問題一覧
1
Bilge keels reduce a ship's tendency to roll. Where are bilge keels fitted?
Above the line of the bottom shell and within the breadth of the ship
2
For any given ship's displacement, the volume of water displaced must depend upon the density of water. If a ship moves from sea water into river water without change in displacement, what is the effect on the draught?
Slight increase in draught
3
For what purpose are anchor cable stoppers?
To lock and secure the anchor chain in any position to relieve the load from the windlass
4
If a ship displaces 12,240 cu.mtrs of sea water at a particular draught, what is the corresponding displacement value of the ship?
12,546 MT
5
In still water bending, if the ship's buoyancy amidships exceeds the weight, this may be likened to a beam supported at the center and loaded at the ends. What happens to the ship at this condition?
The ship will hog
6
In still water bending, if the weight amidships exceeds the buoyancy, it is equivalent to a beam supported at its end and loaded at the center. What happens to the ship at this condition?
The ship will sag
7
Undercut, slag inclusion, brittle fracture, and porosity are common faults in welded joints. What is the meaning of 'undercut'?
The edge of the plate in way of the weld side is burned away
8
What is the ship structure that extends from the engine room to the forward hold which allows pipings to be installed beneath the hold for them to be inspected and repaired at anytime?
Duct keel
9
When a mass of cargo is added, removed, or moved longitudinally, the ship's trim changes. At what point on the waterplane or axis about which the trim changes?
Center of floatation
10
Which of the following requirements to ships stability for normal operation corresponds to present regulations? (NSCL 4/12.2)
Unless othereays stated in the approved stability calculation, the total weight of the deck cargo shall not exeed 50 metric tons
11
What is considered as one of the basic objectives of damage control in which an action is undertaken to accomplish emergency repair as quickly as possible or to rectify after occurrence of damage so as to regain a safe margin of stability and buoyancy?
Restoration
12
What considered as one of the basic objectives of damage control in which an action is undertaken to reduce to the lowest level and localize the damage by taking measures to control flooding and preserve stability and buoyancy?
minimization
13
What is the real danger of progressive flooding due to ruptured seawater line in an enclosed compartment?
In time, the pressure within the compartment will gradually get high and cause previously undamaged bulkheads to collapse
14
What is considered as one of the basic objectives of damage control in which all practical preliminary measures are taken, such as, maintaining watertight integrity, providing reserve buoyancy and stability before damage occurs?
prevention
15
What term indicates a curvature of the decks in a longitudinal direction?
sheer
16
Which of the following is an outside area on a vessel's hull from bow to stern between certain waterlines to which special air, water, and grease-resisting paint is applied?
Boot topping
17
Which of the following is a gangplank usually fitted with rollers at the end resting on the wharf to allow for the movement of the vessel with the tide?
brow
18
An intermediate spring is
generally located between the fishplate and the main towing hawser
19
In a longitudinally framed vessel, the longitudinal frames are held in place and supported by athwartship members called
web frames
20
Which factor has the greatest effect on the value of the free surface correction?
The width of the tank
21
When making a turn (course change) on most merchant ships, the vessel will heel outwards if
G is below the center of lateral resistance
22
The difference between the initial trim of a vessel and the trim after anew load condition is known as
change of trim
23
The difference between the forward and the aft drafts of a vessel would be the
trim
24
Yawing is the angular motion of the vessel about what axis?
vertical
25
Angular motion about the vertical axis of a vessel is known as
yaw
26
What is direction of the force called bouyancy under the vessel which is equal to the weight of the displaced water?
upward
27
Which denotes the total force that the vessel or part of the vessel should withstand when floating under a given condition?
load
28
What is known as the total force that the vessel or any part of the vessel should withstand under a given condition?
load
29
What refers to the amount of load which a particular part of the ship structure is subjected? It is usually expressed in kg./sq.cm.?
stress
30
The point beyond which an added stress will produce deformation of material is known as .
elastic limit
31
What is known as the stress due to the unequal distribution of weight?
stress floating light
32
A vessel lists and trim about the
Center of flotation
33
A vessel with a large metacentric height will
be subject to severe racking stresses
34
A wooden plug fitted tightly in the vent of a damaged tank may prevent the tank from
filling completely
35
An inclined ship way having a cradle on wheels that run on rails
Slipways
36
As the curves of GZ plotted in a base of displacement for constant angles of heel:
Cross curves of stability
37
If a ship is supported on the crest of a wave amidships, the vessel is subjected to
hogging stresses
38
Which of the listed initials is used to represent the indicator of initial stability?
GM
39
When the period of a beam seas equals the natural rolling period of a vessel, which of the following will most likely to occur?
excessive rolling
40
When is the best time to safely beach the vessel?
on the falling tide, just after high water high water
41
In a compartment that has been completely flooded, the greatest pressure will be exerted
along the bottom of any bulkhead
42
In general, on what does the position of the center of buoyancy depends?
Draft
43
The moment of a force is a measure of the
instantaneous value of the
44
The point through which the vertical upward support in a floating vessel, is assumed to act is known as the center of ?
gravity
45
The tendency of a vessel to return upright after being inclined by an external force is called
Equilibrium
46
A vessel is subjected to hogging when it
has its bottom plating under tensile stress
47
Displacement refers to the
number of long tons of water is placed by a vessel afloat
48
The location used for loading or anchoring situated partly of territorial sea of a coastal state is called its
roadstead
49
What is a contingency plan for ships?
