Question 1Electricity & Electronics - QMED

The correct answer is B) time delay relay '3T' coil is open-circuited. The explanation is as follows: The winch illustration EL-0102 indicates that the winch will operate normally in all speeds in both directions, except it will not accelerate into the 'fifth point' hoist or 'fifth point' lower. This suggests an issue with the control system that engages the higher speed settings. A possible cause for this behavior is an open-circuited time delay relay '3T' coil, which is responsible for engaging the higher speed settings. If the '3T' coil is not functioning properly, the winch would be unable to reach the fifth point hoist or lower speeds. The other options are incorrect because they do not directly explain the issue with the winch's inability to reach the fifth point speeds. Master switch contacts 'MS 8' being welded closed, 'MS 7' failing to close, or the '5A' contactor coil being open-circuited would not specifically prevent the winch from accelerating to the fifth point speeds.