2016-11-4 Multiple-choice questions (3 points for participation, 8 points for correct answers)
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Based on which phenomena can one determine whether the pump’s filter screen is clogged? ( ) a. The inlet pressure of the pump decreases and experiences significant fluctuations； The current of motor b decreases and fluctuates ； The opening of the control valve after the C pump’s outlet increased significantly, causing the liquid level in the tank feeding the pump to rise slowly. Answer within two days; no delays allowed! ! ! ! ! ! ! ! ! ABC
The inlet pressure of pump a decreases and fluctuates significantly； The current of motor b decreases and fluctuates ； The opening degree of the control valve after the C pump’s outlet increased significantly, causing the liquid level in the tank feeding the pump to rise slowly