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额定功率密度 rated power density
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Compared to a constant pitch propeller, a controllable pitch propellerA.more efficiently uses available engine powerB.operates at a lower efficiency at a fixed speedC.produces the same torque at lower engine powerD.develops its rated power at a lower speed
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The power factor of an AC generator operating singularly is determined by the_______ .A.connected loadB.prime mover speedC.field excitationD.generator's rated voltage
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Which of the following can occur if the maximum rated load is exceeded on an uninterruptible power supply (UPS)?()
A. There is a fire hazard potential if a power outage occurs.B. The last system plugged into the UPS will not be provided any power.C. The UPS will draw more power from the circuit to compensate.D. The runtime of the UPS will be insufficient if a power outage occurs.
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An administrator installs new IDE drives into the company server. Upon starting the machine， the BIOS does not recognize any of the drives. Which of the following is the MOST likely cause of the problem？（）A、The jumpers are not set correctly on the drives.B、The power supply is not rated high enough to support the additional drives.C、The BIOS is not compatible with the drives.D、The drives are not powered on.
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A military member has just returned to the United States from Europe and reports their personaldesktop computer does not work. Which of the following is the MOST logical solution to thisproblem?（）A、The computer is unable to work in the US because of EU licensing arrangementsB、The power supply needs to be replaced with one rated for 110 wattsC、The power supply needs a power inverter to handle the change in cyclesD、The power supply voltage needs to be switched to 110 from 220
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Which of the following can occur if the maximum rated load is exceeded on an uninterruptible power supply （UPS）？（）A、 There is a fire hazard potential if a power outage occurs.B、 The last system plugged into the UPS will not be provided any power.C、 The UPS will draw more power from the circuit to compensate.D、 The runtime of the UPS will be insufficient if a power outage occurs.
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When selling against competition, which of the following focus on the iDataPlex value proposition? （）A、Superior chip density B、Balance performance, cost, and power+cooling efficiency C、Flexible configurations ready for integration and testing at the customers data center D、Standard rack mounting
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Which of the following solutions provides maximum core density per rack?（）A、Power 730B、PS700 BladesC、PS702 BladesD、PS703 Blades
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单选题A current will develop between areas of different density in ocean waters. If you face in the same direction the current is flowing，the water of（）.A
high density will be on the left in the Northern HemisphereB
high density will be on the right in the Southern HemisphereC
low density will be on the left in the Northern HemisphereD
low density will be on the left in the Southern Hemisphere
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单选题The function of the after-cooler installed between the turbocharger and intake manifold on some diesel engine, is to （）A
increase the density of the intake airB
decrease turbocharger power usageC
reduce exhaust gas temperatureD
compensate for turbocharger PRM fluctuations
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单选题The power factor of an AC generator operating singularly is determined by the （）A
connected loadB
prime mover speedC
field excitationD
generators rated voltage
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单选题The power factor at which a paralleled AC generator operates is usually adjusted by the （）.A
connected loadB
prime mover speedC
field excitationD
generators rated voltage
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单选题When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?（）A
During operation at low speedB
During operation at rated speed, but low power outputC
During accelerationD
All of the above
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单选题Which of the following are three areas that favor IBMs position in Web2.0 computing?（）A
Acquisition cost, speed and density B
High performance processors, cooling and reliability C
Power, cooling and density D
Acquisition cost, density and reliability
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单选题Compared to a constant pitch propeller, a controllable pitch propeller（）.A
more efficiently uses available engine powerB
operates at a lower efficiency at a fixed speedC
produces the same torque at lower engine powerD
develops its rated power at a lower speed
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单选题Power transformers are rated in （）.A
kilowattsB
ampere-turnsC
kilowatt-voltsD
kilovolt-amperes
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单选题A military member has just returned to the United States from Europe and reports their personaldesktop computer does not work. Which of the following is the MOST logical solution to thisproblem?（）A
The computer is unable to work in the US because of EU licensing arrangementsB
The power supply needs to be replaced with one rated for 110 wattsC
The power supply needs a power inverter to handle the change in cyclesD
The power supply voltage needs to be switched to 110 from 220
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单选题An administrator installs new IDE drives into the company server. Upon starting the machine， the BIOS does not recognize any of the drives. Which of the following is the MOST likely cause of the problem？（）A
The jumpers are not set correctly on the drives.B
The power supply is not rated high enough to support the additional drives.C
The BIOS is not compatible with the drives.D
The drives are not powered on.
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单选题One of the causes of ocean currents is density differences in the water. This is true because （）.A
in an area of high density the water's surface is lower than in an area of low densityB
surface water flows from an area of high density to one of low densityC
the lesser the density gradient the freer the water is to moveD
it is the density differences that cause the currents to stay in the troughs
考题
单选题Which of the following can occur if the maximum rated load is exceeded on an uninterruptible power supply (UPS)?（）A
There is a fire hazard potential if a power outage occurs.B
The last system plugged into the UPS will not be provided any power.C
The UPS will draw more power from the circuit to compensate.D
The runtime of the UPS will be insufficient if a power outage occurs.
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单选题The power output of a turbocharged diesel engine will drop if the cooling water flow through the after-cooler is interrupted because the （）.A
turbocharger stallsB
exhaust pressure increasesC
air charge density decreasesD
scavenge effect increases
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