c11

75問 • 1年前

問題一覧

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.

What happens when an unisolated saltwater line leading through a secured compartment has been ruptured and has caused the space to become completely flooded without direct access to the sea?

Progressive flooding

What do you call the weights of the hull, machinery, spare parts and boiler water of a vessel measured in the floating dock after its construction?

Light displacement

What is the ship structure that provides a form of protection in the event of damage to the bottom shell, not intended for cargo, but may be used for the carriage of oil, fuel, fresh water, and water ballast?

Double bottom

What is the shipboard term for 'the mass required to increase the mean draught of a ship by 1 cm?'

Tonne per Centimeter immersion

Where are panting stringers fitted?

Forward of the collision bulkhead

Hatch corners should either be radiused or elliptical. Why is this so?

To reduce material stresses

Penetrations and openings in watertight bulkheads in a vessel of less than 100 gross tons must ______.

Be kept as high and as far inboard as practicable

Your vessel is damaged and partially flooded. It is listing 12° to port and trimmed 8 feet down by the head. It has a long, slow, sluggish roll. Which action should you take first?

Press up and after, slack center line double bottom tank

In ship construction, which strength members act to support the decks ?

Girders

When opening a watertight door to check a compartment suspected of flooding, which of the dogs should you back-off first?

Intact buoyancy is a term used to described ____.

an intact space below the surface of a flooded area

What is the maritime term for the size and strength of structural elements, the dimensions of the ship frames, girders, stiffeners and plates?

Scantlings

Transverse watertight bulkheads serve to separate different types of cargo and to divide tanks and machinery from cargo spaces. What is another important function of watertight bulkhead?

Restricts the volume of water which may enter the vessel if the shell plating is damaged

If the pump capacity exceeds the flooding rate, what must be done first?

The pumping shall be continued, and the pump shall be kept in a permanent stand-by mode and ready for use, at any time.

What type of watertight door moves in a horizontal or vertical motion parallel to the plane of the door?

Sliding type

transversestability calculationsrequires the use of ______.

hydrostatic curves

If a ship will be ballasted to float at draughts of 6.0 M forward and 5.5 M aft, what would be the resulting condition of the ship?

Trim by the head or bow condition

What is the term for the upthrust exerted by the water on the ship?

Buoyancy

SOLAS-approved Type C watertight door is to be kept closed all the time. However, it may be opened during which condition?

When personnel are only passing through the door of the compartment

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.

When is a rudder said to be balanced?

When between 20% and 40% of rudder blade area is forward of the stock

Which ship has the greatest free surface effect such that the storage of cargo has to be accurately planned?

Oil tanker

What is meant by 'flooding to sea level'?

Flooding of a compartment that is open to sea

Your vessel has run aground and is touching bottom for the first one quarter of its length. What is the least desirable method from the standpoint of stability to decrease the bottom pressure?

Pump out water from the fore peak tank

What is termed as the total weight of the ship's hull, machineries, spare parts, boiler water, fresh and ballast including the full weight that can be loaded?

Dead weight ton

Visual inspection, dye penetrant test, ultrasonic testing and magnetic particle testing are what type of checks on welds and metal components?

Non-destructive test

When a vessel has a positive stability, the distance between the line of force through B and the line of force through G is called the ____.

righting arm

What should be observed concerning a ship's watertight integrity?

The ramp in stowed position

What is the ship structure installed around the main engine lube oil sump tank, separating it with other double bottom tanks, mainly for access for engineers in doing inspection of holding down bolts and chalks of main engine?

Cofferdam

For what purpose are anchor cable stoppers?

To lock and secure the anchor chain in any position to relieve the load from the windlass

What structure is consructed in deep tanks for oil fuel or oil cargo in order to avoid damage whenever they have a free surface?

Anti-sloshing bulkheads

Your vessel is damaged with no list, but down by the stern. There is progressive flooding and trim by the stern is increasing. What is the effect on transverse stability after the deck edge at the stern is submerged?

BM decreases from loss of water plane and greater volume

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

What result can be calculated by periodical checking of the soundings of the damaged compartments and comparing it with draft readings?

Water ingress and flooding rate

Why is a bulbous bow fitted at the forward of a ship?

