Automotive Service Technician License Exam Questions and Answers
Canny College is dedicated to empowering individuals to excel in their auto mechanic trade through top-notch preparation courses for the Automotive Service Technician licensing exam. Our online course is comprehensive and designed to equip you with the skills, knowledge, and confidence needed to pass the demanding Red Seal Trade license exam and earn your Auto Mechanic Certificate of Qualification. We are your trusted pathway to success in the Canadian Red Seal Trades License Exams, a crucial milestone on your journey to a rewarding career in the skilled trades industry. Aspiring professionals seeking a Canadian Red Seal trade license can rely on our institution's expertise. Canny College offers comprehensive online exam preparation courses for various skilled trades. It uses an innovative learning approach and a commitment to excellence to equip students with the skills and expertise required to succeed in their chosen trades. Visit our website at www.cannycollege.com for more details. Please note that the practice questions provided here demonstrate the structure and phrasing of Red Seal examination questions. They are for study purposes only and do not result in certification or reflect actual performance on the examination.
Question 1: When repairing a twisted shielded wiring harness, which procedure should be followed?
A. Twist wires, tape, and then reshield the harness.
B. Twist wires, solder, and seal connections, then reshield the harness.
C. Repair using insulated crimp connectors, tape, and then reshield harness.
D. Straighten wires, solder, and seal connections, then reshield harness.
The correct answer is B. Twist wires, solder and seal connections, then reshield the harness, here is the explanation:
When repairing a twisted shielded wiring harness, the correct procedure to follow is: B. Twist wires, solder, and seal connections, then reshield the harness.
Twisting the wires together helps maintain the integrity of the shielded wiring harness. Soldering and sealing the connections ensures a secure and reliable electrical connection. Finally, reshielding the harness helps protect the wires from external interference.
This approach ensures that the repair is done effectively and that the shielded wiring harness maintains its protective properties.
Question 2: On a vehicle with a remote starter system, after a remote start, the engine continues to run when the brake is applied. What is the cause?
A. Defective ignition switch.
B. Faulty driver’s door switch.
C. Faulty hood pin switch.
D. Defective stop lamp switch.
The correct answer is D. Defective stop lamp switch, here is the explanation:
In a vehicle with a remote starter system, if the engine continues to run after a remote start when the brake is applied, the issue is likely caused by a defective stop lamp switch.
The stop lamp switch, also known as the brake light switch, is responsible for detecting when the brake pedal is pressed. When the brake pedal is applied, the switch sends a signal to the vehicle's control system to stop the engine running as a safety feature. If the stop lamp switch is defective or not functioning properly, the signal to stop the engine may not be received, leading to the engine continuing to run even when the brake is applied.
Therefore, the correct answer is D. Defective stop lamp switch, as this component plays a crucial role in the operation of the remote-start system and ensuring that the engine stops running when the brake pedal is pressed.
Question 3: When checking for leaks on an A/C system using dye, which test is used?
A. Vacuum.
B. Ultraviolet light.
C. Nitrogen.
D. Standing pressure.
The correct answer is B. Ultraviolet light, here is the explanation:
When checking for leaks in an A/C system using dye, a UV dye is added to the refrigerant in the system. If there is a leak, the dye will escape along with the refrigerant. To detect the presence of the dye and locate the source of the leak, an ultraviolet (UV) light is used. When the UV light is shined on the system, the dye fluoresces under the light, making it visible and helping technicians identify the location of the leak.
By using ultraviolet light in combination with UV dye, technicians can accurately pinpoint leaks in the A/C system, allowing for targeted repairs and preventing refrigerant loss.
Question 4: Excessive tire squeal occurs when turning at moderate speeds. All alignment adjustments are within specifications. What is the cause?
A. Underinflated tires.
B. Seized ball joints.
C. Overinflated tires.
D. Defective strut mounts.
The correct answer is A. Underinflated tires, here is the explanation:
Excessive tire squeal during turns at moderate speeds, when all alignment adjustments are within specifications, is often a symptom of underinflated tires. Underinflated tires can cause the tire to deform excessively during cornering, leading to tire squeal as the tire loses grip and slips on the road surface.
When tires are underinflated, the sidewalls flex more than they should, affecting the tire's contact patch with the road. This can result in reduced traction, especially during turns, and contribute to tire squeal. Ensuring that the tires are properly inflated to the manufacturer's recommended pressure levels can help prevent excessive tire deformation and reduce tire squeal during maneuvers.
Therefore, the correct answer is A. Underinflated tires, as this condition is a common cause of tire squeal during turns, particularly when all alignment parameters are within acceptable limits
Question 5: What is done before hoisting a vehicle with an air suspension?
A. Activate the air suspension system.
B. Disable the air suspension system.
C. Adjust ride height.
D. Disconnect height sensor.
The correct answer is B. Disable the air suspension system, here is the explanation:
Before hoisting a vehicle with an air suspension system, it is important to disable the air suspension system. This is because air suspension systems rely on pressurized air to support the vehicle's weight and maintain ride height. If the air suspension system is not disabled before lifting the vehicle, it can cause damage to the system components.
