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Quiz Session - Attempts With Random Questions

ASE xEV (Level 2) Exam Questions

Page 7 of 10

121.

When should xEV technicians wear eye protection?

  • When exposed to electrical arc or electrical hazards

  • Never

  • Always

  • Only if objects could fly into the eyes

Correct answer: When exposed to electrical arc or electrical hazards

All technicians working around xEV should wear eye protection when exposed to electrical arc or electrical hazards. Side protection should also be used if there's a risk of flying objects. 

All eye protection must meet OSHA requirements. 

122.

Technician A says that all electrical systems of the xEV using memory will need to be retrained and initialized after turning the vehicle back on. Technician B says that nothing needs to be done. Which one is correct?

  • Technician A

  • Technician B

  • Neither

  • Both

Correct answer: Technician A 

Any electrical system using memory needs to be initialized and retrained after turning on the vehicle. This rule applies even to the power windows if memory is in use. Therefore, Technician A is correct.

Codes may also be set in the computer after turning back on the vehicle because the system was distrurbed. 

123.

How should the Manual Service Disconnect (MSD) be seated when reinstalled?

  • Firmly

  • Loosely

  • It doesn't need to be seated

  • It doesn't matter

Correct answer: Firmly

The Manual Service Disconnect (MSD) must be firmly seated when reinstalled. It should be installed according to Original Equipment Manufacturer (OEM) specs.

The Manual Service Disconnect (MSD) may only be removed and installed by a Level 2 or Level 3 technician. 

124.

When an open interlock is detected, an active discharge of the high-voltage bus takes how long to complete?

  • Less than one second

  • One second

  • More than five seconds

  • Five seconds

Correct answer: Less than one second

It takes less than one second for the high-voltage bus to discharge once the open interlock is detected. The open interlock circuit causes the high-voltage contactors in the battery to command open.

The interlock circuits are integrated into some of the high-voltage components. They work as a series circuit with multiple switches or connectors attached to a low-voltage power source. 

125.

What needs to be done if there's potential danger of injury to the eyes or face because of electric flashes or arcs?

  • Personal Protective Equipment (PPE) for eyes and face must be worn

  • Technician should shield eyes

  • Nothing

  • Two technicians should work together

Correct answer: Personal Protective Equipment (PPE) for eyes and face must be worn

OSHA regulates that Personal Protective Equipment (PPE) for the eyes and face should be worn if there's a potential danger of injury to the eyes because of electric flashes and arcs. All of the PPE must conform to OSHA standards.

The technician isn't able to shield their eyes enough to protect from injury. Having two technicians won't reduce the danger either. 

126.

What is the minimum current traveling across the heart that is lethal?

  • 75 mA

  • 16 mA

  • 25 mA

  • 100 mA

Correct answer: 75 mA

A current as low as 75 mA can be lethal when traveling across the heart. Not all electrocution travels across the body, especially if only one hand is being used. In this case, the current may pass down one side of the body instead of hand-to-hand.

This current level also produces extreme pain, possible respiratory distress, and severe muscular contractions. The victim won't be able to let go of the source. 

127.

Which of the following conditions is not a reason to contact a healthcare professional prior to working on electric vehicles?

  • Orthotic shoes

  • Hearing aids

  • Cardiac pacemaker

  • Insulin pump

Correct answer: Orthotic shoes

Some medical devices should be cleared by a professional before working around xEVs. Orthotic shoes are not one of the devices that need to be cleared. 

Technicians should always consult with a medical professional if they have an implanted debibrillator or cardiac pacemaker. It's also important to gain medical advice if using an internal analgesic medication pump, an insulin pump, hearing aids, or other medical devices. 

128.

What does a BEV eliminate the need for?

  • Fuel

  • Transmission

  • Exterior lighting

  • Suspension

Correct answer: Fuel

The Battery Electric Vehicle (BEV) doesn't need any fuel to run. Instead, it uses a battery pack and electric motor(s). A Plug-In Hybrid Electric Vehicle (PHEV) can also run on electric-only power, but it still contains a fuel tank as a backup source. 

The BEV still has a transmission, although it may only be a single-speed. These vehicles also have exterior lighting and suspension.

129.

What tool is used after repairs are made to verify the conductors and components are properly insulated and isolated?

  • Insulation tester

  • Digital multimeter

  • Conductive hand tools 

  • Insulated hand tools

Correct answer: Insulation tester

The insulation tester is used after repairs are made. It's needed to verify that the conductors and components are properly insulated and isolated before re-connecting power.

Insulation testers work by supplying a high-voltage signal to the component being tested. 

130.

Which of these is not a factor when determining the severity of shock a person receives?

  • Which direction the person was facing while shocked

  • Intensity, type, and frequency of the current

  • Path the current took through the body

  • Length of time the person was subject to the shock

Correct answer: Which direction the person was facing while shocked

There are three primary factors that determine the severity of the shock. The first factor is the intensity, type, and frequency of the current.

