485. "Air driven lamps of an approved type may be used in dangerous or hazardous areas although to avoid the accumulation of static electricity at the appliance, what precautions should be observed?"

A. The air supply should be connected to a high-voltage power source
B. The supply hose should be made of insulating material
"C. The air supply should be fitted with a water trap, the supply hose should be of low electrical resistance, and permanently installed units should be earthed."
D. No precautions are necessary as air-driven lamps are inherently safe

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MCQ.Marinesite

485. "Air driven lamps of an approved type may be used in dangerous or hazardous areas although to avoid the accumulation of static electricity at the appliance, what precautions should be observed?"

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Marinesite MCQs