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Quiz Session - Attempts With Random Questions

ASE G1 Exam Questions

Page 8 of 10

141.

A technician is performing a test drive on a vehicle equipped with a manual transmission and notices chatter upon clutch engagement. Which of the following would be the LEAST LIKELY cause of clutch chatter?

  • A damaged clutch pilot bearing

  • A leaking rear main seal on the engine

  • A leaking input shaft seal on the transmission

  • Driver misuse

Correct answer: A damaged clutch pilot bearing

The least likely cause for clutch chatter is a damaged pilot bearing. Damaged pilot bearings can cause the transmission input shaft and clutch disc to continue to turn after the clutch pedal is depressed and can cause difficulty shifting into first or reverse when the vehicle is stopped, but will not cause clutch chatter.

Any type of lubricant leaking on the clutch disc can change the coefficient of friction within the clutch system and cause chatter upon clutch engagement. This includes oil leaking from the engine rear main seal or lubricant leaking from a transmission input shaft seal. Driver misuse can cause rapid wear and overheating of clutch components, causing clutch chatter.

142.

Where should you apply grease during a drum brake service?

  • To the backing plate support pads

  • To the brake shoe rivets

  • To the wheel cylinder dust boot

  • To the brake shoe return springs

Correct answer: To the backing plate support pads

After cleaning the backing plate, a thin coat of water-resistant grease should be applied to the backing plate support pads before re-installing the shoes. Grease should also be applied to the adjuster screw threads and washer if the vehicle is so equipped..

143.

A technician is checking the transmission fluid level on a current model automobile. The transmission fluid should be at a specified temperature when checking the fluid level. What is the MOST LIKELY manufacturer-approved method of checking the transmission fluid temperature? 

  • Use a scan tool

  • Operate the vehicle for 15 minutes and look down the dipstick tube

  • Press the accelerator pedal till the engine is at maximum speed for one minute

  • Use the engine temperature gauge as an initial reference and check the transmission fluid within one minute of cold start

Correct answer: Use a scan tool 

If the transmission fluid on a new vehicle should be at a specified temperature when checking the fluid level, using a scan tool is the most accurate method. Pyrometers may also be used to measure the temperature of fluids and numerous other components.

Looking down the dipstick tube, operating the engine at maximum speed, and checking one minute from cold start is not a practice used by original equipment manufacturers.

144.

A customer states the transmission will allow the vehicle to move forward and in reverse, but will not upshift into a higher forward gear. Which of the following is the MOST LIKELY cause of a lack of transmission upshifts?

  • The transmission control module commanded a fail-safe mode

  • The driver did not press the brake pedal before shifting from the park position

  • It is a reminder for the customer to have the periodic maintenance completed for the transmission

  • A fault code is stored in the powertrain control module for a faulty oxygen sensor

Correct answer: The transmission control module commanded a fail-safe mode

Many of the possible faults detected by the transmission control module or the powertrain control module will place the transmission in a fail-safe mode. The purpose of a fail-safe mode is to prevent further damage to the transmission. A fail-safe mode often allows the operation of one forward gear and reverse. The operational forward gear is often second gear. Fail-safe mode, often called limp mode, will compel the driver to get the transmission fault serviced, but will allow the vehicle to be moved to a safe place.

Modern transmissions require the brake pedal to be depressed (pressed down) before shifting to drive or reverse. A lack of upshifts is not an indicator of required preventative maintenance. Many modern transmissions do not require preventative maintenance. An oxygen sensor fault will have very little effect on transmission operation and will not cause a transmission control module to command a fail-safe mode.

145.

Two technicians are discussing methods of testing the integrity of battery cables. Technician A says a digital multimeter should be used to measure the resistance of the cable. Technician B says a voltage drop test should be performed on the cables to determine if excessive resistance is present. Who is correct?

  • Technician B

  • Technician A

  • Both A and B

  • Neither A nor B

Correct answer: Technician B

Technician B is correct because voltage drop testing is a more accurate method of checking a circuit for excessive resistance. Since starter circuits carry more than 100 amps of current, a minute amount of resistance will adversely effect the operation of the circuit. Voltage drop testing is widely accepted in the automotive service industry as the best method of testing for excessive resistance in electrical connections or circuits.

Technician A is incorrect because resistance testing is a static measurement and is not as accurate as voltage drop testing. The circuit is not in operation and is disconnected while resistance testing is performed. 

146.

A technician is spraying a disinfecting deodorizer through the fresh air inlet to treat odors caused by microorganisms in the air conditioning system. Where is the fresh air inlet usually found?

  • Just below the windshield on the outside of the vehicle

  • Just below the windshield on the inside of the vehicle

  • Under the dash on the passenger's side

  • Near the steering column on the driver's side

Correct answer: Just below the windshield outside of the vehicle

The air conditioning fresh air inlet is usually located just below the windshield on the outside of the vehicle.

