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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The thermostatic expansion valve is used in ________ type of evaporators.

Dry
Flooded
None of these
DX coil

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Refrigeration and Air Conditioning
In air-conditioning of aeroplanes, using air as a refrigerant, the cycle used is

Reversed Joule cycle
Reversed Brayton cycle
Reversed Carnot cycle
Reversed Otto cycle

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Refrigeration and Air Conditioning
The conditioned air supplied to the room must have the capacity to take up

Both room sensible heat and latent heat loads
None of the listed here
Room sensible heat load only
Room latent heat load only

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Refrigeration and Air Conditioning
Nusselt number (NN) is given by

NN = V²/t.cp
NN = ρ V l /μ
NN = hl/k
NN = μ cp/k

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Refrigeration and Air Conditioning
Moisture in Freon refrigeration system causes

High power consumption
Ineffective refrigeration
Freezing automatic regulating valve
Corrosion of whole system

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Refrigeration and Air Conditioning
Ammonia is

Highly toxic and inflammable
Toxic and non-inflammable
Non-toxic
Non-inflammable

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MORE MCQ ON Refrigeration and Air Conditioning

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