Question92:-During propeller open water test, it is necessary to measure the following:
A:-Tow force on the open water boat
B:-Propeller thrust
C:-Towing speed
0:-{2) 2१५ {3}
Correct Answer:- Option-D

Question93:-A 5 bladed overlapping propeller is kept on a table with its face pointing up. Its outline is then drawn on the
table. The resulting shape will be the of the blade.

A:-Developed area
B:-Expanded area
C:-Projected area
D:-None of the above

Correct Answer:- Option-D
Question94:-Consider a straight line in XY plane parallel to X axis. Take three coordinates in this line i.e. {(-6.0, 1.0, 0.0),
(0.0, 1.0, 0.0), (6.0, 1.0, 0.0}} in meters. Consider that this line is the chord of a controllable pitch propeller blade section at
radius 7.5 m at 0° pitch angle. Wrap this chord along a cylinder of radius 7.5 m. The centre of cylinder is: (0, 1, -7.5). The
coordinates of the point (0, 1.0, 0.0) do not change. The coordinates of the other two points will be:

A:-X: 53802, Y:1.0, Z:-2.2747;
೫: -5.3802, 1: 1.0, 2: -2.2747

0.3802, Y:-1.0, Z:2.2747;
X:-0.3802, Y: -1.0, Z:2.2747

D:-None of the above
Correct Answer:- Option-A

Question95:-The stability of a rectangular barge will after its double bottom is damaged. The double bottom
height is much lower than the intact water line and waterplane remains intact after the double bottom damage.
A:-Increase
B:-Decrease

C:-Not change
D:-None of the above
Correct Answer:- Option-A
Question96:-The propeller open water efficiency *(eta_0)" is defined as follows:
A {T_O*V A}{2PinQO}
B:-*{K_{TO} *J}/{2 മിലാ”
ടേ ലിനു
D:-(1) and (2)
Correct Answer:- Option-B
Question97:-Following parameter can be varied णि चे controllable pitch propeller:
A:-Propeller pitch
B:-Propeller chord
C:-Propeller diameter
0:-{1}, (2) चाध {3}
Correct Answer:- Option-A
Question98:-Following parameter can be varied in a fixed pitch propeller:
A:-Propeller pitch
B:-Propeller chord
C:-Propeller diameter
D:-None of the above
Correct Answer:- Option-D

Question99:-For computing propeller mass and the mass moment of inertia about the rotation axis, following parameters
are essential:

A:-Section area of the propeller blade
B:-Propeller power
C:-Propeller pm
D:-None of the above
Correct Answer:- Option-A
Question100:-The following is one of the design criteria for preventing forward bottom slamming:
A:-Waterplane area
B:-Yield stress of mild steel