DPO Blueprint Reading & Interpretation 3

Question 1

On a DP reference system blueprint, a DGPS antenna symbol connected to a junction box with multiple outputs most likely represents:

Accepted Answer

A shared GPS signal distributed to multiple DP computers

Answer

Junction boxes with multiple outputs on reference system drawings indicate signal splitting, allowing one physical sensor to feed several DP controllers for redundancy.

Question 2

In a DP hydraulic thruster blueprint, a relief valve symbol is positioned to:

Accepted Answer

Bypass flow when system pressure exceeds a set limit

Answer

Relief valves open to divert fluid when pressure exceeds the design limit, protecting the hydraulic circuit from overpressure damage.

Question 3

A DP electrical drawing uses the abbreviation 'AMS' next to a switchboard. What does AMS stand for in this context?

Accepted Answer

Alarm Monitoring System

Answer

AMS refers to the Alarm Monitoring System, which supervises vessel machinery and alerts operators to abnormal conditions.

Question 4

On a DP system P&ID, 'FT' adjacent to a flow line with a circle symbol stands for:

Accepted Answer

Flow Transmitter

Answer

FT is the ISA standard tag for Flow Transmitter, a device that measures flow rate and sends a proportional signal to the control system.

Question 5

Which line weight convention is most commonly used in DP electrical blueprints to indicate a main power cable versus a control cable?

Accepted Answer

Power cables are drawn with a thicker or bolder line; control cables are thinner

Answer

Standard electrical drawing practice uses heavier line weights for main power conductors to visually distinguish them from lighter control wiring.

(DPO) Dynamic Positioning Operator Exam Practice Test

(DPO) Dynamic Positioning Operator Exam Practice Test

DPO Blueprint Reading & Interpretation 3