ISA CCST LEVEL 1 STUDY GUIDE:
DOMAIN 1 EXAM 2025 QUESTIONS AND
ANSWERS
Good manufacturing practice recommends that a test instrument be _______ times more
accurate than the unit under test.
A.2
B.4
C.6
D.8 - ANS B. 4
When troubleshooting a 4-20 mA transmitter, you discover the transmitter is powering off at
100% output. What is the most likley cause?
A. Too much resistance in the loop
B. Too little resistance in the loop
C. Excessive current in the loop
D. Excessive voltage in the loop - ANS A. Too much resistance in the loop
The statement; "Thermocouple extension wires must have the same thermo-electric properties
as the thermocouple that they are used with," is:
A. True if the extension wires are submerged in the process fluid.
B. True in most installations
C.False. Extension wires must be made from either copper or brass.
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, D. False. The type of extension wier makes no difference - ANS B. True in most installations
If a current of 9mA is flowing through a 250 ohm resistor, what would be the voltage drop
across the resistor?
A. 12.5 volts
B. 22.5 volts
C. .225 volts
D. 2.25 volts - ANS D. 2.25 volts
What is the preferred orientation to use when installing a magnetic flowmeter?
A. Vertical, downward flow
B.Horizontal, upward flow
C. Vertical, upward flow
D. Horizontal, downward flow - ANS C. Vertical, upward flow
What pressure, in psi, would be indicated by a properly calibrated absolute pressure gage that
is lying on a workbench at sea level not connected to anything?
A. 0
B. 29
C. 14.7
D. 2.9 - ANS C. 14.7
A gage pressure of 195 psi is roughly what in psia?
A. 151
B. 164
C. 178
D.210 - ANS D. 210
2|P a g e C o p y r i g h t © 2 0 2 5 T H E B R I G H T A L L R I G H T S R E S E R V E D
DOMAIN 1 EXAM 2025 QUESTIONS AND
ANSWERS
Good manufacturing practice recommends that a test instrument be _______ times more
accurate than the unit under test.
A.2
B.4
C.6
D.8 - ANS B. 4
When troubleshooting a 4-20 mA transmitter, you discover the transmitter is powering off at
100% output. What is the most likley cause?
A. Too much resistance in the loop
B. Too little resistance in the loop
C. Excessive current in the loop
D. Excessive voltage in the loop - ANS A. Too much resistance in the loop
The statement; "Thermocouple extension wires must have the same thermo-electric properties
as the thermocouple that they are used with," is:
A. True if the extension wires are submerged in the process fluid.
B. True in most installations
C.False. Extension wires must be made from either copper or brass.
1|P a g e C o p y r i g h t © 2 0 2 5 T H E B R I G H T A L L R I G H T S R E S E R V E D
, D. False. The type of extension wier makes no difference - ANS B. True in most installations
If a current of 9mA is flowing through a 250 ohm resistor, what would be the voltage drop
across the resistor?
A. 12.5 volts
B. 22.5 volts
C. .225 volts
D. 2.25 volts - ANS D. 2.25 volts
What is the preferred orientation to use when installing a magnetic flowmeter?
A. Vertical, downward flow
B.Horizontal, upward flow
C. Vertical, upward flow
D. Horizontal, downward flow - ANS C. Vertical, upward flow
What pressure, in psi, would be indicated by a properly calibrated absolute pressure gage that
is lying on a workbench at sea level not connected to anything?
A. 0
B. 29
C. 14.7
D. 2.9 - ANS C. 14.7
A gage pressure of 195 psi is roughly what in psia?
A. 151
B. 164
C. 178
D.210 - ANS D. 210
2|P a g e C o p y r i g h t © 2 0 2 5 T H E B R I G H T A L L R I G H T S R E S E R V E D
