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When humidity ratio of air ____ air is said to be dehumidified.


A) increases
B) decreases
C) remains constant
D) none of the mentioned

E) A) and B)
F) All of the above

Correct Answer

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Water is used as a ____ in air conditioning units.


A) absorbent
B) refrigerant
C) absorbent and refrigerant
D) none of the mentioned

E) None of the above
F) All of the above

Correct Answer

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The vapour going to condenser is ____ in temperature and ____ in ammonia.


A) higher, less
B) higher, richer
C) lower, less
D) lower, richer

E) B) and C)
F) A) and D)

Correct Answer

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An increase in diameter means a _________ heat transfer coefficient.


A) larger
B) smaller
C) zero
D) infinite

E) A) and C)
F) A) and D)

Correct Answer

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In traditional Air conditioners in home appliances, what is the type of condenser used?


A) natural convection type
B) forced convection type
C) flash type
D) rotary condensers

E) A) and D)
F) B) and C)

Correct Answer

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The wet bulb temperature is the ____ temperature recorded by moistened bulb.


A) lowest
B) highest
C) atmospheric
D) none of the mentioned

E) All of the above
F) B) and D)

Correct Answer

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A

Evaporative condensers combine the features of a _____________ in a single unit.


A) cooling tower and water-cooled condenser
B) falling tower and water-cooled condenser
C) cooling tower and air condenser
D) rising film tower and water-cooled condenser

E) A) and D)
F) None of the above

Correct Answer

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In evaporative condensers, ___________ used to extract heat from the condensing refrigerant.


A) air is
B) both air and water are
C) water is
D) either air or water is

E) B) and C)
F) None of the above

Correct Answer

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Shell and coil type condensers have a capacity at around ________


A) 10 tr
B) 20 tr
C) 30 tr
D) 50 tr

E) A) and B)
F) None of the above

Correct Answer

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why is an analyser-rectifier combination is used in absorption refrigeration cycle?


A) to increase the amount of water vapour in ammonia vapour
B) to decrease the amount of water vapour in ammonia vapour
C) to eliminate the water vapour from ammonia vapour
D) all of the mentioned

E) A) and B)
F) B) and C)

Correct Answer

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In fountains the type of nozzle used is


A) none of the mentioned
B) turbulent jet
C) high speed nozzle
D) laminar jet

E) C) and D)
F) B) and C)

Correct Answer

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When unsaturated air flows over a sheet of water in an insulated chamber


A) specific humidity of air decreases
B) the water evaporates
C) both air and water are cooled during evaporation
D) all of the mentioned

E) A) and B)
F) A) and C)

Correct Answer

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Which type of fins are the most commonly used fin type in condensers?


A) annular fin
B) plate type fins
C) tube fin
D) extended double pipe

E) A) and B)
F) B) and C)

Correct Answer

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Evaporative condensers are used in places where water is _________


A) scarce
B) plenty
C) moderately available
D) sufficient

E) A) and B)
F) A) and C)

Correct Answer

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Cooling towers are rated in terms of


A) approach
B) range
C) both of the mentioned
D) none of the

E) A) and B)
F) A) and C)

Correct Answer

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In traditional Refrigerators in home appliances, what is the type of condenser used?


A) natural convection type
B) forced convection type
C) furnace type
D) rotary condensers

E) None of the above
F) A) and D)

Correct Answer

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A

Double pipe water cooling condensers have a capacity at around ________


A) 10 tr
B) 20 tr
C) 30 tr
D) 50 tr

E) A) and B)
F) A) and C)

Correct Answer

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A

Critical pressure ratio is ratios of pressures at______________discharge.


A) minimum
B) none of the mentioned
C) optimum
D) maximum

E) A) and D)
F) None of the above

Correct Answer

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The ratio of the useful heat drop to the isentropic heat drop is called______________      


A) condenser efficiency
B) nozzle efficiency

C) A) and B)
D) undefined

Correct Answer

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What is the meaning of heat rejection ratio (HRR) of a condenser?


A) ratio of heat rejected to the heat absorbed
B) ratio of heat absorbed to the heat rejected
C) ratio of heat required to the heat lost
D) ratio of heat wasted in a cycle to the heat absorbed

E) All of the above
F) A) and B)

Correct Answer

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