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Quiz Session - Attempts With Random Questions

ASE xEV (Level 2) Exam Questions

Page 10 of 10

181.

What does a higher voltage rating on a meter mean?

  • Higher transient-withstand rating

  • Lower transient-withstand rating

  • Zero transient-withstand rating

  • Higher voltage rating has nothing to do with transient-withstand rating

Correct answer: Higher transient-withstand rating

The higher the voltage rating is on a meter, the higher the transient-withstand rating is. The input circuitry of the meter is meant to withstand better voltage transients without harming the individual using it.

Technicians want a meter that is meant to withstand the average voltage levels, spikes, and transients that would lead to an arc flash or shock. 

182.

What other people are permitted to be with the technician while working on high-voltage systems?

  • Trained people

  • Customers

  • Non-trained people

  • No one

Correct answer: Trained people

As a technician, you are responsible for your work environment. It's vital to keep untrained people out of the work area. This applies to customers as well.

Only other trained people should be permitted in the work area. It's best to work with someone else, to ensure safety measures are followed. 

183.

What is the difference between a HEV and BEV?

  • Powertrain

  • Number of wheels

  • Shape/size

  • Durability

Correct answer: Powertrain

The Hybrid Electric Vehicle (HEV) has an internal combustion engine, battery pack, and electric motor(s). The Battery Electric Vehicle (BEV) doesn't have an internal combustion engine, but only contains a battery pack and electric motor(s). 

The amount of wheels, shape/size, and durability aren't affected by whether the vehicle is an HEV or BEV. 

184.

What is the internal resistance of the human body?

  • 300 to 1,000 ohms

  • 100 to 500 ohms

  • 200 to 750 ohms

  • 500 to 2,000 ohms

Correct answer: 300 to 1,000 ohms

On average, the internal resistance of the human body is between 300 and 1,000 ohms. The majority of this resistance is in the skin, which is a poor conductor. 

Dry skin can increase the resistance, which is why it's more dangerous as the victim gets burnt from electrocution. 

185.

How many hands should touch a lead, the ground, or the vehicle when working with live circuits?

  • One

  • Zero

  • Two

  • It doesn't matter

Correct answer: One

Only one single hand should touch the lead, the ground, or the vehicle when working with live circuits. This simple step ensures that the technician doesn't become a circuit and have electricity running through their body if isolation gets lost.

The one hand rule must be followed no matter how much Personal Protective Equipment (PPE) is being worn. 

186.

How are the interlock circuits used when the high-voltage system is successfully de-energized?

  • They aren't needed

  • To reduce current

  • To protect technicians

  • As a backup

Correct answer: They aren't needed

Interlock circuits are designed to provide an additional layer of safety when working on high-voltage systems. They are for those that haven't followed the de-energizing procedures by the Original Equipment Manufacturer (OEM). 

When the high-voltage system is de-energized properly, the interlock circuits aren't needed. 

187.

What should you do if the high-voltage battery causes a fire?

  • Evacuate the area immediately

  • Try to put it out

  • Call others over to help

  • Move other vehicles to safety

Correct answer: Evacuate the area immediately

Even if the fire looks controlled, if it was caused by a high-voltage battery, you should evacuate the area immediately. Because of the stranded energy in the battery, an explosion could occur.

Once everyone is safe, it's important to call 911. First responders have the equipment to put out battery fires. 

188.

Technician A says that a CAT III 600 V rated meter provides superior protection to the CAT III 1000 V rated meter. Technician B says that the CAT III 1000 V rated meter provides superior protection to the CAT III 600V rated meter. Which technician is correct?

  • Technician B

  • Technician A

  • Both

  • Neither

Correct answer: Technician B

The CAT III 1000 V meter has better protection than the CAT III 600 V meter. The voltage rating of the first exceeds the second, proving it has better protection.

Along with comparing voltages, it's also vital to look at the CAT rating when comparing which one is safest. With these two meters, the CAT rating is the same. 

189.

Which of the following systems may contain electrical energy after the systems are de-energerized?

  • High-voltage battery

  • Capacitors

  • High-voltage cables

  • Braking system

Correct answer: High-voltage battery

The high-voltage battery will remain charged even after de-energizing the system. While it remains a potential current source, it will be isolated from the rest of the system, making it safe to work on other components.

The other components in the EV should remain de-energized. The exception could be with the motor-generator, if it is a permanent magnet motor, because these types transfer mechanical energy into electrical energy without external current sources.

190.

To what level will insulated hand tools protect technicians?

  • 1,000 V AC and 1,500 V DC 

  • 2,000 V AC and 2,500 V DC

  • 500 V AC and 1,000 V DC

  • 250 V AC and 750 V DC

Correct answer: 1,000 V AC and 1,500 V DC 

Insulated hand tools are made to protect technicians from electrical shock up to 1,000 V AC and 1,500 V DC. All insulated hand tools must be inspected before work to ensure safety.

Both Level 2 and Level 3 technicians may use insulated hand tools when working around xEVs. 

