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Quiz Session - Attempts With Random Questions

ASE xEV (Level 2) Exam Questions

Page 2 of 10

21.

What happens to the capacitors during de-energizing?

  • They are discharged

  • They get energized

  • They retain voltage

  • Nothing

Correct answer: They are discharged

During the de-energizing procedure, the capacitors get discharged so there is no electrical current remaining. The instructions for this process are offered by the Original Equipment Manufacturer (OEM).

Capacitors must be discharged for a prescribed amount of time before testing for voltage. 

22.

What is the electrically safe work condition?

  • State

  • Procedure

  • Process

  • Chain of command

Correct answer: State

The electrically safe work condition is a state where the high-voltage electrical circuit parts and conductors are disconnected or isolated from energized high-voltage parts. It's not a procedure that gets done, but the state that occurs when the procedures are performed.

In an electrically safe work condition, the parts have no voltage. This condition allows the technician to work without the use of Personal Protective Equipment (PPE). 

23.

Technician A says that insulated hand tools must be flame-resistant. Technician B says that they need to be fireproof. Which one is correct?

  • Technician A

  • Technician B

  • Neither

  • Both

Correct answer: Technician A

Insulated hand tools must be Flame-Resistant (FR). They aren't fireproof. Therefore, Technician A is correct. 

Based on ASTM F1505-10, insulated hand tools must also function between the temperatures of -4 °F (-20 °C) and 158 °F (70°C). 

24.

How should the CAT-rated test leads and accessories match with the CAT rating of the test tool?

  • Equal or exceed

  • Equal

  • Doesn't matter

  • Less than

Correct answer: Equal or exceed

The CAT-rated test leads and accessories must match or exceed the rating of the test tool. They must also have a minimum of one insulated alligator clip for the COM connection. 

The test tool must be either a CAT II 600 V, CAT III 1000 V, or CAT IV 600 V rated. 

25.

What does the Regenerative Braking System Light mean?

  • System is active

  • System malfunction

  • Check regenerative brakes

  • Recharge is needed

Correct answer: System is active

The RBS (Regenerative Braking System) light indicates that the regenerative braking system is active. It lights up when the EV (Electric Vehicle) is using regenerative braking and is not an indication that something is wrong.

If there was an issue with the braking system, a warning light with an exclamation symbol would appear. This Regenerative Brake Warning means there's a fault in the system. 

26.

What is the name of the foam-filled fiberglass pole that safeguards technicians assisting people that are victims of electrical shock?

  • Retrieval hook

  • Push stick

  • Wonder wand

  • Assist pole

Correct answer: Retrieval hook

An insulated retrieval hook is also known as a rescue hook or a hot stick. It's a foam-filled fiberglass pole that can be used to assist victims of electrical shock. 

The retrieval hook helps to remove injured people from hazardous areas. Technicians should be trained to separate a person from an active circuit if power can't be shut off. 

27.

Which of the following isn't an appropriate meter rating for Level 2 and Level 3 technicians?

  • CAT II 600 V

  • CAT III 600 V

  • CAT III 1000 V

  • CAT IV 600 V

Correct answer: CAT II 600 V

The CAT II 600 V meter isn't appropriate for work on xEVs. The technician must make sure the meter and accessories have a rating of CAT III 600 V, CAT III 1000 V, or CAT IV 600 V.

It's the responsibility of both the Level 2 and Level 3 technicians to verify these ratings before starting any work. 

28.

What is the required measurement for insulation resistance, according to FMVSS 305 S5.4.3.1?

  • At least 500Ω per volt

  • At least 750Ω per volt

  • At least 1,000Ω per volt

  • At least 250Ω per volt

Correct answer: At least 500Ω per volt

Based on Federal Motor Vehicle Safety Standards, the required measurement for insulation resistance must be 500Ω per volt or more. The higher the temperature is, the lower the insulation resistance is. 

Most tests are expected to provide an insulation tester reading of more than 550 MΩ. It's important to verify all of the readings with the specifications from the Original Equipment Manufacturer (OEM). 

29.

Which of the following does not need to be tested for insulation resistance?

  • Connection to auxiliary battery

  • High-voltage cables

  • Connections of the high-voltage battery

  • Battery Management System (BMS)

Correct answer: Connection to auxiliary battery

The connection to the auxiliary battery is low-voltage. Therefore, a test of insulation resistance doesn't need to be performed.

Insulation resistance should be tested on all high-voltage cables, the connections of the high-voltage battery, and of the Battery Management System (BMS). It should also be checked between the shielding and the conductor, at high-voltage coolant heaters, with power electronics, electric motors, and the A/C compressor.

30.

What does the face shield protect the eyes from?

  • Arc flash

  • Corrosive materials

  • Debris to the eyes

  • Fire

Correct answer: Arc flash

Face shields are used to protect the eyes from flash over or arc flash. This condition can occur if electrical arcing is produced when working on energized parts or the electrified xEV batteries.

Face shields must have a full 180 degree field of vision and be rated for arc thermal protection. 

31.

