Daily Security Technology Quiz (Single-choice Question) (2016.8.23)
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1. Regular inspection of boiler and pressure vessels refers to the ____ of their pressure-bearing components and safety devices at regular intervals throughout the equipment’s design service life. A. Material property testing B. Integrity inspection C. Inspection and type testing D. Inspection or necessary testing. 2. Before putting chemical pipelines into operation, it is essential to ensure that their strength and tightness meet the design requirements. After the piping is installed, a pressure test must be carried out, known as pressure testing. Except in special cases, pressure testing mainly employs the ____ test. A. Impact B. Negative pressure C. Air pressure D. Hydraulic pressure D;D
1. D. ---------2, C.