191.

When do insulated tools need to be inspected?

  • Before every use

  • After every use

  • Once a week

  • Never

Correct answer: Before every use

Insulated tools must be inspected before using them. If there's any damage to the tool, it should not be used.

Insulated tools protect technicians from electrical shock up to 1,000 V AC and 1,500 V DC, but can only do so if the tool is deemed safe.

192.

What is the term used to describe the bomb-like blast that occurs from the thermal energy release during an arc flash?

  • Arc blast

  • Arc light

  • Arc bomb

  • Arc explosion

Correct answer: Arc blast

Arc blast is the term that describes the bomb-like blast occurring from the thermal energy release from an arc flash. During an arc blast, the heat at either end of the arc can hit temperatures of 35,000°F. 

The metal from the vapored conductors can be expelled at speeds greater than 740 mph. At the same time, intense heat is emitted and other hazards include shrapnel, toxic smoke, blinding light, and molten metal. 

193.

Which of the following situations creates more danger to a technician during high-voltage transient?

  • Being closer to the power source

  • Being further from the power source

  • Wearing Personal Protective Equipment (PPE)

  • Working in a well-lit environment

Correct answer: Being closer to the power source

Based on the three-category rating system, the closer the technician is to the power source, the higher the danger of high-voltage transient is. The closer the person stands, the higher the event rises on the danger scale. 

The available fault current in these circuits can reach up to 100,000 amps. Even if the current is less in an xEV, the situation is dangerous. 

194.

Along with removing anything conductive before working on xEVs, what else must be done?

  • Put on Appropriate Personal Protective Equipment (PPE)

  • Check in with supervisor

  • Drive the EV around the block

  • Put up conductive barriers to secure the work area

Correct answer: Put on Appropriate Personal Protective Equipment (PPE)

Appropriate Personal Protective Equipment (PPE) should always be put on before working on xEVs. This should be done in conjunction with removing conductive personal items before repair or maintenance. 

It's also vital to follow all the guidelines set by the Original Equipment Manufacturer (OEM). 

195.

What must be done right after de-energizing the system?

  • Ensure the system can't be reactivated

  • Maintenance or repair work as needed

  • Drive the EV to the bay

  • Have supervisor approve

Correct answer: Ensure the system can't be reactivated

The first step is to de-energize according to the Original Equipment Manufacturer (OEM) instructions. After that, you are required to confirm that the system can't be reactivated.

If the high-voltage system reactivates while working on it, there's a danger of electric shock. 

196.

What does the Ready to Drive dashboard symbol look like?

  • Car with double arrow underneath

  • Letters "RG"

  • Thumbs up

  • Sign that says "GO"

Correct answer: Car with double arrow underneath

The Ready to Drive light shows a car and a double arrow below it. This light is green and is one that doesn't alert to any danger.

When the hybrid or EV is ready to drive, this light comes on. It helps to determine if the vehicle is running, since it can be nearly silent. 

197.

What is another danger associated with electrical shock during the let-go range (6–16 mA)?

  • Falls

  • Respiratory distress

  • Nerve damage

  • Cardiac arrest

Correct answer: Falls

When a person is shocked at 6 mA or higher, it's considered part of the let-go range. The person may not be able to let go of the source due to severe muscle contractions.

At the same time, they are at risk of falling because of the lack of control. When they are broken free from the source, the individual could fall, leading to even more injuries. 

198.

Which of following components is the Level 2 technician allowed to touch while the Level 1 technician is not?

  • Manual Service Disconnect (MSD)

  • Gas engine

  • Stereo system wiring

  • High-voltage battery

Correct answer: Manual Service Disconnect (MSD)

The Level 2 technician is permitted to touch the Manual Service Disconnect (MSD) and other high-voltage components, while the Level 1 technician isn't trained for these jobs.

Both technicians are permitted to work on non-electrified components. Neither technician is qualified to work on the high-voltage battery. 

199.

Which of the following doesn't need to be done during lockout or tagout removal without the technician present?

  • Video proof of the removed object and its path to the new location

  • Verification by the employer that the technician is not at the facility

  • Reasonable efforts to contact the technician to inform about the change

  • Ensure the technician understands the removal before resuming work at the facility

Correct answer: Video proof of the removed object and its path to the new location

There's no need to take video proof during a lockout or tagout removal without the technician present. First, the employer must verify that the technician is not at the facility to perform the removal.

After that, reasonable effort must be made to contact the technician. If contact can't be established, the technician must know about the removal before resuming any work. 

200.

What types of high-voltage circuits may the Level 2 technician work on?

  • De-energized

  • Energized

  • Powered

  • Damaged

Correct answer: De-energized

The Level 2 technician is permitted to work on de-energized high-voltage circuits. The steps to de-energize the circuits are provided by the Original Equipment Manufacturer (OEM).

Technicians should never work on energized or powered circuits. If the circuit is damaged, it still needs to be de-energized before being touched. 

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