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Quiz Session - Attempts With Random Questions

ASE xEV (Level 2) Exam Questions

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1.

What does the "AC" stand for in an AC motor?

  • Alternating current

  • Associated current

  • Amperage current

  • Alive current

Correct answer: Alternating current

AC stands for alternating current. The AC motor is known as a three-phase motor that's powered by 240 volts of alternating current. It can be either an induction motor or synchronous motor. 

Induction motors are more cost-effective and require less maintenance. These are used in several high-performance EVs, such as the Tesla Model 3. 

2.

Which of the following vehicles shares a lot of the same dashboard warning lights as a non-electrified vehicle?

  • HEV

  • BEV

  • Tesla

  • Electric truck

Correct answer: HEV

Hybrid Electric Vehicles (HEV) contain many of the same dashboard warning lights as a traditional vehicle. In addition to the warning lights found on an ICE (Internal Combustion Engine) vehicle, the hybrid may add a few others that are found on BEVs (Battery Electric Vehicles). This combination helps to bridge the gap between ICEs and BEVs.

The BEV doesn't have an ICE. Therefore, many of the same warning symbols are no longer needed. 

3.

What component manages the temperature of the electric motor?

  • Thermal cooling system

  • Onboard charger

  • DC/DC converter

  • Power electronics controller

Correct answer: Thermal cooling system

The thermal cooling system is responsible for managing the operating temperature of the electric motor. It also manages the temperature of the power electronics.

The onboard charger is necessary for AC charging, while the DC/DC converter transforms high-voltage power to low-voltage power. xEVs have a power electronics controller to monitor the speed and torque of the motor. 

4.

How do insulation testers measure high resistance values?

  • Applying a high-voltage signal

  • Reading voltages

  • Checking for power

  • Measuring arc flash

Correct answer: Applying a high-voltage signal

The insulation tester applies a high-voltage signal to measure high resistance levels. It can apply signals of 250 V to 1,000 V into the object that's being tested. 

Before using an insulation tester, the high-voltage components must be disconnected. 

5.

Who needs to be treated by a professional after an electrical shock?

  • Everybody

  • Those with burns

  • Anyone feeling dizzy

  • If they've hit their head

Correct answer: Everybody

Even a low-voltage shock can cause damage. Depending on the person's health, they could experience cardiac arrhythmias, kidney damage, and internal burns.

Even if a burn isn't present, the patient should receive medical care. Call 911 whenever an electrical shock has occurred. 

6.

Lithium-ion batteries are dry-cells containing what type of substance?

  • Electrolyte

  • Acid

  • Water

  • Sand

Correct answer: Electrolyte

The lithium-ion battery is known as a dry-cell battery. It contains electrolytes, most commonly a lithium salt solution, known as Lithium Hexafluorophosphate (LiPF6). 

These electrolytes are corrosive, flammable, and toxic. Contact with the electrolytes should never be made. 

7.

What is the name of the low-voltage battery in an xEV that supplies electricity to start the vehicle?

  • Auxiliary 

  • Traction

  • Solid state

  • Alkaline

Correct answer: Auxiliiary

The auxiliary battery is a low-voltage battery used in xEVs. It supplies electricity to start the vehicle and may power some accessories.

Auxiliary batteries aren't only in xEVs, but also in gas- or diesel-powered vehicles. 

8.

What systems must be de-energized when high-voltage components or cables are disconnected or removed?

  • High-voltage

  • Low-voltage

  • Zero voltage

  • Medium voltage

Correct answer: High-voltage

The high-voltage systems must be de-energized before any high-voltage cables and components are disconnected or removed. During non-high-voltage maintenance or repairs, the high-voltage systems may not need to be disabled or de-energized.

In addition to de-energizing the system, the parts must be verified safe before working on them. 

9.

What instructions do technicians need to follow when removing or installing an electric vehicle battery pack?

  • Original Equipment Manufacturer (OEM)

  • OSHA

  • Employer

  • Internet influencer

Correct answer: Original Equipment Manufacturer (OEM)

There are manual handling risks associated with replacing or disposing of heavy battery packs. For this reason, technicians should always follow the Original Equipment Manufacturer (OEM) instructions to reduce danger.

It's also important to follow all recommendations by OSHA, as well as the employer. These guidelines should be taught to technicians as part of the training. 

10.

Where should the keyless fob be located during maintenance or repair of xEVs?

