Which of the listed refrigeration system components keeps the refrigerant circulating through the system?（）

A . Develop ductility B . Improve machining qualities C . Relieves stresses D . All of the above

A . Dull black appearance B . Bright appearance C . Thin layer of lacquer D . Thick oily film

A . Stored scripts in the recovery catalog B . Backups that can be deleted from disk C . Backup sets and images copies that are obsolete D . Backups that do not have the AVAILABLE status in the RMAN repository

A . Dehydrators must be used continuously in a refrigeration system B . A 25 ton refrigeration system has the same cooling effect as melting 25 tons of ice in 24 hours C . A thermostatic expansion valve is used to control refrigerated space temperature D . The liquid receiver functions to collect and remove non- condensable gase

A . Wait-to-Restore，Forced Switch，Manual Switch，Lockout of Protection B . Manual Switch，Wait-to-Restore，Lockout of Protection，Forced Switch C . Lockout of Protection，Forced Switch， Manual Switch，Wait-to-Restore D . Lockout of Protection，Manual Switch， Forced Switch，Wait-to-Restore E . Wait-to-Restore，Manual Switch，Forced Switch，Lockout of Protection F . Wait-to-Restore，Manual Switch，Lockout of Protection，Forced Switch

A . Classes A and B B . Classes B and C C . Classes C and D D . Classes A and D

A . backups that can be deleted B . stored scripts in the recovery catalog C . backup sets and image copies that are obsolete D . only the most recent backup sets or image copies E . backups that do not have the AVAILABLE status in RMAN repository

A .  stored scripts in the recovery catalog B .  backups that can be deleted from disk C .  backup sets and image copies are obsolete D .  backups that do not have the AVAILABLE status in the RMAN repository

A . Class "A" B . Class "B" C . Class "C" D . Class "D&quot

A . When heated, it will move proportional to the amount the metal has lengthened or expanded B . The pointer associated with the pyrometer scale can be made to also measure engine RPM C . It can be utilized in exhaust manifolds and heat exchangers interchangeably D . It can indicate temperature at a distant point from the source heat

A . Overcoming sliding friction B . Overcoming rolling friction C . Overcoming fluid friction D . Overcoming oil wedge frictio

A . ACLs monitor the number of bytes and packets. B . Virus detection. C . ACLs dentify interesting traffic for DDR. D . ACLs provide IP route filtering. E . ACLs provide high network availability. F . ACLs classify and organize network traffic.

A . Hydraulic oil B . Lubricating oil C . Diesel oil D . Refrigeration oil

A . Individual statements in a named access list may be deleted. B . They require a numbered range from 1000 to 1099. C . When created, they must be specified as standard or extended. D . They are created with the ip access-list command. E . The entire access list must be deleted before editing. F . They are applied with the ip name-group command.

A . They should always be started with the discharge valve closed B . They should always be started with the discharge valve opened C . A priming pump is always required to flood the impeller suction D . They should always be started with the sealing line valves closed

A . Constant tension mooring winch system B . Hatch cover system C . Watertight door system D . Internal combustion engine hydraulic starter system

A . Piston wrist pin bushing B . turbine bearing C . Spring bearing D . Diesel engine main bearing

A . Expansion valve B . Evaporator C . Drier D . Receiver

A . Open the machine on both ends so as to allow the air and dust to escape B . Be certain that the circuit breaker is opened and tagged on the feeder panel C . Be certain that the air is clean and as dry as possible D . All of the above

A . Lubrication B . Cooling C . Fuel D . Electric ignitio

A . stored scripts in the recovery catalog B . backups that can be deleted from disk C . backup sets and image copies are obsolete D . backups that do not have the AVAILABLE status in the RMAN repository RMAN

A . lsvg -p datavg B . lsvg -l datavg C . lsvg -L datavg D . lsvg -o datavg

A . A power end and fluid end B . A propeller and educator C . A volute and impeller D . A turbine and pisto

A . You can delete individual statements in a named access list B . Named access lists require a numbered range from 1000 to 1099. C . Named access lists must be specified as standard or extended. D . You can use the ip access-list command to create named access lists. E . You cannot delete individual statements in a named access list. F . You can use the ip name-group command to apply named access lists.