Question84:-During a sway harmonic test, the hydrodynamic sway force and the ship speed are measured. Assume sway
force and sway motion as *Y_H=Y_{dotv} ™* dotv + Y v * v + Y {text{vwv}} है (v}*3" and'y" (in meters) ‘= A ¥
sin ({2pi}/{T} t) respectively. The camiage moves ahead at uniform speed *u” during the test. To determine *Y_{dotv} ,
Y v and Y_{text{vwv}}" following analysis is required:

A:-Conformal mapping

B:-Impulse response analysis

C:-Broaching

D:-Fourier analysis

Correct Answer:- Option-D
Question85:-The sway + yaw coupled oscillation at steady forward speed is given below.

“ஙா ன) 11-0௫ (ண) (60) 23 ணா "({dotv').{dotr}}
+[[(-४ ४), -11.[-4' றி ராட்டி று மா 0) 4 ங.௫ (4௧0) டல)
A:-The equation is linear
B:-The equation is nonlinear
C:-The equation is coupled
D:-(1) and (3)
Correct Answer:- Option-D
Question86:-For the ship rolling motion equation: *(I'_{text{xx}}+A' {44}) ddotphi' + b'_{44} dotphi' + C*_{44}phi=0"
: {44} :Added mass moment of inertia in the roll axis direction
B:-'b*_{44}" : roll damping
C:-*C'_{44)" : Restoring moment coefficient
0:-{1}, (2) चाध (3)
Correct Answer:- Option-D

Question87:-To transform the body fixed dynamics of a surface ship `ಟ, ೪' and 'r* (surge speed, sway speed and yawing
rate) to the NED (North East Down}) coordinate system the following parameter is required.

A:-Roll angle

B:-Pitch angle

C:-Heading angle

D:-None of the above

Correct Answer:- Option-C
Question88:-Determine the inertia tensor {matrix} about the coordinate centre for a unit which consists of two small
particles, each of mass *m* , connected by the light but rigid slender rods. Each one of the particle is attached at the
forward and aft end of the rod at a distance of *(I, 0, 0 mand (1.0. 0 m from the coordinate centre.

A:-*([0,0,01,[0,2ml~2,01,[0,0,2mI~2])"

B:-*([2ml~2,0,01,[0,0,01[0,0,2mI~2])*

C:-*([0,mI~2,0],[mI~2,0,01,[0,0,01)*

D:-*([0,0,01,[0,2mlI~2,2mI*2],[0,2miI*2,2mi~ 2]y

Correct Answer:- Option-A
Question89:-Determine the center of the circle and its radius given by the equation:

`3^2 + #^2 - 46 +6 ‏7-3و‎ 20“
A:-Centre (2, -3), Radius: 4
B:-Centre (-3, 2), Radius: 8
C:-Centre (-3, 2), Radius: 2
D:-None of the above
Correct Answer:- Option-A

Question90:-A pulley driving a belt has a diameter of 300 mm and is tuming at 2700/ pi* revolutions per minute. Find the
angular velocity of the pulley and the linear velocity of the belt assuming that no slip occurs.

A:-‘omega’ = 45 rad/sec, 'ഴ് ട 6.5 m/sec
B:-‘omega’ = 90 rad/sec, ۷۴ ‏ے‎ 13.5 m/sec
C:-"omega’ = 13.5 rad/sec, v’ = 90 m/sec
D:-None of the above

Correct Answer:- Option-B

Question91:-A towing carriage is travelling at 4.0 m/s and has wheels of diameter 1000 mm. Assume no slipping of wheel
oceurs. Determine the angular velocity of the wheels.

A:-76.4 ۳

8:-358.9 ಗಾಗಾ

C:-716.2 rpm

D:-25 ಗಾಗಾ

Correct Answer:- Option-A