In a flash type evaporator, all saltwater heaters are vented through individual vent cocks to the ______.

A . first stage flash chamber B . second stage flash chamber C . first stage after condenser D . second stage distilling condenser

A . vaporize, with the un-flashed water remaining at the temperature at which it entered the flash chamber B . vaporize, with the un-flashed eater equalizing to the saturation conditions existing in the f lash chamber C . vaporize, with the remaining water a t a temperature greater than it entered the flash chamber D . boil, allowing steam bubbles to rise through the brine at the bottom of the flash chamber

A . high-pressure steam-driven air-ejector B . motor-driven vacuum pump C . water-motivated air eductor D . centrifuge pum

A . deaerate the first effect distillate B . filter the condensed flash vapors C . deaerate the first and second effect distillate D . remove small water droplets entrained in the flashed vapor

A . second stage feed heater B . saltwater feed heater C . distillate cooler D . second stage vapor separator

A . high temperature distillate can be re- circulated to induce additional flashing B . scale formation is not a severe problem C . cold shocking is more effective in removing scale D . water purity is greatly increased at high capacity

A . lowering brine discharge density B . decreasing the absolute pressure of each stage C . increasing the saltwater feed heater temperature D . increasing the pressure at the spray pipe

A . combined as part of the salt water feed heater B . the open area above the brine levels in the first and second stages C . combined as part of the distillate cooler D . another term used to describe the vapor feed heater

A . lower B . higher C . low D . high

A . a separate air ejector unit B . a direct unimpeded connection between second stage and salt water feed heater C . either by vacuum drag or an external line from the first stage via a fixed orifice D . the fixed orifice provided in the steam supply line

A . Sea water is heated to boiling temperature while under a vacuum B . Sea water is passed over heated plates in a thin film C . Heated sea water is injected into a vacuum chamber D . Sea water is forced through a heated eductor

A . Water is heated into vapor on heating surfaces B . Water is vaporized by pressure difference C . There are no heating-transfer surfaces D . There are more heating-transfer surface

A . completely filled with saltwater B . filled with de-scaling compound C . tightly closed to exclude air D . vented to the atmosphere

A . spray pipes B . demisters C . condensers D . splash baffle

A . condenser B . flashing device C . lashing device D . vacuum pum

A . distilling condenser B . salt water feed heater C . distillate cooler D . flash chamber

A . vaporize, with the unflashed water remaining at the temperature at which it entered the flash chamber B . vaporize, with the unflashed water equalizing to the saturation conditions existing in the flash chamber C . vaporize, with the remaining water at the temperature greater than it entered the flash chamber D . boil, allowing steam bubbles to rise through the brine at the bottom of the flash chamber

A . Sea water is heated to boiling temperature under a vacuum B . Sea water is passed over heated plates in a thin film C . Heated sea water is injected into a vacuum chamber D . Sea water is forced through a heated eductor

A . first stage B . second stage C . distillate cooler D . salt water feed heater

A . Distiller air ejector cooling medium B . Saltwater heater discharge C . First-stage internal feed box D . Second-stage internal feed box

A . The colder seawater passing through the condenser tube bundles of the various stages increases evaporator vacuum B . The amount of heated feed water discharged from the feed water heater after cndenser is increased C . Fewer non-condensable gases are created by the flow of colder seawater D . More seawater is allowed to pass through the flint stage overflow weir

A . Feed-water heater internal tube surfaces B . Internal distillate cooler tubes C . Flash chamber vertical surfaces D . Distilling condenser tube

A . Production of high salinity distillate B . Seawater feed temperature below 165℃ C . A leak in the first stage demister D . A cracked distillate pump vent line

A . evaporator B . condenser C . expansion valve D . compressor