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Q. |
For adequate test results, the black light used in fluorescent penetrant examination should provide what minimum black light intensity at the test surface? |
A. | 100 foot candles per square centimetre |
B. | 1000 microwatts per square centimetre |
C. | 800 foot candles |
D. | 35 microwatts per square centimetre |
Answer» B. 1000 microwatts per square centimetre |
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