KNOWLEDGE TESTING

Do you consider yourself a DP expert? Try the test below and find out.

To promote a better understanding of all aspects of Dynamic Positioning, Ivar Storvik, Chair of The Knowledge Testing Committee and his committee has developed the following knowledge test

You can either take the test as an online test below, or print out the full test by clicking here. For answers to the test, click here

Select the answer you think is correct form the answer box and hit submit to check whether your are correct. (Note: There are 69 questions in total).

11 A DP system fitted with two gyrocompasses, both are enabled and one is in use by the DP system. The system suddenly alerts you that there is a heading difference between the two compasses. What would you do?
A   Immediately switch over to the other compass
B   Call the for assistance to check out the compasses and wait for the report
C   Compare the two compass readings with the standard (magnetic) compass, to decide which one is giving the correct heading and switch to it.
12 What is a vessel model?
A   100% accurate description of a vessel’s motions
B   A computer algorithm that calculates thruster set point signals.
C   A mathematical description of how the vessel reacts to the forces acting upon it (stimulus).
13 Most modern DP systems have a built in Trainer. What would be one of the requirements to enter the Trainer mode?
A   Ensure DP is in control of the thrusters
B   Ensure DP system is in Stand By Mode
C   Ensure a DP system is in active control of vessel positioning
14 What is required to enable Auto heading while in Joystick mode?
A   Position Reference System input
B   Wind Sensor input
C   Compass input
61 The Coanda effect causes
A   an increase in net thrust by the Bernoulli lowering of pressure on the downstream side of the hull.
B   a decrease in net thrust from change in momentum as propeller wash curves upward on downstream side of the hull.
C   a sometimes dangerous pulsating force from interaction of the propeller blades and the hull.
62 Fixed speed, variable pitch propellers
A   are inherently more efficient at generating thrust at all power levels.
B   are least efficient at full thrust.
C   lose up to thirty percent of full thruster power at low thrust.
63 For a given fixed-pitch propeller, thrust is directly proportional to:
A   Propeller speed.
B   Shaft input power.
C   Shaft torque.
64 One of the main functions of the Power Management System is to:
A   Prevent blackouts.
B   Reduce operator workload.
C   Reduce engine loads.
70 The purpose of wind feed forward is to hold closer position by
A   anticipating the wind force and correcting for it
B   measuring the wind force and providing an opposing thrust
C   providing an opposing thrust calculated from drag coefficients
71 The thrust required to hold vessel position against a wind of ten knots is 12,000 pounds ~ 53.38 kN. Considering wind only, and from the same direction, what thrust would be required at 60 knots?
A   432,000 pounds ~ 1,922 kN
B   360,000 pounds ~ 1,601 kN
C   144,000 pounds ~ 641 kN

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