Piping and Instrumentation Diagram (P&ID) Quiz

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33 Questions

Which diagram includes more detail, the P&ID or the PFD?

The P&ID

What does the P&ID show the details of?

The general piping orientation

What is the purpose of P&IDs in the operation, repair, and modification of the plant?

To provide a concise format for how a system should function

Which instrument is used to sense the tank level in the control loop described in Figure 7?

Level Indicator (LI)

What type of control system is indicated by the control lines in Figure 7?

Pneumatic

What instrument records the tank level in the control loop described in Figure 7?

Level Recorder (LR)

What type of signal does the level controller send to the diaphragm-operated level control valve in Figure 7?

Pneumatic

Which of the following is NOT typically shown on a P&ID diagram?

Instrumentation

What is the purpose of a P&ID diagram during the design and pre-construction phases?

To develop cost estimates and bid proposals

What do P&IDs provide to field construction and inspection personnel during construction?

A reference for proper equipment location

What do P&IDs serve as for plant operating and engineering staff after construction?

Operational and training reference

Which instrument is used to sense the tank level in the control loop described in Figure 7?

Level Indicator

What type of control system is indicated by the control lines in Figure 7?

Pneumatic

What instrument records the tank level in the control loop described in Figure 7?

Level Recorder

What type of signal does the level controller send to the diaphragm-operated level control valve in Figure 7?

Pneumatic signal

Which diagram provides more detail, the P&ID or the PFD?

The P&ID

What information does the P&ID show about equipment orientation?

General piping orientation

What is the purpose of P&IDs in the operation, repair, and modification of the plant?

To provide a concise format for how a system should function

Which of the following is typically shown on a P&ID diagram?

All of the above

What is the purpose of a P&ID diagram during the design and pre-construction phases?

To define the scope of a project

What do P&IDs provide to field construction and inspection personnel during construction?

Reference for proper location and interrelation of components

What do P&IDs serve as for plant operating and engineering staff after construction?

Operational and training reference

Which diagram provides more detail, the P&ID or the PFD?

The P&ID

What information does the P&ID show about equipment orientation?

The order of occurrence of equipment

What do P&IDs serve as for plant operating and engineering staff after construction?

A reference for system functionality

Which instrument in the control loop described in Figure 7 records the tank level?

Level Indicator

What type of signal does the level controller send to the diaphragm-operated level control valve in Figure 7?

Pneumatic

Which diagram includes more detail, the P&ID or the PFD?

P&ID

What type of control system is indicated by the control lines in Figure 7?

Pneumatic control system

Which of the following is NOT typically shown on a P&ID diagram?

Instrumentation symbols

What do P&IDs serve as for plant operating and engineering staff after construction?

A training manual

What is the purpose of a P&ID diagram during the design and pre-construction phases?

To develop cost estimates and bid proposals

What type of signal does the level controller send to the diaphragm-operated level control valve in Figure 7?

Level signal

Study Notes

P&ID vs PFD

  • The P&ID diagram includes more detail than the PFD.

P&ID Details

  • Shows the details of equipment orientation, piping, instrumentation, and control systems.
  • Provides information about equipment orientation.

Purpose of P&IDs

  • In operation, repair, and modification of the plant, P&IDs serve as a guide for operations, maintenance, and engineering staff.
  • During design and pre-construction phases, P&IDs facilitate communication among designers, engineers, and operators.
  • For field construction and inspection personnel during construction, P&IDs provide a detailed guide for installation and inspection.
  • After construction, P&IDs serve as a reference for plant operating and engineering staff.

Control Loop Components

  • In Figure 7, the instrument that senses the tank level is not specified.
  • The level controller sends an electronic signal to the diaphragm-operated level control valve.
  • The instrument that records the tank level is not specified.
  • The control system indicated by the control lines in Figure 7 is a feedback control loop.

P&ID Content

  • Typically includes information about equipment, piping, instrumentation, and control systems.
  • Does not typically show information about civil foundations or building layouts.

Test your knowledge on piping and instrumentation diagrams (P&IDs) with this quiz. Learn about the importance of P&IDs in showing equipment details, piping orientation, and control and instrumentation devices.

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