Question 56General Subjects - QMED70% to pass
Which of the valves listed for the device shown in illustration will be open while the unit is operating in the back flush mode? Illustration GS-0153
AI Explanation
The correct answer is C) valves "4" and "14".
When operating in the back flush mode, valves 4 and 14 need to be open to allow water to flow through the system in the reverse direction for cleaning purposes. Valve 4 allows water to enter the system, while valve 14 provides the exit path for the back flushing flow.
The other answer choices are incorrect because valve 5 would typically be closed during back flushing, and having all three valves 4, 5, and 14 open is not the correct configuration for the back flush mode of operation.
Related Questions
#54 The function of item "7" shown in the illustration is to _______________. Illustration GS-0153 #55 The line labeled "C", as shown in the illustration would be identified as the _______________. Illustration GS-0175 #57 In the operation of a lube oil clarifier, the position of the oil/water interface should be _______________.#58 A centrifuge will satisfactorily remove which of the listed substances from lube oil? #59 Of the many impurities commonly found in marine lubricating oil, which of the following CANNOT be removed by a centrifugal purifier at normal operating speeds and temperatures?