Welcome to the website where you can pass online the CES CBT CD-0345 test on the subject «Hull Structural Strength». Practice like this will help you as a marine specialist improve your knowledge with the help of online studying and appraisal practice. CES based on practical information and marine specialists experience.
CES tests developed for evaluating seaman basic knowledge by Seagull Company (rebranded as «OTG»), is an evaluating online-tool, used for revealing any professional preparation needed in specific fields of knowledge, defined by STCW.
CES tests have proven themselves as good tools for the selection and recruitment process, as well as advancing the level of knowledge of the current officers and crew. Ocean Technologies Group use various subjects for question creation, which includes:
- Crowd and Crisis Management;
- Integrated Navigation System (INS);
- Ballast water management;
- Handling and Stowage;
- Vessel operation management and safety;
- Marine engineering;
- Maintenance and repair, etc.
Current test contains Seagull CES questions on the subject «Hull Structural Strength ». Those questions can be used for competence verification specialist capable of preventing accidental situations related with transporting safety, or also for self-examination.
«Hull Structural Strength» subject includes theoretical and practical information about advanced training for work on any type of vessel. The test is an advanced subject encompassing the principles and applications necessary for ensuring the integrity of ship hulls. This training covers a wide range of vessel types from small crafts to large tankers and bulk carriers. Participants delve into the complex mechanics of stress, strain and fatigue analysis as they relate to hull structures. The curriculum includes studying various construction materials, welding techniques and inspection methods to identify potential weaknesses. Sailors gain expertise in calculating loads, assessing structural capacity and understanding failure modes under different operational conditions. Practical exercises and case studies provide opportunities to apply theoretical knowledge to real-world scenarios. Upon completion, individuals will possess the skills and knowledge required for safe and effective ship design, construction and maintenance.
On this site Crew Evaluation System Test on the subject «Hull Structural Strength » contains 45 questions you need to answer with no possibility to go back to previous question. Therefore, we recommend carefully reading each question and making decision with no hurry. In case you have some difficulty answering, you have also possibility to request a hint.
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Amount of questions: 45.
Right answers marked with this sign .
For a loaded, simply supported beam which ONE of the following statements about compressive and tensile forces is most accurate?
Both the load side and the opposite side are under compression.
The load side is under compression and the opposite side is under tension.
Both the load side and the opposite side are under tension.
The load side is under tension and the opposite side is under compression.
For a loaded, simply supported beam with uneven loading, which ONE of the following statements about the loading of the supports is most accurate?
If the loading is uneven, the support nearest to the load has the greatest force.
Even if the loading is uneven, each support carries equal force.
Even if the loading is uneven, the reactions at each support will be zero.
If the loading is uneven, the support furthest from the load has the greatest force.
For a loaded, simply supported symmetrical beam which ONE of the following statements about the resulting bending stresses is most accurate?
If the beam is symmetrical, the bending stresses are the same throughout any cross-section of the beam.
If the beam is symmetrical, the bending stresses are zero at the outside surfaces and highest along the neutral axis.
If the beam is symmetrical, the bending stresses are highest at the outside surfaces and zero along the neutral axis.
If the beam is symmetrical, the bending stresses are zero throughout any cross-section of the beam.
For an evenly loaded, simply supported beam which ONE of the following statements about the bending stress is most accurate?
The bending stress is greatest half way along the length of the beam.
The bending stress is greatest at each end.
The bending stress is zero half way along the length of the beam.
The ends of the beam cannot move.
What does the abbreviation PMA stand for? Select the ONE correct answer.
Port marine Agencies.
Port marine Authority.
Post-Mooring Activities.
Permanent Means of Access.
What is Block Loading? Select the ONE best answer.
When pairs of holds are fully loaded, with other empty holds between the loaded pairs.
When alternate holds are loaded with high density cargo.
When the cargo is loaded in the form of blocks of material.
When the whole ship is loaded with one batch of cargo.
What is a homogeneous loading pattern? Select the ONE correct answer.
A loading pattern in which pairs of holds are loaded, with empty holds between.
One in which cargo is only loaded in designated holds.
One in which the total amount of cargo is loaded more or less evenly along the length of the ship.
One in which low density cargo completely fills each alternate hold.
What restrictions are usually placed on holds carrying water ballast? Select the ONE best answer.