The recirculated air inlet for the HVAC system is usually located under the dash on the passenger's side. The defroster outlets will be located just below the windshield on the inside of the vehicle. The HVAC recirculated air inlet is not typically located near the steering column due to space limitations.

147.

A vehicle is equipped with a manual air conditioning system and the blower motor will only operate on the high setting. Which of the following would be the MOST LIKELY cause?

  • A faulty blower resistor assembly

  • A faulty fresh air inlet door

  • A faulty ground on the blower motor circuit

  • The refrigerant charge is low

Correct answer: A faulty blower resistor assembly

A faulty blower resistor assembly often causes an inoperative blower fan on the lower settings. Many vehicles are equipped with a blower resistor assembly that allows the blower to operate on four of five settings. The blower receives full battery voltage on the highest setting and is not affected by the resistors in the blower resistor assembly. The circuit for the low blower speeds includes one or more resistors to reduce the voltage available at the blower, thus slowing it down. When one or more resistors in the blower resistor assembly fails, the blower will not operate in one or more settings other than the highest speed.

A faulty ground on a blower circuit would affect all blower speeds. A fresh air inlet door will not have an effect on blower speed. Blower operation is not dependent on refrigerant charge.

148.

A Positive Crankcase Ventilation (PCV) valve is attached to the valve cover. When the engine is at idle, the hose leading to the PCV valve should:

  • Have vacuum applied to it

  • Have pressure applied to it

  • Have one or more cracks in it for ventilation

  • Be collapsed

Correct answer: Have vacuum applied to it

Vacuum should be present in the PCV hose. Lack of vacuum indicates a restricted hose, which can cause oil leaks. When the PCV hose is connected, vacuum should also be present in the PCV valve. The PCV hose should be inspected for cracks and signs of collapse.

149.

Technician A says transmission-related Diagnostic Trouble Codes (DTCs) can be retrieved by connecting a test light to pin 16 of the Data Link Connector (DLC). Technician B says a test drive is usually the best way to verify a customer's complaint about harsh upshifts. Who is correct?

  • Technician B

  • Technician A

  • Both A and B

  • Neither A nor B

Correct answer: Technician B

Technician B is correct. The first step of the diagnostic process is to verify the customer concern, and a test drive is usually the best way to do that. Technician A is incorrect because scan tools are connected to the DLC for retrieval of diagnostic codes.

150.

Two technicians are discussing Department of Transportation (DOT) 3 brake fluid. Technician A says unopened DOT 3 brake fluid expires within six months of packaging and should be disposed of properly. Technician B says DOT 3 brake fluid can quickly absorb water if exposed to the ambient air. Who is correct?

  • Technician B

  • Technician A

  • Both A and B

  • Neither A nor B

Correct answer: Technician B

Technician B is correct. Brake fluid is hygroscopic, meaning it can quickly absorb moisture when exposed to ambient air. As brake fluid absorbs moisture, its boiling point is reduced and braking performance diminishes.

Technician A is incorrect because brake fluid will last more than a year in an unopened container without absorbing enough moisture to affect performance. It is important to close a brake fluid container tightly after using it. 

151.

Two technicians are discussing vents on differentials. Technician A says a plugged differential vent can cause an axle seal leak. Technician B says if the vent is plugged, the brake components may be damaged. Who is correct?

  • Both A and B

  • Technician A

  • Technician B

  • Neither A nor B

Correct answer: Both A and B

Both technicians are correct. If the vent is plugged, internal pressure may increase, forcing lubricant past the axle oil seals. Leaking axle seals often allow differential lubricant to contaminate brake shoes. 

152.

What is the first step in the diagnostic process?

  • Verify the customer complaint by driving the vehicle or operating the system.

  • Verify the customer complaint by making necessary repairs.

  • Verify the customer complaint by checking technical service bulletins.

  • Verify the customer complaint by consulting the online repair help desk.

Correct answer: Verify the customer complaint by driving the vehicle or operating the system.

The first thing you should do before anything else is verify the customer complaint. After reading the work order and talking with the customer if necessary, drive the vehicle or operate the system to fully understand the complaint. After verifying the complaint, you can proceed with other diagnostic steps such as identifying related symptoms, reviewing TSBs, and consulting online repair information.

153.

Technician A says a cracked plastic valve cover should be repaired with an epoxy sealer or a plastic welder. Technician B says tightening cover bolts will usually permanently fix a leak. Who is correct?

  • Neither A nor B

  • Technician A

  • Technician B

  • Both A and B

Correct answer: Neither A nor B

Both technicians are incorrect. Cracked pans and covers should be replaced, not repaired. Tightening cover bolts may temporarily fix a leak, but in most cases, the gasket will ultimately need to be replaced.