Plan for safety preparedness
50
What equipment must be on a life float? (small passenger vessel regulations)
Two paddles, a light, painter, lifeline and pendants
51
Which of the following statements concerning immersion suits is correct?
The suits provide for limited body movement such as walking, climbing a ladder, and picking up small objects like a pencil.
52
The external floatation bladder on an immersion suit should be inflated
after you enter the water
53
Which of the following statements is TRUE concerning lifejackets?
Kapok lifejackets must have plastic- covered pad inserts.
54
Which of the following statements concerning immersion suits is correct?
During the annual maintenance, the front zipper should be lubricated with paraffin or beeswax.
55
Which of the following statements concerning immersion suits is correct
After purchasing, the suit should be stowed in the storage bag in which it was received.
56
You are proceeding of the area of reported distress. When you arrived at the reported position, the vessel in distress is not sighted. What type of search should be conducted?
expanding square
57
You are proceeding to a distress site and expect large numbers of people in the water. Which statement is TRUE?
An inflatable liferaft secured alongside can be an effective boarding station for transfer of survivors from the boats.
58
Which of the following conditions is most likely to cause water hammer in the potable water system?
Rapid closing of a spring closed basin faucet.
59
The most common cause of engine room fires is:
Oil leakage coming in contact with hot
60
An accumulation of hydrogen sulfide gas on a vessel can be dangerous to personnel, it is important to know that this gas is
heavier than air
61
Which one of the following statements is true concerning the gas free status of a compartment?
The gas free status applies as long as the air temperature inside the compartment remains at or below standard room temperature
62
When hydrogen sulfide has been encountered on a VESSEL, or is anticipated, monitoring devices must sound an alarm (differing from the lower concentration alarm) or otherwise warn employees when the concentration of the gas reaches or exceeds how many part
50
63
Fighting an oil rig fire in a watertight compartment with hoses could reduce the stability of the rig by
causing a list due to the water in the compartment
64
Fighting an oil rig fire in the ballast pumproom with hoses would adversely affect the stability of the rig most by
a list caused by water filling the compartment
65
Following an engine room bilge fire which is believed to be extinguished after using a fixed CO2 fire extinguishing system, the investigating team should renter the closed space
via the highest access door and equipped with SCBAs, one hour after the fire is believed extinguished
66
If hydrogen sulfide exposure is anticipated, fixed monitoring devices aboard a VESSEL should have a low level concentration alarm to alert personnel when concentrations of this gas first reach a maximum of
10 ppm
67
How are lifelines attached to a life float?
Securely attached around the outside in bights no longer than three feet
68
The following information must be given on the SART
the MMSI number
69
The number 2 lifeboat on a tanker would be .
forwardmost on the port side
70
The greatest effect on stability occurs from loose liquids flowing.
in and out of a vessel that is holed in a wing tank
71
You have abandoned ship in a life raft. Which of the following actions should you take?
Organize a watch system, post as a lookout, tie up with other survival craft if possible, and stream the sea anchor
72
Which of the following is considered primary life- saving equipment?
Lifeboat
73
A rigid lifesaving device designed for a group of survivors to hold on to while in the water is defined as a
buoyant apparatus
74
Which one of the given requirements regarding survival craft muster and embarkation arrangements corresponds to the present SOLAS regulations?
Muster and embarkation stations shall be readily accessible from accommodation and work areas.
75
The Muster List shall show the duties assigned to members of the crew. Which of the following duties shall be included in the "muster list" according to present regulations?
Closing of watertight doors, fire doors, valves, scuppers, side scuttles, skylights.
76
To disengage a survival craft suspended from the cable above the water, you must pull the safety pin and
pull the hook release handle and use the ratchet bar
77
When a sea anchor is used in landing stern first in a heavy surf, sternway is checked by
slacking the tripping line and towing the sea anchor by the holding line
78
While adrift in an inflatable liferaft in hot, tropical weather
deflating the floor panels may help to cool personnel
79
Preventer bars are fitted on lifeboat releasing gear to prevent.
accidental unhooking when the falls become slack
80
An orage colored smoke signal or detonating luminous signals fired at interval of one minute means
we see you, we will provide help as soon as possible
81
You are tending the lifeline of a person who has entered a compartment wearing a breathing apparatus. How many tugs of the lifeline mean "Are you all right"?
One
82
The steering oar in a lifeboat is
longer than the others and should be lashed to the stern
83
Your vessel has 3 lifeboats on each side. The middle boat on the starboard side is designated as boat number
3
84
Which type of davit is not considered to be a mechanical davit?
Radial
85
A qualified person must be assigned as the second in command of a lifeboat on a MODU if the lifeboat has a capacity of more than:
40 persons
86
According to 46 CFR, the float free link attached to a sea painter on a liferaft shall have a breaking strength of:
All of the above
87
Cartridge-operated dry chemical fire extinguishers used on MODUs, should have the propellant cartridge weighed every:
12 months
88
Concerning immersion suits, which of the following statements is correct?
All models will automatically turn an unconscious person face-up in the water.
89
Every distress signal and self - activated smoke signal must be replaced not later than the marked date of expiration, or from the date of manufacture, not later than
42 months
90
When testing a lifebuoy to a Flotation Test, how much weight should it be suspended from it and how long should it remain floating?
14.5 kgs of iron for a period of 24 hours
91
A 6-men inflatable liferaft shall be carried as far forward as is reasonable and practicable. Where is the best stowing position?
Under the forecastle.
92
Where should you pay particular attention to be able to maintain adequate stability in loading deck cargo?
The vertical distribution of the deck cargo