It reduces drag and thus increases the ship's speed.

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

The center of volume of the immersed portion of the hull is called the ____.

center of buoyancy

When is a rudder said to be unbalanced?

When the whole of the rudder blade area is aft of the stock

What major type of flooding in which an intact compartment is not completely flooded and that the deck on which the water rest and bulkheads that surrounds it remain watertight?

Partial flooding

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.

What is the term for 'the mass of the ship which is equal to the mass of the volume of water displaced by the ship when it is floating freely at rest'?

Displacement of the ship

What equipment is needed to hold down steel hatch covers fitted with packing, either manually or hydraulically operated, to ensure watertightness of the cover?

Cleats

Which would not provide extra buoyancy for a vessel with no sheer?

Higher bulwark

Which of the following best describe a spade type rudder?

A rudder which is unsupported at the bottom supported by a gudgeon on a large rudder horn and by the lower end of the stock.

What is the important purpose of solid plates known as bulwarks?

Prevent personnel from falling or being washed overboard

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

What major type of flooding in a compartment that is completely filled from deck to overhead which have taken place due to venting through an air escape, an open scuttle, or a ventilation fitting, and has no other effect than to add weight at the center of gravity of the ship?

Solid flooding

How is the watertight integrity of a bulkhead maintained when an electric cable pipe passes through it?

By fitting a watertight cable gland with neoprene packing

Which of the following is not included in the water tight doors to be met during construction as provided in the "International Load Line Convention"?

Be constructed in watertight plastic material

The kind of local stress that is due to the hammering effect of the fore end of the ship head on to the sea in light condition is the _____.

Pounding

What compartment condition exist when the deck on which the water rest and the bulkheads that surrounds it remain watertight so that water will neither run into nor out of the flooded compartment as the ship rolls?

Intact compartment

If a fire breaks out in the cargo hold upper tween decks of a ship, what dangerous condition may occur in putting out the fire using water which has accumulated?

The stability of the ship will be reduced due to added mass of water and by free surface effect.

Collision bulkhead is a heavyduty watertight bulkhead in the forepart of the vessel to withstand damage after impact from collision. From which part to which part of the vessel does this extends?

From the ship's bottom to the main deck or upper deck

The shearing stress on a ship's structure are usually greatest at _____.

the ship's quarter-length points

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

As per SOLAS Chapter il-1, what is the regulation with regards to power-operated watertight doors?

Watertight doors can be gperated either locally remotely from the bridge.

What term indicates a curvature of the decks in a longitudinaldirection?.

Sheer

The principal action in changing from transit to survival draft in the event of heavy weather threatens is _____.

ballasting

When a ship meets heavy weather and commences heaving and pitching, what is known as the tremendous slamming effect when the fore end re-enters the water?

Pounding

Buoyancy is a measure of the ship's ____.

ability to float

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.

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 occurence of damage so as to regain a safe margin of stability and buoyancy?

Restoration

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

If the cause of severe list is off-center ballast, counter flooding into empty tanks will ____.

decrease list

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.

What is 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

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

Your vessel is damaged and partially flooded. It is listing 12 deg to port and trimmed 8 feet down by the head. It has a long, slow, sluggish roll. Which action should you take first?

Press up an and after, slack, centerline double bottom tank

The water in which a vessel float provides vertical upward support. The point through which this support is assumed to act is known as the center of • ⚫

buoyancy

The local stress that is cause by the head resistance due to the work of the bow in and out in a seaway is called ____.

Panting

If a compartment is capable of preventing the passage of water in any direction under the head of water during intact or damaged condition, the compartment is said to be what?

Watertight

The water in which a vessel float provides vertical upward support. The point through which this support is assumed to act is known as the center of • ⚫

buoyancy

If the amount of water ingress or flooding rate exceeds the available pump capacity, what must be done first?

The compartment must be isolated by closing all watertight access including valves in the piping system.

In order toimprove stability, which of the following should be done?