Holds must not be filled to between 20 % and 90 % capacity.
Holds must be filled to approximately 60 % at all times.
Holds must be filled to between 20 % and 90 % of capacity.
Holds should always be filled to 70 % capacity.
When is it safe to load the tank top with more than the maximum given in the Capacity Plan? Select the ONE correct answer.
If the cargo has a low stowage factor.
If the cargo is trimmed to give a level surface after loading is complete.
If the forecast weather conditions on voyage are good.
Never.
When the distance between wave crests is equal to the length of the ship’s hull, which ONE of the following statements is most accurate?
When the wave crests are fore and aft, they will make the ship tend to sag.
The smallest bending moment caused by the wave motion will be when either the peak or the trough of the wave is at mid-ships.
There will be no overall effect on the hull.
When the wave crests are fore and aft, they will make the ship tend to hog.
Which ONE of the following statements about bending of the hull is most accurate?
When the hull is hogging, the deck will be in compression whilst the keel will be in tension.
When the hull is hogging, the deck will be in tension whilst the keel will be in compression.
When the hull is sagging, the deck and keel will be under tension.
When the hull is sagging, the deck will be under tension whilst the keel will be in compression.
Which ONE of the following statements about corrosion is most accurate?
Corrosion can greatly reduce the strength of the ship.
Corrosion of the hull is relatively unimportant, as there is an allowance for this at the design stage.
No permanent loss of hull strength occurs because of operation in heavy weather.
The strength of the hull always decreases rapidly in service.
Which ONE of the following statements about forces on the hull is most accurate?
Shear forces on the hull will tend to be high if one hold is fully loaded and the next is empty.
Shear forces on the hull will tend to be high if all holds are empty.
Shear forces on the hull will tend to be high if all holds are evenly loaded.
Shear forces on the hull will tend to be low if one hold is fully loaded and the next is empty.
Which ONE of the following statements about forces on the ship’s hull is most accurate?
Panting occurs when the vessel is lifted by the sea and then slams back down on the water.
Pounding damage is most likely at mid-ships.
Panting is the in and out movement of the shell plating due to the variation in water pressure on the shell plating.
Pounding is most likely to occur when the ship is fully loaded.
Which ONE of the following statements about hull inspections is most accurate?
Ship’s crew should regularly inspect the cargo holds, hatch covers and ballast tanks with a view to detecting damage and defects.
Ship’s crew are not allowed to inspect the cargo holds, hatch covers and ballast tanks.
Ship’s crew have insufficient training to inspect the cargo holds, hatch covers and ballast tanks with a view to detecting damage and defects.
There is no need to detect damage and defects between surveys.
Which ONE of the following statements about hull strength is most accurate?
A ship regularly operating in heavy weather will remain as strong as when new if properly maintained.
Fatigue cracking is never related to corrosion.
A ship regularly operating in heavy weather is subject to many stress reversals which lower the strength of the hull.
Small Fatigue cracks will normally be okay until the next dry-dock or survey.
Which ONE of the following statements about sloshing of fluid in tanks is most accurate?
Excessive forces from fluids sloshing in tanks can be prevented by having them between 20 % and 90 % full.
Excessive forces from fluids sloshing in tanks can be prevented by having them only half full.
Excessive forces from fluids sloshing in tanks can only be prevented by having them completely full.
Excessive forces from fluids sloshing in tanks can be prevented by not having them between 20 % and 90 % full.
Which ONE of the following statements about the loads on the hull is most accurate?
Little can be done in heavy weather to reduce the dynamic loads on the hull.
Reducing the dynamic loads on the hull by slowing down or altering course in heavy weather is effective in both increasing safety and maintaining the strength of the vessel.
Reducing the dynamic loads on the hull by slowing down or altering course in heavy weather should only be considered in an emergency for safety reasons.
Static loads on the hull can be reduced by slowing down or altering course.
Which ONE of the following statements about the strength of the hull is most accurate?
Factors such as operation in rough weather and damage from cargo work can greatly reduce the strength of the hull.
Incidental damage from cargo work has no effect on the strength of the hull.
The strength of the ship always decreases rapidly in service.
The strength of the ship never changes much after the building stage.
Which ONE of these IMO publications requires that Bulk Carriers have a loading plan?
SOLAS.
COLREG.