Secondly, the path the current takes through the body must also be considered. Finally, the length of time that the person was shocked can change the outcome. 

131.

Which EV technician is qualified to drive EVs?

  • All three levels

  • Level 1

  • Level 2

  • Level 3

Correct answer: All three levels

All three level technicians are qualified to operate EVs. The Level 1 technician is known as an electrically aware person, who has learned the risks of working around and with high-voltage systems. This technician can maintain and repair non-high-voltage components.

The Level 2 person is known as a high-voltage vehicle technician. This technician can isolate high-voltage systems and repair de-energized components. The Level 3 person is known as a high-voltage vehicle and battery technician. 

132.

What is the optimum temperature range for a high-voltage battery?

  • 77°F to 95°F

  • 82°F to 105°F

  • 67°F to 85°F

  • 55°F to 75°F

Correct answer: 77°F to 95°F

The optimum temperature range for high-voltage batteries is 77°F to 95°F. Most electric-propulsion vehicles contain integrated air- or liquid-cooling systems to keep the battery between these temperatures. 

Overcharging the batteries or damage, especially from an accident, can lead to overheating of the batteries and they could ignite. 

133.

If marks can't be found on a test instrument, who can be asked for certification?

  • Manufacturer

  • OSHA

  • Employer

  • LEVEL ONE technician

Correct answer: Manufacturer

If the certification can't be verified on the tool's body or found in the documents provided, technicians can inquire with the manufacturer. Technicians need proof of compliance with established safety standards. 

Typically, this information can be found on the meter body or through brochures and catalogs of the tool. 

134.

What is another name for the let-go range?

  • Freezing current

  • Release current

  • Stop current

  • Frozen current

Correct answer: Freezing current

The let-go range or freezing current is the point at which the person being shocked may no longer be able to let go of the source due to muscle contractions. Typically, this let-go range can start as low as 6 mA. 

At 5 mA, the person may receive a strong shock that is disturbing, but not too painful. Yet, at this point, the involuntary reactions can still lead to injuries. 

135.

What reduces the chance of the current passing through the heart during an electric shock?

  • Using only one hand

  • Standing on one foot

  • Working with eyes closed

  • Wearing safety glasses

Correct answer: Using only one hand

By using only one hand, there's less of a chance that the current will pass through the heart. In this case, the path is typically down one side of the body.

If the current passes through hand-to-hand, that's when fibrillation can occur. 

136.

What is the term used to describe compression-only CPR?

  • Hands-only CPR

  • Fast CPR

  • Traditional CPR

  • Medical CPR

Correct answer: Hands-only CPR

Hands-only CPR is done without mouth-to-mouth breathing. It may not be as effective, but is an alternative when helping someone in public or at work.

The chest compressions continue the same way as conventional CPR, but without the mouth-to-mouth breathing aspect occurring. 

137.

For adult victims, what is the chest compression to mouth-to-mouth breathing ratio during CPR?

  • 30:2

  • 22:2

  • 20:1

  • 10:1

Correct answer: 30:2

During CPR, use 30:2 compressions to breaths. The chest compressions should occur at a rate between 100 and 120 per minute.

These chest compressions should reach a depth of two inches. Yet, the depth should never increase beyond 2.4 inches. 

138.

What determines whether a technician should wear Category 2 PPE or Category 4 PPE?

  • High-voltage battery chemistry and energy potential

  • Time of day

  • Employer regulations

  • Number of battery cells used in the EV

Correct answer: High-voltage battery chemistry and energy potential

Based on NFPA regulations, technicians may need to wear Arc-Rated (AR) clothing. The rating of this clothing depends on the high-voltage battery chemistry and energy potential. 

PPE Category 2 covers a minimum arc rating of 8 cal/cm2 versus the PPE Category 4, which covers a minimum arc rating of 40 cal/cm2. 

139.

What should the length of the exposed test tips be to maintain a CAT III and CAT IV environment?

  • 4 mm

  • 2 mm

  • 6 mm

  • 8 mm

Correct answer: 4 mm

When working with electrified propulsion vehicles, the exposed test tip length should be 4mm. This measurement ensures a CAT III and CAT IV environment. 

To avoid accidentally touching metal to metal and causing a short circuit, technicians should use retractable probes, probes with short tips, or probe tip covers. 

140.

What is the name of the test performed to determine that all of the high voltage has been either isolated or discharged?

  • Live-dead-live test

  • Voltage measurement test

  • On-off test

  • Electrified volts test

Correct answer: Live-dead-live test

The Live-Dead-Live (LDL) test ensures that the sources of high voltage are either isolated or discharged. This test is performed with an appropriate meter by a skilled technician after all of the safety precautions have been followed and the Original Equipment Manufacturer (OEM) service instructions are completed. 

During this test, the technician must wear appropriate Personal Protective Equipment (PPE). 

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