Power Engineering 4th Class Ch 123 final Questions with complete solution 2024/2025
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Course
BOIE 8010
Institution
BOIE 8010
Power Engineering 4th Class Ch 123 final Questions with complete solution 2024/2025 Power Engineering 4th Class Ch 123 final
b - correct answer In the Lithium Bromide refrigeration system, what is the function of the concentrator (generator)?
Choose one answer.
a. To exchange heat between ...
Power Engineering 4th Class Ch 123
final
b - correct answer ✔In the Lithium Bromide refrigeration system, what is the
function of the concentrator (generator)?
Choose one answer.
a. To exchange heat between the high temperature refrigerant vapour and
the atmosphere
b. To increase the absorbency potential of used absorbent
c. To speed up the evaporation of the refrigerant
d. To cool the concentrated absorbent
e. To cool the refrigerant vapour
b - correct answer ✔Most absorption refrigeration systems are put in place
where there is cheap excess or waste heat available. What is this heat
primarily used for?
Choose one answer.
a. To pressurize the system
b. To evaporate the water out of the weak Lithium Bromide
c. To decrease the evaporation point of the refrigerant
d. To maintain a minimum load on the system, during periods of low cooling
demand
e. To maintain the continuous vacuum
d - correct answer ✔Which of the following statements about Lithium
bromide absorption refrigeration systems is false?
Choose one answer.
a. Lithium bromide solution has the ability to absorb water vapour readily
, b. The system efficiency is increased by forcing water through a spray header
c. Evacuating the system lowers the boiling point of water
d. As water vapour is absorbed by lithium bromide, the vacuum in the
evaporator decreases
e. The operating cycle in the system is continuous
d - correct answer ✔In an Ammonia Absorption refrigeration system, what is
used as the absorbent?
Choose one answer.
a. Ammonia
b. Air
c. Lithium Bromide
d. Water
e. Freon
d - correct answer ✔In a Lithium Bromide refrigeration system, which of the
following is the refrigerant?
Choose one answer.
a. Lithium Bromide
b. Ammonia
c. Freon-22
d. Water
e. Strong aqua
c - correct answer ✔Ammonia systems are seldom used for air conditioning
purposes in large building mainly because ammonia:
Choose one answer.
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