  • Secured outside of detection range

  • In the vehicle

  • In the technician's pocket

  • On a workstation near the vehicle

Correct answer: Secured outside of detection range

The keyless fob must be secured outside of the detection range while working on xEVs. The key fob should be in a secured container, along with any high-voltage battery disconnects.

You don't want the key fob in the vehicle or a technician's pocket. It also shouldn't be located near the vehicle, where it could accidentally power the system. 

11.

Which of the following aspects will the insulated tools not protect against?

  • Temperatures reaching below -5°F

  • Electrical shock

  • Injury from electrical arcing

  • Damage to equipment being repaired or inspected

Correct answer: Temperatures reaching below -5°F

Insulated hand tools only need to be rated for temperatures down to -4°F. These hand tools do protect the technician against electrical shock and arcing.

They also protect the equipment that's being inspected or repaired from damage.

12.

What do the Level 2 and Level 3 technicians need to do before working on a high-voltage vehicle?

  • Notify someone else that's trained

  • Remove all fuses and relays

  • Sweep up the area

  • Take a break

Correct answer: Notify someone else that's trained

It's important for the technician to notify someone else that's trained on high-voltage safety procedures before starting a job. This applies to both the Level 2 and Level 3 technicians. 

Technicians are never to work alone on a high-voltage vehicle. 

13.

What does the first digit of the Ingress Protection (IP) rating mean?

  • Size of excluded objects

  • Score received from independent testing

  • Cost

  • Year it was made

Correct answer: Size of excluded objects

The IP rating contains two digits. The first digit shows the size of excluded objects. 

A rating of zero indicates that there's no protection against dust. A rating of six indicates that it is dustproof. 

14.

How safe is "live work"?

  • Not safe at all 

  • Safe under the right conditions

  • Completely safe

  • Should never be done

Correct answer: Not safe at all

Level 3 technicians perform "live work". This work is not considered electrically safe.

For this reason, it's even more important to follow all the recommended guidelines, especially when working around high-voltage systems. 

15.

Which of the following won't be required when conducting high-voltage battery service?

  • Retrieval hook

  • Lifting equipment

  • Special equipment for make/model

  • Original Equipment Manufacturer (OEM) instructions

Correct answer: Retrieval hook

The retrieval hook is a handy safety tool provided by some employers. It's to be used when electric shock occurs and the power source can't be disconnected.

Required items may include lifting equipment that facilitates the battery pack removal. Technicians also need any special equipment designed for that particular make and model. This information is all supplied by the Original Equipment Manufacturer (OEM). 

16.

What voltage is considered dangerous based on OSHA regulations?

  • 50 volts or above

  • 25 volts or above

  • 100 volts or above

  • 5 volts or above

Correct answer: 50 volts or above 

OSHA defines any voltage of 50 or above as dangerous. This guideline applies to both AC and DC voltage. 

Electric current and resistance are the factors determining injury when passing through the body. It's not based on voltage. 

17.

What causes the heart to stop during an electric shock?

  • Muscle contractions

  • Burns

  • Respiratory distress

  • Pain

Correct answer: Muscle contractions

The electric shock creates muscle contractions within the body. The heart is a muscle and it can contract to the point that it stops beating. 

If this occurs, cardiac arrest occurs. CPR (Cardiopulmonary Resuscitation) can help to keep the blood flowing in the shocked patient until medical help arrives. 

18.

What type of energy releases high voltage ranging from 100 V DC to 800 V DC?

  • Stranded

  • Trapped

  • Contained

  • Dispersed

Correct answer: Stranded

Stranded energy can release high-voltage energy from 100 V DC to 800 V DC, depending on the battery condition. This stored energy in the battery or capacitors can be released after damage or an accident.

When the stranded energy is released, you may hear popping, sizzling, or see sparks. 911 should always be called if stranded energy is a possibility. 

19.

When should face shields be cleaned?

  • After each use

  • Before each use

  • Never

  • Once a week

Correct answer: After each use

Face shields should be cleaned immediately after each use. They must also be stored properly to prevent damage and contamination.

Face shields are worn to protect the technician's eyes from flash over or arc flash while working on energized components. 

20.

What does Lockout/Tagout (LOTO) prevent?

  • Re-energizing the work environment

  • Theft

  • Getting parts confused

  • It's not meant for protection

Correct answer: Re-energizing the work environment

When Lockout/Tagout (LOTO) is used correctly, it prevents the work environment from being accidentally re-energized. Someone could re-install a part not knowing that the system is being worked on, thereby putting the technician and others at risk for electric shock.

Lockout is used when the environment is uncontrolled, while tagout can be used in controlled environments. 

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