whether the manufacturer has published a known fix for a recurring problem on a specific engine. Which source should be checked?

   AThe fuel tank filler cap label BThe tire load and inflation placard CTechnical service bulletins (TSBs) DThe driver's pre-trip inspection form
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   Answer: C. Technical service bulletins (TSBs)

   Technical service bulletins are issued by the manufacturer to describe known problems and approved repairs. Checking them with the service history saves time and prevents repeating work.

   • A: It identifies the fuel type only.
   • B: The placard lists tire information, not engine repair updates.
   • D: It records the driver's findings, not manufacturer repair information.
6. ASE Entry-Level Diesel Engines

   A technician finds an engine wiring harness rubbing on a bracket edge with the insulation worn through. What is the correct action?

   ATighten the connector retainers BWrap tape over it and leave it routed there CLeave it if the engine runs normally DRepair the wires and reroute the harness
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   Answer: D. Repair the wires and reroute the harness

   Worn insulation can short or open a circuit. The wires must be repaired and the harness rerouted and secured so it no longer rubs.

   • A: Tightening connectors does not stop the rubbing.
   • B: Tape over a harness that keeps rubbing will wear through again.
   • C: Wear that exposes the wires will eventually cause a fault, even if the engine runs now.
7. ASE Entry-Level Electrical/Electronic Systems

   Two 12-volt batteries are connected in parallel, positive to positive and negative to negative. The system voltage is

   A24 volts, with the same capacity B24 volts, with increased capacity C6 volts, with increased capacity D12 volts, with increased capacity
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   Answer: D. 12 volts, with increased capacity

   A parallel connection keeps voltage the same and adds the batteries' capacities together. A series connection would add the voltages instead.

   • A: That describes a series connection, not a parallel one.
   • B: Voltage adds only in series, and capacity adds only in parallel.
   • C: Parallel never lowers voltage below a single battery's.
8. ASE Entry-Level Brakes

   Where should a technician look FIRST to find the correct brake fluid type for a hydraulic brake system?

   AWhatever brake fluid is already on the shop shelf BThe service information and the reservoir cap marking CA general parts store catalog for similar vehicles DThe fluid type used by the last shop that serviced it
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   Answer: B. The service information and the reservoir cap marking

   The manufacturer's service information specifies the fluid, and the reservoir cap is usually marked with the required DOT type. Guessing or using what was last used risks putting an incompatible fluid in the system.

   • A: Shelf convenience does not determine compatibility.
   • C: A catalog is not specific to this vehicle's requirements.
   • D: Prior service may have used the wrong fluid.
9. ASE Entry-Level Suspension & Steering

   What is the main job of a shock absorber on a truck suspension?

   ASupport the weight of the loaded truck frame BLimit the side-to-side movement of the axle on the springs CKeep the axle square to the frame rails DDampen spring oscillation after bumps
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   Answer: D. Dampen spring oscillation after bumps

   Springs store and release energy; a shock absorber converts that motion to heat in its fluid and so dampens it. Without it the axle would keep bouncing after each bump.

   • A: Springs carry the load, not shocks.
   • B: A track bar limits lateral axle movement.
   • C: Radius rods and torque arms keep the axle square to the frame.
10. ASE Entry-Level Inspection, Maintenance & Minor Repair

    Where should a technician look to find the correct drive axle lubricant type and capacity?

    AOn the color of the old fluid BIn the manufacturer's service information CIn the shop's bulk oil list DOn the tag of the previous repair
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    Answer: B. In the manufacturer's service information

    The manufacturer's service information gives the approved lubricant type, viscosity, and capacity. Using the wrong fluid can damage gears and bearings.

    • A: Fluid color does not identify the spec.
    • C: Shop stock does not show the correct spec.
    • D: A past repair may have used the wrong fluid.