What is an arc flash - Study guides, Class notes & Summaries

What is an Arc Flash? - ANSWER A short circuit that jumps through the air from one exposed conductor to another. What makes an Ar Flash dangerous? - ANSWER Temperatures of up to 35k' F, shrapnel, molten metal, chocks, shockwave (2k lbs/foot^2), soud (140 dB), burn injuries. Hazard/Risk Category 1 contains PPE requirements. What are they? - ANSWER hardhat, safety glasses, hearing protection, heavy duty leather gloves, leather work shoes. What proper electrical PPE protect you from? - AN...

NETA 2 Top Exam Questions and answers, rated A+ Under what considerations can tag out without lock out be permitted? - -***&If an energy isolating device is not capable of being locked For PV systems, a(n) _____ is a device that changes direct-current input to an alternating-current output. - -Inverter Identify the contact pictured above. (NC and NO separated by a node) - -Form C When applying personal protective grounds, which end is attached first? - -***&The equipment end An ...

CWB Level 2 Welding Inspection Exam Questions With 100% Correct Answers Latest Update 2024 (Graded A+) Creating a safe working environment is strictly the responsibility of the employer? - Correct Answer-False, it the the joint responsibility of the employer and employee. WHMIS stands for: a) Workers Health Monitoring System b) Workplace Hazardous Materials Information System c) Workers for a Healthy Manufacturing Industry Society - Correct Answer-b) Workplace Hazardous Materials Informat...

Nfpa 70e Exam Questions and Answers 100% AccurateNfpa 70e Exam Questions and Answers 100% AccurateNfpa 70e Exam Questions and Answers 100% Accurate Three main electrical hazards working on energized circuit - ANSWER-Shock, fire, arc What is an arc flash? - ANSWER-A type of electrical explosion or discharge that results from low impedance connection through air to ground or another phase. What is an arc blast? - ANSWER-The explosive burst of energy that occurs during an arc flash.

IAAI CFI Exam Questions With Verified Answers Latest Update 2024/2025 | Graded A+. A liquid with a flash point ABOVE 100F - correct answers Combustible Liquid If the current flowing out from an electrical panel is 12.5 amps, and it then flows through an electrical load of 1500 watts, what is the amperage of the remaining current flow of the return circuit? - correct answers 12.5 If a hair dryer draws 8.3amps (in a home with 120-volt service), what is the wattage? *Power (P) = current (I) ...

IAAI CFI & NFPA 921 Exam Questions With Answers Latest Updated 2024/2025 | Scored A+. "Rule of Nines" correct answers Medical concept, where major body areas are represented by increments of 9% *For example the head equals 9% 109F correct answers In hyperthermia, what core body temperature is generally fatal within minutes unless treated? 4.0 to 10 w.c. correct answers The typical water column range for gas service lines 4th Amendment correct answers The amendment concerning search and s...

"Rule of Nines" Medical concept, where major body areas are represented by increments of 9% *For example the head equals 9% 109F In hyperthermia, what core body temperature is generally fatal within minutes unless treated? 4.0 to 10 w.c. The typical water column range for gas service lines 4th Amendment The amendment concerning search and seizure *Remember "knocking" 5th Amendment The amendment concerning pleading, grand jury and double jeopardy *Re...

NHIE Study Questions with All Correct Answers What is the minimum electrical clearance over a residential driveway? - Answer- 12 feet Which event is most likely to cause arc flash? - Answer- Metal touching an energized conductor In a subpanel, you are required to - Answer- Isolate the neutral bus and conductors from contacting the panel enclosure Aluminum branch circuit wiring was commonly used in what years? - Answer- A circuit breaker protects against too much - Answer- Curre...

IAAI CFI Exam Questions With Verified Answers Latest Update 2024/2025 Rated A+. A liquid with a flash point ABOVE 100F - correct answers Combustible Liquid If the current flowing out from an electrical panel is 12.5 amps, and it then flows through an electrical load of 1500 watts, what is the amperage of the remaining current flow of the return circuit? - correct answers 12.5 If a hair dryer draws 8.3amps (in a home with 120-volt service), what is the wattage? *Power (P) = current (I) x v...

Study Guide Exam for NFPA 70E FINAL 2024 True or False: A mandatory rule can have exceptions. - CORRECT ANSWER-False True or False: Permissive rules are allowed but not required to be performed - CORRECT ANSWER-true What does NEC stand for? - CORRECT ANSWER-National Electrical Code What do chapters 1-4 of the NEC cover - CORRECT ANSWER-General electric installations What do chapters 5-7 of the NEC cover - CORRECT ANSWER-Special equipment and loctations What does chapter 8 of the NEC ...