【Daily Question 20090226】Instrument True or False Questions
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1. To measure flow rate using an orifice plate, it should be installed in front of the control valve. Answer: Correct. 2. Regarding the range of a differential pressure transmitter, it can be adjusted arbitrarily as long as it is less than the standard range value of the instrument. Answer: Incorrect. 3. When checking back-blow type measuring instruments, instead of closing the check valve, the dirt is discharged from the instrument through the vent. Answer: Incorrect. 4. The gauge pressure measured using a U-tube manometer is related to the cross-sectional area of the glass tube. Answer: Incorrect. 5. When using a differential pressure transmitter to measure flow rate, the differential pressure is proportional to the square of the flow rate ( ). Answer: Incorrect
1 pair, 2, 3, 4, 5 are wrong
To measure flow rate using an orifice plate, it should be installed in front of the control valve. (Correct) 2. For the range of a differential pressure transmitter, it can be adjusted arbitrarily as long as it is less than the standard range value of the instrument. (Mistake) 3. When checking back-blow type measuring instruments, the primary valve is not closed; instead, dirt is discharged from the instrument through the vent. (Mistake) 4. The gauge pressure value measured using a U-tube manometer is related to the cross-sectional area of the glass tube. (Mistake) 5. When using a differential pressure transmitter to measure flow rate, the differential pressure is proportional to the square of the flow rate (Mistake)
1. Right 2. Wrong 3. Wrong 4. Wrong 5. Wrong
1 right, 2 wrong, 3 wrong, 4 wrong, 5 wrong
1.R 2.W 3.W 4.W 5.W
Answer: 1. √ 2. × 3. × 4. × 5. ×
1 right, 2 wrong, 3 wrong, 4 wrong, 5 wrong
1. √ 2 . × 3. × 4. × 5. ×
1. True 2. False 3. False 4. False 5. False
Answer: 1, True; 2, False; 3, False; 4, False; 5, False
1. True 2. False 3. False 4. False 5. False
Why do I think 5 is the right answer? Could someone explain this to me?
Answer: 1. √ 2. × 3. × 4. × 5. ×
5 is wrong; it depends on whether the activation is done at the transmitter or at the DCS, PLC, or secondary display instruments! ! ! 1 pair; 2345 is incorrect. For the second question, I think any value within the range of the transmission can be used as a new range point after verification, and that’s exactly what we do in practice. I wonder if everyone understands this question? This post was last edited by xu*ang309 on 2009-3-1 23:13]
1 right, 2 wrong, 3 wrong, 4 wrong, 5 wrong
1. To measure flow rate using an orifice plate, it should be installed in front of the control valve. (Yes) 2. As for the range of the differential pressure transmitter, it can be adjusted arbitrarily as long as it is less than the standard range value of the instrument. (Incorrect) 3. When checking back-blow type measuring instruments, the primary valve is not closed; instead, dirt is discharged from the instrument through the vent. (Incorrect) 4. The gauge pressure measured using a U-tube manometer is related to the cross-sectional area of the glass tube. (Incorrect) 5. When using a differential pressure transmitter to measure flow rate, the differential pressure is proportional to the square of the flow rate. (Incorrect)
Answer: 1. √ 2. × 3. × 4. × 5. ×
1 pair, 2, 3, 4, 5 are wrong