The unloading system on an air compressor will （）...

第1题

[单选题] In a refrigeration system, which of the following statements describes the actions occurring when a solenoid valves, used in conjunction with an unloader head is energized?（）

A、The solenoid valves directs high pressure gas to the valve lifting device raising the suction valve off its seat and causing one specific cylinder to become unloaded B、The solenoid valves directs high pressure gas to the underside of the unloading piston, causing it to rise and allowing the recirculating ports to be opened C、When the solenoid valve becomes energized, the valve ports become closed, allowing discharge pressure to build up above the piston, shifting it and causing it to unload D、The solenoid valve allows the refrigerant to pass from the suction chamber to the top of the unloader piston, causing the piston to lift and unload the cylinder

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第2题

[单选题] Adequate attention must be given to the water cooling system of the air compressors, for （） can cause condensation on the cylinder walls.

A、overcooling B、poor cooling C、overloading D、unloading

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第3题

[单选题] A ship is responsible for the cargo loaded or unloaded（）.

A、only when the cargo is within its rail B、after the cargo is checked by tallymen C、as soon as the cargo loading or unloading begins D、during the time when loading or unloading is going on

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第4题

[单选题] The port State control officer will ensure that（）is performed by all crude carriers either required to have a crude oil washing system or where the owner or operator chooses to install a crude oil washing system.

A、cargo loading operations B、cargo unloading operations C、cargo control operations in the transport D、crude oil washing

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第5题

[单选题] Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?（）

A、Pressure-reducing valve B、Unloading valve C、Counterbalance valve D、Pressure-relief valve

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第6题

[单选题] Air compressors are equipped with unloading systems for the purpose of（）.

A、removing all but the frictional load during starting B、relieving intercoolers of high temperature buildups C、providing high starting torque in the drive motor D、seating valve plates during compressor shutdown

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第7题

[多选题] You write a logging function for a Web Form. You call the logging function from the Page_Unload event handler. You test the Web Form and notice that the Page_Unload event handler does not call the logging function. You need to ensure that the logging function is called. What are two possible ways to achieve this goal? （）

A、Set the Page attribute to AutoEventWireup="False". Remove the attribute onunload="Page_Unload" from the Web Form element. B、Set the Page attribute to AutoEventWireup="False". Add the attribute OnUnload="Page_Unload" to the Web Form element. C、Set the Page attribute to AutoEventWireup="False". Add the Web Form attribute autocomplete=on. D、Set the Page attribute to AutoEventWireup="True".

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第8题

[多选题] You write a logging function for a Web Form. You call the logging function from the Page_Unload event handler. You test the Web Form and notice that the Page_Unload event handler does not call the logging function. You need to ensure that the logging function is called. What are two possible ways to achieve this goal? （）

A、Set the Page attribute to AutoEventWireup="False". Remove the attribute onunload="Page_Unload" from the Web Form element. B、Set the Page attribute to AutoEventWireup="False". Add the attribute OnUnload="Page_Unload" to the Web Form element. C、Set the Page attribute to AutoEventWireup="False". Add the Web Form attribute autocomplete=on. D、Set the Page attribute to AutoEventWireup="True".

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第9题

[单选题] The ship will be responsible for the cargo loaded or unloaded（）.

A、only when the cargo is within its rail B、during the time when loading or unloading is going on C、after the cargo is checked by tallymen D、as soon as loading or discharging begins

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The unloading system on an air compressor will （）.

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