MARPOL.
Load line.
Which of the following most accurately describes a disadvantage of High Tensile Steel used in ship structures?
It is heavier than mild steel.
It is more expensive.
It is more prone to corrosion.
When corrosion occurs, the rate of loss of strength is more than for ordinary mild steel.
Which one of the following best describes why bulk carriers are more prone to corrosion than tankers or container ships?
Bulk carriers suffer much more mechanical damage to coatings due to grab damage and other impacts during loading and discharging.
Bulk carriers are built of lower grades of steel.
Tankers and container ships have higher technology coating systems applied to their cargo carrying spaces.
They spend more time in port.
Which one of the following statements best describes the Enhanced Survey Programme?
More detailed inspections at each ship survey.
Frequent inspections by a Port’s terminal operators.
More frequent inspections of the ship’s structures.
More inspections by Port State inspectors.
With reference to crack formation in the hull structure, which ONE of the following statements is most accurate?
Cracks in hatch coamings are not a significant problem.
Cracks can occur due to fatigue, corrosion, or sharp changes of section.
Cracks occur when the material can no longer withstand compressive forces.
Small cracks often occur and are not a significant problem.
With reference to cracking of the hull structure, which ONE of the following statements is most accurate?
Cracks occur when the material can no longer withstand tensile forces.
Corrosion does not affect whether or not cracks occur.
Cracks occur when the material can no longer withstand compressive forces.
Fatigue does not affect whether or not cracks occur.
With reference to looking for defects in the hull structure around hatch openings, which ONE of the following statements is most accurate?
Hatch openings do not form part of the structure and therefore do not need close inspection.
The deck plating midway along the breadth of the hatch needs close attention as it is prone to cracking.
The deck plating midway along the length of the hatch needs close attention as it is prone to cracking.
The hatch corners and hatch coaming brackets need close attention as they are prone to cracking.
With reference to looking for defects in the hull structure, which ONE of the following statements is most accurate?
Indentations in the side and floor plating of Bulk carriers from cargo work can lead to corrosion and cracking.
Double bottom tanks are not usually subject to corrosion.
Indentations in the side and floor plating of Bulk carriers from cargo work are usually of no great importance.
Large hatch openings on container and bulk vessels do not form part of the structure and therefore do not need close inspection.
With reference to shear forces on a ship’s hull, which ONE of the following statements is most accurate?
Shear forces cause further stress on the hull in addition to that caused by bending.
Shear forces are not significant compared to the stress on the hull caused by bending.
Shear forces cancel out some of the stress on the hull caused by bending.
Shear stress always opposes the stress on the hull caused by bending.
With reference to static and dynamic forces acting on the hull, which ONE of the following statements is most accurate?
Dynamic loads on the vessel are insignificant compared to the weight of cargo and ballast.
High static forces, for instance due to poor cargo loading, mean that the vessel is less safe when operating in heavy weather.
Provided the maximum static loading for the hull has not been exceeded, the vessel should be safe in any weather conditions.
Static forces on the vessel are insignificant compared to sea forces.
With reference to stiffening of side shell plating, which ONE of the following statements is most accurate?
The middle and ends of stiffeners and girders will be subject to the highest bending stress.
Bending stress is equal along the entire length of stiffeners and girders.
The ends of stiffeners and girders will be subject to zero bending stress.
The middle and ends of stiffeners and girders will be subject to zero bending stress.
With reference to the forces acting on the hull, which ONE of the following statements is most accurate?
Dynamic forces are always small compared to static forces.
Static forces tend to cancel out dynamic forces.
Panting, pounding, and sloshing of liquids in tanks are examples of dynamic forces.
The weight of fuel, cargo, fresh water and ballast are examples of dynamic forces.
With reference to the hull structure, which ONE of the following statements is most accurate?
Resistance to buckling depends on the length and cross section of the stiffener or girder.
Buckling can occur in tension or compression.
Resistance to buckling depends only on the cross section of the stiffener or girder.
Resistance to buckling depends only on the length of the stiffener or girder.
With reference to the hull structure, which ONE of the following statements is most accurate?
Fatigue cracking is most likely when the ship is new.
Fatigue is the reduction in strength of a material due to constant high load.
Fatigue is the reduction in strength of a material due to repeated cycles of stress.
If protective coatings are maintained, fatigue will never affect a ship.
