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The emergency generator or emergency battery is connected to（） on most large ships.
A、the capstan
B、the collector
C、the panels
D、the surface
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A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a （）
A、the use of a poor quality oil
B、the deterioration of its properties
C、the formation of deposits
D、the reduction in heat transfer ability
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When running a large, low-speed, main propulsion diesel engine on heavy fuel, which of the following precautions should be observed when switching back over to diesel oil?（）
A . The diesel oil must never be allowed to mix with the heavy fuel
B . The temperature of the fuel from the pre–heater should be gradually reduced after switching over the three–way valve
C . The heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valve
D . The heating steam must be secured before the diesel oil passes through the three-way valve
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During maneuvering operations for a direct reversing large, low-speed, main propulsion diesel engine, which of the following actions is used to stop the shaft from turning prior to reversing the engine rotation?（）
A . Flywheel inertia
B . Admission of starting air
C . The way of the vessel
D . securing of fuel to the cylinder
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A large oil fire on the deck of a ship can be fought most effectively with（）.
A . dry chemical
B . foam
C . high-velocity fog
D . water
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A customer is experiencing a performance bottleneck in a disk subsystem. The server is performing sequential I/O with a small number of users requesting large files. Which of the following would most likely resolve the bottleneck？（）
A . Increase seek translation
B . Increase data transfer rate
C . Decrease rotational latency
D . Increase rotational latency
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Small， medium， and large businesses today are increasingly using "Green" products within their IT Environments. What are the most significant factors propelling this change？（）
A . Government regulation and environmental effects
B . Cost of power consumption and environment effects
C . Government regulation and cost of power consumption
D . Environmental effects and low cost of product
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After using the alt_disk_install command to clone a system image to another disk, the system administrator noticed a large number of defined devices not allocated to the LPAR. Which of the following is the most likely cause of this situation?（）
A . The cfgmgr command was not run to reconfigure the devices
B . The machine was not booted into SMS MultiBoot mode after configuration
C . The machine was not in full system partition mode when the volume was created
D . The alt_disk_install command was not run with the -O option to remove references in the ODM
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The opening of an exhaust valve on a modem, large, low-speed, main propulsion diesel engine may be actuated by （）.
A . direct action of cam shaft
B . compressed air pressure
C . hydraulic “push rods”
D . direct action of the main piston moving dow
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A large, low-speed, main propulsion diesel engine uses sea water to directly cool the （）.
A . cylinder heads
B . exhaust valves
C . scavenging air
D . injector
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（） can be found on most medium to large merchant vessels even if the main engine is either a steam turbine or 2-stroke crosshead engine.
A . The medium speed 4-stroke trunk piston engine
B . The low speed 2-stroke crosshead engine
C . The medium speed 2-stroke crosshead engine
D . The low speed 4-stroke trunk piston engine
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You have a large amount of historical data in an operating system file. Some analysts in your organization need to query this data. The file is too large to load into your current database. Which is the most effective method to accomplish the task？（）
A . Upgrade the hardware/memory to accommodate the data.
B . Load the data into your database by using the PARALLEL clause.
C . Give analysts DBA privilege， so that they can query DBA_EXTERNAL_TABLES.
D . Use an external table so you can have the metadata available in your database， but leave the data in the operating system files.
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As a Network Engineer in a large-sized company, you have to master the knowledge of the Cisco mobility solution. Which of the following statement most appropriately identifies the characteristics of it?（）
A . It provides high-level integrated security from the wireless access point to the client and automatically encrypts voice and data in transit.
B . It allows you to centralize management, automate repetitive tasks, and provision IP services easily.
C . It centralizes your infrastructure and allows you to share resources more effectively by combining separate data centers into an interconnected SAN.
D . It authenticates users and devices so that it is impossible for a rogue device to be connected to the network.
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On a large low-speed main propulsion diesel engine, lower main bearing wear is usually measured by using a/an （）
A . dial indicator
B . outside caliper
C . bridge gauge
D . tram rod
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Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of （）.
