Question 9019 of 731 · Texas Journeyman Electrician Exam
What is the basic design principle of explosionproof equipment?
Exactly one answer is correct.
You got of questions right. Here on the question pages nobody remembers which ones you got wrong. The trainer saves your progress and asks the mistakes again until they stick.
Or free: the 10 questions most people get wrong
Show solution
Correct answer to question 9019
- B: It withstands an internal explosion and prevents ignition of the surrounding atmosphere
Explanation
Explosionproof equipment is built to contain an explosion of a gas or vapor inside the enclosure and to cool escaping gases so the surrounding atmosphere is not ignited. Low-energy design describes intrinsic safety, and positive pressure describes purged and pressurized equipment.
More questions: Special Occupancies
- 9020Intrinsically safe systems covered by Article 504 rely on which protection principle?
- 9021At a motor fuel dispensing facility, how is the area up to 18 in above grade within 20 ft horizontally of a dispenser enclosure classified?
- 9022The emergency electrical disconnect for fuel dispensers must open which conductors of the circuits to the dispensing equipment?
- 9026In a major repair garage for gasoline vehicles without the specified mechanical ventilation, how is the floor area up to 18 in above the floor classified?
- 9029In health care facilities, a patient care space where failure of equipment or the electrical system is likely to cause major injury or death is which category?
- 9030A patient care space in which failure of equipment is likely to cause only minor injury to patients or caregivers is classified as which category?