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单选题
Which of the following statements describes the function of an expansion tank in a diesel engine cooling system?（）
A
Maintains a constant head on the system
B
Reduces the likelihood of air or steam pockets formation
C
Provides a low pressure point for the addition of makeup cooling water
D
All of the above
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Which of the following BEST describes the function of a redundant power supply？（）A、 Provides additional diagnostic LEDsB、 Reduces power consumptionC、 Eliminates a single point of failureD、 Reduces total cost of ownership
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单选题Which of the following statements describes the function of an expansion tank in a diesel engine cooling system?（）A
Maintains a constant head on the systemB
Reduces the likelihood of air or steam pockets formationC
Provides a low pressure point for the addition of makeup cooling waterD
All of the above
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单选题Which of the following statements describes the function of an air compressor intake filter?（）A
Protects against suction valve floatB
Provides a positive pressure on the air inlet valvesC
Prevents lubricating oil contamination of the compressed air supplyD
Protects against the damaging effects of airborne solid particles
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单选题If the turbocharger of a four-stroke/cycle diesel engine fails to operate, which of the following statements best describes the probable effect?（）A
Intake manifold pressure will be highB
Intake manifold pressure will be unaffectedC
Exhaust temperatures will be highD
Exhaust temperatures will be low
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单选题Which of the following best describes a hash function？（）A
An irreversible fast encryption methodB
A reversible fast encryption methodC
A reversible value computed from a piece of data and used to detect modificationsD
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单选题The amount of fuel delivered for each cycle must be in accordance with the engine load, and the same quantity of fuel must be delivered to each cylinder for each power stroke at that load.Which of the following statements describes this requirement?（）A
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Accurate meteringC
Suitable injection rateD
Suitable atomization rate
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单选题Which of the following BEST describes the function of a redundant power supply？（）A
Provides additional diagnostic LEDsB
Reduces power consumptionC
Eliminates a single point of failureD
Reduces total cost of ownership
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Dissipate heatB
Trap foreign matterC
Separate air from the oilD
All of the above
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Liquids with different viscosities will always have the same specific gravityB
Liquids with different viscosities will never have the same specific gravityC
Viscosity and specific gravity are directly proportionalD
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单选题Which of the following statements best describes a Pre-sales Solution Assurance Review？（）A
An account team proposal reviewB
An installation planning meetingC
A solution design development methodologyD
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It is a teaching guideB
It is a blueprint to be strictly followedC
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