The expansion tank for a diesel engine closed cooling system is designed to maintain a constant head on the system and （）.

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• The amount of expansion space to be left in a fuel tank when fuel oil is being received, is determined by the （）.

  A . quantity of fuel to be received B . flash point of the fuel as it is received C . fuel temperature as it is received D . viscosity of the fuel being received

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• Approximately what percent of tank space should be left for expansion of oil due to possible temperature increase?（）

  A . 1% to 3% B . 1% to 2% C . 4% D . 2% to 4%

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• Expansion tank should be used to remove （） from cooling water.

  A . scale B . sludge C . chemicals D . air

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• The expansion valve on a Freon system controls the （）.

  A . superheat of the gas leaving the compressor B . back pressure in the evaporator C . temperature of the icebox D . superheat of the gas leaving the evaporator

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• The sequence of parts in a generally used fuel oil supply system for a main engine is （） (1)tanks in the double bottom (2)centrifuges (3)service tank (4)settling tank (5)viscosity regulator

  A . (1)-(2)-(4)-(3)-(5) B . (1)-(4)-(2)-(3)-(5) C . (1)-(3)-(2)-(4)-(5) D . (1)-(5)-(4)-(2)-(3)

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• A ruptured diaphragm in a thermostatic expansion valve will cause the valve to （）.

  A . open B . close C . remain in its position D . flood the evaporator with refrigerant

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• The Certificate of Inspection of a damaged tank barge has expired. What certificate authorizes the barge to move to a repair facility for repair and inspection?（）

  A . Application for Inspection B . Change of Employment C . Permit to Proceed D . Temporary Certificate of Inspectio

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• Which of the following configuration is valid for expansion drawers on a Power 750 with 2 processor board sinstalled?（）

  A . 3 PCI-e I/O drawers and 1 PCI-X I/O drawer B . 4 PCI-e I/O drawers and 4 RIO-2 I/O drawers C . 2 PCI-e I/O drawers and 4 PCI-x I/O drawers D . 4 PCI-e I/O drawers and 2 PCI-X I/O drawer

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• A feeler or thermal bulb is used for the expansion valve to （）.

  A . detect the temperature B . detect the pressure C . heat the refrigerant D . accelerate the refrigerant

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• （） allows for expansion and water make up in the water cooling system.

  A . A top tank B . A head tank C . A head valve D . A drain tank

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• A bonding cable should be connected for cargo operations aboards a tank vessel as soon as the（）.

  A . cargo has been loaded or discharged B . cargo ghose is connected C . cargo pumps are started D . vessel is ready to handle cargo

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• When preparing a ship for heavy weather，fuel oil day tanks should be（）.

  A . pumped overboard to calm the seas B . drained to the lower hull to reduce free surfaces C . filled to ensure that sufficient fuel oil is available during a lengthy emergency D . partially drained to increase free surfaces in order to reduce motio

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• What is NOT a requirement of the reinspection for a tank barge with a certificate of inspection valid for two years? （）

  A . The reinspection will be made between the fourteenth and sixteenth months B . The inspector shall examine all accessible parts of the vessels's hull C . The inspector shall examine the vessel's machinery as well as equipment D . The scope of the reinspection shall be the same as for the inspection for certification，but in less detail

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• For the purpose of（）tank or hold washings from any vessel，an application shall be made to Harbor Authorities for approval.

  A . discharging B . recircling C . loading D . taking i

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• The bulb for the thermal expansion valve is located（）

  A . in the middle of evaporator coils B . near the evaporator coil outlet C . near the evaporator coil inlet D . on the bottom row of evaporator coil

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• A tank has been sealed and unventilated for a long period of timeWhich of the following conditions does this indicate?（）

  A . The tank is safe to enter B . The tank is especially dangerous to enter C . Carbon monoxide is present D . Water vapor present when the tank was sealed has oxidized

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• Vents are led from the engine to the head tank for the release of （） from the cooling water.

  A . air B . heat C . sludge D . steam

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• A cracked diaphragm in a thermostatic expansion valve will cause the valve to （）.

  A . return to a neutral position B . flood the evaporator C . open D . close

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• An alarm device inserted between the deaerating tank and the expansion tank can notify the on-watching crew that （）

  A . the expansion tank is lack of water B . the expansion tank is over flowing C . there is something wrong with the cooling system D . there is something wrong with the engine

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• Those ship’s tanks that are particularly important for trimming the ship are the（）.

  A . domestics B . settlers C . deeps D . peak

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• 0f the following, the most important consideration for a tank vessel is（）.

  A . GM B . the vertical center of gravity C . the longitudinal center of gravity D . the stress on the hull

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• The main propulsion diesel engine jacket water temperature rises above normal, with the raw water sea suction and the expansion tank water level being normalWhich of the following problems is most likely the cause?（）

  A . Faulty thermostatic bypass valve B . Eroded zinc pencils in the heat exchanger C . Steam formation in the expansion tank D . Excessive leakage from jacket water pump seal

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• What is the reason for the possible expansion of the PC market?

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• I’d like to have a ham sandwich for the main course.

  A．汉堡 B．烤鸭 C．三明治

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