Question 13 of 30
How is intrinsic safety achieved for electrical circuits used in hazardous areas?
A
By limiting the ignition energy and surface temperature that can arise during operation
B
By limiting the number of equipment used in a space
C
By increasing mechanical ventilation to the area
D
By installing machinery which have higher power and thus shorter operation time
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Answer & Explanation
The correct answer is Option A: By limiting the ignition energy and surface temperature that can arise during operation.
Intrinsic safety design limits the electrical energy (voltage and current) within a circuit to a level that is too low to produce the sparks or heat required to ignite an explosive atmosphere.