DCASE Unit 2 Questions with complete
solution
What are the conditions of critical stability? - correct answers a) Floodable
length exceeded.
b) Neutral or negative GM.
c) Listing to the danger angle (1/2 max righting arm (GZ)).
d) Damage with bad weather.
What is the displacement? - correct answers The weight of the volume of
water displaced by the hull at the waterline (expressed in LT)
What are the stability Reference points? - correct answers M - Metacenter
G - Center of Gravity
B - Center of Buoyancy
K - Keel
*Mother Goose Beats Kids
As the waterline/draft increases, the buoyancy __________. And as the
waterline/draft decreases, the buoyancy ___________? - correct answers
Increases, decreases
B follows the waterline
Adding weight ________ draft.
Removing weight ________draft. - correct answers Increases, decreases
, If a weight is shifted down, G moves ___________.
If a weight is shifted up, G moves ___________. - correct answers Down, Up
G follows a weight shift
G moves _________ weight additions and moves __________ weight
removals. - correct answers towards, away from
As B moves up, M moves ______. - correct answers Down
M moves opposite of B
What is the range for initial stability? - correct answers 0-10 degrees
What is a permanent list? - correct answers A permanent angle of inclination
What are three conditions that can cause a ship to take a permanent list? -
correct answers a) G off center line
b) Negative GM
c) combination of both
What is heel? - correct answers A semi-permanent angle of inclination caused
by external forces (e.g., high speed turns, beam winds, heavy seas)
What are the three conditions of stability and how are they defined? - correct
answers a. Positive - G is below M; Righting moments
solution
What are the conditions of critical stability? - correct answers a) Floodable
length exceeded.
b) Neutral or negative GM.
c) Listing to the danger angle (1/2 max righting arm (GZ)).
d) Damage with bad weather.
What is the displacement? - correct answers The weight of the volume of
water displaced by the hull at the waterline (expressed in LT)
What are the stability Reference points? - correct answers M - Metacenter
G - Center of Gravity
B - Center of Buoyancy
K - Keel
*Mother Goose Beats Kids
As the waterline/draft increases, the buoyancy __________. And as the
waterline/draft decreases, the buoyancy ___________? - correct answers
Increases, decreases
B follows the waterline
Adding weight ________ draft.
Removing weight ________draft. - correct answers Increases, decreases
, If a weight is shifted down, G moves ___________.
If a weight is shifted up, G moves ___________. - correct answers Down, Up
G follows a weight shift
G moves _________ weight additions and moves __________ weight
removals. - correct answers towards, away from
As B moves up, M moves ______. - correct answers Down
M moves opposite of B
What is the range for initial stability? - correct answers 0-10 degrees
What is a permanent list? - correct answers A permanent angle of inclination
What are three conditions that can cause a ship to take a permanent list? -
correct answers a) G off center line
b) Negative GM
c) combination of both
What is heel? - correct answers A semi-permanent angle of inclination caused
by external forces (e.g., high speed turns, beam winds, heavy seas)
What are the three conditions of stability and how are they defined? - correct
answers a. Positive - G is below M; Righting moments
