i am going to attend ongc exam this coming june for Graduate Engineer Trainee post if anybody knows the question pattern or have experience plz share it with me
3 11509Why use ball valves on Gas pipelines instead of gate & or globe valves...means basic diffrence or use of these valves..how designers knows this type of valve with rating is required...
2394wht is snap action switch?where it is used?is there any diff between snap action switch and normal pressure switch?
1 4112why use 50% lel methane gas concentration for gas detector calibration instead of 60% lel gas concentration whereas the hi alarm set at 60% lel.
2793my temperature transmitter in field showing 700 degree , whereas in dcs showing 459 degree, how to resolve this?
4 6624Post New ONGC Instrumentation Interview Questions
TRIM function in Hive with example?
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