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Quiz Session - Attempts With Random Questions

ASE xEV (Level 2) Exam Questions

Page 3 of 10

41.

When should approved leather over-gloves be inspected?

  • Before and after each day's use

  • Before each day's use

  • After each day's use

  • Once a week

Correct answer: Before and after each day's use

Over-gloves must be inspected before and after each day's use. Technicians must inspect the gloves for damage or contamination.

Metal shavings and grease are conductive materials. These contaminants could result in fire or electrical hazard when touching high-voltage materials. Over-gloves should never be used if they are contaminated. 

42.

Without an external current source, all of the following motors cannot turn, except:

  • Permanent magnet motor

  • Induction motor

  • Internal combustion engine

  • Diesel engine

Correct answer: Permanent magnet motor

The permanent magnet motor transfers mechanical energy into electrical energy without the need for an external current source. The induction motor requires an external current source to turn.

The internal combustion engine may be used in hybrid vehicles, but not electric vehicles. Gas- and diesel-powered motors will not start without an external current source. 

43.

Which of these actions doesn't need to be performed as part of planning and documenting the work?

  • Have a supervisor check the work area

  • Prepare the environment

  • Have an action plan for all contingencies

  • Brief others

Correct answer: Have a supervisor check the work area

Supervisors aren't needed to check the work area. Level 2 and Level 3 technicians are equipped for preparing, planning, and documenting the work with the help of another technician. 

What must always be done is to prepare the environment, have an action plan for all contingencies, and brief others. 

44.

What is used in xEVs to detect the defects in insulation?

  • Integrated electrical leakage detectors

  • Battery Management System (BMS)

  • Onboard charger

  • Power electronics controller

Correct answer: Integrated electrical leakage detectors

Integrated electrical leak detectors are used in xEVs. These detectors monitor for a loss of isolation within the high-voltage components and inverter. The detectors detect defects in the insulation or other physical damage to prevent injury. 

The Battery Management System (BMS) monitors the condition of the battery, but isn't looking for loss of isolation. The onboard charger and power electronics controller only have to do with the charging of the EV. 

45.

Which of the following organizations must test and certify the test tools in the United States?

  • UL (Underwriter Laboratories)

  • CSA (Canadian Standards Association)

  • TÜV (Technischer Überwachungsverein)

  • OSHA (Occupational Safety and Health Administration)

Correct answer: UL (Underwriter Laboratories)

UL (Underwriter Laboratories) is one of the independent testers that must certify the tools in the United States. All test tools must be certified by two or more independent laboratories. 

The CSA (Canadian Standards Association) is an option for Canada, while TÜV (Technischer Überwachungsverein) is standard in Europe. 

46.

Which of the following skills does the Level 2 technician not need?

  • Repairing high-voltage battery packs

  • Identifying potential hazards

  • Repairing high-voltage systems

  • Creating a safe work environment

Correct answer: Repairing high-voltage battery packs

The Level 2 technician has not been trained to repair high-voltage battery packs. Only a Level 3 technician is qualified for this work.

The Level 2 technician has received training to operate and repair high-voltage systems. They also maintain a safe working environment, use Personal Protective Equipment (PPE), and can identify potential hazards to reduce the risk. 

47.

Which of the following situations won't cause a lithium-ion battery to release toxic gases or explode?

  • Full charge

  • Incorrectly charged

  • Damaged

  • After an accident

Correct answer: Full charge

Lithium-ion batteries contain toxic substances and flammable electrolytes. The batteries are made from nickel, manganese, lithium, cobalt, and other hazardous substances.

When the battery is incorrectly charged or damaged, it can release toxic substances. It can also lead to an explosion or a fire. 

48.

To de-energize the system, what instructions must be followed?

  • Original Equipment Manufacturer (OEM)

  • Dealership

  • OSHA

  • ASE

Correct answer: Original Equipment Manufacturer (OEM)

ASE provides generic guidelines for de-energizing the system. All of the Original Equipment Manufacturer (OEM) guidelines should be followed as these can differ based on the make and model of the vehicle.

The dealership guidelines should adhere to both OSHA and the OEM. 

49.

When an arc flash occurs, what can accompany it?

  • Explosive release of thermal energy

  • Flashing lights

  • Screeching noise

  • Leaking contaminants

Correct answer: Explosive release of thermal energy

When the insulation or air separation between two high-voltage conductors is compromised, an arc flash can occur. This plasma arc forms between the two conductors. 

An arc flash releases a potentially explosive release of thermal energy. This release may trigger a blast, similar to a bomb, known as an arc blast. 

50.

During what event should CPR be performed?

  • Cardiac arrest

  • Heart attack

  • Stroke

  • Broken bone

Correct answer: Cardiac arrest

Cardiac arrest is when the heart stops beating unexpectedly. It's caused by an electrical malfunction in the heart.

A heart attack is when there's a blockage to the blood circulation. Typically, when a person experiences a heart attack, they will remain conscious, but cardiac arrest is possible following a heart attack. 

51.

