Process Flow and Instrumentation Flashcards
7 cards from real Ramsay Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Process Flow and Instrumentation flashcards as text
On a P&ID, a circle with a single horizontal line through the middle indicates an instrument that is:
Answer: Mounted on the main control panel in a central control room
A single solid horizontal line means the instrument is panel-mounted in a primary location such as the control room.
In the ISA tag 'FIC-101', the second letter 'I' stands for:
Answer: Indicate
In ISA identification, 'I' is the modifier for Indicate, so FIC is a Flow Indicating Controller.
A device that converts a 3-15 psi pneumatic signal into a 4-20 mA electronic signal is called a:
Answer: Transducer
A transducer (I/P or P/I) converts a signal from one form of energy to another, here pneumatic to electronic.
Which line type on a P&ID typically represents an electrical signal?
Answer: A dashed line
Electrical signal lines are conventionally drawn as dashed lines on a P&ID.
A normally-closed fail-safe control valve will move to which position when its air supply is lost?
Answer: Fully closed
A fail-closed (air-to-open) valve loses its actuating air and the spring drives it shut.
The primary purpose of a process flow diagram (PFD) compared to a P&ID is to show:
Answer: The major equipment and overall process flow
A PFD gives a high-level view of major equipment and material flow, while the P&ID adds full instrumentation detail.
An orifice plate measures flow by detecting:
Answer: The pressure drop created as fluid passes through the restriction
An orifice plate creates a restriction, and the differential pressure across it is proportional to flow rate.