Question 34General Subjects - Assistant Engineer
70% to passWhen checking the oil level on a reciprocating air compressor fitted with a dipstick, under what conditions should the oil level be checked?
AWith the compressor running at speed and unloaded.
BWith the compressor running at speed and loaded.
CWith the compressor in the auto mode and currently not running.
DWith the compressor in the off mode incapable of starting.
AI Explanation
The correct answer is D) With the compressor in the off mode incapable of starting. When checking the oil level on a reciprocating air compressor, it is important to have the compressor in the off mode and incapable of starting. This ensures that the oil level is measured accurately, as the compressor needs to be completely stationary and not under any load or operating conditions. Checking the oil level with the compressor running (options A and B) or in auto mode (option C) could result in an inaccurate reading, as the oil level may be affected by the compressor's operation. Checking the oil level with the compressor in the off mode and incapable of starting is the safest and most accurate method.
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