A heated bulkhead has the effect on a hygroscopic commodity of（）.

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• The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.

  A . remain constant along the tubes length B . be greatest in a single pass counter flow heat exchanger C . remain constant throughout the heat exchanger D . vary from section to section through out the heat exchanger

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• Let H （） the quantity of heat which has been converted into mechanical work.

  A . represent B . represents C . representing D . being represented

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• A heated bulkhead has the effect on a hygroscopic commodity of（）.

  A . causing moisture to accumulate against bulkhead B . lowering the vapor pressure of the commodity C . lowering the dew point of the air D . raising the vapor pressure of the commodity

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• When using carbon dioxide to fight a fire on a bulkhead，the CO2 should be applied（）.

  A . first to the bottom of the flaming area，sweeping from side to side，and following the flames upward B . in a circular motion from the middle of the bulkhead outward C . to the top of the flaming area，sweeping from side to side，and working toward the bottom D . in an up-and-down motion from one side of the bulkhead to the other

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• Please arrange（）a surveyor to inspect the damaged bulkhead．

  A . of B . for C . with D . i

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• In a refrigeration system, the refrigerant absorbs the latent heat of vaporization in the（）.

  A . compressor B . condenser C . receiver D . evaporator

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• To anneal a copper gasket, you should heat the gasket（）

  A . and quench it in oil B . cherry red and quench in water C . and let it cool slowly in the air D . and carbonize

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• In order to withstand fluid head pressure on a ship，stiffeners are often attached to the bulkhead（）.

  A . penetrations B . plating C . framing D . bracket

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• The objective of shoring a damaged bulkhead is to（）.

  A . force the warped，bulged，or deformed sections back into place B . support and hold the area in the damaged position C . withstand subsequent additional damage D . make a watertight seal at the damaged area

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• Bulkheads which form part of the tanks on a vessel are stiffened to withstand（）.

  A . deck loads from above B . dynamic forces while afloat C . hydrostatic pressure D . over-pressurizatio

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• The heat required to change a substance from a solid to a liquid while at its freezing temperature, is known as the latent heat of （）.

  A . fusion B . vaporization C . condensation D . sublimatio

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• Damaged bulkheads often take a permanent set which is independent of the panting or bulge caused by water pressure. To control this，you should（）.

  A . install shoring so the shoring supports the damaged bulkheads without pushing on them B . install shoring so that it pushes on the damaged bulkhead while supporting it C . use jacks or chain falls to remove the set before installing shores D . place sandbags by the bulkhead without installing shore

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• Damaged bulkheads often take a permanent set which is independent of the panting or bulge caused by water pressure. To control this, you should（）.

  A . install shoring so the the shoring supports the damaged bulkhead without pushing on them B . install shoring so that it pushes on the damaged bulkhead while supporting it C . use jacks or chain falls to remove the set before installing shores D . place sandbags by the bulkhead without installing shore

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• The rate of heat transfer from a hot region to a cold region is affected most by the （）.

  A . size of the heat sink B . temperature difference between the regions C . size of the heat source D . total heat of the system

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• Bulkheads which from part of the tanks on a vessel are stiffened to withstand（）.

  A . deck loads from above B . dynamic forces while afloat C . hydrostatic pressure D . over-pressurizatio

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• The heat used to change a liquid to a vapor is called （）.

  A . latent heat of fusion B . latent heat of vaporization C . specific heat of vaporization D . latent heat of the ga

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• The latent heat of evaporation is dissipated in the （） in a compression refrigeration system.

  A . evaporator B . condenser C . expansion valve D . compressor

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• The general purpose of a heat exchanger is to （）.

  A . eliminate hot air from the condenser B . maintain steady pressure in a system C . heat, or cool one fluid by means of another fluid D . reduce the engine room temperature in tropical climate

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• The heat generated by a fire will be transferred through a bulkhead or dock, as a result of （）.

  A . conduction B . radiation C . convection D . advectio

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• The spreading of fire as a result of heat being carried through a vessels ventilation system, is an example of heat transfer by （）.

  A . conduction B . convection C . radiation D . windage

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• Of all the extingushing agents listed below, which one has the greatest capacity for heat absorption？______.

  A.Water fog B.Carbon dioxide C.Dry chemical D.Solid stream of water

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• ______ the heat to a simmer and continue to cook for another 8—10 minutes or until most of the water has evaporated.

  A．Turn off B．Turn over C．Turn down D．Turn up

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• In a diesel engine, offers the heat energy directly; works as working medium and changes the heat energy to mechanical energy.

  A.the burning of the fuel; medium shaft B.fuel spray; fresh air C.fuel; fuel spray D.the burning of the fuel; the burned gas mixture

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• From the sentence "he has been able to release the sun's heat that is trapped in things such as wood, coal and oil" we know______.

  A．man can get heat from things like wood, coal and oil B．man cannot get the heat directly from the sun C．only wood, coal and oil have heat D．all the sun's heat is trapped in things

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