Question 316Electricity & Electronics - Assistant Engineer

70% to pass

During the start-up of the circuit shown in figure "B" of the illustration, it is noted that the ends of component "4" remain lighted but the tube does not illuminate. What is likely the cause of this problem? Illustration EL-0081

Diagram for USCG Electrical Assistant: During the start-up of the circuit shown in figure "B" of the illustration, it...

Acomponent "2" is closed

Bcomponent "3" is open

Ccomponent "4" is the wrong wattage

Dcomponent "5" contacts are stuck closed

AI Explanation

The correct answer is D) component "5" contacts are stuck closed. If the ends of component "4" remain lighted but the tube does not illuminate, it suggests that the current is bypassing the tube. This could be caused by the contacts of component "5" being stuck in the closed position, allowing the current to flow directly through the contacts instead of through the tube. The other options are incorrect because they would not explain the observed behavior - a closed component "2" would prevent current flow entirely, an open component "3" would prevent any lighting, and the wrong wattage for component "4" would not necessarily cause the tube to not illuminate.

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