Fill in ballast

Jeo Clyde Arizo · 111問 · 1年前

111問 • 1年前

Jeo Clyde Arizo

Jeo Clyde Arizo · 76問 · 1年前

76問 • 1年前

Jeo Clyde Arizo

Jeo Clyde Arizo · 158問 · 1年前

158問 • 1年前

Jeo Clyde Arizo

Jeo Clyde Arizo · 402問 · 1年前

402問 • 1年前

Jeo Clyde Arizo

Jeo Clyde Arizo · 152問 · 1年前

152問 • 1年前

Jeo Clyde Arizo

Jeo Clyde Arizo · 145問 · 1年前

145問 • 1年前

Jeo Clyde Arizo

Jeo Clyde Arizo · 127問 · 1年前

127問 • 1年前

Jeo Clyde Arizo

Jeo Clyde Arizo · 179問 · 1年前

179問 • 1年前

Jeo Clyde Arizo

Jeo Clyde Arizo · 115問 · 1年前

115問 • 1年前

Jeo Clyde Arizo

c10

Jeo Clyde Arizo · 133問 · 1年前

c10

133問 • 1年前

Jeo Clyde Arizo

c15

Jeo Clyde Arizo · 100問 · 1年前

c15

100問 • 1年前

Jeo Clyde Arizo

c16

Jeo Clyde Arizo · 150問 · 1年前

c16

150問 • 1年前

Jeo Clyde Arizo

問題一覧

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.

What happens when an unisolated saltwater line leading through a secured compartment has been ruptured and has caused the space to become completely flooded without direct access to the sea?

Progressive flooding

What do you call the weights of the hull, machinery, spare parts and boiler water of a vessel measured in the floating dock after its construction?

Light displacement

Double bottom

What is the shipboard term for 'the mass required to increase the mean draught of a ship by 1 cm?'

Tonne per Centimeter immersion

Where are panting stringers fitted?

Forward of the collision bulkhead

Hatch corners should either be radiused or elliptical. Why is this so?

To reduce material stresses

Penetrations and openings in watertight bulkheads in a vessel of less than 100 gross tons must ______.

Be kept as high and as far inboard as practicable

Your vessel is damaged and partially flooded. It is listing 12° to port and trimmed 8 feet down by the head. It has a long, slow, sluggish roll. Which action should you take first?

Press up and after, slack center line double bottom tank

In ship construction, which strength members act to support the decks ?

Girders

When opening a watertight door to check a compartment suspected of flooding, which of the dogs should you back-off first?

Intact buoyancy is a term used to described ____.

an intact space below the surface of a flooded area

What is the maritime term for the size and strength of structural elements, the dimensions of the ship frames, girders, stiffeners and plates?

Scantlings

Transverse watertight bulkheads serve to separate different types of cargo and to divide tanks and machinery from cargo spaces. What is another important function of watertight bulkhead?

Restricts the volume of water which may enter the vessel if the shell plating is damaged

If the pump capacity exceeds the flooding rate, what must be done first?

The pumping shall be continued, and the pump shall be kept in a permanent stand-by mode and ready for use, at any time.

What type of watertight door moves in a horizontal or vertical motion parallel to the plane of the door?

Sliding type

transversestability calculationsrequires the use of ______.

hydrostatic curves

If a ship will be ballasted to float at draughts of 6.0 M forward and 5.5 M aft, what would be the resulting condition of the ship?

Trim by the head or bow condition

What is the term for the upthrust exerted by the water on the ship?

Buoyancy

SOLAS-approved Type C watertight door is to be kept closed all the time. However, it may be opened during which condition?

When personnel are only passing through the door of the compartment

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.

When is a rudder said to be balanced?

When between 20% and 40% of rudder blade area is forward of the stock

Which ship has the greatest free surface effect such that the storage of cargo has to be accurately planned?

Oil tanker

What is meant by 'flooding to sea level'?

Flooding of a compartment that is open to sea

Your vessel has run aground and is touching bottom for the first one quarter of its length. What is the least desirable method from the standpoint of stability to decrease the bottom pressure?

Pump out water from the fore peak tank

What is termed as the total weight of the ship's hull, machineries, spare parts, boiler water, fresh and ballast including the full weight that can be loaded?

Dead weight ton

Visual inspection, dye penetrant test, ultrasonic testing and magnetic particle testing are what type of checks on welds and metal components?

