Shio construction & naval arch aug 2013

SHIP CO AUG 2013

WHAT IS TYPE B-60 VESSEL??

)A vessel is constructed with a steel hull and an aluminum superstructure. Which statement is TRUE?

A)  The aluminum will provide greater resistance to the spread of fire by conduction.

B)  The aluminum structure is usually attached to a steel coaming by a method that insulates the two metals.

C)  If the superstructure is stressed, an aluminum structure requires additional expansion joints to prevent fracture.

D)  The steel at the area of the aluminum-to-steel connection must be closely checked for galvanic corrosion

Find TPC when offset of water plane is as follows:

 Station AP 2 3 4 5 FP

??Breadth (m) 0.9, 1.5, 2.1, 1.6, 0.9, 0.1

Length of water plane is 15 meters.

a) 0.2 b) 0.3 c) 0.4 d)0.5

2) What does D5 mean in shell plating?

Ans: Fourth strake from keel & fifth shell from aft

) Hull plating strakes are generally numbered as

Ans: from keel to deck alphabetically up & aft to forward numerically up

Length=150m, Breadth=30m , draught=10m , Cb=0.84 , Cm=0.92 . A continuous 30m length is added at midship section.Calculate new Cb ______ and Cm _____

a) 0.925

b) 0.9

c) 0.875

d) .85

Find Cwp& TPC. Length = 14m

Station AP1  2  3  4  FP

Breadth (m) 1.0  1.44  1.55  1.33  0.89  0.2

a) 0.56

b) 0.34

c) 0.43

d) 0.65

dry Peak tank is tested by (its an dry peak tank)

a) hose test

b) Filled upto load waterline

c) 2.44m above….

d) none

In- water survey in lieu of a one of the two docking surveys in a 5-year period may be accepted when: A. A.

A. A suitable high resistance paint is applied to the ship???s underwater hull B. The ship is less than 15 years old C. The in-water survey provides all the information required by classification society D. A part of the ship is on fire

Air pipes in tanks are generally located:

A Near filling pipes B Near pump suctions C At the opposite end of filling pipes and/or the highest point in the tank D At the lowest point in the tank

.What is the relation between …Permeability, Relative Density and Stowage Factory?
 

WHAT IS RELATION BETWEEN TPC BRACKISH WATER AND TPC SEAWATER?

) Purpose of bulbous bow

Ans: to improve propulsion efficiency

) Plates used to connect stern frames to flat plate keel are called

a) shoe plate

b) coffin plate

c) stealer plate

d) boss plate

.Better freeing arrangements on tanker decks inform of open rails for 50% of length are provided: 

A. To ensure no seawater gets into the tanks. 

B. Because tankers have less freeboard. 

C. Both A and B

D. None of the above

‎

Relation between CB, CP and CM is 
A. C_P= C_B* C_M; 
B. C_M= C_P* C_B; 
C. C_M* C_P* C_B=1; 
D. C_B= C_P* C_M;

The ship???s model estimates the 

A. 
Hull Frictional Resistance

B.
Hull Wave Making Resistance

C.
All of above

D.
None of above

Wake is defined as 
A. w= (PN- V_S)/V_S ;
B. w= (PN- V_a)/PN; (its nothing but a real slip)
C. w= (PN- V_S)/PN; 
D. w= (PN- V_a)/V_a

No port holes are allowed to be fitted below _% of the ships ____ or ______ mm whichever is greater, above the load water line. 
a) 1, length, 300mm
b) 2.5, breadth , 500mm 
c) 3.5, depth,600mm 
d) 4,summerdraft, 760mm

Table 1	Station	AP	1	2	3	4	5	FP
	?? Breadths	2.5	4.73	5.88	6.0	5.09	3.11	0.0
Table 2	Station	AP	-1	-2	-3
	?? Breadths	2.5	1.88	1.25	0.63

The tables 1 and 2 of a vessel are ?? breadths of water plane between perpendiculars and appendage respectively. The lengths between perpendiculars and appendages are 60m and 7.5m respectively. Find the LCF of the water plane from mid ship.

A. 4.87 m towards ford B. 4.23 m towards ford C. Midship D. 4.04 m towards aft

The surface of each blade of propeller when viewed from aft is known as the __________________
A. Back B. Leading edge C. Trailing edge D. Face

Plates used to connect stern frames to flat plate keel are called:
A. Shoe plates B. Coffin plates C. Stealer plates D. Boss plates

Thickness of strakes of bottom plating is increased in which of the following regions of the ship?
A. Pounding region B. Over 40% of ship???s length amidships C. Over 40% of ships length forward D. Both A and B

Panting arrangements are usually fitted up to __________ percent of ship???s length abaft the stem.
A. 10 B. 20 C. 15 D. 25

Apparent slip is defined as

 A. s= (PN- V_S)/V_S ;

 B. s= (PN- V_a)/PN;

 C. s= (PN- V_S)/PN;

 D. s= (PN- V_a)/V_a ;

4. Most Efficient Pre-Painting Methods…Pickling, Blast cleaning, flame Cleaning, Wire Brushing?

9. Location of Collision Bulkhead? 5-8 % Length of the Ship!

15. Taylor’s Wake Fraction Formula…. ((V-Va)/ V)!

15) types of modern rudder
a) single plate streamline
b) double plate
c)single plate
d) none of above

The cyclic angular motion of a ship about the ford ???aft axis under the action of waves is known as:
A. Pitching B. Yawing C. Rolling D. Heaving