A.its pressure and temperature are both lowered
B.its pressure and temperature are both raised
C.its pressure is lowered and its temperature is raised
D.its pressure is raised and its temperature is lowered
您可能感兴趣的试卷
你可能感兴趣的试题
A.thermal valve
B.magnetic stop valve
C.bellows valve
D.bimetallic valve
A.high-pressure cutout switch is jammed open
B.low-pressure switch is jammed shut
C.thermal bulb is not operating properly
D.scale trap is clogged
A.in the middle of evaporator coils
B.near the evaporator coil outlet
C.near the evaporator coil inlet
D.on the bottom row of evaporator coils
A.amount of superheat in the vapor leaving the coil
B.amount of superheat in the liquid
C.temperature in the evaporator coils
D.pressure in the evaporator coils
A.stop the refrigerant from flowing
B.force the refrigerant to flow
C.cause the refrigerant pressure to rise
D.cause the refrigerant pressure to fall
A.the expansion valve will move toward the wide open position
B.the expansion valve will move toward the closing position
C.the feeler bulb will conveys the high temperature
D.the superheat degree will raise
A.move in an opening direction
B.move in a closing direction
C.either open or close
D.not move at all
A.help preheat the air for the furnaces
B.help preheat the feedwater
C.protect economizer from excessive heat
D.prevent excessive furnace heat losses
A.the bilges
B.the periscope
C.the water level
D.the oil pressure
A.excess stresses will not be set up in the boiler
B.the decks will not be covered with soot
C.the soot will be swept toward the uptakes
D.there will not be a loss of steam pressure
最新试题
If separating effect is not good, which measure should be taken ()
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?()
The ISPS Code consists of a mandatory section-Part A, which shows()
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?()
() is not installed on the main switchboar.
Using a file without a handle may result in ()
To shut down a diesel engine after it exceeds the set maximum speed,which type of device listed should be used?()
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the()
The treatment of the fuel oils involves storage, heating, filtering and()
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?()