Non-destructive test

When a vessel has a positive stability, the distance between the line of force through B and the line of force through G is called the ____.

righting arm

What should be observed concerning a ship's watertight integrity?

The ramp in stowed position

Cofferdam

For what purpose are anchor cable stoppers?

To lock and secure the anchor chain in any position to relieve the load from the windlass

What structure is consructed in deep tanks for oil fuel or oil cargo in order to avoid damage whenever they have a free surface?

Anti-sloshing bulkheads

BM decreases from loss of water plane and greater volume

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

What result can be calculated by periodical checking of the soundings of the damaged compartments and comparing it with draft readings?

Water ingress and flooding rate

Why is a bulbous bow fitted at the forward of a ship?

It reduces drag and thus increases the ship's speed.

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

The center of volume of the immersed portion of the hull is called the ____.

center of buoyancy

When is a rudder said to be unbalanced?

When the whole of the rudder blade area is aft of the stock

What major type of flooding in which an intact compartment is not completely flooded and that the deck on which the water rest and bulkheads that surrounds it remain watertight?

Partial flooding

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.

What is the term for 'the mass of the ship which is equal to the mass of the volume of water displaced by the ship when it is floating freely at rest'?

Displacement of the ship

What equipment is needed to hold down steel hatch covers fitted with packing, either manually or hydraulically operated, to ensure watertightness of the cover?

Cleats

Which would not provide extra buoyancy for a vessel with no sheer?

Higher bulwark

Which of the following best describe a spade type rudder?

A rudder which is unsupported at the bottom supported by a gudgeon on a large rudder horn and by the lower end of the stock.

What is the important purpose of solid plates known as bulwarks?

Prevent personnel from falling or being washed overboard

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

Solid flooding

How is the watertight integrity of a bulkhead maintained when an electric cable pipe passes through it?

By fitting a watertight cable gland with neoprene packing

Which of the following is not included in the water tight doors to be met during construction as provided in the "International Load Line Convention"?

Be constructed in watertight plastic material

The kind of local stress that is due to the hammering effect of the fore end of the ship head on to the sea in light condition is the _____.

Pounding

Intact compartment

If a fire breaks out in the cargo hold upper tween decks of a ship, what dangerous condition may occur in putting out the fire using water which has accumulated?

The stability of the ship will be reduced due to added mass of water and by free surface effect.

Collision bulkhead is a heavyduty watertight bulkhead in the forepart of the vessel to withstand damage after impact from collision. From which part to which part of the vessel does this extends?

From the ship's bottom to the main deck or upper deck

The shearing stress on a ship's structure are usually greatest at _____.

the ship's quarter-length points

Slight increase in draught

As per SOLAS Chapter il-1, what is the regulation with regards to power-operated watertight doors?

Watertight doors can be gperated either locally remotely from the bridge.

What term indicates a curvature of the decks in a longitudinaldirection?.

Sheer

The principal action in changing from transit to survival draft in the event of heavy weather threatens is _____.

ballasting

When a ship meets heavy weather and commences heaving and pitching, what is known as the tremendous slamming effect when the fore end re-enters the water?

Pounding

Buoyancy is a measure of the ship's ____.

ability to float

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.

Restoration

Prevention

If the cause of severe list is off-center ballast, counter flooding into empty tanks will ____.

decrease list

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.

Minimization

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

Your vessel is damaged and partially flooded. It is listing 12 deg to port and trimmed 8 feet down by the head. It has a long, slow, sluggish roll. Which action should you take first?

Press up an and after, slack, centerline double bottom tank

The water in which a vessel float provides vertical upward support. The point through which this support is assumed to act is known as the center of • ⚫

buoyancy

The local stress that is cause by the head resistance due to the work of the bow in and out in a seaway is called ____.

Panting

If a compartment is capable of preventing the passage of water in any direction under the head of water during intact or damaged condition, the compartment is said to be what?

Watertight

The water in which a vessel float provides vertical upward support. The point through which this support is assumed to act is known as the center of • ⚫

buoyancy

If the amount of water ingress or flooding rate exceeds the available pump capacity, what must be done first?

The compartment must be isolated by closing all watertight access including valves in the piping system.

In order toimprove stability, which of the following should be done?

Fill in ballast