Technician A says that retractable probes can be used to avoid accidentally touching metal to metal and causing a short circuit. Technician B says that this is not necessary. Which technician is correct?

  • Technician A

  • Technician B

  • Both

  • Neither

Correct answer: Technician A

All technicians should use either retractable probes, probes with short tips, or probe tip covers. This step ensures that metal doesn't accidentally touch metal, which would create a short circuit. 

The length of the exposed test tips should be 4 mm for it to remain a CAT III and CAT IV work environment. 

32.

What do the oscilloscopes require to allow for floating measurements?

  • Differential probes

  • Stainless steel case

  • Digital display

  • Cursors

Correct answer: Differential probes

Oscilloscopes (multi-channel instruments) are used to read floating measurements. These must have differential probes or isolated channels using separate Analog-to-Digital (A to D) converters. 

Multi-channel instruments are used because the high-voltage system is completely isolated from the chassis ground, which produces the floating measurements. 

33.

What is the resistance measurement of good test leads?

  • 0.1–0.3 Ω

  • 0 Ω

  • 0.4–0.6 Ω

  • 0.7–0.9 Ω

Correct answer: 0.1–0.3 Ω

Good test leads measure 0.1–0.3 Ω. To check test lead resistance, insert them into the V/Ω and COM inputs.

Select Ω and touch the probe tips securely. The test lead resistance displays on the screen. 

34.

Technician A states that a vehicle may not run after the Diagnostic Trouble Code (DTC) is set due to a loss-of-isolation circuit. Technician B says that the DTC may not affect driveability.

Which technician is correct?

  • Both

  • Technician A

  • Technician B

  • Neither

Correct answer: Both

The loss-of-isolation causes a Diagnostic Trouble Code (DTC) after two consecutive trips for the same failure. As a safety precaution, the vehicle may not turn on after the power is shut down.

On the other hand, the vehicle may be completely driveable during this time. Therefore, both technicians are correct. 

35.

When replacing high-energy fuses in test tools, what must match?

  • Amperage rating

  • Color

  • Price

  • Brand

Correct answer: Amperage rating

If the technician must replace a high-energy fuse, it should have the same amperage rating. It must also be the same quality. 

These fuses are meant to keep energy generated by an electrical short contained inside the fuse enclosure. Don't substitute for a non-recommended fuse or bypass fuse protection of the test tool. 

36.

Technician A says that the CAT III 600 V rated meter is superior to the CAT II 1000 V rated meter. Technician B says that the CAT II 1000 V rated meter is superior to the CAT III 600 V rated meter. Which one is correct?

  • Technician A

  • Technician B

  • Neither

  • Both

Correct answer: Technician A

It appears that the CAT II 1000 V rated meter is superior to the CAT III 600 V rated meter because the voltage is higher, but the CAT rating is what's important in this comparison. A CAT II rated meter isn't as protective as the CAT III rated meter.

When calculating voltage-withstand ratings, IEC 610010-1 test procedures take into account the steady-state voltage, source impedance, and peak impulse transient voltage. 

37.

What is responsible for monitoring the battery's temperature?

  • Battery Management System (BMS)

  • Electric traction motor

  • DC/DC converter

  • Thermal cooling system

Correct answer: Battery Management System (BMS)

The Battery Management System (BMS) monitors the temperature. It's also responsible for checking overall state-of-health and cell voltages. The information received by the BMS is processed and sent to the various sensors and computers, allowing systems to make adjustments as needed. 

The electric traction motor is responsible for changing power to mechanical energy, while the DC/DC converter changes the high-voltage DC current to lower voltage for accessories. The thermal cooling system is responsible for the temperature of the motor and power electronics.

38.

At what level of electric shock are severe burns and internal organ damage probable? 

  • Over 2,000 mA

  • Between 6–16 mA

  • Between 17–99 mA

  • Between 100–2,000 mA

Correct answer: Over 2,000 mA

Once the electrical current reaches over 2,000 mA, there's a high chance of severe burns and internal organ damage. Cardiac arrest is also a high probability.

Even a shock lower than this can lead to death, nerve damage, muscular contractions, and ventricular fibrillation. 

39.

What does AED stand for?

  • Automated External Defibrillator

  • Assisted Energy Device

  • Abnormal Electric Digits

  • Auto Electrified Database

Correct answer: Automated External Defibrillator

The Automated External Debrillator (AED) is a power device that delivers a shock to the heart to get it beating normally. It's often used with CPR (Cardiopulmonary Resuscitation).

Using AEDs drastically increases the chance of survival for a victim of cardiac arrest. They are only meant to be used by trained individuals.

40.

Which of the following ensures high-quality CPR?

  • Minimized interruptions in chest compressions

  • Pushing on the chest as hard as possible

  • Leaning on the victim between compressions

  • Extra breaths given beyond what's called for

Correct answer: Minimized interruptions in chest compressions

Anybody can provide high-quality CPR. One of the keys is to minimize interruptions in chest compressions.

Along with that, the compressions must be of adequate rate and depth, and the person should never lean on the victim. Proper hand placement must be performed and excessive ventilation should be avoided. 

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