154.

A technician is checking the charging system voltage on the vehicle. Which of the following would be the MOST LIKELY factory specification for charging system voltage?

  • 14.2 volts

  • 12.6 volts

  • 12.0 volts

  • 15.6 volts 

Correct answer: 14.2 volts

With the engine running, the charging system voltage should be approximately 14.2 volts. Anything below 13.1 volts or above 15.5 volts indicates a charging system malfunction. Specifications will vary by manufacturer. Always check the charging system circuits, including voltage drop testing, before replacing the generator (alternator).

155.

Two technicians are discussing the use of an on-car brake lathe. Technician A says using an on-car brake lathe to resurface rotors will eliminate excessive rotor runout caused by hub runout. Technician B says an on-car brake lathe will eliminate excessive brake drum runout caused by hub runout. Who is correct?

  • Technician A

  • Technician B

  • Both A and B

  • Neither A nor B

Correct answer: Technician A

Technician A is correct because on-car brake lathes allow a rotor to be resurfaced while attached to the hub. This process allows the brake rotor to have .001" or less runout, even if the hub has more. Off-car brake lathes do not allow for hub runout and newly resurfaced rotors often have excessive runout due to being installed on a hub with excessive runout.

Technician B is incorrect because brake drums cannot be resurfaced on an on-car brake lathe. 

156.

All of the following should be done after installing brake pads, EXCEPT:

  • Check the moisture level in the brake fluid

  • Listen for noises as you drive the vehicle

  • Perform a burnishing procedure

  • Check for appropriate brake pedal feel prior to moving the vehicle

Correct answer: Check the moisture level in the brake fluid

Checking the moisture level in the brake fluid is good practice, but should be done prior to brake service work.

Checking for appropriate brake pedal feel and listening for new or unusual noises should be done after all brake service work. Burnishing newly installed brake pads or brake shoes heats them up and conditions braking surfaces to avoid brake noises throughout the life of the newly-installed brake components. One procedure calls for 30 stops from a moderate speed with up to one minute between events to allow surfaces to cool down. 

157.

Which of the following would be the LEAST LIKELY to be included in the procedures for removing and installing a generator (alternator) on a late model automobile?

  • Remove the charging system fuse

  • Disconnect the negative cable from the battery

  • Remove the serpentine belt

  • Disconnect the wiring from the generator

Correct answer: Remove the charging system fuse

It would be unusual for a service publication to require the charging system fuse to be removed during the removal and installation of a generator because disconnecting the negative cable from the battery is usually one of the first steps in the process.

Disconnecting the negative battery cable disables the power distribution system and removing a fuse would be redundant. The serpentine belt must be removed and the wiring must be disconnected from the generator prior to removing the generator. 

158.

Two technicians are discussing the process of disarming a Supplemental Restraint System (SRS). Technician A says some SRSs are disabled by removing fuses. Technician B says all modern SRSs have a backup power supply. Who is correct?

  • Both A and B

  • Technician A

  • Technician B

  • Neither A nor B

Correct answer: Both A and B

Both technicians are correct. The SRS must be disabled before service. Generally, disabling the SRS requires either removing the SRS fuse(s) or disconnecting a connector specified by the manufacturer. SRSs have a backup power supply that requires a specific amount of time to pass between when the battery power is removed from the system and when the actual service can begin. The backup supply power is typically provided by capacitors in the SRS module. Original equipment manufacturer procedures must be followed exactly when testing or servicing SRSs.

159.

Two technicians are discussing hydraulic power steering service procedures. Technician A says you should turn the steering wheel until it stops and hold it in the fully locked position for two minutes to purge air from the power steering system. Technician B says a growling sound while turning indicates air is likely to be trapped in the power steering system. Who is correct?

  • Technician B

  • Technician A

  • Both A and B

  • Neither A nor B

Correct answer: Technician B

Technician B is correct. A growling sound from the power steering pump indicates air is trapped in the system. Excessive steering effort is another symptom related to air trapped in the power steering system.

Technician A is incorrect because holding the steering wheel in the fully turned or locked position can cause damage to the power steering pump in less than a minute. 

160.

Technician A says an incorrect thrust angle can only occur on front-wheel drive vehicles. Technician B says an incorrect thrust angle can be caused by a broken center bolt on a rear leaf spring. Who is correct?

  • Technician B

  • Technician A

  • Both A and B

  • Neither A nor B

Correct answer: Technician B

Technician B is correct because a broken center bolt on a leaf spring can cause the rear differential to shift and become misaligned. This misalignment will adversely affect the thrust angle.

Technician A is incorrect because any vehicle can receive damage to the rear suspension and cause the thrust angle to be incorrect.

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