ESWS EXAM
State the type of the Air Conditioning (AC) plants onboard. - answer Six, 250-ton
centrifugal chill water A/C plants that operate with R-114 type refrigerant.
State the type of the refrigeration plants and refrigeration units onboard. - answer Two,
8-ton reciprocating plants that operate with R-134A type refrigerant
State the purpose of the following major components: Compressors - answer
Compresses refrigerant into a high-pressure gas; moves refrigerant though the
refrigeration cycle.
State the purpose of the following major components: Chill water pump - answer
Circulates the chilled water throughout the ship, then back to the A/C plants.
State the purpose of the following major components: Condenser - answer Condenses
the compressed refrigerant into a liquid state. Seawater in tubes cools the refrigerant
outside the tubes. The vapor condenses into liquid.
State the purpose of the following major components: Receiver - answer Storage area
(tank) for liquid refrigerant after being condensed. Also, when maintenance or repairs
are made, the unit is "pumped down" which returns and stores all the refrigerant to the
receiver.
State the purpose of the following major components: Freeze box - answerUsed for the
preservation and storage of frozen stores.
State the purpose of the following major components: Chill box - answerUsed for the
preservation and storage of stores requiring refrigeration and humidity control and for
thawing frozen stores.
State the purpose of the following major components: Thermal expansion valve -
answerRegulates the amount of refrigerant admitted into the evaporator.
Discuss the elements of the following sewage Collection, Holding, and Transfer (CHT)
system: Comminutors - answerWaste passes through and is broken down by metal
teeth prior to entering holding tanks.
Discuss the elements of the following sewage Collection, Holding, and Transfer (CHT)
system: Holding tanks - answerTemporary storage areas for waste. Used while in port
and when transiting within 12 nautical miles of land. There are four tanks on MT.
Whitney. Two fwd with maximum capacity of 9000 gallons each. Two aft with max of
12,000 gallons each.
, Discuss the elements of the following sewage Collection, Holding, and Transfer (CHT)
system: Aeration systems - answerFans provide a constant flow of air to the holding
tanks to kill anaerobic bacteria. The air from the tanks is vented over the side.
Discuss the elements of the following sewage Collection, Holding, and Transfer (CHT)
system: Tank level indicators, alarm system - answerAudio visual alarms are located in
the DCC. Alarm is activated when the tank level reaches 90%. There are no tank level
indicators.
Discuss the elements of the following sewage Collection, Holding, and Transfer (CHT)
system: Sewage ejection pumps - answerPumps waste from the holding tanks to either
the risers or overboard.
Discuss the elements of the following sewage Collection, Holding, and Transfer (CHT)
system: Diverter valves - answerMulti-position valves used to align the flow of waste
from holding tanks to either the risers or overboard.
Discuss the elements of the following sewage Collection, Holding, and Transfer (CHT)
system: Deck discharge connections - answerThere are 4 risers located fwd and aft on
both port and STBD sponsons.
Explain the three modes of operation of the CHT system. - answerAuto - pumps start
when tank level reaches 60% and stops at 30%
Manual 1 - pump will continually run regardless of tank level.
Manual 2 - pump will operate until tank level reaches 30% but will not re-start
State the safety precautions associated with: Sewage spill clean-up - answerClean up is
accomplished by authorized personnel only. Protective clothing, "poopy suits" rubber
gloves, and boots are worn. Eating, drinking and smoking is prohibited in the area. The
spill is sanitized with Betadine. Personnel wash with anti-bacterial soap.
State the safety precautions associated with: Hydrogen sulfide gas - answerSharp
intense smell of rotten eggs. Area must be immediately evacuated as the fumes are
toxic.
State the purpose of the ships' Oil Pollution Control system. - answerTo minimize
pollution to water by oils by providing storage for oily waste and waste oil, and provide a
means to separate or process oily waste. The navy's goal is zero pollution from
shipboard oils.
State the purpose of the following major components: Oily Water Separator (OWS) -
answerUsed to process oily waste, meaning separate the oil form the water. The water
is then pumped overboard and the oils are stored in the waste oil tank located in the
engine room, lower level, starboard side of the main engine.
