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8021
An aircraft reciprocating engine using hydraulic valve lifters is observed to have no clearance in its valve-operating mechanism after the minimum inlet oil and cylinder head temperatures for takeoff have been reached. When can this condition be expected?
| | A) During normal operation. |
| | B) As a result of carbon and sludge becoming trapped in the lifter and restricting its motion. |
| | C) When the lifters become deflated. |
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