A liquid sight flow indicator in a refrigeration system is examined and gas bubbles are noted in motion with the fluid flowThis means （）.
1、A liquid indicator sight glass is usef
A liquid indicator sight glass is useful in determining whether or not a refrigeration system is sufficiently chargedIt is generally located in the（）.Ahigh pressure liquid lineBlow pressure liquid lineChigh pressure vapor lineDlow pressure vapor line
2、The Benguela Current flows in a（）.
The Benguela Current flows in a（）.ASW'ly direction along the NW coast of AfricaBS'ly direction off the East Coast of AustraliaCNW'ly direction along the SW coast of AfricaDSW'ly direction along the SE coast of Greenland
3、A vessel is “in sight” of another vess
A vessel is “in sight” of another vessel when（）.Ashe can be observed by radarBshe can be observed visually from the other vesselCshe can be plotted on radar well enough to determine her headingDher fog signal can be heard
4、A pressure drop in the liquid line of
A pressure drop in the liquid line of a refrigeration system may cause（）Athe solenoid valve to seizeBthe compressor to huntCflash gas to form in the liquid lineDthe expansion valve to freeze ope
5、Reducing the liquid free surfaces in a
Reducing the liquid free surfaces in a vessel reduces the（）.Aroll periodBmetacentric heightCwaterplane areaDvessel's draft
6、Movement of liquid in a tank when a ve
Movement of liquid in a tank when a vessel inclines causes an increase in（）.Arighting armBmetacentric heightCheight of the uncorrected KGDnatural rolling period