Pressure Measurement

1. Another word for “pressure” is
a) pH
c) Density
d) Force
2. If a force of 3400 pounds is applied to a circular piston 2 inches in diameter, calculate the fluid pressure working against the piston.
a) 344.5 PSI
b) 270.6 PSI
c) 850 PSI
d) 1082.3 PSI
3. Which of the following is not a type of pressure sensing element?
a) Bellows
b) Bourdon tube
c) Manometer
d) Orifice plate
4. If the pressure applied to the “low” side of a ∆P transmitter increases while the pressure applied to the “high” side remains steady, the transmitter output should
a) Fail low
b) Remain the same
c) Increase
d) Decrease
5. Convert a pressure measurement of 20 PSIA into units of inches water column (gauge)
a) 1321” H2O
b) 510.1” H2O
c) 701.2” H2O
d) 146.7” H2O
6. Identify the proper sequence of valve actions for a three-valve manifold and bleed when taking a differential pressure transmitter out of service
a) Open bleed, close one block valve, open equalizing valve, close other block valve
b) Open equalizing valve, close both block valves (simultaneously), open bleed
c) Close one block valve, open equalizing valve, close other block valve, open bleed
d) Close one block valve, open bleed, close other block valve, open equalizing valve
Answer : Close one block valve, open equalizing valve, close other block valve, open bleed
7. What is the difference between water and transformer oil as a manometric liquid?
a) Water is used for large pressure differential
b) Transformer oil is used for large pressure differential
c) Transformer oil has evaporation problems
d) Water has evaporation problems
8. Which of the following is detected using manometer devices?
a) Pressure difference between manometric and measuring liquid
b) pH difference between manometric and measuring liquid
c) Density difference between manometric and measuring liquid
d) None of the mentioned
Answer: Pressure difference between manometric and measuring liquid
9. Using a membrane for measuring pressure, which of the following represents correct relation for displacement?
a) (R2 Î”P)/4S
b) Î”P/4S
c) (R2 Î”P)/S
d) (R2 Î”P)/2
10. ‘In bellows pressure to displacement conversion takes place’.
a) True
b) False
11. ‘Capsules are made from diaphragms’.
a) True
b) False
12. In which of the following categories be thin plate diaphragm included?
a) Primary transducer
b) Secondary transducer
c) Voltage measuring devices
d) Spring balance systems
13. Which of the following devices convert pressure to displacement?
a) Diaphragm
b) Bellow
c) Capsule
d) Both diaphragm and capsule
14. Which of the following conversion take place in bourdon tubes?
a) Pressure to displacement
b) Pressure to voltage
c) Pressure to strain
d) Pressure to force
15. Which of the following applications are suited for thin plate diaphragms?
a) Static pressure only
b) Dynamic pressure only
c) Both static and dynamic pressure with large frequency
d) Both static and dynamic pressure with small frequency
Answer: Both static and dynamic pressure with small frequency
16. Which of the following quantities can be measured using bellows?
a) Absolute pressure
b) Gauge pressure
c) Differential pressure
d) All of the mentioned