State the type of the Air Conditioning (AC) plants onboard. - answer Six, 250-ton
centrifugal chill water A/C plants that operate with R-114 type refrigerant.
State the type of the refrigeration plants and refrigeration units onboard. - answer Two,
8-ton reciprocating plants that operate with R-134A type refrigerant
State the purpose of the following major components: Compressors - answer
Compresses refrigerant into a high-pressure gas; moves refrigerant though the
refrigeration cycle.
State the purpose of the following major components: Chill water pump - answer
Circulates the chilled water throughout the ship, then back to the A/C plants.
State the purpose of the following major components: Condenser - answer Condenses
the compressed refrigerant into a liquid state. Seawater in tubes cools the refrigerant
outside the tubes. The vapor condenses into liquid.
State the purpose of the following major components: Receiver - answer Storage area
(tank) for liquid refrigerant after being condensed. Also, when maintenance or repairs
are made, the unit is "pumped down" which returns and stores all the refrigerant to the
receiver.
State the purpose of the following major components: Freeze box - answerUsed for the
preservation and storage of frozen stores.
State the purpose of the following major components: Chill box - answerUsed for the
preservation and storage of stores requiring refrigeration and humidity control and for
thawing frozen stores.
State the purpose of the following major components: Thermal expansion valve -
answerRegulates the amount of refrigerant admitted into the evaporator.
Discuss the elements of the following sewage Collection, Holding, and Transfer (CHT)
system: Comminutors - answerWaste passes through and is broken down by metal
teeth prior to entering holding tanks.
Discuss the elements of the following sewage Collection, Holding, and Transfer (CHT)
system: Holding tanks - answerTemporary storage areas for waste. Used while in port
and when transiting within 12 nautical miles of land. There are four tanks on MT.
Whitney. Two fwd with maximum capacity of 9000 gallons each. Two aft with max of
12,000 gallons each.
, Discuss the elements of the following sewage Collection, Holding, and Transfer (CHT)
system: Aeration systems - answerFans provide a constant flow of air to the holding
tanks to kill anaerobic bacteria. The air from the tanks is vented over the side.
Discuss the elements of the following sewage Collection, Holding, and Transfer (CHT)
system: Tank level indicators, alarm system - answerAudio visual alarms are located in
the DCC. Alarm is activated when the tank level reaches 90%. There are no tank level
indicators.
Discuss the elements of the following sewage Collection, Holding, and Transfer (CHT)
system: Sewage ejection pumps - answerPumps waste from the holding tanks to either
the risers or overboard.
Discuss the elements of the following sewage Collection, Holding, and Transfer (CHT)
system: Diverter valves - answerMulti-position valves used to align the flow of waste
from holding tanks to either the risers or overboard.
Discuss the elements of the following sewage Collection, Holding, and Transfer (CHT)
system: Deck discharge connections - answerThere are 4 risers located fwd and aft on
both port and STBD sponsons.
Explain the three modes of operation of the CHT system. - answerAuto - pumps start
when tank level reaches 60% and stops at 30%
Manual 1 - pump will continually run regardless of tank level.
Manual 2 - pump will operate until tank level reaches 30% but will not re-start
State the safety precautions associated with: Sewage spill clean-up - answerClean up is
accomplished by authorized personnel only. Protective clothing, "poopy suits" rubber
gloves, and boots are worn. Eating, drinking and smoking is prohibited in the area. The
spill is sanitized with Betadine. Personnel wash with anti-bacterial soap.
State the safety precautions associated with: Hydrogen sulfide gas - answerSharp
intense smell of rotten eggs. Area must be immediately evacuated as the fumes are
toxic.
State the purpose of the ships' Oil Pollution Control system. - answerTo minimize
pollution to water by oils by providing storage for oily waste and waste oil, and provide a
means to separate or process oily waste. The navy's goal is zero pollution from
shipboard oils.
State the purpose of the following major components: Oily Water Separator (OWS) -
answerUsed to process oily waste, meaning separate the oil form the water. The water
is then pumped overboard and the oils are stored in the waste oil tank located in the
engine room, lower level, starboard side of the main engine.