By disabling the air suspension system, you prevent the system from trying to adjust the ride height while the vehicle is lifted, which could lead to unnecessary stress on the system components. This precaution helps avoid potential damage to the air suspension system and ensures a safe and successful vehicle lift.
Therefore, the correct answer is B. Disable the air suspension system.
Question 6: After replacing a deployed driver’s airbag, the steering is stiff and noisy. What is done to correct the problem?
A. Replace the collapsed column.
B. Reprogram steering angle sensor.
C. Replace the clock spring.
D. Lubricate dry horn contacts.
The correct answer is A. Replace the collapsed column, here is the explanation:
In some cases, when an airbag deploys, it can cause damage to the steering column itself, leading to issues such as stiffness and noise in the steering system. If the steering column is compressed or collapsed as a result of the airbag deployment, it can affect the smooth operation of the steering wheel.
Replacing the collapsed steering column may be necessary to address the stiffness and noise in the steering system. By replacing the damaged steering column, you can restore proper functionality to the steering system and ensure the safe and smooth operation of the vehicle.
Therefore, if the correct solution in your case is to replace the collapsed column due to the issues with stiffness and noise in the steering after an airbag replacement, then the correct answer would be A. Replace the collapsed column.
Question 7: What is done after replacing a power steering hose?
A. Bleed the system using a pressure bleeder.
B. Bleed the system by turning the steering wheel from lock to lock.
C. Adjust the power steering belt and top up the reservoir.
D. Adjust the steering gear and reprogram the steering angle sensor.
The correct answer is B. Bleed the system by turning the steering wheel from lock to lock, here is the explanation:
After replacing a power steering hose, it is necessary to bleed the system to remove any air that may have entered the system during the replacement process. Bleeding the power steering system helps ensure proper operation and performance of the power steering system.
The correct answer "B. Bleed the system by turning the steering wheel from lock to lock" involves a process where you start the engine and turn the steering wheel fully from lock to lock several times. This helps to expel any air trapped in the system and ensures that the power steering system is properly filled with fluid and free of air pockets.
By bleeding the power steering system in this manner, you can prevent issues such as air bubbles affecting the performance of the power steering system and maintain optimal steering functionality.
Question 8: What is the first step to diagnose a flashing 4-wheel drive light?
A. Reprogram transfer case module.
B. Replace the encoder motor.
C. Scan test for DTC.
D. Perform transfer case service.
The correct answer is C. Scan test for DTC, here is the explanation:
The correct first step to diagnose a flashing 4-wheel drive light is C. Scan test for DTC (Diagnostic Trouble Codes).
When the 4-wheel drive light is flashing, it indicates that there is a fault or issue in the 4-wheel drive system. The first step in diagnosing the problem is to connect a diagnostic scan tool to the vehicle's onboard computer system to retrieve any stored Diagnostic Trouble Codes (DTC). These codes can provide valuable information about what specific issue is causing the 4-wheel drive light to flash.
By performing a scan test for DTC, technicians can quickly identify the source of the problem and determine the appropriate course of action for troubleshooting and repair. This initial diagnostic step is crucial in guiding the diagnostic process and ensuring an accurate and efficient diagnosis of the flashing 4-wheel drive light.
Question 9: A knocking engine noise is heard at idle and increases with rpm. Which component is worn?
A. Crankshaft main bearing.
B. Connecting rod bearing.
C. Crankshaft thrust bearing.
D. Camshaft bearing.
The correct answer is B. Connecting rod bearing, here is the explanation:
A knocking engine noise that is heard at idle and increases with RPM is often associated with a worn connecting rod bearing. The connecting rod bearing is a critical component that supports the connection between the connecting rod and the crankshaft in the engine. When the connecting rod bearing wears out or becomes damaged, it can result in excessive clearance between the connecting rod and the crankshaft, leading to a knocking noise as the engine runs.
This type of knocking noise is typically more pronounced at idle and increases in intensity with engine RPM as the components move and the wear becomes more apparent. It is essential to address a worn connecting rod bearing promptly to prevent further damage to the engine and ensure its continued smooth operation.
Question 10: An ABS-equipped vehicle has a brake pedal pulsation during a non-ABS stop. What is the cause?
A. Brake rotors below minimum thickness.
B. Primary circuit failure in the master cylinder.
C. Seized brake caliper.
D. Brake rotors with excessive run-out.
The correct answer is D. Brake rotors with excessive run-out, here is the explanation:
When an ABS-equipped vehicle experiences brake pedal pulsation during a non-ABS stop, the likely cause is brake rotors with excessive run-out. Run-out refers to the amount of lateral or radial movement (wobble) that a brake rotor may have as it rotates. Excessive run-out can lead to uneven contact between the brake pads and the rotor, causing a pulsation or vibration in the brake pedal when the brakes are applied.
This pulsation is often felt more prominently during non-ABS stops because the ABS may modulate brake pressure differently compared to a non-ABS stop. Therefore, if brake pedal pulsation is specifically occurring during non-ABS stops, the issue is likely due to brake rotors with excessive run-out, which can result in an uneven braking surface and the associated pulsation sensation.