EVT Safety Standards & Regulatory 5

Question 1

What is the significance of the 'orange color coding' standard for high-voltage cables in electric vehicles?

Accepted Answer

It is required by SAE J1673 and ISO 6469 to identify HV cables for safety

Answer

SAE J1673 and ISO 6469 standardize orange color coding for HV cables above 60V DC or 30V AC to warn technicians and emergency responders of electrocution risk.

Question 2

Which NFPA standard specifically addresses the fire safety of lithium-ion battery energy storage systems in commercial facilities?

Accepted Answer

NFPA 855

Answer

NFPA 855 is the Standard for the Installation of Stationary Energy Storage Systems, addressing fire safety for lithium-ion battery installations in commercial and industrial settings.

Question 3

When performing a pre-work risk assessment on an EV HV system, which hazard energy source is often overlooked but must be controlled per OSHA LOTO?

Accepted Answer

Capacitors in the inverter retaining stored charge

Answer

Inverter capacitors can retain dangerous voltage levels even after HV battery isolation, making capacitor discharge a critical step in LOTO procedures.

Question 4

The EPA's SmartWay program relates to EV technology in what regulatory context?

Accepted Answer

It measures and certifies fuel efficiency and environmental performance of vehicles

Answer

EPA's SmartWay program measures and certifies the environmental performance and fuel efficiency of vehicles, including EVs, helping consumers compare environmental impact.

Question 5

What does the 'control pilot signal' in SAE J1772 primarily communicate during the charging process?

Accepted Answer

EVSE availability, current capacity, and vehicle readiness to charge

Answer

The J1772 control pilot uses a PWM signal to communicate between EVSE and vehicle, indicating EVSE availability, available current capacity, and vehicle readiness states.

(EVT) Certified Electric Vehicle Technician Practice Test

(EVT) Certified Electric Vehicle Technician Practice Test

EVT Safety Standards & Regulatory 5