With reference to the stress distribution along the length of a ship’s hull subjected to bending, which ONE of the following statements is most accurate?
If the ship is evenly loaded, the bending stresses are at a maximum at mid-length.
If the ship is evenly loaded, the bending stresses are at a maximum fore and aft.
If the ship is evenly loaded, the bending stresses are at a minimum at mid-length.
If the ship is evenly loaded, the bending stresses are equal along the length of the ship.
With reference to the stress distribution of a ship’s hull subjected to bending, which ONE of the following statements is most accurate?
The bending stresses will be equal at the deck, bottom plating and the neutral axis at approximately the midpoint of the side plating.
The bending stresses will be maximum at the deck and bottom plating and reduce towards the neutral axis at approximately the mid-point of the side plating.
The bending stresses will be maximum at the deck plating and reduce to zero at the bottom plating.
The bending stresses will be zero at the deck and bottom plating and increase towards the neutral axis at approximately the mid-point of the side plating.
With reference to water on the deck of a ship, which ONE of the following statements is most accurate?
Sea water coming over the deck will cause downward forces on the ship’s structure and is most likely to affect the fore end of the vessel.
Sea water coming over the deck causes additional buoyancy forces on the ship’s structure.
Sea water coming over the deck has little overall effect on large vessels.
Sea water coming over the deck will cause downward forces on the ship’s structure and is most likely to affect the aft end of the vessel.
With regard to looking for defects in the hull structure, which ONE of the following statements is most accurate?
Connections between parts of the structure are so strong that they rarely fail.
Loss of protective coating above welds is fairly common and of no immediate concern.
Connections between parts of the structure, or changes of section, are common areas to find defects.
Small cracks in shell plating above the waterline are of no concern.
With regard to shear forces acting on the hull, which ONE of the following statements is most accurate?
Shear force is created when there are two parallel, opposite forces, like gravity and buoyancy.
Shear force is created when there are two parallel forces in the same direction, like gravity and buoyancy.
Shear force refers to the horizontal force at the aft part of the vessel.
Shear force refers to the horizontal force at the forward part of the vessel.
With respect to bending stresses on the ship’s hull, which ONE of the following statements is most accurate?
Bending stresses will normally be highest at mid length and half way between the deck and bottom plating levels.
Bending stresses will normally be highest fore and aft and at the deck and bottom plating levels.
Bending stresses will normally be highest in way of the engine room and half way between the deck and bottom plating levels.
Bending stresses will normally be highest at mid length and at the deck and bottom plating levels.
With respect to flat bar cross sections of stiffeners used for the ship’s hull, which ONE of the following statements is most accurate?
Flat bar is relatively poor at resisting buckling.
Flat bar is difficult to apply a protective coating to.
Flat bar is relatively expensive to make.
Flat bar is relatively good at resisting buckling.
With respect to framing types for the ship’s hull, which ONE of the following statements is most accurate?
Combination framing is required on all new oil tankers.
Combination framing uses longitudinal frames and box girders.
Combination framing uses both transverse and longitudinal framing.
Combination framing uses transverse frames and box girders.
With respect to rolling causing stress on the ship’s hull, which ONE of the following statements is most accurate?
Rolling mostly causes stresses in the transverse bulkheads.
Rolling mostly causes stresses at the aft part of the ship.
Rolling mostly causes stresses at the forward part of the ship.
Rolling mostly causes stresses in the longitudinal stiffeners.
With respect to the cross sections of stiffeners used for the ship’s hull, which ONE of the following statements is most accurate?
Angle bar performs better in most situations.
T-profile performs better in most situations.
Flat bar performs better in most situations.
It is difficult to apply protective coatings to Bulb profiles.
With respect to the ship’s hull, which ONE of the following statements is most accurate?
The main purpose of the longitudinal stiffeners is to resist bending.
Longitudinal stiffeners are only used in longer vessels.
Longitudinal stiffeners are only used in shorter vessels.
The main purpose of the transverse frames is to support the deck structure.
With respect to the ship’s hull, which ONE of the following statements is most accurate?
Longitudinal framing tends to be used for longer vessels.
Longitudinal and transverse framing should never be used on the same ship.
Longitudinal framing cannot resist bending stresses.
Transverse framing tends to be used for longer vessels.
