EPRI Flashcards
What pressure, in psi, would be indicated by an abbsolute pressure gage that is lying on a work bench not connected to anything?
A.0 B.29 C.14.7 D. 2.9
C.14.7
A gage pressure of 195 psi is roughly what is psia? A.151 B.164 C.178 D.210
D.210
Which of the following will have the highest pressure difference between the surface and 6 in. below the surface?
A. A 12in vertical straw filled with water
B. A 10ft diameter open tank filled with water
C.A 5ft diameter vertical pipe filled with water
D.none of the above
D. none of the above
If a cubic foot of water weighs 62.4 pounds in a 1ft cube, it exerts a pressure of how many pounds per square inch on the bottom of the container?
A.0.036 B.2.308 C.0.433 D. 14.7
C.0.433
Hydrostatic head is another way of expressing:
A.gallons B. pressure C. length D. mass
B.Pressure
All physical measurements are based on the fundamental quantities of:
A. mass, length, and time
B.density, viscosity, and specific gravity
c. flow, volume, and temperature
D. pressure, density, and specfic gravity
A. Mass, length, and time
Gallons per minute is a unit of measurement for: A.level B.Flow C.pressure D.temperature
B.Flow
Dividing the density of the process fluid by the density of the ____ gives a dimensionless number called specific gravity.
A. mercury or mercury vapors
B.Oil or natural gas
C.water or air
D. any known liquid or gas
C. water or air
As the speed (velocity) of a fluid increases through a restriction, the fluid pressure: A. increases B.Decreases C.Remains unchanged D.First increases then decreases
B.Decreases
What celsius temperature reading is within an oven temp of 215-220 degrees Fahrenheit? A.103 B.110 C.329 D.338
A.103
The difference between the indication of the instrument and the actual value of the measure variable is: A.the controlled variable B. Called set point C.an error in the measuring instrument D. discarded
C. An error in the measuring instrument
The temp range of a transmitter is 0-200 Degrees F. The output signal range is 3-1 psig. What could be the expected output signal for an input temperature of 150 degree F. A. 6 psig B.9 psig C. 11.25 psig D.12 psig
D.12 psig
Using ANSI/ISA standards, the red lead from a thermocouple or extension wire is always the \_\_\_\_ lead. A.positive B.Negative C.Neutral D.Ground
B. negative
A measurement instrument error is the difference between the actual value of the measured variable and \_\_\_\_\_. A. its true value B.the calibration standard C.input and output signals D. the indication of the instrument
D. the the indication of the instrument
To ensure the accuracy of a pneumatic controller throughout its range, you must precisely adjust all of the following EXCEPT: A.supply pressure B.Input C.Span D. zero
A.supply pressure
A device that converts AC to DC is called a\_\_\_\_. A.rectifier B.ratio station C.differential amplifier D.Comparator
A. rectifier
A test instrument that displays a waveform is a \_\_\_\_\_. A function generator B.ammeter C.multimeter D.oscilloscope
D. oscillioscope
If an open tube manometer indicates 6.11 in of HG, what is the pressure measurement? A.2 psi B.3psia C.17.89 psig D.3 psig
D. 3psig
Which of the following could be used to calibrate a pressure gage 0 to 800 PSI?
a. dead weight tester
b. a mercury manometer
c. the plant instrument air supply
d. multimeter
A.dead weight tester
2 psi is equal to \_\_\_\_ inches of water. A.1 B.27.7 C.14.7 D.55.4
D. 55.4
Which of the following is usually adjusted first when calibrating an electronic pressure transmitter? A.linearity B.span C.zero D.range
C. zero
The calibration plot (FIG 1-1) shows that the transmitter does need calibration to correct for: A. a zero error. B. span error C. both a zero and span error D. a linearity error
A. zero error
The Reynolds No. Determines: A. the venturi effect B. the coriolis acceleration C. the fluid viscosity D. if the flow is laminar or turbulent
D. if the flow is laminar or turbulent
The flow rate in gallons per minute of water with a specific gravity of 1 provided by a pressure differential of 1.0 psi through a fully opened control valve is a definition of \_\_\_\_ a. Cv B.DP C. Ov D.SG
A. Cv