A . fuel oil vapor at the sludge tank vent
B . unburned fuel vapors in the scavenge air receiver
C . lube oil vapors in the crank case
D . lube oil vapors in the engine room
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One of your customer has six sites， three of which process a large amount of traffic among them.He plans to grow the number of sites in the future. Which is the most appropriate design topology？（）
A . full mesh
B . peer-to-peer
C . partial mesh
D . hub and spoke
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In a large, low-speed diesel engine the clearance between the piston crown and cylinder head is found to be excessiveIn order to correct for this, you should（）
A . build up the piston crown by metal spraying
B . build up the cylinder head by metal spraying
C . insert shims between the crankpin bearing box and the connecting rod foot
D . install a thinner head gasket
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Which of the listed types of starting systems is often used on large, low-speed, direct reversing, main propulsion diesel engines?（）
A . Electric
B . Hydraulic
C . Air
D . All of the above
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While underway, which of the following would be the FIRST step in reversing a direct reversing large, low-speed, main propulsion, diesel engine?（）
A . Manually trip the over-speed device
B . Interrupt the fuel flow to the engine
C . Disengage the safety interlock
D . Slide the camshaft to the neutral positio
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If it becomes necessary to cutout an individual cylinder of a large, low-speed, main propulsion diesel engine, the fuel to that cylinder should be secured and its （）
A . fuel pump should be removed and all connections blanked off
B . cylinder oil feed rate should be increased slightly above that used at normal sea speed
C . cylinder oil feed rate should be reduced
D . cylinder oil feed rate should be increased to the maximum flow capable of the metering pum
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Which of the following is a large factor on college applications, could be considered the most important by some?
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There was no way to measure strength of the earthquake that killed the most people because the Richter Scale wasn't large enough to measure it.
A．Y
B．N
C．NG
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Millions of stars are traveling about in space. A few form. groups which journey together, but most of them travel alone. And they travel through a universe so large that one star seldom comes near to another.
We believe, however, that some two thousand million years ago, another star wandering through space, happened to come near our sun. Just as the sun and the moon raise tides on the earth, so this star must have raised tides on the surface of the sun. But they were very different from the small tides that are raised in our oceans; a large tidal wave' must have travelled over the surface of the sun, at last forming a mountain so high that we cannot imagine it. As the cause of the disturbance (动荡) came nearer, so the mountain rose higher and higher. And before the star began to move away again, its tidal pull had become so powerful that this mountain was torn to pieces and threw off small parts of itself into space. These small pieces have been going round the sun ever since. They are the planets (行星).
Millions of stars are______.
A．following a regular path in space
B．always travelling together
C．seldom wandering about in the universe
D．moving about without a fixed course
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Most scientists and engineers find careers in three general sectors of society: colleges and universities, industries, and federal and stale agencies. Their work includes an array of activities, from the conduct of basic and applied research to the design and application of new commercial products to the operation and maintenance of large engineering systems.
You can make your planning more effective by appreciating the direction in which professional careers are shifting within that larger picture.【66】But more than half the students who receive PhDs in science and engineering obtain work outside academe—a proportion that has increased steadily for 2 decades. And full-time academic positions in general are more difficult to find than they were during the 1960s and 1970s, when the research enterprise was expanding more rapidly.
【67】The end of the Cold War has removed some incentive for the federal government to fund defense-oriented basic research. Increased national and global competition has forced many industries to reduce expenses and staff. That means that there are fewer research and development positions in universities, industries, and government laboratories than there are qualified scientists and engineers looking for them.
【68】For example, there are strong public pressures for universities to shift their emphasis toward teaching and toward undergraduate education; the number of positions for permanent faculty has decreased; professors are no longer required to retire at a particular age; and more part-time and temporary faculty are being employed.【69】In engineering, careers are being transformed by several intersecting trends.【70】Companies value multilingual workers with a breadth of competencies—managerial as well as technical—and the ability to access and apply new scientific and technologic knowledge. The more flexible and mobile you can be, the more opportunities you will have and the greater will be your control over the shape of your career.
A. Powerful changes have swept through the universities.
B. All those trends 'affect the universities' ability to hire scientists and engineers.
C. For example, increasing numbers of physicists, mathematicians, and engineers find their skills valued in the financial arena.
D. International companies now draw employees from many nations, seeking out valued experts from a global pool of labor to work project by project.
E. For example, for many students, a PhD will mean a career as an academic researcher.
F. As our society changes, so too do the opportunities for careers in science and engineering.
(66)