Which of the following isn't a procedure that the Original Equipment Manufacturer (OEM) will ask before de-energizing the system?

  • Drive the vehicle

  • Roll down windows

  • Check Diagnostic Trouble Codes (DTCs)

  • Open hatch/doors

Correct answer: Drive the vehicle

Every Original Equipment Manufacturer (OEM) has different guidelines to follow before de-energerizing the system. With these guidelines, the technician won't be asked to drive the vehicle first.

Some of the possibilities that may be asked include checking the Diagnostic Trouble Codes (DTCs). You may also be asked to open doors, open the hatches, and roll down the windows. 

52.

Barricades must be used with signs and tags to prevent access to work areas with live activated components operating at what minimum degree?

  • 30 V AC rms or 60 V DC

  • 20 V AC rms or 50 V DC

  • 40 V AC rms or 70 V DC

  • 50 V AC rms or 80 V DC

Correct answer: 30 V AC rms or 60 V DC

Any time that live activated components are operating at 30 V AC rms or 60 V DC or more, barricades must be used to prevent access. Barricades are used in conjunction with signs and tags.

Attendants must be used if barricades don't provide enough protection from electrical hazards. 

53.

All of the following places may include certification marks for test tools, except:

  • Test probes

  • Meter body

  • Catalogs

  • Brochures

Correct answer: Test probes

Certification marks aren't placed on the test probes. Marks may be stamped on the meter body. These marks may also be included in meter catalogs and brochures. 

These marks are important to find because they ensure the meter has been independently tested and certified. 

54.

What is the term used to describe the high power discharges of electricity occurring between two or more conductors?

  • Arc faults

  • Electric jump

  • Flash bang

  • Shorted connector

Correct answer: Arc faults

Electrical arc faults are high power discharges of electricity that occur between two or more conductors. This malfunction is one of the most common causes of fire.

The heat coming from the discharge causes the wire insulation to breakdown and deteriorate, leading to the arc or spark that creates a fire. 

55.

How should labeled components be opened?

  • By Original Equipment Manufacturer (OEM) instructions

  • By Level 1 technicians

  • While standing on a rubber mat

  • They don't need to be opened

Correct answer: By Original Equipment Manufacturer (OEM) instructions

Any high-voltage component with a label attached should be opened according to the Original Equipment Manufacturer (OEM) instructions. Directions can differ based on the make and model of the vehicle. 

These components are only to be opened by Level 2 or 3 technicians. The insulated rubber mat is a great tool that can prevent electric shock, but it's not required. 

56.

What must be done before tagout or lockout items are restored to their original purpose?

  • Work area should be inspected

  • Nothing

  • Helper technician must sign for them 

  • Supervisor approves work

Correct answer: Work area should be inspected

Before restoring any components to their original location, the work area must be inspected. It's vital that all of the components are in a safe location and other people are clear from the area.

Removed components shouldn't be reinstalled until the work area is cleared by the technician working on the vehicle. The components also shouldn't be touched by another technician. 

57.

What happens when an open interlock circuit is detected?

  • High-voltage contactors in the battery housing immediately open

  • Fire breaks out

  • All high-voltage systems shut down

  • Computers detect a fault and safety systems kick in 

Correct answer: High-voltage contactors in the battery housing immediately open

The interlock circuits in high-voltage components are configured as a series circuit with multiple switches and connectors that attach to low-voltage sources. When the connectors are seated and the switches are closed, current goes through the interlock circuit to reduce voltage.

If an open interlock circuit is detected, high-voltage battery contactors receive a command to open. The active discharge of the high-voltage bus completes in less than one second. 

58.

What type of vehicle has a special Active Air Suspension indicator?

  • Tesla

  • HEVs

  • BEVs

  • PHEVs

Correct answer: Tesla

Tesla vehicles are the only type with an Active Air Suspension warning light. This light shows a car with an arrow pointing up and down. It indicates a fault in the system that needs to be checked by a Tesla technician. 

Other BEVs (Battery Electric Vehicles) don't contain this warning light. It also won't be found on hybrids or vehicles with internal combustion engines. 

59.

What's the difference between an IP68 and IP67-rated tool?

  • Time it can be submerged in water

  • How deeply it can be submerged in water

  • How much dust is blocked

  • There's no difference

Correct answer: Time it can be submerged in water

The second digit of the IP rating indicates it's protection against water. Both the seven and eight indicate that the tool can be submerged in one meter of water, but the time differs between the two. 

With the seven, the tool can withstand water at one meter for thirty minutes. A rating of eight indicates that the tool can be submerged for continuous submersion, making it waterproof. 

60.

What is the name for the line connected to the chassis ground and electrified components that proactively detect varying voltages and initiates pre-emptive isolation?

  • Equipotential bonding line

  • Isolating line

  • De-energized line

  • Safety line

Correct answer: Equipotential bonding line

The equipotential bonding line is designed to connect to the electrified components and chassis ground. It's designed to detect the varying voltages and initiate pre-emptive isolation. 

With the equipotential bonding line in place, potential failures are prevented when a fault occurs. 

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